News from Schwing Bioset

Upgrading a Reliable Necessity - Piston Pumps at the Greeley WWTP


Written by Joshua DiValentino, December 2, 2015

The City of Greeley, Colorado, wastewater treatment facility recently implemented a series of strategic upgrades and major improvements were made to the Biosolids Facility. The Greeley facility repurposes its dewatered biosolids cake by trucking it for land application into remote Northern Colorado. The existing Schwing Bioset piston pump located in the sludge dewatering building had been in operation for 20 years and was a key component of this process.

The Greeley facility had relied on its sole Schwing Bioset KSP 25 cake pump for two decades prior to the upgrades. During that time, the existing pump was the only means of transportation for dewatered biosolids between the centrifuge dewatering equipment and the truck loading bin. The piston pump could have been a “bottle-neck” for a facility with limited storage capacity. However, the existing pump provided an exceptionally high level of uptime over its operational life at Greeley, with minimal wear part consumption.   

By 2014-15 the sole KSP 25 had been in operation since the mid 90’s. The City of Greeley facility, working on a larger plant upgrade, decided to implement a new pumping system for the coming decades. Greeley once again chose to invest in a Schwing Bioset KSP Piston pump.

In order to be as cost effective as possible, but also provide maximum redundancy for the foreseeable future, Greeley chose to purchase a new KSP 25, as well as upgrade the existing KSP unit to modern standards. The existing pump was upgraded to match the new KSP unit with control modifications, and upgraded safety features offer easier remote operation and even longer wear part life. The existing unit was also outfitted with a new Hydraulic Power Unit, offering modern hydraulic feed pumps and unlimited control variability.  The two pumps provide redundancy and additional capacity for growth, as well as a modern control network with the current plant SCADA.

Schwing Bioset KSP Municipal Piston Pump  Schwing Bioset Hydraulic Power Pack

The new pump system included a Hydraulic Power Pack, a Twin Screw Feeder, the Control Panel, and of course the Piston Pump. The Schwing Bioset services team worked with the installing contractor and Greeley personnel to integrate the updated control system features on both pumps with the plant MCC.  The new Schwing Bioset KSP cake pumping system (complete with two fully-operational pumps) was turned over to the City of Greeley in the fall of 2015.       

To learn more about this project specifically or learn more about our pumps, please contact this blog’s author, Josh DiValentino, call 715.247.3433, and/or visit our website here: SBI Municipal Pumps.


Tags: Piston Pumps, Biosolids, Wastewater Treatment, Pumps, Municipal Pumps

Screw Press and Bioset Demo Leads to Treatment Plant Expansion


Written by Tom Welch, September 10, 2015

The Springfield, IL, Metro Sanitary District (SMSD) Sugar Creek Plant is going to be expanding over the next two years.  They currently have no dewatering capability and they treat their liquid sludge with lime and liquid land-apply on their own fields onsite at the plant.  In June of 2013, Schwing Bioset was invited to run a dual demo of their screw press and Bioset systems.  The pilot study was conducted for two weeks where the Waste Activated Sludge (WAS) was dewatered with the screw presses and then converted to a Class A EQ product through the advanced alkaline stabilization Bioset process.  Crawford, Murphy, and Tilly Engineers coordinated the pilot study for the District.

Prior to the pilot study, the plant operations team was leaning toward using belt presses for their future dewatering needs.  They had familiarity with belt presses and they were concerned that screw press technology did not have the capability to meet their requirements of 2660 dry pounds per hour without having to install a large number of screw press machines.  They were basing their concerns on historical screw press throughput capability based on their market research.


(Pilot Study Setup at SMSD Sugar Creek Plant)

During the pilot study, the Schwing Bioset team brought their FSP 600 screw press machine to dewater the partially aerobically digested WAS.  The goal was to dewater the material to the highest percent solids, with an excellent capture rate, and also with the least amount of polymer consumption.  The dewatered product would then be passed along to the mobile Bioset operation, which is an advanced alkaline stabilization process that can produce a Class A EQ Biosolid end product that can be utilized as a fertilizer or a soil amendment. 

The first week of the demo was utilized to optimize the screw press performance, and the second week to monitor continued performance of the screw press while utilizing the Bioset operation to produce a Class A EQ product. The purpose of this was to monitor the product over a couple month period to determine the stability of the Class A EQ product at the Springfield plant.  Over the two weeks, the FSP 600 screw press unit produced a dewatered product of 30% solids on average, even while operating the machine at 130-150% of design throughput capability.  After polymer optimization, the end result was realized with 14 pounds of active polymer per ton and the capture rate was above 95% during the entire two week period.  During the second week of the pilot, the Bioset system was utilized the entire time and was successful in producing the Class A EQ product.

Based on the successful results of the pilot, SMSD gave Crawford, Murphy, and Tilly the direction to design the new biosolids handling facility to include two high-performance screw presses, each capable of dewatering 1330 dry pounds per hour.  Although they liked the simplicity of the Bioset Class A operation, they were uncertain if the need for Class A was justified for the new facility.  They settled on a Class B Bioset system that utilizes all of the components of the Class A design, except for the reactor.  Space was left in the building to install the reactor in the future should Class A become necessary.  The job bid in December of 2014 and Schwing Bioset received an order for the two high-performance screw presses and the Class B alkalization system in early 2015. 

These FSP 1102 screw presses showcase the capabilities of high-performance screw presses and offer larger plants an appealing alternative to traditional belt filter press or centrifuge dewatering.

To learn more about our screw presses, Bioset process, and/or this project specifically, contact a Schwing Bioset Regional Sales Manager, call 715.247.3433, email us, and/or visit our website here.


(Class A EQ product at 44% solids)



Tags: Class 'A' Biosolids, Bioset Process, Alkaline Stabilization, Class AA/EQ Biosolids, Biosolids, Wastewater Treatment, Screw Press, Dewatering

City of Stockton WWTP - Enduring Performance, Replacing a Legacy


Written by Joshua DiValentino, August 27, 2015


The City of Stockton wastewater treatment facility has seen its fair share of challenges in recent years. When financial resources were limited, the burden fell upon the operations/maintenance staff and the existing equipment to continue operations with aging infrastructure. At this point, the piston pumps supplied by Schwing Bioset, Inc. (SBI), located in the sludge dewatering building, had been in operation for over 20 years.


The pair of KSP 25 pumps moved dewatered sludge cake from the dewatering building out to the truck loading building, several hundred feet away. The two systems were the only means of transporting dewatered sludge cake for the 30 MGD facility. Regardless of the operational circumstances, with a resourceful operations/maintenance staff and the help of SBI technical support, the pumps remained in service with over 129,900 hours on the meter.

By 2014-15 the pair of KSP 25’s had been in operation since early 90’s, and were now nearly 25 years old. The City of Stockton facility was now emerging from a turnaround and making critical investment upgrades. Stockton once again chose to invest in Schwing Bioset Piston Pumps and replace the aged pumps with brand new KSP 25’s in the dewatering building. The new pumps have the same durability to last another thirty years, and with upgraded safety and control features that offer easier remote operation and even longer wear part life.

The SBI field services team was also hired to remove the exiting units and re-install the new pumps. The pump system was replaced by SBI in full including; Hydraulic Power Packs, Twin Screw Feeders, Control Systems, and of course the Piston Pumps. The SBI crew was able to work seamlessly with Stockton personnel to not upset active onsite operations during installation. As such, the pumps were replaced in series to phase out the old system. A completely brand new turn-key cake pumping system will be turned over to the City of Stockton this year.          

To learn more about our piston pumps or this project specifically, contact a Schwing Bioset Regional Sales Manager, call 715.247.3433, email us, and/or visit our website here.


Tags: Piston Pumps, Wastewater Treatment, Municipal Pumps, Dewatered Sludge Cake

Recent Changes Have WWTP Poised to Become a Regional Solution for Sludge Disposal


Recent changes have Buffalo-area’s Bird Island WWTP poised to become a regional solution for sludge disposal.


Written by Larry Trojak, Trojak Communications

Version also published in WE&T Magazine, July 2015


Sharing the Wealth

Wastewater treatment plants, like most of their business counterparts today, are being forced to cope with a barrage of challenges including rising costs, an often-demanding customer base and an ever-changing economic landscape. To effectively deal with these and other issues, a growing number of plants are thinking outside the box to improve their operations. For the Buffalo (N.Y.) Sewer Authority (BSA), that creative effort now includes supplementing their own volume of dewatered sludge with a similar (but richer) product from neighboring communities. Doing so is allowing them to dramatically reduce incineration-related fuel costs and, at the same time, assist those communities with their sludge disposal problems. Sharing biosolids? Seems only fitting from a utility serving the “City of Good Neighbors.”


Good Day at Black Rock

First chartered in 1937 as a primary-only treatment plant, the facility now known as the Bird Island WWTP near Buffalo’s Black Rock District was expanded to include secondary treatment in the late 1970s. According to Tom Caulfield, BSA’s administrator of capital improvements and development, the expansion was in direct response to Clean Water Act mandates.

“That massive expansion — essentially, construction of a totally new secondary treatment facility — added aeration and secondary clarification capabilities,” he says. “Even today, few people realize that Bird Island is the second largest wastewater treatment plant in all of New York state.  Only the Newtown Creek WWTP in Brooklyn’s Greenpoint community is larger. We are designed to handle a peak flow of up to 540 million gallons per day (MGD) but are currently averaging flows of about 130 mgd.”

In addition to the city of Buffalo, Bird Island WWTP serves a good number of other neighboring communities including the villages of Sloan and Depew, and the towns of West Seneca, Orchard Park, Alden, Lancaster, Cheektowaga, Elma and includes a limited amount of flow from the Town of Tonawanda. Despite that vast coverage, it was actually the nearby Town of Amherst which, by choosing to re-think its overall approach to sludge disposal, dramatically changed the complexion of Bird Island WWTP’s biosolids processing operation.


Plan B for Amherst

For more than a decade, the Town of Amherst had been dewatering its sludge, pelletizing it, and working hard to generate a market for it as a high-grade fertilizer product. In 2010, however, rising operational costs, coupled with aging equipment, prompted them to rethink that strategy, according to Michael Letina, BSA’s treatment plant superintendent.

“Amherst was hoping to have the same level of success with their fertilizer pellet that the Milwaukee Metropolitan Sewerage District has had with their Milorganite, but that just never happened,” he says. “Then they reached a point at which their digesters needed serious repair and, rather than incur the costs of upgrading the system, they started looking for alternatives. They determined that sending their [dewatered] waste activated sludge (WAS) here would make the most sense for them both logistically and financially.”

In early 2010 a 10-year agreement was signed, approving Amherst’s shipment of material from their facility to Bird Island. Today, about 70,000 pounds of WAS is trucked in on a daily basis from Amherst to the Black Rock location.


To Burn or Not to Burn

Getting Bird Island to a point where they could efficiently accept Amherst’s sludge was no small undertaking. Working through the Buffalo branch of the engineering firm Arcadis U.S., Inc., plans were drawn up and considered, with the final $2.38 million construction contract offering a couple of options for the material being delivered.


“Essentially, the process began with construction crews cutting a hole in the15-inch thick floor of our truck weighing area, and installing a 60 cubic yard push floor bin supplied by Schwing Bioset (Somerset, WI). There, customers’ vehicles — at the beginning it was only the Town of Amherst’s trucks — could empty the dewatered WAS they were delivering,” says Letina. “The hopper contains a hydraulic push-floor that sends material through a gate where it drops into a screw feeder, then into a Schwing Bioset KSP 12V (HD) pump designed for 1,000 psi operating pressure which pushes it up to the third floor for incineration. Depending on our needs at the time, we also have the option to take that sludge out of the bin through an alternate extraction screw conveyor and drop it down to the sub basement where it can be re-wetted and sent to our digesters to produce methane.” 

Adding Amherst’s dewatered WAS to the operation was a win-win in a number of regards. Not only did it address the town’s needs to effectively dispose of its sludge, the material’s high volatile content — generally in the 76% range — proved an excellent fuel for Bird Island’s incineration effort.

“Our own biosolids are anaerobically digested and, as a result, are only about 46 percent volatile, so it takes a considerable amount of gas to burn,” says Letina. “However, putting material from Amherst on top of it is like throwing lighter fluid on an open flame. Now, we continually monitor to see whether methane production or incineration will serve us better. It’s a nice luxury to have.”


On the Up and Up

With the Amherst-generated cake added to the equation, steady, reliable equipment operation is key to ensuring that both plants realize the maximum benefit of the new effort.  The Schwing Bioset biosolids pump installed as part of the recent expansion has definitely risen to the challenge, says Alex Emmerson, BSA’s process coordinator.


“The pump has its work cut out for it, taking material that is generally in the 26% to 28% solids range and sending it more than 65 feet straight up to the conveyor feeding the incinerator,” he says. “To handle issues of excessive in-line friction, Schwing Bioset also supplied an injection-ring system that lubricates the pipe wall with a small amount of fluid as it moves.”

On average, Bird Island maintains about 900,000 pounds of inventory on its secondary treatment system. They recently had a case, however, in which inventories ran low, prompting the need to curtail wasting. “That meant we had to rely solely on the ‘outside’ Biosolids and really push the pump — sometimes operating it at three times its normal speed,” says Emmerson. “Even with the added workload we were consistently pumping 8,000 pounds per hour and never had an issue. It’s definitely a key part of the operation.”

He adds that there is a certain peace of mind in knowing that the outside biosolids operation (which just recently was expanded to include a similar agreement with the Town of Tonawanda), affords them a nice contingency plan.

“Now we know we are covered if something unforeseen — like a centrifuge failure — occurs and we need to step up production using the imported biosolids to meet incinerator demand.” 


Money in the Bank

BSA has been prepping for growth for some time now, an effort that included a recent incinerator rehab. According to Letina, that updating, which included a new scrubber pack and burners, and carried a price tag of nearly $5 million, allows them to meet new environmental regulations that take effect in March, 2016.  However, their ability to become a regional biosolids processor — and keep costs steady in doing so — is a real source of pride.

“Much of the preliminary work for this part of the operation is the brainchild of Jim Keller our treatment plant superintendent and Roberta ‘Robbie’ Gaiek, BSA’s plant administrator,” says Caulfield.  “Because of their planning and foresight, we are already seeing the fruits of this effort.  Before the installation of the centrifuges and digesters, this plant used about 550,000 decatherms (Dth) of natural gas a year; now we are averaging about 175,000. So we’ve effectively cut our gas consumption by about 65%. With the rehabbed incinerator and addition of the higher volatile material from Amherst and Tonawanda, even with the added volumes we hope to be down around 150,000 to 160,000 Dth a year.”

The savings realized from Bird Island’s reduction in fuel costs is being reinvested in onsite projects, eliminating the need for bonding and the headaches that come with it. “More importantly,” says Caulfield, “it has also allowed us to go nine years now without a rate hike to our customers. In light of what the economy has been through, not a lot of utilities can say that.”


Looking Forward

Future plans under consideration —with additional anticipated savings — include a heat and power project designed to recover and re-use exhaust from the plant’s incinerators.

“The original plan was designed to incorporate the use of three waste/heat recovery boilers, says Letina.  “Once operational, the exhaust off the afterburners would create steam which would power a turbine and generate 1.5 - 2 megawatts of electricity — about 1/3 of our current load. Our electric bill right now is substantial — about $4.5 - $5 million a year. If we can save another $1.5 to $2 million annually, that money can be reinvested into the infrastructure, again avoiding bonding and rate hikes. The last few years have been challenging but definitely worth the effort. With these proposed changes and our growing role as a regional biosolids processor, this is an exciting time for Bird Island and BSA overall.”


To learn more about Schwing Bioset, our products and engineering, or this project specifically, please call 715-247-3433, email, view our website, or find us on social media.

To view a version of this story published in WE&T Magazine, click here.



Tags: Piston Pumps, Screw Feeders, Biosolids, Wastewater Treatment, Sewage Sludge, hydraulic push floor bin

When WWTP Says "No Tanks," Innovative Bioset Process Fills the Gap


Schwing Bioset Application Report 17, St. Petersburg, Florida

Written by Larry Trojak, Trojak Communications

Version also published in WE&T Magazine, November 2013




Wear is the unflagging enemy of every wastewater treatment plant. Plant operators can defend against it to the best of their ability; but in the end, time will win out, resulting in breakdowns and the occasional interruption in service. To cope with such occurrences, forward-thinking plants will always have a solid contingency plan in place. For the Southwest Water Reclamation Facility (WRF) serving the Water Resources Department’s southwest sector (including St. Petersburg, FL), their contingency - designed to deal with a pair of worn, aging digester tanks - involved bypassing the tanks entirely and processing biosolids through a Bioset sludge treatment process. Doing so is not only helping them avoid an operational nightmare and additional maintenance and expense, it is allowing them to improve the by-product of that biosolids operation - all at a time when costs to land-apply their “standard” product have skyrocketed. Timing, it seems, really is everything.


Decades of Wear

Originally built in 1955 as a four million gallon per day (mgd) facility, the Southwest Water Reclamation Facility (WRF) was literally replaced at the same location with a 20 mgd plant in 1978. It is one of four which serve the greater St. Petersburg area: Plant #1, for the southeast section of the area which includes downtown St. Petersburg; Plant #2, to serve the northeast section of town; Plant #3, for the northwest section of the area and the beach communities; and Plant #4, for the southwest section of St. Petersburg, as well as the incorporated towns of Tierra Verde and Gulf Port. According to Ken Wise, chief plant operator for the Southwest WRF, volumes at each plant are pretty much equal.

“Plant #1 is called the Albert Whitted WRF and it’s a little smaller since there are fewer residents downtown than in other parts of the city,” he says. “But each of the other three plants are 20 mgd facilities and treat roughly the same amount of sewage. Since the upgrade in 1978 we’ve all been running an anaerobic digestion process and creating a Class B product from the biosolids. For us, that approach worked well until time caught up with us in the form of badly-worn digester tanks which were causing odor issues for an adjacent college and residential developments in the area.”

Given that two of the tanks were built in 1955 with the original plant, and the third was added with the expansion more than 35 years ago, the wear factor is not surprising. Wise says other plants in the area were also seeing failures in both the covers and in their structures as a whole.

“We hadn’t had a failure yet, but the Water Resources Department was spending a good deal of money on
upkeep with us,” says Wise. “Under normal circumstances that would have probably sufficed and bought us a few more years. However, due to changing Florida regulations surrounding the land application practices of the Class B biosolids they were producing at the time, the department started seriously looking into alternative biosolids treatment technologies hoping to avoid repairing something that was not only at the end of its life, but also might not be a fit for that new effort.”


Repeat Success


To find that solution, the department looked at all possible alternatives, an initiative that included conducting pilot projects with various technologies at other locations in the city. One of those, at the Whitted plant, involved installing the Bioset Process sludge treatment system which uses a combination of pH and heat to stabilize the biosolids, thereby eliminating the need for digesters. 

In addition to being extremely low maintenance and operator friendly, Wise says that it had proven quick to implement and very successful there. “Ultimately the decision was made to install another system from Schwing Bioset here at Southwest,” he says. “Installation took place in July of last year (2012) and we were online by August.”

The installation, he adds, went smoothly, despite the fact that the Bioset Process had to be made to fit within the confines of an existing section of the plant rather than in a totally new site.

“The Bioset crew really worked with us to maximize use of the space we had and minimize disruption,” he says. “As a result, we probably have one of the few Bioset systems in which the reactor is raised some ten feet off the floor to fit with an existing opening. Now, sludge comes off the belt presses, is mixed with quicklime and sulfamic acid, and is pumped up into the reactor, where it spends at least 40 minutes at 135°F and achieves a pH of 12.5, before being discharged to the trailers.”

The newly-stabilized sludge is kept in the trailers on-site for 24 hours, at which point a sample is taken to ensure the pH is still in excess of 11.5 as required by Federal regulations. Since going online with the Bioset Process, Wise says the pH has never been less than 12.5.


Added Benefits

In addition to the elimination of virtually any odor and the complaints associated with it, it is the end product of the Bioset process - now a Class AA biosolid (the Florida equivalent of Class A-EQ) - which is the real benefit for Wise and his operation.

“In the past, our Class B material was suitable for use on sod farms and pasture lands, but because of its designation would have to be set back from any kind of food crops. By contrast, the Class AA product we get off the Bioset Process can be applied on golf courses, pastures, food crops - pretty much anywhere. In addition, because of a recent change in regulations, the other three area plants still generating the Class B biosolid are now paying an extra $300 more per trailer, while our costs dropped $100 per load. Granted, by adding the lime, the volumes are up about 10%, so the number of trailers we are shipping has increased. But even with that added into the equation, we are still saving 40 percent when compared to the Class B and have a much more usable product,” says Wise.

All of the Class AA material generated at the plant is currently either land applied at a site within an hour of the plant or sold as fertilizer to the local agricultural market. The previous Class B, by comparison, was hauled to sites more than three-hours away where it often found limited use.


Tanks for the Memories

The St. Petersburg WWTP has proven to be something of a case study in how to best deal with a set of unfortunate, challenging circumstances. Faced with a pair of failing digesters that were going to require a significant investment to rebuild, and which were creating odor issues for nearby residents, businesses, and students - the plant was able to solve the problems by abandoning the existing tanks and by adopting new technology in their operation. That solution from Schwing Bioset was implemented for less money than the tank rebuild project would have cost, it eliminated the odor issue, and includes the added benefit of processing cake directly to a Class AA biosolid (and gain more flexibility in the beneficial reuse of the end product), resulting in substantial net savings across the board.

"Since bringing in the Bioset System things have definitely settled down around here,” said Wise. “It’s been a great solution for us.” And, it would seem, all the issues created by the failing tanks are just fading memories.


To download the entire #17 application report for St. Petersburg, Florida, click here.

To learn more about Schwing Bioset, our products and engineering, or this project specifically, please call 715-247-3433, email, view our website, or find us on social media.

To view a version of this story published in WE&T Magazine, click here.


Tags: Class 'A' Biosolids, Bioset Process, Bioset System, Beneficial Reuse, Class AA/EQ Biosolids, Wastewater Treatment, Fertilizer

Schwing Bioset Exhibiting at WEF Residuals and Biosolids Conference


June 4, 2015

Schwing Bioset, Inc. will be exhibiting at the 2015 WEF Residuals and Biosolids Conference in Washington, DC, on June 8th and 9th.

Please be sure to stop by our booth (#106) while you're on the exhibit floor.


Visit the conference website to view the event details and exhibition map:

Here is the Schwing Bioset listing for the show:

Learn more about our Bioset Process and Class 'A' Biosolids, Dewatering Equipment, Pumps, and other products here:


If you'd like to meet with one of our team members, please contact for the names of the team members who are attending the show.

We hope to see you there!




Tags: Class 'A' Biosolids, Bioset Process, Events, Biosolids, Wastewater Treatment, Pumps, Dewatering

Where Should the "Stuff" Go - Part 2


Written by Scott Springer, Director of Sales and Marketing, Schwing Bioset, Inc.

May 29, 2015

Not in My Back Yard vs Solutions – An open discussion on disposal or re-use of Biosolids

Going back to the previous blog post discussing disposal or re-use of Biosolids, again, some of the environmentalists claim that the current US Government regulations (EPA Part 503) on Biosolids is either outdated based on the chemicals in today’s world or that there is an EPA conspiracy to hide the scientific facts from the public, and that somehow, the operators, equipment, and services people are behind it.  When Schwing Bioset posts on the subject, the reply from others is often that we only care about $$$ and profits at the expense of the health of people, animals, etc.

Schwing Bioset typically replies in this manner:

If there is or was a conspiracy, Schwing Bisoet has never been part of it.  I realize that the suppliers and solution providers are easy targets, because we are accessible, but any anger should really be directed at the Government agencies in charge. 
If the regulations are truly outdated, then the environmentalist effort needs to be to get the laws changed, not attack the people and companies who are following the current laws.
Also, I am not naive to believe that there are no companies out there with less than perfect ethics.  There are documented incidents of some service providers dumping sludge (treated or untreated) where they should not to scam profits.  I agree that there should be anger against these types of companies, but please don’t lump us all into that category.  There are a lot of good people and companies in this industry that want to provide a better world for all of us.  And this is business, even the good people need to make a fair profit in order to continue developing new and better solutions.


Schwing Bioset’s Bioset Process achieves Class ‘AA’ Biosolids via the time vs. temperature equation and pH adjustment per the EPA 503 regulations.  From start-up to shut-down, the Bioset Process remains an easy to operate system that is reliable, clean (enclosed), and odor controlled.  With ever-rising energy costs, the Bioset Process stands out as an economical method to producing Class ‘AA’ Biosolids.

For questions or more information on Biosolids or our Bioset Process, please leave a comment on this blog post and we will be sure to reply or contact you, or send an email to





Tags: Bioset Process, Beneficial Reuse, Biosolids, Wastewater Treatment

Where Should the "Stuff" Go - Part 1


Written by Scott Springer, Director of Sales and Marketing, Schwing Bioset, Inc.

May 27, 2015

Not in My Back Yard vs Solutions – An open discussion on disposal or re-use of Biosolids

The internet is a wonderful thing – sometimes.  Information is almost limitless, as are opinions on virtually any topic.  While it does not compare in magnitude to the doings of a Kardashian, there is a lot of vigorous debate on the topic of how Biosolids should be disposed of.   These debates play out on Twitter, LinkedIn Group chats, and local newspaper e-article comment areas, to name a few.  Some of the debates are polite, informational, and serve some purpose to educate those reading the content.  Others get nasty, personal, and are embarrassing.  In my opinion, these biosolids discussions tend to put people into one of 5 camps:

1. Environmentalists / Scientists

2. Engineers / Consultants / Suppliers to the Wastewater Treatment Industry (which Schwing Bioset would fall into)

3. Farmers

4. Citizens

5. Internet Trolls (a term I learned that basically describes people who just like to take out their frustrations on anyone and everyone on the internet)


Here is one trend that I have observed in these exchanges:

Several of the environmentalists claim that the waste treatment process is inadequate to remove all dangerous elements from the waste stream.  They will list dozens of chemicals that are put into the waste stream from pharmaceuticals (consumed or not) that we flush down the toilet every day to chemicals that are in the waste stream of industrial plants.

Schwing Bioset typically replies in this manner:

I don’t have an advanced degree in the sciences, so there is no use in me debating this point.  I do know (with my engineering degree) that:

       i.      Not every waste treatment plant has input that includes all of the chemicals on the list, especially the smaller to mid-size plants.  Some of the industrial plants have their own treatment or pre-treatment plants and don’t send any waste to the municipality.

       ii.      Some of the levels of these chemicals get into the parts per billion and trillion – which may or may not be harmful to people, animals, or plants.  But the reality is that some of these are way below the detectable limit of most analysis techniques available.  A lot of work needs to be done on this exhaustive list to determine what is really dangerous, and how to either remove it or prevent it from getting into the waste stream.

For more thoughts on ‘where the stuff should go,’ check back to the Schwing Bioset website soon.

For questions or more information on Biosolids or our Bioset Process, please leave a comment on this blog post and we will be sure to reply or contact you, or send an email to



Tags: Bioset Process, Beneficial Reuse, Biosolids, Wastewater Treatment

Schwing Bioset is Exhibiting at Several Trade Shows in May


Posted on Apr 30, 2015 9:33:00 AM

The Schwing Bioset Teams will be traveling nationally and internationally to exhibit at five trade shows during the month of May. 

To learn more about Schwing Bioset pumps (municipal or mining), fluid bed dryers, screw presses, sliding frames, the bioset process, and more, please be sure to find us on the exhibit floor at any of these upcoming shows:


California Water Environment Association (CWEA), April 28 - May 1 in San Diego, CA

Florida Water Resources Conference (FWRC), May 3 - 5 in Orlando, FL

Canadian Institute of Mining (CIM), May 9 - 11 in Montreal, Canada

Exponor Chile 2015, May 11 - 15 in Antofagasta, Chile

Central States Water Environment Association (CSWEA), May 18 - 20 in Oakbrook Terrace, IL


If you'd like to meet with one of our team members, please contact for the name of the contact(s) who is attending the show.

We look forward to seeing you!



Tags: Announcements, Bioset Process, Events, Biosolids, Wastewater Treatment, Schwing Bioset, Mining Pumps, Municipal Pumps

Schwing Bioset, Inc. Expands its Leadership Position as the Class A/AA Biosolids Solution Provider


Published on April 14, 2015 (Somerset, WI)

Schwing Bioset, Inc. has completed another successful Beneficial Reuse installation.  The City of Immokalee, Florida, chose Schwing Bioset to provide not only its Best in Class equipment, but design and build capabilities as well.

The heart of the system is the patented Bioset process and reactor that converts raw sludge into Class AA Biosolids, making it ready for easy land application.  Licensed as a fertilizer in the state of Florida, the Class AA product produced by the Bioset process is a highly marketable and sought after product.  Millions of tons have been produced and beneficially reused by the Bioset process. 

Taking advantage of some of the other high quality products Schwing Bioset offers, Immokalee integrated their Twin Piston Pump and Dewatering Screw Press into their design.

The Immokalee Water & Sewer District Executive Director, Eva Deyo, is very pleased with the system.  “The project came in under budget and went from concept to completion much quicker than other options.  As promised, the Schwing Bioset solution has proven to be easy to operate for our staff and very cost effective to operate, and the end product is exceptional,” said Deyo.  

Schwing Bioset Regional Sales Manager, Tom Welch, is thrilled with the results of the project.  “The City of Immokalee was tremendous to work with throughout the entire process.  Their vision and understanding of the value that the Schwing Bioset solution offered was evident throughout.  They realized after investigating numerous options that you don’t have to break the bank to get state-of-the-art technology,” said Welch.

“The experience of our Design, Engineering, and Project Management Teams has really shown during the execution of this fast track project.  The Schwing Bioset Team has executed on well over $150M in projects, with 2015 proving to be our biggest year ever,” said Tom Anderson, Owner and President of Schwing Bioset.

About Schwing Bioset

For more than 25 years, Schwing Bioset has been helping wastewater treatment plants, mines, and power generation customers by engineering material handling solutions. Schwing Bioset’s custom engineered solutions can be found in hundreds of wastewater treatment plants in North America as well as mines and tunnels around the world.

For questions or more information, please contact Schwing Bioset at 715-247-3433 or, or visit the website at

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Tags: Bioset Process, Piston Pumps, Municipal Biosolids, Beneficial Reuse, Class 'AA' Biosolids, Biosolids, Wastewater Treatment, Fertilizer, Recycled Waste, Schwing Bioset, Municipal, Screw Press