News from Schwing Bioset

Dewatering with a Screw Press at Upper Sandusky WWTP

 

Written by Eric Wanstrom

 

The city of Upper Sandusky, Ohio, operates a wastewater treatment plant that processes roughly two million gallons per day. The plant had historically aerobically digested their biosolids and dewatered them to approximately 10% dry solids content using drying beds. Due to the age of the drying beds, the hauling costs were continually increasing, which was creating a burden not only in expenses, but also on personnel time to keep the beds functioning.

Upper Sandusky began a search to identify new dewatering methods that could replace the aging drying beds. While exploring several technologies and performing multiple pilot studies to determine the best technology, not only from a performance standpoint, but also considering ease of use and maintenance requirements, screw presses were determined to be the preferred technology. 

Schwing Bioset was invited to run our screw press pilot, which proved quite successful, with cake results exceeding 20% dry solids. Plant staff were also impressed with the quality of construction and the ease of use of the machine.

Schwing Bioset equipment was chosen as the best value and was selected as the basis of design for the new dewatering building. The new FSP603 screw press will produce over 80% dryer cake than old drying beds, reduce the city’s hauling and disposal costs substantially as a result of the increased solids content produced, and reduce the amount of labor required by city staff. 

Schwing Bioset FSP603 Screw Press  Schwing Bioset FSP 603 Screw Press

The Schwing Bioset screw press provides a state-of-the-art solution for wastewater plants and consulting engineers looking to improve their dewatering process. Offering the widest range of model sizes available on the market, our screw presses also come with a wide range of features designed specifically with the wastewater treatment plant operator in mind.

Contact us to learn more about this project or visit here to learn more about our dewatering screw presses.

 

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Tags: Wastewater Treatment, Screw Press, Dewatering

NuReSys, a Schwing Bioset Partner, is Helping to Create Valuable Products from Biowaste in Europe

 

NuReSys Nutrient Management

Written by Kelly Kramer

Schwing Bioset’s partner, NuReSys, has been chosen to be a key player in the European VALUEWASTE project, which is an integrated approach to urban biowaste upcycling. This project is funded by the European Union to examine numerous different ways to create value from what are otherwise waste products. Of the numerous technologies and processes evaluated for consideration to participate in the program, NuReSys technology was identified as being flexible in its design to expand applicability and was selected to participate in the study.

Because existing systems such as landfilling and incineration don’t use the millions of tons of biowaste in Europe to its full potential, several partners are coming together to bring the waste reuse project to life. NuReSys’ role is to help in developing the first complete solution to create valuable biowaste by recovering phosphate as struvite using various organic waste products from households, restaurants, and other sources.

NuReSys commissioned the equipment that will complete the program work in September of 2020, and received publicity on a local news broadcast promoting the VALUEWASTE project and the participation of NuReSys. The project started in November 2018 and will last into late 2022.

To read more about this project, visit the NuReSys website or the VALUEWASTE website, and then contact Schwing Bioset to find out how NuReSys technology can be applied within your plant to upcycle your waste.

 

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Tags: Beneficial Reuse, NuReSys, Nutrient Management

Pima County, AZ, Tres Rios WRF Biosolids System Upgrades - Part Three: Mobile Dewatering Equipment Rentals

 

Written by Josh DiValentino

 

Background: The district of Pima County, AZ, operates a total of eight wastewater treatment plants. The Tres Rios Water Reclamation Facility (WRF) is the centralized biosolids processing facility for all Pima County plants. Tres Rios WRF currently operates 24/7/365 at a 30 MGD capacity, with a projected flow of 50 MGD in 2030. The facility process is; BNR, Anaerobic Digestion, Dewatering, Pumping, Truck Loading, and Land Application of biosolids (cotton is a common use). For nearly 20 years, Schwing Bioset, Inc. has provided solids handling solutions at Tres Rios with projects ranging from biosolids cake pumping and cake storage bins, to most recently, nutrient recovery and temporary Screw Press dewatering equipment.

 

Mobile Dewatering Units: During the Summer of 2020, Tres Rios WRF needed to take down their entire centrifuge dewatering facility for contractors to install the second new Schwing Bioset Cake Pump. The pumping system details are explained in Pima County, AZ, Tres Rios WWTP Biosolids System Upgrades - Part One: Cake Pumping. Operations had to find a reliable solution to divert flow from the entire 30 MGD facility. Schwing Bioset again had an opportunity to help, providing our massive FSP1103 and FSP703 Screw Press dewatering trailers for temporary dewatering.

 

Pima County Tres Rios Dewatering Screw Press Rental


Thickened sludge was fed from the Anerobic Digester to both presses. Once the sludge feed was connected via cam-lock hoses, power connected to the trailer, and the drain lines hooked up, the Screw Presses were ready to run. Technicians dialed in the polymer dose, screw press floc tank pressure, screw rotation speed, and discharge cone pressure to optimize performance. The Tres Rios operations team could then to divert sludge flow to the temporary dewatering trailers, and each system is capable of the following throughput:  

 

FSP1103 Trailer: Anaerobic Sludge

3208 dry lbs. / hour (1455 dry kg / hour) up to 214 gallons /minute (810 liters / minute) at 3% solids


FSP703 Trailer: Anaerobic Sludge

1365 dry lbs. / hour (620 dry kg / hour) up to 90 gallons /minute (340 liters / minute) at 3% solids

 

The FSP Screw Presses provided reliable dewatering for the entire Tres Rios facility for a few weeks while the new cake pump was installed. The presses were able to produce cake and filtrate quality performance near the plants existing centrifuges, producing an average of 17% cake solids while running near design capacity. The FSP screw press dewatering systems offered this level of high-performance dewatering and are a simple, easy to maintain, low energy consuming package, even at high flow rates from big plants.

 

Pima County Tres Rios Dewatering Screw Press Rental  

Click here to read more about our Products, then contact us to learn more about this project or find out how we can help your plant too.

 

Read the previous Pima County Project stories and stay tuned for Part Four on Struvite Management:

Part One: Cake Pumping

Part Two: Live Bottom Bins

Part Four: NuReSys Struvite Management Project

 

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Tags: Biosolids, Dewatering, Mobile Screw Press, Water Reclamation Facility

Schwing Bioset is Excited to Exhibit Virtually at WEFTEC Connect 2020

 

Schwing Bioset Biosolids Handling Solutions

 

Although it will look quite different in 2020, Schwing Bioset, Inc. (SBI) is once again exhibiting at the annual WEFTEC Expo, via our WEFTEC Connect Virtual Showcase, from October 5-9, 2020. Please be sure to stop by our virtual booth while you're exploring the online event to see our available contacts, schedule meetings with our staff, check out product videos, download brochures, and learn about how we help water and wastewater treatment plants. Even though we won’t be able to display our equipment on the floor this year, we can still provide answers to your questions, send you additional information, and connect for a conversation in the future to find the right solution for your plant.

 

Schwing Bioset’s products include, among others, biosolids piston pumps, screw presses, nutrient and struvite removal and management, membrane bioreactors, sliding frame and push floor silos, fluid bed drying products, the Bioset Process for Class A Biosolids, container wagons, live bottoms, and screw conveyors. We also offer on-site demos, mobile rentals, spare parts and equipment maintenance services, and training seminars. You can discover more about our products and solutions here.

 

In 2020, Schwing Bioset, Inc. (SBI) was proud to have acquired substantially all of the assets of Custom Conveyor Corporation (CCC) of Rogers, MN. Custom Conveyor has over 30 years of experience in the manufacturing of conveyance and storage systems with primary products consisting of shafted conveyors, shaftless conveyors, live bottoms, belt conveyors, gates, and Augie dumpster loaders. The acquisition increases SBI’s manufacturing capacity and vertically integrates our supply chain to shorten delivery schedules and enable more competitively priced products in the market. Learn more about Custom Conveyor, A Division of Schwing Bioset, here:

 

The SBI team members available at WEFTEC Connect include Executives, Regional Sales Managers, Service Managers, and more. If you would like to meet with any of these team members, please request a meeting through your WEFTEC Connect portal or email us and we'll put you in touch with the appropriate person to assist with your needs.

 

You can visit the conference website to view the event details, register, download the mobile app, see a list of exhibitors, and more: http://www.weftec.org.

 

We are excited to ‘see’ you at WEFTEC 2020!

 

Schwing Bioset at WEFTEC Connect 2020

 

 

 

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Tags: Announcements, Events, WEFTEC, Expos

Biosolids Plant Up and Running at Paragould WWTP

 

Published in Paragould Daily Press, August 2020

 

Thanks to a newly completed $5.15 million biosolids plant, not all the waste at Paragould Light, Water and Cable’s Wastewater Treatment Plant is actually going to waste. 

“We send out two 12-[cubic] yard trucks of biosolids a day, Monday through Thursday,” said plant Operations Manager David Romine on Monday. 

Romine said the biosolids, a byproduct of wastewater treatment and processed by the plant’s new Schwing Bioset equipment, go out to area farmers at a cost to them of $5 a cubic yard delivered, such that a fully loaded truck would cost $60.

In addition, the new equipment enables a savings of about $100,000 a year on the cost to operate and maintain the equipment, compared to the old system.

The Schwing Bioset system enables sludge produced to receive a rating of Class A EQ biosolid under the EPA 40 CFR 503 regulation. “The EQ means it’s ‘exceptional quality,’” Romine said, “which means you don’t have to do anything special in order to use it anywhere [as fertilizer].”

 

Click here to read the full article in the Pargould Daily Press

 

The Bioset Process allows the product to be used as a fertilizer under regulation for Class A EQ. Pictured is the Bioset unit, dewatering screw presses, piston pump, and truck loading operation. 

20200831_110158 (2)  20191003_134927

 

 

Tags: Class AA/EQ Biosolids, Dewatering, Wastewater Treatment Plant

Schwing Bioset, Inc., Acquires Assets of Custom Conveyor Corporation

 

 

Custom Conveyor, A Division of Schwing Bioset

 

August 2020

Schwing Bioset, Inc. (SBI) is proud to announce that it has acquired substantially all of the assets of Custom Conveyor Corporation (CCC) of Rogers, MN. In connection with the acquisition, SBI has:

- Retained all of the CCC staff with their decades of experience.

- Acquired all of the equipment for the production of their products.

- Acquired all existing project files to continue to provide on-going after-market support.

 

Additionally, SBI has taken over the greater than 20,000 square feet of office and production space for the continued manufacturing of Custom Conveyor and Schwing Bioset products.

CCC had over 30 years of experience in the manufacturing of conveyance and storage systems with primary products consisting of:

- Shafted Conveyors

- Shaftless Conveyors

- Live Bottoms

- Belt Conveyors

- Gates

- Augie Dumpster Loaders

 

The acquisition increases SBI’s manufacturing capacity and vertically integrates our supply chain to shorten delivery schedules and enable more competitively priced products in the market.

For more than 30 years, Schwing Bioset, Inc. has been helping wastewater treatment plants, mines, and industrial users by engineering solids handling solutions. Schwing Bioset’s custom-engineered solutions can be found in over a thousand facilities across North America and around the world.

Schwing Bioset’s products include, among others, sludge, industrial, and tunnel piston pumps, screw presses, nutrient removal and management, membrane bioreactors, sliding frame and push floor silos, fluid bed drying products, Bioset process for Class A Biosolids, container wagons, and screw conveyors. The company also offers on-site demos, spare parts and equipment maintenance services, and training seminars. 

 

To learn more about Custom Conveyor, a Division of Schwing Bioset, visit here or contact us.

 

Belt Conveyor   Augie Dumpsters

 

Tags: Conveyors, Live Bottoms, Custom Conveyor, Augie Dumpsters

Pima County, AZ, Tres Rios WRF Biosolids System Upgrades - Part Two: Live Bottom Cake Bins

 

Written by Josh DiValentino

 

Background: The district of Pima County, AZ, operates a total of eight wastewater treatment plants. The Tres Rios Water Reclamation Facility (WRF) is the centralized biosolids processing facility for all Pima County plants. Tres Rios WRF currently operates 24/7/365 at a 30 MGD capacity, with a projected flow of 50 MGD in 2030. The facility process is; BNR, Anaerobic Digestion, Dewatering, Pumping, Truck Loading, and Land Application of biosolids (cotton is common use). For nearly 20 years, Schwing Bioset, Inc. has provided solids handling solutions at Tres Rios with projects ranging from biosolids cake pumping and cake storage bins, to most recently, nutrient recovery and temporary Screw Press dewatering equipment.

 

Live Bottom Cake Storage: In 2012, the facility completed a Regional Optimization Master Plan expansion, which included upgrades to the centrifuge building and a new truck loading building. Prior to this expansion, dewatered cake was pumped (using the original Schwing Bioset Piston Pump) directly through a pipeline to the truck loading area. There was no intermediate storage capacity in the system on the dewatered cake side. Further, trucks could only be filled as fast as the cake pump could deliver cake, significantly reducing truck fill times.

 

Tres Rios Storage w-caption 2During the 2012 expansion, Schwing Bioset, Inc., supplied the new truck loading cake bins. Three (3) live bottom bins were provided, each with a capacity of 3,000 cubic feet of cake storage.

  • Bin Silo Sizing Details (each): Circular Design, 12’ diameter and 33’ tall storage area. Total height of 51’ including truck loading area.

Each bin utilizes a live bottom to deliver biosolids cake to the trucks below. The live bottoms are center discharging.

  • Bin Live Bottom Details (each): 18” diameter shafted, Twin Screws. Complete with 36” x 36” pneumatically actuated slide gates to control cake fill.

 

The top of the bins extend through the roof of the truck loading building. The bins provide storage capacity for dewatered cake and can fill trucks in less than 15 minutes when needed. The systems came complete with access ladders, safety railing, and ventilation connections for odor control. The bins have been in operation for nearly a decade, requiring only regular upkeep and maintenance to bearings and drive systems.

 

Click here to read more about our Products, then contact us to learn more about this project or find out how we can help your plant too.

 

Read Part One: Cake Pumping

Stay Tuned for More on Pima County Projects:

Part Three: Temporary Screw Press Dewatering

Part Four: NuReSys Struvite Management Project

 

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Tags: Biosolids, Wastewater Treatment, Water Reclamation Facility, Live Bottom Bins

The Maine Solution

 

When an upgrade to the biosolids dewatering component at the Westbrook/Gorham Regional WWTP was needed, a screw press has helped the facility dramatically reduce their sludge hauling/handling costs.

Written by Larry Trojak, Trojak Communications

Version also published in WaterWorld, June 2020

 

Schwing Bioset Dewatering Screw Press

 

When an upgrade to the biosolids dewatering component at the Westbrook/Gorham Regional WWTP was needed, plant personnel looked at several different available technologies. Handling secondary sludge alone is challenging, and after an extensive trial and evaluated bid process, they opted for a screw press from Schwing Bioset, Inc. Today, sludge leaving the plant is averaging just above 20 percent solids, and the Westbrook/Gorham Regional WWTP has dramatically reduced costs associated with hauling and landfilling their material. Are they pleased? To quote the locals: “Ayuh.”

 

Diversity in the District

The Portland, Me., Water District (PWD) manages its wastewater treatment through four facilities: East End, the largest plant in the state, which handles wastewater for the Portland metro and surrounding areas; Westbrook/Gorham Regional WWTP, which serves Westbrook, Gorham and a portion of Windham; Cape Elizabeth, which handles wastewater from 3,100 residents in the southern part of the town of Cape Elizabeth; and Peaks Island, which serves 600 island residents — a number that can swell to more than five times that in the summer tourist season. While the Westbrook/Gorham Regional facility is an extended aeration plant, each of the others utilizes a different technology for dealing with their biosolids, according to Steve Picard, the operations foreperson at the plant.

“Within the District, we are certainly varied in our approaches to wastewater treatment,” he said. “East End is a conventional aeration-type plant using clarifiers; Peaks Island is a sequencing batch reactor facility, and Cape Elizabeth is an oxidation ditch plant — they are all similar in many ways but different in others. The Westbrook/Gorham Regional plant was built in 1978. An upgrade to the plant’s aeration system is planned for later in 2020.”

Picard added that three-quarters of the existing plant will be upgraded — a move that will include the addition of new clarifiers mechanisms, a blower facility, and diffused air-type aeration equipment. To show how things have changed, the original plant’s price tag was $14 million; this modification alone is $10 million.

 

Planning Ahead

About two years prior to the plant upgrade, the Portland Water District saw the sludge disposal costs Westbrook was incurring and committed to improving the plant’s dewatering capability. Up until then, the facility, which is rated for 4.54 MGD but treats an average flow of about 3.2 MGD, took sludge from the bottom of the final clarifiers, pumped it to a gravity belt thickener where it was thickened to approximately 4 percent solids, and sent it to a 2.5 meter belt press.

“On a good day, that belt press would give us maybe 17–18 percent solids,” said Picard. “Unfortunately, because we deal strictly with an inflow of secondary sludge here at Westbrook, there weren’t many of those good days. To make matters worse, because we were sending that sludge to a trailer for transport to a landfill about three hours away, we were paying to haul a lot of water that didn’t need to be there. That had to change.”

For Schwing Bioset, finding out about the project was a classic case of being in the right place at the right time. For nearly 30 years, Westbrook has been using a Schwing Bioset KSP 10 piston pump to move sludge from the belt press out to the trailers — a distance of more than 70 feet. Word that they were actively seeking equipment to enhance their dewatering effort got the attention of a technician who happened to be on site.

“When I mentioned that we were about to go out to bid for dewatering equipment, the tech said that Schwing Bioset also made a screw press that could be a good fit,” said Picard. “He went back, told his people, and they were suddenly in the running for the bid along with several other manufacturers. Their timing couldn’t have been better.”

 

Natural Solution

After extensive testing of four manufacturers’ products and a competitive bid process, PWD selected an FSP 1003 screw press from Schwing Bioset.

“Because we already had the piston pump and power pack from Schwing Bioset, we thought that having a screw press from the same manufacturer — a company that we were already very satisfied with — could only work to our advantage,” said Picard. “However, they also outperformed the others we tested and were within our budget, so we felt confident that we’d made a good decision.”

Features that helped make the case for Westbrook included the unit’s low-speed operation — which enhances its lifespan — and automated control. Ease of regular maintenance was also key, including a split screen casing to simplify access for any maintenance activities such as replacing the sealing lip and eventually the screens. Both items can be replaced without having to remove the screw.

“In addition, because the entire operation is now enclosed, all the odor associated with dewatering is contained,” said Picard. “And finally, we liked the fact that the Bioset press could be cleaned while in use, so the dewatering operation would not be impacted by it. All these played a role in our decision.”

 

Getting the Numbers Up

Once the new press was in place (the installation was completed by the same contractor that handled their belt press 28 years ago), Picard and his team were initially stymied trying to find the polymer that would give them the numbers they were anticipating. Using the same product they ran with the belt press resulted in no change: solids in the 17 percent range.

“We suspected that was because, unlike the screw press, the belt press had little to no agitation to it and it held the floc together easily,” he said. “However, by the time we tested our fourth polymer, we started getting solids numbers up in the 19–20 percent range. Connecting the screw press to the polymer injection system we had used with the belt press — then adding two more injection points — got us a bit closer.”

In addition to polymer optimization, there was a period of learning how the new system could be successfully operated at the plant. Doing minor adjustments to the injection system prior to running the screw press for several days without making any changes allowed workers at the plant to verify what worked and what didn’t.

“We were closely tracking our polymer feed rate and the cake coming out of the system and, when we started to break 20 percent solids, knew we were on to something,” Picard said. “We learned that, where the polymer is injected into the system is hugely important. Here, in an area one level down from the press, the polymer goes into a check valve which gives it a good primary mix with the sludge, then comes up and into a huge reaction tank equipped with a variable speed mixer. Using that configuration, the difference was impressive: the 2.5–3 percent feed rate at which we used to feed the belt press didn’t even tax the screw press. Instead, we found out the screw press runs great at 4–4.5 percent, which was a nice plus for us.”

 

Biosolids  Westbrook Wastewater Treatment Plant

 

The Better Choice

With their tweaks in place, Picard and his team at Westbrook saw a continued uptick to the point where they’ve averaged just over 20 percent solids out of the screw press for just over a year now and have seen that number climb as high as 22.5 percent or 24 percent on some days. That has resulted in a net savings — even with added polymer costs factored in — of about $40,000 annually. To the uninitiated, an increase in solids of up to 5.5 percent might not seem substantial. However, that number still represents a 25 percent increase in performance.

And, said Picard, context is key.

“The difference between the two processes is particularly significant when you remember that we are dealing with a straight secondary sludge which is very hard to dewater,” he said. “Even Schwing Bioset rated the screw press at only 19–20 percent under these conditions.

 

Anticipating Change

Today, Westbrook is producing about 30 tons of a better dewatered product every day they dewater during their five-day-a-week operation. By reducing the amount of water in each load, the three-hour trip to the landfill for disposal is far more cost-effective.

“Disposal for us is a costly operation and the Schwing Bioset press has helped significantly knock down those costs,” said Picard. “In addition, there was a good deal of belt spraying, wash water, etc., associated with the previous process, resulting in a constant mist in the air. The place was continually wet where today, things are clean and dry.

He adds that, throughout this conversion process, PWD leadership was outstanding in working with them — giving them support and encouragement all along the way.

“On that note, when we did the screw press install, we kept the belt press here for a year as a backup in case the Bioset didn’t work,” said Picard. “Eventually that belt press was sold for scrap — I guess that says it all.” 

 

Click here to read more about our Products, then contact us to learn more about this project or find out how we can help your plant too.

 

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Tags: Biosolids, Screw Press, Dewatering, Wastewater Treatment Plant

Pima County, AZ, Tres Rios WRF Biosolids System Upgrades - Part One: Cake Pumping

 

Written by Josh DiValentino

 

Tres Rios Storage w-caption 2Background: The district of Pima County, AZ, operates a total of eight wastewater treatment plants. The Tres Rios Water Reclamation Facility (WRF) is the centralized biosolids processing facility for all Pima County plants. Tres Rios WRF currently operates 24/7/365 at a 30 MGD capacity, with a projected flow of 50 MGD in 2030. The facility process is; BNR, Anaerobic Digestion, Dewatering, Pumping, Truck Loading, and Land Application of biosolids (cotton is common use). For nearly 20 years, Schwing Bioset, Inc. has provided solids handling solutions at Tres Rios with projects ranging from biosolids cake pumping and cake storage bins, to most recently, nutrient recovery and temporary Screw Press dewatering equipment.

 

Cake Pumping:  Since the early 2000’s to 2012, the Tres Rios WRF had used a piston pump for biosolids cake conveyance to truck loading. In 2012, the facility completed a Regional Optimization Master Plan expansion, which included an upgrade to the centrifuge building and loading building. The upgrade design replaced the existing piston pump with progressive cavity pumps dedicated to each of the three new centrifuges.

After 6 years of struggling with excessive downtime associated with the progressive cavity pumps, the 10+ year-old piston pump was pulled from storage, sent to Schwing Bioset, Inc. to be rebuilt and reconfigured to fit the existing building, and installed to replace one of the progressive cavity pumps.

Since its reinstallation, the plant has used the piston pump as its primary pump, reducing the downtime and maintenance costs associated with the progressive cavity pumps. The facility no longer needs to de-rate the centrifuges and has been able to dewater the biosolids to a higher percent solids content when using the piston pump, significantly reducing hauling costs. The subsequent uptime and increase in dry cake solids production justified the capital cost of buying an additional Piston Pump, as the payback was determined to be 2 years. One progressive cavity pump will remain in service as an emergency backup for pumping thickened sludge, which is usually thickened from 6% to 8% solids.

The second new Piston Pump will come online in 2020. The Schwing Bioset, Inc. Engineering Team also worked with the district to perform a complete pipeline analysis of the existing cake pipeline. This identified the pipeline upgrades required to re-certify the pipeline for higher pumping pressures, resulting from higher cake solids and higher flow via the Piston Pumps to Truck Loading. This pump technology conversion clearly illustrates that while the initial capital expense of a piston pump is higher than a progressive cavity pump, the long-term expenses over the operating life of the equipment, when factoring in hauling expenses, maintenance costs, and operational downtime, heavily favor piston pump technology.

 

Schwing Bioset Piston Pump

 

For more information on this project, read the paper below or contact us.  

 

Additional Info: Biosolids Cake Pumping Life Cycle Analysis - A True Operators Story

Stay Tuned for More on Pima County Projects:

Part Two: Live Bottom Bins

Part Three: Temporary Screw Press Dewatering

Part Four: NuReSys Struvite Management Project

 

 Download Our Brochures    or Application Reports

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Tags: Piston Pumps, Biosolids, Biosolids Piston Pump, Water Reclamation Facility

New Replacement Membrane Bioreactors Benefit Small Community

 

The Manor Water Reclamation Facility owned by Forsythe County located in Milton, GA, consisted of four trains utilizing Zeeweed 500D membrane bioreactors sized for a total of 500,000 gpd of flow. As the system aged, the County decided to replace the old membranes. Half of the existing membranes were replaced with Schwing Bioset’s Econity CF54D membrane bioreactors (MBRs) to process 250,000 gpd of flow. Due to the modular nature of Schwing Bioset’s Econity membranes, an easy, direct “in-kind” replacement of the old membranes was possible.

In the operator’s words regarding the retrofit, “the replacement was a breeze,” simply making pipe flange and hose connections. During replacement activities it was found that the existing membranes were fouled with debris, which revealed another advantage of the Schwing Bioset Econity membrane design.

Schwing Bioset’s Econity membranes are manufactured with an “end free” fiber (potted on bottom only) that eliminates fouling issues associated with membrane designs using top and bottom potting of the membrane fibers.

The Schwing Bioset Econity design is such that the fibers are contained in modular “cartridges” that are assembled into “cassettes” of more than one cartridge within a frame support. Unlike the existing MBR frames, the Schwing Bioset Econity frame is designed as a self-supporting structure. 

This modular design greatly simplifies installation and removal when necessary as the cassettes can be removed by a single operator in a couple hours, unlike the original equipment which required multiple staff members and a full day.

 

New MBR at Manor WRF   New Membrane Bioreactor at Manor Water Reclamation Facility

 

Based on the foregoing comparison, the following conclusions can be drawn about the Schwing Bioset Econity Membranes:

1. The modular design allows customization to fit virtually any basin shape or size.

2. The end free design solves the recurring problems of solids build up at the ends of the membrane fiber. The  membranes are not prone to fiber breakage and deterioration of effluent quality.

3. The construction is easier to maintain.

4. The end-free membrane design allows for more vigorous movement of the fibers requiring up to 40% lower air scour compared to the competitor.

5. The new MBR's have helped the community update its tertiary treatment system that treats sewage to re-use quality.

The advantages of Schwing Bioset Econity membranes are easily recognized by customers. It is for this reason that there well over 2000 installations world-wide.

 

Check out these photos of the old clogged membranes that were replaced!

Old MBR at Manor Water Reclamation Facility  Old Membrane Bioreactor at Manor WRF

 

To learn more about Schwing Bioset’s MBR systems, visit our website here or contact our Regional Manager closest to you.

 

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Tags: Wastewater Treatment, Membrane Bioreactor