News from Schwing Bioset

USEPA PEC Committee Grants PFRP Approval to the Bioset System

The USEPA PEC Committee Grants Nationwide PFRP Approval to Schwing Bioset and Its Class 'A' Biosolids Process known as the Bioset System

After extensive testing and research, Schwing Bioset is proud to announce that the USEPA has given nationwide approval to the Bioset Process to reduce its operating temperatures from 70°C (158°F) to 55°C (131°F) as a Process to Further Reduce Pathogens (PFRP). Operating at 55°C (131°F) results in a greater than 20% reduction in operating costs for owners of the Bioset process.

Somerset, WI 2011

After extensive testing and research, Schwing Bioset is proud to announce that the USEPA has given nationwide approval to the Bioset Process to reduce its operating temperatures from 70°C (158°F) to 55°C (131°F) as a Process to Further Reduce Pathogens (PFRP). Operating at 55°C (131°F) results in a greater than 20% reduction in operating costs for owners of the Bioset process. Prior to receiving nationwide approval, site-specific approval at one site in Texas had been granted.

The Schwing Bioset Process is a technology that continuously converts municipal biosolids into a Class A/EQ saleable product in full compliance with 40 CFR Part 503 Rule. The process mixes dewatered biosolids with calcium oxide (quicklime) and sulfamic acid (solid granular acid) and continuously pumps it into a plug flow reactor. The Schwing Bioset Process currently meets Class ‘A’ standards via pasteurization at 70°C for 30 minutes, and vector attraction reduction by maintaining an elevated pH.

At the elevated pH levels, ammonium contained within the biosolids evolves as ammonia, and the ammonia is maintained in solution with the biosolids in the pressurized plug flow reactor. Miscible contact of the ammonia with the biosolids enhances pathogen destruction to Class A/EQ standards at lower temperatures. Mixing is accomplished with Schwing Bioset’s twin-screw feeder and the blended material is pumped into the plug flow reactor with Schwing Bioset’s twin- cylinder positive displacement piston pump.

The combination of high temperature, high pH and the biocidal effects of ammonia ensure that the biosolids are pathogen free in accordance with Class A/EQ requirements. The end product is characterized as a lime enhanced soil amendment and is a valuable product for numerous land application markets. Because the Calcium in the Class A/EQ end product is readily available, soil pH adjustment occurs in less than half the time of what typical agricultural lime products require. An additional benefit of the end product is that the high percentage of organic content (35-55%) returns organic material to depleted soils.


Tags: Class 'A' Biosolids, Piston Pumps, Bioset System, Municipal Biosolids, Class 'A' Materials, Screw Feeders, Biosolids

Schwing Bioset 2012 KSP Service Seminar

May 2012

KSP 2012 Service Seminar

Schwing Bioset is proud to announce the dates for our KSP Service Seminar. The seminar will be held on May 7th-11th, 2012. A second class maybe offered on May 14th-18th, depending upon demand.

Get the most out of your equipment. Attend the Schwing Bioset Service Seminar and receive the best training in the industry. With both classroom and hands-on instruction you will learn how to properly use and maintain your equipment. The classroom portion of the seminar is held in our training center with working models and cut-a ways of components. Our hands-on facility features several pieces of working equipment students can interact with.

The cost for the seminar is $1195.00 USD. The fees do not include airfare, ground transportation to or from the airport, lodging or evening meals. Payment must be received prior to enrollment.

Click to download the registration form!


KSP Service Seminar

Tags: Sludge Pumps, Class 'A' Materials, KSP Service Seminar, Poppet Valves, Screw Feeders, Hydraulic Pumps

Schwing Bioset Receives EPA Approval

Schwing Bioset's "Bioset" Process was approved by the Environmental Protection Agency (EPA) as a Process to Further Reduce Pathogens under certain conditions, which can be found in the attached document.

Tags: Class 'A' Biosolids, Bioset Process, Class 'A' Materials, EPA, Wastewater Treatment

SBI Installs New Beneficial Reuse Bioset System in Northern Minn.


Schwing Bioset Announces New Beneficial Reuse Bioset System Installation in Northern Minnesota

The Bioset System will enable the Coleraine/Bovey/Taconite Joint Wastewater Commission to produce a soil amendment that meets the USEPA Class 'A' standards year round

Itasca County, MN- In Q3 of 2009 Schwing Bioset was awarded the contract to provide a Bioset System to the Coleraine/Bovey/Taconite Joint Wastewater Commission. This system was the lowest cost when compared to other technologies, and it produces a USEPA Class ‘A’ end product, unlike the other technologies that produced a USEPA Class ‘B’ material. The installation was completed in Q2 of 2011 and is fully operational.

The existing digesters could not meet the USEPA Class B standards in the winter months so the Commission needed to find a solution. After a reasonable amount of due diligence, the Commission secured the services of a local consulting engineering firm to explore alternatives for meeting the USEPA standards year round.

The engineer was faced with several challenges as they began their investigation. The plant was small, processing 0.5 MGD, and most available technologies would not scale down well or work well with intermittent biosolids processing. Another challenge was related to protracted winters and the need to find a place to store Class ‘B’ materials until the ground thawed and the biosolids could be land applied on the Commissions’ hay fields.

After considering options of a new digester, retrofitting the existing digester with heat exchangers, and reed beds, ultimately the Bioset process, Schwing Bioset’s alkaline stabilization process, was selected as the best available technology to meet these challenges.

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.



Tags: Biosolids Processing, Bioset Process, Alkaline Stabilization, Class 'A' Materials, Biosolids, Wastewater Treatment

Can your Waterbed Create Class A Material?

If you were to visit a plant using fluid bed technology, you might be expecting a warehouse full of waterbeds. You'd be wrong, of course. But what you would find is nothing short of engineering wizardry.

Schwing Bioset engineers, manufactures and installs advanced technology that can be used to process sewage and biosolids into valuable Class A material. Fluid bed technology, a hallmark of Bioset's process, works with biosolids in a way that is multifunctional, ultra-efficient and even environmentally friendly.

Fluid bed technology can be applied to biosolids in a number of ways: drying, cooling, conditioning, classifying, and solvent removal and recovery are just a few of the possible applications.

fluid bed dryer

Fluid beds have numerous advantages over comparable technologies. The fluid bed drying system uses high thermal energy efficiency, which allows maximum performance at minimum temperatures. Because the temperatures are so low, drying biosolids using a fluid bed is extremely safe-not only for operators, but also for the environment. Furthermore, fluid beds self-cleaning, and everything in a fluid bed system is contained, so dust is limited as well.

Fluid bed processing allows for reduced consumption of energy and utilities, but doesn't sacrifice an ounce of performance. With a fluid bed, drying, cooling and/or conditioning steps can be combined in one unit. If space is still a concern, a fluid bed is worth considering: this entire system requires minimal space for installation compared with other processing technologies, and it contains minimal internal parts-and very few moving parts-as well. Finally, the process can be completely automated and even operated unattended.

Ultimately, fluid bed technology carries numerous benefits while still resulting in improved quality and consistency for the end product. If you're interested in learning more about fluid bed technology, contact Schwing Bioset today.

Tags: Fluid Bed Drying, Class 'A' Materials, Biosolids, Wastewater Treatment