News from Schwing Bioset

Sliding Frame Silos Help Treatment Plant Produce More of a Good Thing

 

Written by Eric Wanstrom, December 1, 2016

Ocean County Utilities Agency (OCUA) had been producing OCEANGRO fertilizer with Biosolids from their Central Treatment Plant with great success.  Currently, every bag of OCEANGRO produced is sold in the community.  Ocean County looked to increase the production of OCEANGRO to meet the increasing demand by using Biosolids from their North treatment plant.  This posed several challenges though: How would they get the Biosolids into the trucks at the North Plant?  How would they get it out of the trucks at the Central plant?  Once there, how would they blend the stream of the two differing Biosolids to make the uniform blend of material required by their Biosolids dryer? 

Ocean County Pump.jpgSchwing Bioset was able to work with Ocean County to provide a solution to the challenges of loading, receiving, and blending the Biosolids.  Schwing Bioset manufactured a custom designed storage silo with a sliding frame feeder at the North plant, designed to load trucks with Biosolids.  This silo would store the Biosolids and rapidly feed it into the trucks, but first the biosolids would have to get there from the new Belt filter presses, a distance of roughly 300 feet.  So, Schwing Bioset supplied high pressure piston pumps rated for 100 bar line pressure to pump the biosolids from the dewatering collection area to the top of the truck loading silo.

Ocean County Storage Silo.jpg

At the Central plant, there are two sliding frame silos to receive the biosolids coming from the North plant.  The sliding frames easily feed the material to the close-coupled pumps and can even push small rocks and tramp material that might make their way into the trucks or bins.  The silos are equipped with covers to contain odors from the biosolids and are large enough to each receive a full 25-ton truck load of cake.  The two storage silos provide ample capacity, allowing Operators at the Central plant to meter the North biosolids feed with the feed from the Central plant and provide a uniform blend for pressing the OCEANGRO fertilizer.

The silos give Ocean County Utilities exactly what they needed, the ability and the flexibility to process the additional biosolids from the North plant at the rate needed to keep production running smoothly at the Central plant, while accomplishing the goal of increasing the amount of biosolids beneficially re-used as OCEANGRO fertilizer.

To learn more about Sliding Frame capabilities, watch the Sliding Frame video on our website, contact a Schwing Bioset Regional Sales Manager, call 715.247.3433, or email marketing@schwingbioset.com.

For further information on the project, visit this website: http://www.ocua.com/OceanGro/SitePages/Home.aspx  

 

 

 

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Tags: Biosolids Handling, Sliding Frame Silos, Biosolids Storage, Truck Loading

City of Edmonton's WWTP Truck Loading Tribulations

 

Written by Joshua DiValentino, June 27, 2016

The City of Edmonton’s Gold Bar WWTP saw cake storage and transfer to truck loading as a bottleneck in their plant. Current operations included storage of mechanically dewatered sludge in a Schwing Bioset push floor bunker installed in 1999. From there it was pumped to a composting operation where the product is distributed for beneficial use.  Area growth led to biosolids volumes exceeding composter capacity and a screw conveyor bypass was installed from the storage bunker to divert excess biosolids to truck loading for land application.  As biosolids production grew, it became increasingly clear this conveyor bypass was not a long-term solution, as it would take 45 minutes to load a truck.

Edmonton installed a new piston pump in the existing storage bunker to transfer biosolids to two new, 250 cubic yard capacity sliding frame truck loading silos. The silos are capable of storing enough volume of biosolids to seamlessly support plant process flow.  Each has three drop points to load two different styles of trailers, and hanging pendant controls, so the driver does not need to leave his cab during loading operations.

The plant can now easily handle the increased biosolids production and is able to load trailers in less than 15 minutes without requiring repositioning. The system improved process efficiency while minimizing O&M costs, providing more operational uptime for this 24-hour facility.

The Schwing Bioset, Inc. Field Services Team supports start-up and long term parts/maintenance of these systems. To see video of the Sliding Frame System in action or learn more about it, contact a Schwing Bioset Regional Sales Manager, call 715.247.3433, email marketing@schwingbioset.com, and/or visit our Sliding Frame Silos webpage.

Schwing Bioset Sliding Frame Silos    Schwing Bioset Sliding Frame Silos

 

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Tags: Biosolids Handling, Sliding Frame Silos, Biosolids Storage