Sludge, BOD and N Reduction - Commercial WWTP

Biological Treatment Summary

The Situation

The owner of a commercial WWTP experienced foaming, excessive sludge and filter clogging on a regular basis. The pond in question was a new 2000 m3 aerated pond with a Hydraulic Retention Time of 5-10 days.

Objective

To utilize BZT® Waste Digester in conjunction with a filtration system to reduce sludge, BOD5 and N concentrations.

The Results

After seasonal treatment with BZT® Waste Digester, the WWTP owner reported great satisfaction with the results.

At season end the pond was dewatered, finding little to no sludge remaining. The filter was designed for daily backwashes to prevent clogging. Normally, this means 120 backwashes in a season. However, BZT® Waste Digester prevented the need for a single backwash all season long.

The owner was prepared for composting or transporting sludge to a sanitary refill, but at the end of treatment the client witnessed complete BOD5 and N removal with zero sludge.