Problem:
A wastewater treatment plant with a daily flow rate of 700,000 was experiencing bad odor problems, poor degradation of waste, oil and grease, gray water in the aeration tanks, black foam, and poor settling in the clarifiers.

Solution:
Histosol OP-Bio was added at the head of the plant. After one week the water in the aeration tanks had changed to a light brown and there was a light tan foam on the tanks. The settling in the clarifiers was greatly increased and 98% of the odor was eliminated.

This facility also has several large aerobic digesters and their sludge is processed across a belt press and put into a roll-off container for disposal at a local landfill. Prior to the use of Histosol OP-Bio, 30,000 gallons of sludge was processed to fill each roll-off container. The facility is now able to process 60,000 of sludge per roll-off container.

Conclusion:
Histosol OP-Bio virtually eliminated the odor problem at the WWTP. Through improved degradation and settling Histosol OP-Bio has increased the efficiency of the plant belt press operation by 100%

 

Case Study Fourteen
Hydrogen Sulfide Reduction - Limestone Rock Quarry Application

Problem: 
A seventy- year old rock quarry site was receiving numerous complaints from local businesses concerning odors being generated by the quarry. The quarry was producing H2S levels as high as 154 PPM and attempts had been made in the past to mask the odors with fragrances, but the effectiveness of the masking agents were minimal at best.

Solution:
Histosol OP-Bio was added to the 2nd retention basin located on the first level of the quarry. The basins capacity is 25,000 gallons, and the daily flow rate through the basin is approximately 500,000 gallons per day. The basin was charged (shocked) with 25 gallons of Histosol OP-Bio. A metering pump was installed and the daily application rate was set at 25 gallons per day.

Conclusion:
Within 24 hours of the initial application of the Histosol OP-Bio product the H2S levels were reduced to 22 PPM. Complaints from local businesses have ceased. The quarry continues to apply the product on a daily basis.\