BioRem© GT

BioRem© HC

E.C.C.F

Client Category:

Hydrocarbon impacted wastewater treatment plant.

Location:

Los Angeles, CA

Physical plant:

Physical plant: Four 500,000 gallon clarifiers, a two stage 40,00 gallon flocculation/aeration collection tank and a 2,000,000 gallon lagoon.

Capacity:

Apx. 1,000,000 gallons of oily wastewater are generated each day. Retention time is 4-7 days.

Problem:

County surcharges for excess COD and TSS amount to $446,000 per year, VOC's offensive to adjacent neighbors.

Previous Treatment:

Use polymers injected into the headworks.

Custom Treatment:

A total of 165 gallons of BioRem® HC were initially spiked into the system at the headworks. Four microbe dispensing units (MDU's) were placed throughout the system injecting 22 gallons of product each day for the first week. The following weeks 6 gallons were injected daily.

Custom Results:

Client Category:

Food Market

Location:

State of Maine

Physical Plant:

Grocery Store with 1,000 gallon septic tank

Problem:

Market is located 250 feet from lake, unknowingly the leach field had failed and was discharging directly into the lake. Local code officers on routine inspections with a die test found the die going from the building into the lake. Cease and Desist orders were issued and pumping began on a demand basis.

Biological Treatment:

BioRem® Septic Tank Bacteria was pumped into the field daily beginning in September of 1991, along with nutrients to increase the feeding of bacteria.

Biological Results:

In the month of May, 1992 the field opened up and took water, pumping ceased and Code Enforcement certified the field operational. A preventative maintenance program is in place and on going.

Client Category:

Hardware Store and Deli Restaurant in Mini-Mini Mall

Location:

Massachusetts

Physical Plant:

Small leaching field for Hardware Store and Software Distribution Store. Software Store replaced by Deli Restaurant.

Problem:

24 X 44 Leach Field failed after 5 years of operation with a mat of oil and grease covering a clean sand and stone bed.

Previous Treatment:

None except pumping.

Biological Treatment:

BioRem© ST Bacteria introduced to the field on a daily basis. BioRem© GT Bacteria was installed in the restaurant as a pretreatment for the grease and oil.

Biological Results:

After three months of treatment the mat of grease and oil over the leach field was gone, eaten by the bacteria. Water was accepted and pumping eliminated.

The pretreatment restaurant program remains in effect as does a monthly dosage of BioRem© ST (16 ounces) applied by the owner.

A Southboro, Massachusetts corporation processes precooked meats, sausages, hamburger, hams, etc. for industrial needs. The plant is located in a rural area that is not serviced by a municipal sewage system. The company, over the course of many years, has gone from direct discharge of its wastewater to settling and biological treatment prior to discharge to the leaching field. A leaching field was constructed to receive the wastewater. The system worked in the following fashion:

1. There were 13 preliminary grease traps
2. Wastewater collection and grease floatation
3. Grease and scum removal and course screening
4. Bacteria injection and aeration
5. Secondary setting
6. Filtration
7. Leaching field

This system removed approximately 50% of the waste load when operating under optimum conditions. During the winter months, biological activity decreased and removal rates were much less. The result of operation of this system was the fouling of the leachate beds with grease and protein. The beds were constructed for $200.000., and the estimate for rehabilitation is $250,000. The seven year life of the beds led the corporation to investigate different methods of wastewater treatment. A filtration system was incorporated and proved totally ineffective. Extending the process time for biological system was initiated. This led to a $400. a week electric bill just for the aerator system.

Caldwell Environmental became involved and pilot plant studies proved an "electrochemical coagulation flotation" (ECCF) would clean the wastewater to the extent that the present non-rehabilitated leaching beds would work efficiently. A contract was signed and the treatment facility went on-line. The plant processes 15,000 to 20,000 gallons of wastewater per day. Only one tank of the original wastewater treatment plant was incorporated into the new design. No new tanks or systems were installed other than the ECCF system. Eliminated from the treatment plant were:

1. Tanks designed to retain water for days
2. The aeration system
3. The filtration system

The 15,000 gallons per day of wastewater that previously took four days to treat now is discharged in four to five hours.

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