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Biological Remediation

ESTR's Biological Remediation System is a large-scale waste water treatment system. It is designed to remediate Biochemical Oxgen Demand(BOD), Total Suspended Solids(TSS), and Total Nitrogen(TN). It employs several components and processes to yield highly treated effluent water. First, the waste water enters an equalization/surge tank where it is mixed using a pump to keep the solids in suspension. It is then pumped into a head works device to remove large objects preventing their entrance into the aerobic digester. To promote active microorganism activity, a nutrient mixture of 100:10:1 will be used for Carbon (BOD) Nitrogen and Phosphorus.
Rectangular DAF
Biological Remediation
Most of the nutrients are used in the digestation process. After a 3-day retention period in the digester, the stream is pumped into a clarification unit where solids are removed. The solids are thickened and hauled off for land spreading. The water stream enters a disinfection phase utilizing ozone and ultra-violet(UV) lights in series to destroy viruses and bacteria. A second pump takes a given flow of the treated waste stream and retuns it to the equalization/surge tank to allow it to return to its anaerobic state and have the bacteria convert the nitrogen(s) into a more useable form (nitrate). Treated water enters a final equalization tank prior to being pumped to either storm water/irrigation ponds or a disposal field.

ESTR's Biological Remediation System has historically produced highly treated water in excess of 99% reduction in BOD and TSS. Typical effluent concentrations from the system are below 20 mg/l for both BOD and TSS and 4 mg/l for total nitrogen. Fecal coliform is normally 99.00 - 99.99% reduced.