Bioremediation
A paper mill wastewater facility was treating 940 tons of paper bags, recycled linerboard, and corrugating medium, daily. The mill was interested in improving wastewater operating efficiency and lowering operating expenses over their standard polymer usage. The plant was experiencing filamentous bacteria, solids, and bulking issues in the final clarifier. It was discharging 4,000 pounds of fiber per day into the Ohio river. Read more about reducing cost and turbidity
A citrus plant struggled with poor settling in the clarifier of its wastewater treatment, which caused the sludge blanket to remain high. Even at a low flow rate of 1.2 million gallons per day (MGD), the high sludge blanked allowed less than 18” of free board. The slightest flow increase caused solids to carry over the weir with the effluent. Since the citrus plant frequently produced wastewater flows 1.5 to 2.5 MGD, the wastewater treatment plant continued to suffer from solids washout and clarifier effluent total suspended solids (TSS) excursions. The citrus plant wastewater treatment was a 6 million gallon per day (MGD) traditional aeration system with secondary clarification.
Read more about improving SVI
Within a few months of operation, a lagoon and spray field system at a corn processing plant in Indiana began giving off offensive odors. Chemical oxygen demand (COD) levels in the anaerobic and aerobic lagoons climbed to 8,000 mg/L and 4,000 mg/L respectively. The pH in the anaerobic lagoon was dropping dangerously low for methane production. Attempts to resolve the issues with bacteria, odor masking products, and lime were unsuccessful and short-term at best. Lime settled to the bottom of the lagoons, temporarily raising pH and reducing odors. The odor soon became unmanageable and an annoyance to neighbors.
Read more about odor reduction
A plastic manufacturer in Taiwan needed a new process to efficiently treat elevated incoming chemical oxygen demand (COD) to comply with stringent EPA regulations for effluent discharge. The plant is an activated sludge treatment system with an influent of approximately 2,000 cubic meters per day (CMD) which is equivalent to approximately 530,000 gallons per day (GPD). The plant was unable to bring the plant into compliance using alternative technologies.
Read more about treating elevated COD
Location: Louisiana
A large sugar refinery struggled with elevated BOD and COD values in its wastewater treatment lagoons due to the sugar refinery process. The lagoon wastewater system capacity was 25 million gallons with an influent of 1.25 million gallons per day. The wastewater system also suffered from accumulating sludge as well as significant odor issues. The sugar refinery had a history of periodically being unable to meet its National Pollutant Discharge Elimination System (NPDES) permitting requirements. Continue reading
The wastewater treatment plant superintendent for a rural Colorado town of about 500 people noticed that the plant’s three wastewater lagoons were filling with sludge, but he was dealing with budget constraints. The town’s population fluctuates throughout the year, and the varied loading was affecting system performance. Continue reading
A small Missouri Sewer District operated a single wastewater lagoon that treated approximately 10,000 gallons per day of municipal sewage. The lagoon was in need of sludge removal as it had not been dredged since it was constructed in the ‘70s. By treating the lagoon with Bio Energizer®, the District saw improvement in water clarity, a reduction in odors, and a drastic reduction of accumulated solids. Continue reading
A small town in Illinois (pop. 3,500) had a municipal wastewater system that was in need of sludge removal. The sludge accumulation problem had become so problematic that the sludge was visible at the surface. The exposed sludge was causing an odor problem for the nearby residents. In addition, due to the high solids accumulation, the BOD values were higher than the State’s acceptable range. Something had to be done at a cost that the town could afford. Continue reading
A small town in New Mexico (pop. 1,300) had a municipal wastewater system with a flow rate of 50,000 gallons per day. The system included a series of three lagoons. A recent sludge judge showed Pond 1 had an average sludge depth of 1.9 feet, Pond 2 averaged 3.5 feet, and Pond 3 averaged 2.7 feet. The system was in need of reducing the sludge in its lagoon wastewater system to meet state requirements. Continue reading
A small municipality in Utah (pop. 1,800) had a wastewater system with a flow rate of 192,000 gallons per day. The system included a series of four lagoons, although at this time only Ponds 1 and 2 were being evaluated for treatment.
The influent consisted of domestic waste as well as septic. Pond 1 was specifically being addressed due to a State mandate. A sludge judge was performed which showed Pond 1 had an average sludge depth of 2.7 feet and Pond 2 averaged 1.9 feet. Two years later surfacing sludge prevented a sludge judge from being performed. Continue reading
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