By Heather Jennings, PE Industrial pulp and paper wastewater is considered one of the more challenging waters to treat using biological methods, which depend on microbial activity to effectively remediate the wastewater. Wastewater treatment systems are often influenced/impacted by increased hydraulic and/or COD (chemical oxygen demand) loading as mills add new chemicals or otherwise modify
Each year a summer camp in Utah becomes inundated with campers. The camp’s wastewater treatment plant goes dormant during the winter months with only occasional flows. The biomass becomes very inactive and in years past became overloaded and upset when the high organic load arrived at the plant at the beginning of the camping season.
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
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
Paper Mill Wastewater Treatment System Project Summary A paper mill wastewater treatment facility uses diammonium phosphate to maintain a healthy microbial population. These microorganisms, which break down the organic matter, require the correct concentration of available phosphorus, without which the microorganisms are unable to grow and reproduce. Continue reading.
Full Case Study Introduction: A remediation company in Arizona was selected to complete a Remedial Action Plan for soils contaminated with crude oil located in an oil production field in Texas. The crude oil contaminated soil was generated from storage tank bottom materials which had been removed from several oil recovery storage tank batteries located
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
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
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,
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,
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