ABSTRACT
Bench-scale reactors are commonly used to assess the treatability of wastewater by determining treatment efficiencies and process coefficients under controlled conditions. The pH ranges were also quite acceptable throughout the study and did not have any impact on differences of biological treatability among the waste categories. A bench-scale activated sludge wastewater treatment study was conducted to determine the biological treatability of the industrial wastewater and waste machine tool coolants generated at John Deere Dubuque Works. To determine the feasibility of biologically treating the industrial wastewater and spent machine tool coolants, a biological treatment study was conducted. A continuous flow activated sludge system can be used to further treat the Dubuque Works chemically treated industrial wastewater to obtain a low effluent Biochemical oxygen demand5 concentration. Documentation of feed rates, operating parameter values, and environmental conditions provided general guidelines for the design and operation of an extended aeration activated sludge system for treating the waste categories.
