Manufacturing activities at Army Ammunition Plants ( A A P s ) result in the pro CDNT and 2, respectively). The studies concluded that removal of explosives from groundwater using continuous flow GAC is feasible.

Development of a new product at a pharmaceutical plant would result in additional wastewater, including some low-volume, high strength process wastewaters. At full production capacity, the organic loading from the additional 100,000 gallons per day (gpd) of process wastewater (three waste streams, and an allowance for bad batch flows) would exceed 40,000 pounds chemical oxygen demand (COD) per day. This additional organic loading was greater than the capacity of the nearby wastewater treatment plant (WWTP) where the pharmaceutical plant currently discharges its existing wastewaters. The additional wastewater would require extensive pretreatment to be discharged to the nearby WWTP. The pretreatment system had to be available in twelve months as production of the new product was to begin in one year. This paper presents the results of the bench/pilot testing performed on the process wastewater, design of the pretreatment system, and the start-up and initial performance of the pretreatment system. Descriptions are provided for unique features of the design, the chemical treatment system and the ultrafilter.

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An industrial biological wastewater treatment plant for a specialty chemical manufacturing facility needed to be upgraded in order to meet new more stringent effluent discharge requirements. It was determined that effluent total suspended solids (TSS) was the key parameter that needed to be addressed as part of an upgrade effort. The plant's activated sludge system had a tendency to periodically produce high levels (around 200 mg/L) of dispersed TSS, which resisted flocculation. It was determined that this effluent TSS was primarily active biomass with poor flocculation characteristics. An extensive engineering effort was performed to assess options. Options included assessing the impact of operational improvements (use of flocculants, etc.) as well as the implementation of capital modifications. After completing the engineering effort, it was concluded that converting the activated sludge system to a membrane bioreactor (MBR) presented the most attractive upgrade alternative. Key reasons for this selection include the fact that the system will provide superior performance characteristics in this treatment situation for the addressing the effluent TSS issue. There are also several other benefits to plant operation that are detailed in the paper. KEYWORDS Industrial biological wastewater treatment, MBR Technology BACKGROUND