IMPLEMENTATION OF MBR TECHNOLOGY AT AN INDUSTRIAL BIOLOGICAL WASTEWATER TREATMENT PLANT

摘要

An industrial biological wastewater treatment plant for a specialty chemical manufacturing facilityrnneeded to be upgraded in order to meet new more stringent effluent discharge requirements. It wasrndetermined that effluent total suspended solids (TSS) was the key parameter that needed to bernaddressed as part of an upgrade effort. The plant’s activated sludge system had a tendency tornperiodically produce high levels (around 200 mg/L) of dispersed TSS, which resisted flocculation.rnIt was determined that this effluent TSS was primarily active biomass with poor flocculationrncharacteristics. An extensive engineering effort was performed to assess options. Options includedrnassessing the impact of operational improvements (use of flocculants, etc.) as well as thernimplementation of capital modifications. After completing the engineering effort, it was concludedrnthat converting the activated sludge system to a membrane bioreactor (MBR) presented the mostrnattractive upgrade alternative. Key reasons for this selection include the fact that the system willrnprovide superior performance characteristics in this treatment situation for the addressing therneffluent TSS issue. There are also several other benefits to plant operation that are detailed in thernpaper.