Upflow Anaerobic Sludge Blanket (uasb) Reactor in Wastewater Treatment
نویسنده
چکیده
Under anaerobic conditions, organic pollutants in wastewater are degraded by microbes producing methane and carbon dioxide. The degradation process is effective compared to the more conventional aerobic processes and produces only 5-10% of sludge. This saves considerably on cost associated with the sludge disposal. Among anaerobic technologies, the most popular ones is the upflow anaerobic sludge blanket (UASB). In the UASB process, the waste to be treated is introduced in the bottom of the reactor. The wastewater flows upward through a sludge blanket composed of biologically formed granules or particles. Treatment occurs as the waste comes in contact with the granules. Among the main applications for UASB are in the beverage, brewery, food and tannery industries. Case studies of UASB applications in treatment of distillery spent wash, treatment of effluent from vegetable tannery and treatment of newsprint paper industry are given.
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