Sequencing Batch Reactor: A Promising Technology in Domestic Wastewater Treatment

Sewage is the combination of water and waste products, the waste products can be organic and/or inorganic in nature so some sort of treatment is required before discharging them in to different sinks so that they don't cause any water bone diseases. There are many kinds of treatment scheme given for the treatment of sewage out of them the most common is ASP. Conventional ASP system are space oriented, where wastewater flow moves from one tank into the next on a continuous basis and virtually all tanks have a predetermined liquid volume. The SBR on the other hand is a time-oriented system, with flow energy input and tank volume varying according to some predetermined, periodic operating strategy. Hence SBR is best defined as a time oriented batch process. Further ASP is not designed to remove nitrogen due to its short detention time and the sludge produced is not well digested requiring additional sludge treatment. Comparing with ASP, SBR is a simple fill and draw treatment system having the advantage of flexibility of operation and can be used as low-energy high sludge yield process. This paper reviews the fundamentals of SBR and ASP process, design concept, operational and maintenance problem with a case studied for 10 MLD.