Biological Removal of Organic and TKN Using Anaerobic Baffled Reactor (ABR) Treating Swine Wastewater
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Date
2010-04-04
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Journal of Public Health
Abstract
Swine wastewater usually contains a high concentration of organic and nutrients, especially nitrogen. Conventional anaerobic treatment is not able to remove TKN from the wastewater. Therefore, the present study modified the anaerobic baffled reactor (ABR) in order to simultaneously remove organic and TKN from swine wastewater. The ABR reactor used in this study had an effective volume of 10 liters with 8 compartments. The feed was synthesized from dry swine waste, diluted with tap water, to obtain COD concentration of 4,000 mg/l and TKN of 400 mg/l. Two experiments were conducted anaerobically, but one (named as ABR-1) was aerated in the sixth compartment, and another (named as ABR-2) in the seventh compartment, without sludge or nitrate recycle. The results showed that aeration only in one of eight compartments of the reactor was able to remove TKN with an efficiency of not less than 50 percent and COD with an efficiency of more than 90 percent. In addition, aeration in either the sixth or the seventh compartment did not affect the COD and TKN removal efficiencies significantly. Moreover, this ABR reactor could retain sludge remarkably well and produce low SS effluent.
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Journal of Public Health; Vol.38 No.1 January-April 2008; 82-91