Kinetika Penyisihan Nitrogen Dalam Air Buangan Rumah Potong Hewan Pada Sequencing Batch Reactor Aerob

Abstract

The objective of study was to evaluate performance and kinetic of the treatment ofwastewater from slaughterhouse for nitrogen matter removal by aerobic sequencingbatch reactor (SBR) without pretreatment. SBR is one of the fill and draw versionsof activated sludge process that is operated with cycle. The phases of cycle are fill,react, settle, draw, and idle. The slaughterhouses waste which are from killing,washing, and cutting are similar to domestic sewage in regard to their compositionand effects on receiving bodies of water. However, the organic content and nitro-gen content of these wastes are considerably higher than those of domestic sewag-es. The the best removal efficiency of N-NH4+ is 49,32%, occur on time of react is6 hours. The result of the kinetic analysis are got maximum spesific substrate utili-zation rate 0,1508 hr-1, maximum spesific growth rate 0,0387 hr-1, half-velocityconstant 177,516 mg/l, yield coefficient 0,2216 mg VSS/mg N-NH4+, and deca ycoefficient 0,0019 hr-1. Denitrification which is signed by the decreasing of nitrateconcentration is also occured in this process as a result of the lower DO concentra-tion and also supported by the result of bacteria identification.