Kinetics on Anaerobic Digestion and Wastewater Treatment of Chicken Slaughterhouse

Abstract

The kinetics of anaerobic mixed culture treatment of chicken slaughterhouse
wastewater was investigated in this research. Experiments were conducted in the serum
bottle containing 90 ml of chicken slaughterhouse wastewater including 10 ml sludge
(2,000 mg/l mixed liquor volatile suspended solids, MLVSS) from upflow anaerobic
sludge blanket (UASB) system. The bottles were operated in anaerobic condition with
the chicken slaughterhouse wastewater at various chemical oxygen demand (COD)
concentrations of 400, 800, 1200 and 1600 mg/l at pH 7.00±0.02. The serum bottles
were incubated for 30 days at 37±1 °C without shaking. Based on the data, the order
kinetics of the reaction were found in different COD concentrations of organic matter
in chicken slaughterhouse wastewater treatment. The reaction order in the degradation
of higher COD concentrations (800, 1200 and 1600 mg/l) of chicken slaughterhouse
wastewater treatment is a fit for first order kinetic model. On the other hand, the COD
degradation of the anaerobic treatment of chicken slaughterhouse wastewater at low
COD concentration (400 mg/l) appeared to be close to the second order. The increasing
of COD and color removal efficiencies of the slaughterhouse wastewater treatment
was observed with a greater concentration of COD. The maximum COD and color
removal efficiencies (90.40 and 48.96%, respectively) were found at the 1600 mg
COD/l. Moreover, the biogas production increased with an increase in COD
concentration of the wastewater and incubation time. The highest biogas production
reached was 267.0 ml biogas volume (64.03% CH4) with wastewater treatment of
COD concentration at 1600 mg/l for 30 days.