Chan Yi Jing, Chong Mei Fong, Law Chung Lim
a Department of Chemical and Environmental Engineering, Faculty of Engineering , The University of Nottingham Malaysia Campus , Semenyih , Selangor , Malaysia.
Environ Technol. 2017 Apr;38(8):1005-1021. doi: 10.1080/09593330.2016.1217053. Epub 2016 Aug 17.
This work presents the evaluation of biokinetic coefficients for a novel integrated anaerobic-aerobic bioreactor (IAAB) at different organic loading rates (OLRs) (10.5-22.5 g COD/L per day) treating palm oil mill effluent. The overall efficiencies of the chemical oxygen demand (COD) and biochemical oxygen demand (BOD) were more than 99% for OLR up to 19.5 g COD/L day with biogas production containing 48-64% of methane. The effluent quality remained stable (BOD < 80 mg/L) and satisfied with the discharge limit. Stover-Kincannon model was the most appropriate model to estimate the performance of anaerobic compartment of IAAB, while Monod model was best suited for describing the aerobic compartment.
BOD: biochemical oxygen demand; COD: chemical oxygen demand; DO: dissolved oxygen; GLSS: gas-liquid-solid separator; MLSS: mixed liquor suspended solid; MLVSS: mixed liquor volatile suspended solid; POME: palm oil mill effluent; RAS: returned activated sludge; SBR: sequencing batch reactor; SVI: sludge volume index; TA: total alkalinity; TN: total nitrogen; TS: total solids; TSS: total suspended solids; UASB: upflow anaerobic sludge blanket; UASFF: upflow anaerobic sludge blanket fixed film; VFA: volatile fatty acid; VSS: volatile suspended solids.
本研究对一种新型厌氧-好氧一体化生物反应器（IAAB）在不同有机负荷率（OLR，10.5 - 22.5 g COD/L/天）下处理棕榈油厂废水的生物动力学系数进行了评估。对于高达19.5 g COD/L/天的OLR，化学需氧量（COD）和生化需氧量（BOD）的总去除效率超过99%，产生的沼气中甲烷含量为48 - 64%。出水水质保持稳定（BOD＜80 mg/L），满足排放限值。Stover-Kincannon模型是估算IAAB厌氧区性能的最合适模型，而Monod模型最适合描述好氧区。
BOD：生化需氧量；COD：化学需氧量；DO：溶解氧；GLSS：气液固分离器；MLSS：混合液悬浮固体；MLVSS：混合液挥发性悬浮固体；POME：棕榈油厂废水；RAS：回流活性污泥；SBR：序批式反应器；SVI：污泥体积指数；TA：总碱度；TN：总氮；TS：总固体；TSS：总悬浮固体；UASB：上流式厌氧污泥床；UASFF：上流式厌氧污泥床固定膜；VFA：挥发性脂肪酸；VSS：挥发性悬浮固体。
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