Effect of organic loading rate on the biological performance of the thermophilic anaerobic membrane bioreactor treating pulp and paper primary sludge

A. Bokhary; M. Leitch; B. Q. Liao

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Effect of organic loading rate on the biological performance of the thermophilic anaerobic membrane bioreactor treating pulp and paper primary sludge

机译：Effect of organic loading rate on the biological performance of the thermophilic anaerobic membrane bioreactor treating pulp and paper primary sludge

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Waste-to-energy or value-added products have been increasingly considered in many pulp and paper mills (PPMs) worldwide. However, developing appropriate conversion technologies are a major challenge in transforming PPMs wastes into biofuels or value-added biomaterials. In the present study, a long term (320 d) anaerobic digestion of primary sludge of a thermome-chanical pulp mill (TMP) was carried out for the first time in a thermophilic anaerobic membrane bioreactor (ThAnMBR). Effect of organic loading rate (OLR) in the range of 2.5-6.8 kg COD/m~3 d and hydraulic retention times (HRT) of 3-8 d on the process performance was investigated. Under various OLRs, stable biogas productions were obtained, and the best results were achieved with lower OLR (2.5 kg COD/m~3 d) and higher HRT (8 d), at biogas yields of 189 L biogas/kg MLSS fed. However, it was found that the biogas production and sludge biomass degradation decrease when the organic loading rate increases. The proportion of sludge reduction ranged from 28.9 to 46.7 depending on the applied OLRs. Despite varying OLRs, stable membrane performance was obtained, where the required membrane flux was easily maintained during the reactor operation. In this study, also the properties of digestate and membrane permeates were studied under different operating conditions, and they fluctuated to some extent with OLR. ThAnMBR is a promising new technology for pulp and paper mill primary sludge treatment.

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《Clean technologies and environmental policy》 |2021年第9期|2669-2681|共13页
作者
A. Bokhary; M. Leitch; B. Q. Liao;
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作者单位

Faculty of Natural Resources Management, Lakehead University, Thunder Bay, ON P7B 5E1, Canada;

Faculty of Natural Resources Management, Lakehead University, Thunder Bay, ON P7B 5E1, Canada, Department of Chemical Engineering, Lakehead University, Thunder Bay, ON P7B 5E1, Canada;

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正文语种英语
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Biogas production; Biological performance; Primary sludge; Anaerobic digestion; Membrane bioreactor;

Effect of organic loading rate on the biological performance of the thermophilic anaerobic membrane bioreactor treating pulp and paper primary sludge

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