膜複合固定床バイオリアクターを用いたメタノール廃水の処理に関する研究

概要

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Some kind of high concentration wastewater has great potencial for treatment and recovery of energy by means of anaerobic digestion.A study on thermophilic anaerobic digestion using methanol synthetic wastewater was performed with a membrane separation process. The operation tests were investigated using a fixed-bed reactor packed with porous pumice stone and ultra-filtration (UF) membrane module for microbial retention.The results of continuous experiments revealed that : 1) the nutrients require were BOD : N : P=100 : 0.7 : 0.1, 2) the hydraulic retention time was 0.56 day 3) the maximum BOD volmetric loading rate was 69.5 g-BOD·l-1·d-1, 4) the average BOD removal rate was 99.5%, and 5) the circulated VSS in the bioreactor with a UF membrane was highly concentrated and had a high efficiency of methanol consumption and gas production.