煤制天然气废水的水解酸化法处理工艺

采用厌氧间歇式反应器，以煤制天然气（SNG）废水为处理对象，研究了在中温条件下水解酸化处理SNG废水后有机污染物的降解情况。以某柠檬酸生产厂废水厌氧反应器中的颗粒污泥为接种污泥进行4个月的驯化，形成处理SNG废水的稳定体系。试验结果表明运行温度为（35±1）℃，水解酸化时间为48h，进水CODcr总酚和挥发酚分别为1100、220和110mg／L的条件下，COD、总酚和挥发酚的去除率分别为45％、50％和99％左右，三者的降解均符合一级动力学特征。该体系主要停留在水解酸化阶段，甲烷产率为0．0025kgCHe／kgCODremoval，去除的TOC中有77％左右的有机碳用于污泥增殖，污泥增长率为0．3kgSS／kgCODremoval。

Technological Processes of Hydrolytic Acidification for Coal Gasification Wastewater Treatment

The anaerobic sequencing batch reactor was used for the study on treatment of synthetic natural gas （SNG） wastewater by hydrolytic acidification in the medium temperature. A stable system formed after 4 months＇ domestication of anaerobic granular sludge. The results indicate that when the concentration of CODcr, total phenol and volatile phenol respectively are 1 100, 220 and 110 mg/L, the removal rate respectively are about 45 %, 50 % and 99 %, in the condition of （35 ± 1） ℃ and 48 h for hydrolytic acidification. The bio-chemical degradation kinetics for COD, total phenol and volatile in this system fits for the characteristic model of first-order reaction kinetics. It is concluded that the methane-producing rate is 0.002 5 kg CH4/kg COD removal, 77 % of TOC re- moval is used for sludge proliferation and the sludge-increasing rate is 0.3 kg SS/kg COD removal.