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中文摘要：
采用单段UASB工艺处理甲醇废水,以颗粒污泥为接种污泥,在容积负荷为18kg-COD/（m3·d）、污泥负荷为1.098 kgCOD/（kgVSS·d）的条件下,反应器运行平稳,对COD的去除率＞90%,且处理全程始终未出现挥发性脂肪酸的积累现象.当外加碱度（以CaCO3计）降低到119 mg/L时,反应器内的pH值仍可保持稳定.甲醇在转化为甲烷的生物化学过程中,以直接还原成甲烷为主要途径,而通过形成乙酸再转化为甲烷并不是主要途径,因此甲醇废水的厌氧生物处理通常并不存在由脂肪酸的积累引起的毒性作用和pH的急剧变化所导致的运行不稳定.
英文摘要：
Methanol wastewater was treated in a lab-scale UASB reactor seeded with granular sludge. Under the conditions of volume load 18 kgCOD/（m^3 · d） and sludge load 1. 098 kgCOD/ （ kgVSS · d） , steady operation is achieved with more than 90% of total COD removed. It is remarkable that no acidification appears during the operation period. Even when the added alkalinity of the influent is as low as 119 mg/L, the pH value in the reactor is still kept at a satisfactory level. The research indicates that in the biological process of methanol converted into methane, the production of acetic acids as an intermediate product can be ignored and the direct production of methane from methanol should be predominant. The experiment results show that it is possible to have no toxicity caused by the accumulation of fatty acids and the unstable operation created by the drastic fluctuation of the pH value.
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