CAJ | 학술논문

污水生物处理过程中产生大量剩余污泥，对环境造成二次污染。将剩余污泥转化为短链脂肪酸（SCFAs），并将其作为脱氮除磷的补充碳源，对污泥减量和污水处理具有重要的意义。本文介绍了原位强化剩余污泥发酵产酸的技术及其原理，并对发酵液回用的技术参数及应用效果进行总结。剩余污泥可以通过碱性发酵、表面活性剂促进发酵、投加碳水化合物联合发酵等方式获取富含 SCFAs 的发酵液，其中 SCFAs 含量为常规发酵的3～8倍，没有生物毒性，是一种优质的生物脱氮除磷碳源，可以作为污水处理厂的补充碳源。强化剩余污泥在原位发酵，产生的发酵液就地使用，可在污水厂内部实现剩余污泥的综合利用，为剩余污泥处理提供了一条新思路。
오수생물처리과정중산생대량잉여오니，대배경조성이차오염。장잉여오니전화위단련지방산（SCFAs），병장기작위탈담제린적보충탄원，대오니감량화오수처리구유중요적의의。본문개소료원위강화잉여오니발효산산적기술급기원리，병대발효액회용적기술삼수급응용효과진행총결。잉여오니가이통과감성발효、표면활성제촉진발효、투가탄수화합물연합발효등방식획취부함 SCFAs 적발효액，기중 SCFAs 함량위상규발효적3～8배，몰유생물독성，시일충우질적생물탈담제린탄원，가이작위오수처리엄적보충탄원。강화잉여오니재원위발효，산생적발효액취지사용，가재오수엄내부실현잉여오니적종합이용，위잉여오니처리제공료일조신사로。
Biological treatment of wastewater produces lots of excess sludge,resulting in secondary pollution. Fermentation of excess sludge can produce short-chain fatty acids (SCFAs),which can be used as an additional carbon source of biological nutrient remover and is important to sludge reduction and wastewater treatment. Excess sludge can be treated by alkaline fermentation,surfactant fermenta-tion,and co-fermentation with carbohydrate and so on to get fermented liquid rich in SCFAs without bi-ological toxicity. Enhanced excess sludge fermentation in-situ produces SCFAs,3-8 times more than the conventional fermentation technology. Enhanced fermentation of the excess sludge in situ and liquid reuse in right place can realize the comprehensive utilization of sludge in sewage plant and provide a new way of thinking for residual sludge treatment. This review introduces the technologies and the mecha-nism of enhanced excess sludge in-situ fermentation and summarizes the process parameters and applica-tion effect of fermentation liquid recycling.