盐度强化剩余污泥碱性发酵产酸  

Enhanced production of short-chain fatty acids from waste activated sludge alkaline fermentation:The effect of sa-linity

作　　者：邢立群[1] 彭永臻[1] 金宝丹[1] 何岳兰 曾薇[1] 

机构地区：[1]北京工业大学,北京市水质科学与水环境恢复工程重点试验室,北京市污水脱氮除磷处理与过程控制工程技术研究中心,北京100124

出　　处：《中国环境科学》2015年第6期1771-1779,共9页China Environmental Science

基　　金：国家“863”项目(2012AA063406);北京市科研基地建设-科技创新平台

摘　　要：短链脂肪酸（SCFAs）是生物脱氮除磷的优质碳源,为提高剩余污泥碱性发酵SCFAs的产量,分别在20℃和35℃条件下,考察了不同盐度（0～25g/L）对剩余污泥碱性（p H=10）发酵的影响.结果表明：在20℃和35℃条件下,投加适量的氯化钠均可提高SCFAs产量,且氯化钠投加量为15g/L时SCFAs产量最大,较不投加时分别提高了42.3%和15.0%.进一步的研究表明,适量的投加氯化钠促进了生成SCFAs所需底物（蛋白质和多糖）的释放,同时提高了发酵系统的C/N（SCFAs/NH4＋-N）.因此,盐度联合碱性p H值可强化剩余污泥发酵产生SCFAs,同时达到剩余污泥减量的效果.Short chain fatty acids （SCFAs） were used as high quality carbon source for biological denitrification and phosphorus removal process. In order to improve the SCFAs production of waste activated sludge （WAS） in alkaline fermentation system, the effect of salinity （0-25g/L） on the WAS alkaline fermentation （pH=10） was studied at 20℃ and 35 ℃,respectively. The results showed that adding appropriate sodium chloride （NaC1） enhanced the SCFAs production. The highest accumulation of SCFAs appeared at 15g/L NaCI and improved by 42.3% （20 ℃） and 15.0% （35 ℃） comparing with no NaCI addition. Further researches indicated that adding NaC1 could increase the release of substrate （protein and polysaecharide） to produce more SCFAs, accompanied by the increase of C/N （SCFAs/NH4＋-N）. Therefore, the integrated control of salinity and pH could enhance the SCFAs generation from WAS fermentation and promote WAS reduction simultaneously.

关 键 词：剩余污泥 厌氧发酵 短链脂肪酸 盐度 温度 

分 类 号：X705[环境科学与工程—环境工程]