次氯酸钙对厨余垃圾干式发酵产酸的影响  

Impact of Calcium Hypochlorite on Acid Generation through Dry Fermentation of Kitchen Waste

作　　者：张奇 尚莞 刘青鑫 刘同涛 王冠楠 韩鹏 孙英杰[3] 赵建伟 ZHANG Qi;SHANG Wan;LIU Qing‑xin;LIU Tong‑tao;WANG Guan‑nan;HAN Peng;SUN Ying‑jie;ZHAO Jian‑wei(Qingdao Jiebao Ecological Technology Co.Ltd.,Qingdao 266000,China;Qingdao Environmental Sanitation Development Center,Qingdao 266000,China;School of Environmental and Municipal Engineering,Qingdao University of Technology,Qingdao 266520,China)

机构地区：[1]青岛洁宝生态科技有限公司,山东青岛266000 [2]青岛市环境卫生发展中心,山东青岛266000 [3]青岛理工大学环境与市政工程学院,山东青岛266520

出　　处：《中国给水排水》2024年第19期115-121,共7页China Water & Wastewater

基　　金：国家自然科学基金资助项目(51908305)。

摘　　要：针对厨余垃圾干式发酵水解效率低、挥发性脂肪酸(VFA)积累不理想问题,在中温条件下探究了次氯酸钙(CH)强化厨余垃圾干式消化积累VFA效果,并解析了相关机制。结果表明,CH能强化厨余垃圾产VFA,且CH最佳剂量为9%(以总悬浮固体计),相应的VFA最大产量为14.5 g/L,发酵时间为10 d。CH提高了VFA中小分子羧酸乙酸盐和丙酸盐积累量。机制分析表明,CH促进了厨余垃圾有机物溶出,且CH含量越高,溶解性有机物释放量越大。然而CH阻碍了甲烷产生,且CH含量越高,甲烷积累量越低,当CH含量为12%时,甲烷积累量仅为125.9 mL/gVSS。关键酶活性分析表明,CH促进了水解和酸化酶活性,从而降低了甲烷化关键酶活性。Aimed at the issues of low hydrolysis efficiency and dissatisfactory accumulation of volatile fatty acids(VFA)in the dry fermentation of kitchen waste,the influences of calcium hypochlorite(CH)on the accumulation of VFA in the dry digestion of kitchen waste were explored under medium temperature conditions,and the related mechanism was analyzed.CH enhanced the production of VFA from kitchen waste.The optimal dosage of CH was 9%(measured by total suspended solids),with the corresponding maximum VFA production being 14.5 g/L,and the fermentation period was 10 days.CH enhanced the accumulation of small molecular carboxylic acids such as acetate and propionate in VFA.Mechanism analysis indicated that CH facilitated the dissolution of organic matters from kitchen waste.The higher the content of CH was,the greater the release of dissolved organic matter became.Nevertheless,CH impeded methane production,and the higher the CH content was,the lower the methane accumulation became.When the CH content reached 12%,the methane accumulation was merely 125.9 mL/gVSS.The analysis of key enzyme activity revealed that CH enhanced the activity of hydrolase and acidifying enzyme,and reduced the activity of the key methanation enzyme.

关 键 词：次氯酸钙 厨余垃圾 干式发酵 溶解性有机物 挥发性脂肪酸 关键酶活性 

分 类 号：TU992[建筑科学—市政工程]