餐厨垃圾-剩余污泥物料配比对厌氧共发酵产挥发性脂肪酸的影响  

EFFECTS OF MATERIAL RATIO ON VOLATILE FATTY ACIDS PRODUCTION FROM ANAEROBIC CO-FERMENTATION OF FOOD WASTE AND WASTE-ACTIVATED SLUDGE

作　　者：张达 林青山 崔鹏 程伯夷 王宗平[1] 郭刚 ZHANG Da;LIN Qingshan;CUI Peng;CHENG Boyi;WANG Zongping;GUO Gang(School of Environmental Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;China City Environment Protection Engineering Limited Co.,Ltd.,Wuhan 430205,China)

机构地区：[1]华中科技大学环境科学与工程学院,武汉430074 [2]中冶南方都市环保工程技术股份有限公司,武汉430205

出　　处：《环境工程》2024年第8期125-133,共9页Environmental Engineering

基　　金：国家重点基础研究发展计划项目“长江经济带大中城市多源有机固废园区化协同处置及示范”(2019YFC1904005);湖北省重点研发计划项目“工业含盐废水脱盐、重金属去除及深度脱碳关键技术研究”(2022BCA065);国家自然科学基金项目“单质硫强化低碳源污水反硝化除磷机理及调控”(52100040)。

摘　　要：以餐厨垃圾和剩余污泥为研究对象,考察不同物料配比(餐厨垃圾投加比例为0%,25%,50%,75%和100%)对16 d的厌氧共发酵产挥发性脂肪酸(volatile fatty acids,VFAs)的影响。结果表明:餐厨垃圾的加入有助于有机质的溶解,平衡体系C/N,弥补营养物质,从而提升厌氧发酵系统的性能。当餐厨垃圾投加比例为50%时,厌氧共发酵产VFAs达到最高为(282.8±2.9)mg COD/g VSS。在厌氧发酵过程中,产酸微生物(Prevotella_7,Lactobacillus,Veillonella)丰度逐渐升高,水解酶和产酸酶的相对活性在发酵初期被抑制,在中后期被促进,而产甲烷酶在整个过程均被抑制,从而促进了VFAs的产量。该成果为餐厨垃圾和剩余污泥厌氧共发酵产酸资源化利用提供了一定的理论基础。Food waste(FW)and waste-activated sludge(WAS)were utilized to study the effects of different FW proportions(0%,25%,50%,75%,and 100%)on the performance of anaerobic co-fermentation(Co-AF)for volatile fatty acids(VFAs)synthesis during 16 days.The results demonstrated that injecting FW increased Co-AF performance by promoting organic matter decomposition,balancing the system’s C/N ratio,and delivering critical nutrients.When the FW ratio was 50%,the maximum VFA yield was(282.8±2.9)mg COD/g VSS.The abundance of acidogenic bacteria(Prevotella_7,Lactobacillus,Veillonella)increased steadily during the co-fermentation period,the activities of hydrolytic and acidogenic enzymes were inhibited early but recovered later,and methanogenic enzymes were inhibited throughout the period,which promoted VFA accumulation.This research could promote the utilization of WAS and FW through the Co-AF process.

关 键 词：餐厨垃圾 剩余污泥 厌氧共发酵 挥发性脂肪酸 

分 类 号：X799.3[环境科学与工程—环境工程] X703