热碱处理污泥协同餐厨垃圾两相厌氧消化的特性  

TWO-PHASE ANAEROBIC DIGESTION PERFORMANCE OF FOOD WASTE AND HOT ALKALI TREATED SLUDGE

作　　者：黄宇钊 冼萍 李桃 刘琴 何顺 HUANG Yu-zhao, XIAN Ping, LI Tao, LIU Qin, HE Shun(College of Resources, Environment and Materials, Guangxi University, Nanning 530000, China)

机构地区：[1]广西大学资源环境与材料学院,南宁530000

出　　处：《环境工程》2018年第9期119-124,共6页Environmental Engineering

基　　金：国家自然科学基金(21167003);广西自然科学基金(2016GXNSFAA380294)

摘　　要：以热碱处理后的污泥和餐厨垃圾为原料,采用中温两相厌氧消化工艺,研究不同配比的污泥与餐厨垃圾的基质转化规律、产甲烷性能及系统稳定性等特性。结果表明:溶解性多糖及蛋白质在产酸阶段被大量消耗,二者去除率最高分别可达97.2%和70.4%,而餐厨垃圾比例占优的实验组,固态蛋白质溶出速率大于溶解性蛋白质水解速率。热碱污泥与餐厨垃圾混合厌氧消化的产气性能及稳定性明显得到提升,其中混合比例为2∶3的混合组产甲烷性能最佳,甲烷产率达261.6 mL/gVS,比单独餐厨垃圾消化组提升了29.6%,产甲烷过程中8 d实现了80%的甲烷产量,VS去除率最高达45.7%,产甲烷阶段VFAs/碱度小于0.2,系统稳定未出现酸化现象。Using two-phase anaerobic digestion process to treat sludge and food waste, after hot alkali treatment under medium temperature condition, the different ratios of sludge and food waste were designed to study the change of dissolved organic matter, methane production and system stability in mixtures with different proportions. The results showed that： soluble polysaccharide and.protein were consumed in the acid production stage, and the removal rate was up to 97.2% and 70. 4% , respectively; the dissolution rate of solid protein in experimental group was higher than that of soluble protein. The performance and stability of the mixed anaerobic digestion of the sludge and the food waste were improved obviously; the group with a mixed ratio of 2：3 reached the maximum methane production of 261.6 mL/g VS, improved by 29.6% comparing to the calculated yield of food waste. Moreover, 80% of methane were produced in the stage of methane fermentation in 8 days, and the highest removal efficiency of VS was 45.7% in the reactor, VFAs/alkalinity of methane production stage was less than 0. 2 and the system stability didn＇ t not appear acidizing phenomenon.

关 键 词：剩余污泥 餐厨垃圾 两相厌氧消化 产甲烷 稳定性 

分 类 号：X703[环境科学与工程—环境工程] X799