初始pH值对生物沥浸污泥同步脱水和灭菌的影响  

Effect of Initial p H Value on Simultaneous Dewatering and Disinfection of Municipal Sludge in the Bioleaching Process

作　　者：石明岩[1] 张露露[1] 罗佳文 彭一钊 石云峰 胡淑茵 

机构地区：[1]广州大学土木工程学院,广东广州510006 [2]广州市建筑科学研究院新技术开发中心有限公司,广东广州510440 [3]广州市金龙峰环保设备工程有限公司,广东广州510670

出　　处：《中国给水排水》2017年第9期104-108,共5页China Water & Wastewater

基　　金：国家自然科学基金资助项目(51308136);广东省高校科技创新项目(2013KJCX0147);广东省水利科技创新项目(2014-15);广东省研究生教育创新计划项目;国家级大学生创新训练项目(201511078012)

摘　　要：以城市污泥脱水和病原微生物灭活为目标,以S^0和FeS_2为能量底物,利用嗜酸性硫杆菌复合菌群对初始p H值在3.0~10.0范围内的城市污泥进行生物沥浸处理。结果表明,当达到最佳沥浸时刻时,污泥比阻由(2.7~2.8)×10^(12)m/kg降至(2.1~3.9)×10^(11)m/kg;沉降率由68%~75%提高至79%~86%;对SS的去除率达到7.2%~38.3%。当初始p H值为5.0、生物沥浸48 h时,污泥脱水和沉降性能均达到最佳状态:比阻由2.8×10^(12)m/kg降为2.1×10^(11)m/kg,沉降率由69%升至83%,SS去除率为16.1%。在不同初始pH值下对病原微生物的灭活率均在99%以上,初始p H值对灭菌无影响。Aiming for the municipal sludge dewatering and pathogen inactivation, compound bac- terium of acidophilic Thiobacilli was used in bioleaching process, with zero-valent sulfur and iron disul- fide as energy substrate, to treat municipal sludge with initial pH value ranging from 3.0 to 10.0. The results showed that when reaching the optimum bioleaching time, the SRF had decreased from （2.7 - 2.8） × 10^12 m/kg to （2.1 -3.9） × 10^11 m/kg, the sedimentation rate had increased from 68% -75% to 79% -86% , and the SS removal rate had reached up to 7.2% -38.3%. The dewatering and settling performance reached the optimum condition after 48 hours with an initial pH value of 5.0. The SRF de- clined from 2.8 × 10^12 m/kg to 2.1 × 10^11 m/kg, the sedimentation rate rose from 69% to 83% , and the SS removal rate was 16.1%. In addition, the inactivation rate of pathogenic microorganism was more than 99% with any initial pH values, i.e., it was insensitive to initial pH values.

关 键 词：城市污泥 生物沥浸 初始PH值 脱水 灭菌 

分 类 号：X703[环境科学与工程—环境工程]