NZVI对低有机质污泥厌氧消化系统及微生物群落的影响  

EFFECT OF NZVI ON ANAEROBIC DIGESTION SYSTEM WITH LOW ORGANIC SLUDGE AND ITS MICROBIAL COMMUNITY DIVERSITY

作　　者：王庆鹏 杨朝晖[1] 徐锐[1] 张燕茹 曹姣 WANG Qing-peng;YANG Zhao-hui;XU Rui;ZHANG Yan-ru;CAO Jiao(Key Laboratory of Environmental Biology and Pollution Control,College of Environmental Science and Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学环境科学与工程学院环境生物与控制教育部重点实验室,长沙410082

出　　处：《环境工程》2021年第5期31-37,54,共8页Environmental Engineering

基　　金：国家自然科学基金资助项目(51578223,51878258)。

摘　　要：采用投加不同剂量纳米零价铁(NZVI)(0,0.1,0.3,0.5 g/g VS)的低有机质污泥进行半连续中温厌氧消化试验,研究了反应器在不同NZVI投加量下的产甲烷特性及微生物群落变化。研究表明:NZVI的投加前期对产甲烷具有促进作用,随着反应器中NZVI累积逐渐对产甲烷产生抑制,且投加量越高抑制效果产生越早,抑制作用也越强。投加NZVI反应器未造成酸化或氨抑制,厌氧消化系统稳定性较好,系统上清液中磷酸盐去除率最高达到97.78%。NZVI的投加可以促进Firmicutes、Proteobacteria等水解产酸菌和Methanosarcina等多数氢营养型产甲烷菌的生长,而对严格的乙酸型产甲烷菌Methanosaeta生长有一定抑制作用。In order to investigate the effects of nano-valent zero iron(NZVI) dosage on the reactor performance and microbial community diversity of mesophilic sludge anaerobic digester with low organic load, a series of lab-scale tests were carried out with four NZVI dosage of 0, 0.1, 0.3 and 0.5 g/g VS. Results showed that NZVI could promote methanogenesis in the early period, while with the accumulation of NZVI in the reactor, the methane production was gradually inhibited;and the higher the concentration of zero-valent iron, the stronger the inhibition. The addition of NZVI did not cause acidification or ammonia suppression. Noticeably, the anaerobic digestors had great stability and the removal rate of phosphate in supernatant could reach 97.78%. The addition of NZVI promoted the growth of hydrolytic acid-producing bacteria, such as Firmicutes, Proteobacteria, and the growth of hydrogenotrophic methanogens such as Methanosarcina, while it had inhibitory effect on the growth of Methanosaeta.

关 键 词：低有机质污泥 纳米零价铁 厌氧消化 微生物群落 

分 类 号：X703[环境科学与工程—环境工程]