生物炭对严重酸积累的甲烷发酵系统快速恢复的促进效果  

PROMOTIVE EFFECT OF BIOCHAR ON RAPID RECOVERY OF METHANE FERMENTATION SYSTEM FROM SEVERE ACID ACCUMULATION

作　　者：宇文超岁 李倩[1] 陈荣[1] 程辛茹 马静 YUWEN Chao-sui;LI Qian;CHEN Rong;CHENG Xin-ru;MA Jing(School of Environmental & Municipal Engineering,Xi'an University of Architecture & Technology, Xi'an 710055,China)

机构地区：[1]西安建筑科技大学环境与市政工程学院,西安710055

出　　处：《环境工程》2018年第12期155-159,170,共6页Environmental Engineering

基　　金：国家自然科学基金青年基金项目(51608430);陕西省教育厅重点实验室项目(17JS077)

摘　　要：基于生物炭对互营氧化过程的潜在促进机理,针对严重酸化的中温餐厨垃圾与污泥共发酵反应器(TVFA高达59.7 g COD/L),通过批次实验考察了生物炭促进酸化反应器中过量积累的VFAs降解及发酵系统快速恢复的可能性。结果表明:20 g/L生物炭能够使酸化系统中大量积累的VFAs在20 d内开始降解。而未添加生物炭的空白对照组,直至60 d后批次实验结束,仍未有恢复迹象。随后,将同等投加量的生物炭投加到实际酸化反应器中,发现反应器的pH值由6.7迅速上升至7.3,积累的VFAs在10 d内出现明显下降。可见,生物炭可以有效促进过量积累VFAs的快速降解,这为实际厌氧发酵系统酸化后快速恢复提供了技术支持。Based on the potential promoting mechanism of biochar on syntrophic oxidation process, this study was carried out on the severely acidified medium temperature kitchen waste and sludge co-fermentation reactor(in which the TVFA was up to 59.7 g/L) to investigate the potential promotive effect of biochar on degradation of over-accumulated VFAs in acidification reactor and rapid recovery of fermentation system by batch tests. Results showed that adding 20 g/L of biochar could initiate the degradation of accumulated VFAs within 20 days. However, in the blank control group, by the end of the batch experiment after 60 d, no sign of recovery was found. After that, the biochar of the same dosage was added into the actual acidification reactor, and it was found that the pH of the reactor increased from 6.7 to 7.3 rapidly, and the accumulated VFAs dramatically decreased in 10 days, which revealed that biochar could promote the rapid degradation of over-accumulated VFAs. This could provide theoretical basis and technical support for rapid recovery of actual anaerobic fermentation system after acidification.

关 键 词：生物炭 厌氧发酵 VFA积累 互营氧化 

分 类 号：X703[环境科学与工程—环境工程]