初始pH对酸性预处理污泥厌氧发酵产氢的影响.pdfVIP

29 9 Vol. 29,No.9 2008 9 ENVIRONMENTAL SCIENCE Sep. ,2008 pH 1,2 3* 1 3 1 , , , , ( 1, 200092; 2, 350007; 3 , 350007) :pH ,HCl pH 4 24 h, NaOH 20~ 120 ,pH .,pH 20~ 40120 ,;pH 50~ 90 , , ,;pH 110 , ,,,pH 70~ 80,pH 203040 50() 059183050 056 mLg. :; ; ; ;pH : X705; X3821 : A :2008) Effects of Initial pH on Hydrogen Production from Acid Pretreated Municipal Sludge 1, 2 3 1 3 1 LIU Changqing , ZHANG Jiangshan , NIU Dongjie , CHEN Wenhua , ZHAO oucai ( 1State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; 2School of Geographical Science, Fujian Normal University, Fuzhou 350007, China; 3Institute of Environment Protection Science, Fujian NormalUniversity, Fuzhou 350007, China) Abstract:A series of batch tests were conducted to investigate the effects of initial pH on biohydrogen production from acid pretreated municipal sludge. The pH of sludgewas first adjusted to 20, 30, 40 and 50, stood by for 24 h in a refrigerator at 4 , then adjusted to pH 20120 respectively before using as the substrates for batch experiments. The results showed that the acid pretreated sludge with initial pH 110 gave the highest hydrogen production, andthe corresponding accumulative hydrogen for sludge(dry basis) pretreatedat pH 20, 30, 40 and 50were 059, 183, 050 and 056 mLg respectively. Hence, it could be seen that the initial pH 110 for the acid pretreated sludge should be the optimum pH range for promoting the growth of dominant hydrogenproducing anaerobes, while inhibiting hydrogen consuming anaerobes. Meanwhile it also could be concludedthat both hydrogenogen and methanogenwere inhibited at the initial pH 20to 40 and 120, which resulte