NDLI: The Production of Short-Chain Fatty Acids and Constituents with Primary Sludge as Fermentation Substrate under Different pHs

Content Provider	IEEE Xplore Digital Library
Author	Haiyan Wu Dianhai Yang Wei Liu Qi Zhou Junyan Gao
Copyright Year	2009
Abstract	This paper investigated the influence of pH on short-chain fatty acids (SCFAs) production and constituents with anaerobic fermentation of primary sludge from a Chinese wastewater treatment plant (WWTP). Controlled and uncontrolled pH experiments were conducted in ten completely mixed bench-scale reactors. Results showed that pH significantly influenced on the SCFAs yields and constituents from primary sludge as a potential fermentation substrate. At about 25 ¿, the alkaline pH owned more benefit of generating SCFAs than that at other pHs or in the blank test. At pH 10 SCFAs significantly increased in the 4–6 d of fermentation, from the initial of 12.2 to 319.9 (mg COD/g VSS). At pH 11, however, only 316.6 (mg COD/g VSS) of SCFAs were produced even at the fermentation of 10 d. At any pH value investigated, acetic, propionic and n-butyric acid were the three main products on the 4th day, they complied with the order of acidic pH ≫ alkaline pH ≫neutral pH except at pH 5. The percentage of acetic, propionic, n-butyric acid and the rest three acids was, respectively, 45, 21, 15, 18 % at pH 10.
Starting Page	645
Ending Page	648
File Size	244668
Page Count	4
File Format	PDF
ISBN	9780769538198
DOI	10.1109/ICEET.2009.624
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-10-16
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Biodegradable materials Pollution control Propionic acid Educational institutions Primary sludge Paper technology Inductors Wastewater treatment Variable structure systems Constituents Short-chain fatty acids (SCFAs) Production PH Solids Power engineering and energy
Content Type	Text
Resource Type	Article

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