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论文类型： 期刊论文

发表时间： 2018-04-01

发表刊物： APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY

收录刊物： Scopus、SCIE、PubMed

卷号： 184

期号： 4

页面范围： 1219-1231

ISSN号： 0273-2289

关键字： Excess sludge; Rumen microorganisms; Lignocellulose biodegradation; Biogas production; Feedstock concentration

摘要： A methane production system with continuous stirred-tank reactor, rumen liquid as inoculate microorganisms, and paper mill excess sludge (PES) as feedstock was studied. The work mainly focused on revealing the effect of feedstock concentration on the biogas production, which was seldom reported previously for the current system. The optimal fermentation conditions were found as follows: pH = 7, T = 39 +/- 1 A degrees C, sludge retention time is 20 days, sludge with total solids (TS) are 1, 2, 3.5, 5, 10, and 13% in weight. Daily gas yields were measured, and biogas compositions were analyzed by gas chromatograph. Under such conditions, the optimum input TS was 10 wt%, and the biogas yield and volume gas productivity were 280.2 mL/g center dot TS and 1188.4 mL L-1 center dot d(-1), respectively. The proportions of CH4 and CO2 in the biogas were 65.1 and 34.2%. The CH4 yield reached 182.7 mL/g VS (volatile suspended solid), which was higher than previously reported values. The findings of this work have a significant effect on promoting the application of digesting PES by rumen microorganisms and further identified the technical parameter.