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Archaea
Volume 2016 (2016), Article ID 1698163, 8 pages
http://dx.doi.org/10.1155/2016/1698163
Research Article

Volatile Fatty Acids Production from Codigestion of Food Waste and Sewage Sludge Based on β-Cyclodextrins and Alkaline Treatments

1Postdoctoral Research Station of Civil Engineering, Tongji University, Siping Road, Shanghai 200092, China
2State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
3Department of Environmental Science and Engineering, Fudan University, Handan Road, Shanghai 200433, China
4College of Materials Science and Chemical Engineering, Harbin Engineering University, Nantong Street, Harbin 150001, China
5China Nerin Engineering Co., Ltd., Hainan Branch Company, Jinmao West Road, Hainan 570100, China

Received 18 May 2016; Accepted 19 June 2016

Academic Editor: William B. Whitman

Copyright © 2016 Xue Yang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Volatile fatty acids (VFAs) are preferred valuable resources, which can be produced from anaerobic digestion process. This study presents a novel technology using β-cyclodextrins (β-CD) pretreatment integrated alkaline method to enhance VFAs production from codigestion of food waste and sewage sludge. Experiment results showed that optimized ratio of food waste to sewage sludge was 3 : 2 because it provided adequate organic substance and seed microorganisms. Based on this optimized ratio, the integrated treatment of alkaline pH 10 and β-CD addition (0.2 g/g TS) performed the best enhancement on VFAs production, and the maximum VFAs production was 8631.7 mg/L which was 6.13, 1.38, and 1.57 times higher than that of control, initial pH 10, and 0.2 g β-CD/g TS treatment, respectively. Furthermore, the hydrolysis rate of protein and polysaccharides was greatly improved in integration treatment, which was 1.18–3.45 times higher than that of other tests. Though the VFAs production and hydrolysis of polymeric organics were highly enhanced, the primary bacterial communities with different treatments did not show substantial differences.