title: Volatile Fatty Acids Production from Codigestion of Food Waste and Sewage Sludge Based onβ-Cyclodextrins and Alkaline Treatments.
abstract: Volatile fatty acids (VFAs) are preferred valuable resources, which can be produced from anaerobic digestion process. This study presents a novel technology usingβ-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 andβ-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 gβ-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.
authors.affiliation: Postdoctoral Research Station of Civil Engineering, Tongji University, Siping Road, Shanghai 200092, China; State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
authors.forename: Xue
authors.initials: X
authors.lastname: Yang
authors.affiliation: Department of Environmental Science and Engineering, Fudan University, Handan Road, Shanghai 200433, China.
authors.forename: Xiang
authors.initials: X
authors.lastname: Liu
authors.affiliation: Department of Environmental Science and Engineering, Fudan University, Handan Road, Shanghai 200433, China.
authors.forename: Si
authors.initials: S
authors.lastname: Chen
authors.affiliation: College of Materials Science and Chemical Engineering, Harbin Engineering University, Nantong Street, Harbin 150001, China.
authors.forename: Guangmin
authors.identifier: 0000-0001-6982-9691
authors.initials: G
authors.lastname: Liu
authors.affiliation: China Nerin Engineering Co., Ltd., Hainan Branch Company, Jinmao West Road, Hainan 570100, China.
authors.forename: Shuyan
authors.initials: S
authors.lastname: Wu
authors.affiliation: Department of Environmental Science and Engineering, Fudan University, Handan Road, Shanghai 200433, China.
authors.forename: Chunli
authors.identifier: 0000-0002-6027-4869
authors.initials: C
authors.lastname: Wan
mesh_terms: D000468:Alkalies / Q000378:metabolism*; D000693:Anaerobiosis; D019149:Bioreactors; D005232:Fatty Acids, Volatile / Q000378:metabolism*; D005502:Food; D007220:Industrial Waste; D012722:Sewage / Q000382:microbiology*; D047392:beta-Cyclodextrins / Q000378:metabolism*
chemical_list: D000468:Alkalies; D005232:Fatty Acids, Volatile; D007220:Industrial Waste; D012722:Sewage; D047392:beta-Cyclodextrins