title: Continuous bioproduction of short-chain fatty acids from sludge enhanced by the combined use of surfactant and alkaline pH.
abstract: This work reported the enhancement of continuous SCFA production from sludge by the combined use of surfactant (sodium dodecylbenzene sulfonate (SDBS)) and pH 10 (i.e., SDBS & pH 10). The maximal SCFA production (2056 mg COD/L) was achieved under the SDBS & pH 10 condition at a sludge retention time (SRT) of 12d, which was much higher than that of the blank, sole SDBS, or pH 10. The mechanisms investigation showed that the combined strategy had greater sludge solubilization, higher protein hydrolysis, and lower activity of methanogens. Fluorescence in situ hybridization analysis revealed that the abundance of bacteria was increased, whereas that of archaea was decreased by SDBS & pH 10. The excitation emission matrix fluorescence spectroscopy assay further suggested that SBDS caused protein structure change, which benefited protein hydrolysis.
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China.
authors.forename: Yinguang
authors.initials: Y
authors.lastname: Chen
authors.forename: Kun
authors.initials: K
authors.lastname: Liu
authors.forename: Yinglong
authors.initials: Y
authors.lastname: Su
authors.forename: Xiong
authors.initials: X
authors.lastname: Zheng
authors.forename: Qin
authors.initials: Q
authors.lastname: Wang
mesh_terms: D000143:Acids / Q000494:pharmacology; D000468:Alkalies / Q000494:pharmacology*; D000818:Animals; D001419:Bacteria / Q000187:drug effects / Q000378:metabolism; D001557:Benzenesulfonates / Q000494:pharmacology; D001709:Biotechnology / Q000379:methods*; D002417:Cattle; D005232:Fatty Acids, Volatile / Q000096:biosynthesis*; D005285:Fermentation / Q000187:drug effects; D006863:Hydrogen-Ion Concentration / Q000187:drug effects; D008697:Methane / Q000378:metabolism; D011134:Polysaccharides / Q000737:chemistry; D012710:Serum Albumin, Bovine / Q000378:metabolism; D012722:Sewage / Q000737:chemistry*; D012995:Solubility; D013501:Surface-Active Agents / Q000494:pharmacology*; D013997:Time Factors
chemical_list: D000143:Acids; D000468:Alkalies; D001557:Benzenesulfonates; D005232:Fatty Acids, Volatile; D011134:Polysaccharides; D012722:Sewage; D013501:Surface-Active Agents; D012710:Serum Albumin, Bovine; C001114:dodecylbenzenesulfonic acid; D008697:Methane