title: The use of fermentation liquid of wastewater primary sedimentation sludge as supplemental carbon source for denitrification based on enhanced anaerobic fermentation.
abstract: Wastewater primary sedimentation sludge was prepared into fermentation liquid as denitrification carbon source, and the main components of fermentation liquid was short-chain volatile fatty acids. Meanwhile, the acetic acid and propionic acid respectively accounted for about 29.36% and 26.56% in short-chain volatile fatty acids. The performance of fermentation liquid, methanol, acetic acid, propionic acid and glucose used as sole carbon source were compared. It was found that the denitrification rate with fermentation liquid as carbon source was 0.17mgNO3(-)-N/mg mixed liquor suspended solid d, faster than that with methanol, acetic acid, and propionic acid as sole carbon source, and lower than that with glucose as sole carbon source. For the fermentation liquid as carbon source, the transient accumulation of nitrite was insignificantly under different initial total nitrogen concentration. Therefore, the use of fermentation liquid for nitrogen removal could improve denitrification rate, and reduce nitrite accumulation in denitrification process.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China; School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai 264209, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China. Electronic address: hit_tianyu@163.com.
authors.forename: Yu
authors.initials: Y
authors.lastname: Tian
authors.affiliation: Marine College, Shandong University at Weihai, Weihai 264209, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Ding
authors.affiliation: School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai 264209, China.
authors.forename: Zhipeng
authors.initials: Z
authors.lastname: Li
mesh_terms: D000693:Anaerobiosis / Q000187:drug effects; D057919:Biological Oxygen Demand Analysis; D002244:Carbon / Q000494:pharmacology*; D058440:Denitrification / Q000187:drug effects*; D005232:Fatty Acids, Volatile / Q000032:analysis; D005285:Fermentation / Q000187:drug effects; D006863:Hydrogen-Ion Concentration; D009566:Nitrates / Q000302:isolation & purification; D058465:Nitrification / Q000187:drug effects; D009573:Nitrites / Q000302:isolation & purification; D012722:Sewage / Q000737:chemistry*; D014865:Waste Disposal, Fluid; D062065:Wastewater / Q000737:chemistry*
chemical_list: D002244:Carbon; D005232:Fatty Acids, Volatile; D009566:Nitrates; D009573:Nitrites; D012722:Sewage; D062065:Wastewater
keywords: Denitrification; Fermentation liquid; Supplemental carbon sources; Wastewater primary sedimentation sludge