title: Organics, sulfates and ammonia removal from acrylic fiber manufacturing wastewater using a combined Fenton-UASB (2 phase)-SBR system.
abstract: A combined Fenton-UASB (2 phase)-SBR system was employed to treat acrylic fiber manufacturing wastewater. The Chemical Oxygen Demand (COD) removal and effluent Biochemical Oxygen Demand (BOD) to COD were 65.5% and 0.529%, respectively, with the optimal Fenton conditions: ferrous was 300 mg/L; hydrogen peroxide was 500 mg/L; pH was 3.0; reaction time was 2.0 h. In two-phase UASB reactor, mesophilic operation (35±0.5 °C) was performed with hydraulic retention time (HRT) varied between 28 and 40 h. The results showed that with the HRT not less than 38 h, COD and sulfate removal were 65% and 75%, respectively. The greatest sizes of granule formed in the sulfate-reducing and methane-producing phases were 5 and 2 mm, respectively. Sulfate-reducing bacteria (SRB) accounted for 35% in the sulfate-reducing phase while methane-producing archaea (MPA) accounted for 72% in the methane-producing phase. During the SBR process, shortcut nitrification was achieved by temperature control of 30 °C.
authors.affiliation: State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, PR China. ljin0532@126.com
authors.forename: Jin
authors.initials: J
authors.lastname: Li
authors.forename: Zhaokun
authors.initials: Z
authors.lastname: Luan
authors.forename: Lian
authors.initials: L
authors.lastname: Yu
authors.forename: Zhongguang
authors.initials: Z
authors.lastname: Ji
mesh_terms: D000179:Acrylates / Q000737:chemistry; D000641:Ammonia / Q000302:isolation & purification*; D001419:Bacteria / Q000187:drug effects / Q000378:metabolism; D001673:Biodegradation, Environmental / Q000187:drug effects; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors / Q000382:microbiology*; D006861:Hydrogen Peroxide / Q000737:chemistry* / Q000494:pharmacology; D006863:Hydrogen-Ion Concentration / Q000187:drug effects; D007220:Industrial Waste / Q000032:analysis*; D007501:Iron / Q000737:chemistry* / Q000494:pharmacology; D009930:Organic Chemicals / Q000302:isolation & purification*; D010084:Oxidation-Reduction / Q000187:drug effects; D013431:Sulfates / Q000302:isolation & purification*; D013696:Temperature; D013997:Time Factors; D014865:Waste Disposal, Fluid; D018508:Water Purification / Q000295:instrumentation*
chemical_list: D000179:Acrylates; C045076:Fenton's reagent; D007220:Industrial Waste; D009930:Organic Chemicals; D013431:Sulfates; D000641:Ammonia; D006861:Hydrogen Peroxide; D007501:Iron; C036658:acrylic acid