title: Influences of iron and calcium carbonate on wastewater treatment performances of algae based reactors.
abstract: The influences of iron and calcium carbonate (CaCO3) addition in wastewater treatments reactors performance were investigated. Adding different concentrations of Fe(3+) (5, 10, 30 and 50mmol/m(3)), iron and CaCO3 powder led to changes in algal characteristics and physico-chemical and microbiological properties. According to the investigation results, nutrient removal efficiency in algae based reactors was obviously increased by the addition of 10mmol/m(3) Fe(3+), iron (5mmol/m(3)) and CaCO3 powder (0.2gm(-3)) and the removal efficiencies of BOD5, TN, and TP in Stage 2 were respectively increased by 28%, 8.9%, and 22%. The improvements in physico-chemical performances were verified by microbial community tests (bacteria quantity, activity and community measured in most probable number, extracellular enzymes activity, and Biolog Eco Plates). Microbial variations indicated the coexistence of Fe ions and carbonate-bicarbonate, which triggered the synergistic effect of physico-chemical action and microbial factors in algae based reactors.
authors.affiliation: College of Environmental Science and Engineering, Donghua University, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China.
authors.forename: Zhimiao
authors.initials: Z
authors.lastname: Zhao
authors.affiliation: College of Environmental Science and Engineering, Donghua University, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China.
authors.forename: Xinshan
authors.initials: X
authors.lastname: Song
authors.affiliation: College of Environmental Science and Engineering, Donghua University, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.affiliation: College of Environmental Science and Engineering, Donghua University, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China.
authors.forename: Yanping
authors.initials: Y
authors.lastname: Xiao
authors.affiliation: College of Environmental Science and Engineering, Donghua University, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China.
authors.forename: Zhijie
authors.initials: Z
authors.lastname: Gong
authors.affiliation: College of Environmental Science and Engineering, Donghua University, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China.
authors.forename: Yuhui
authors.initials: Y
authors.lastname: Wang
authors.affiliation: College of Environmental Science and Engineering, Donghua University, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China.
authors.forename: Yufeng
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: College of Environmental Science and Engineering, Donghua University, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Chen
authors.affiliation: College of Environmental Science and Engineering, Donghua University, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China.
authors.forename: Mengyuan
authors.initials: M
authors.lastname: Mei
mesh_terms: D001419:Bacteria; D019149:Bioreactors / Q000382:microbiology*; D002119:Calcium Carbonate / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D062065:Wastewater / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D002119:Calcium Carbonate; D007501:Iron; D062065:Wastewater
keywords: Algae based reactor; Calcium carbonate; Iron; Wastewater treatment