title: Enhanced phosphorus removal from wastewater by growing deep-sea bacterium combined with basic oxygen furnace slag.
abstract: As one solid waste with potential for phosphorus removal, application of slags in water treatment merits attention. But it was inhibited greatly by alkaline solution (pH>9.5) and cemented clogging generated. To give one solution, phosphorus removal was investigated by combining deep-sea bacterium Alteromonas 522-1 and basic oxygen furnace slag (BOFS). Results showed that by the combination, not only higher phosphorous removal efficiency (>90%) but also neutral solution pH of 7.8-8.0 were achieved at wide ranges of initial solution pH value of 5.0-9.0, phosphorus concentration of 5-30mg/L, salinity of 0.5-3.5%, and temperature of 15-35°C. Moreover, sedimentary property was also improved with lower amount of sludge production and alleviated BOFS cementation with increased porosity and enlarged particle size. These results provided a promising strategy for the phosphorus recovery with slags in large-scale wastewater treatment.
authors.affiliation: School of Environmental Science and Engineering, Shandong University, Jinan 250100, China. Electronic address: wzzhou@sdu.edu.cn.
authors.forename: Weizhi
authors.initials: W
authors.lastname: Zhou
authors.affiliation: School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.
authors.forename: Zhaosong
authors.initials: Z
authors.lastname: Huang
authors.affiliation: School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.
authors.forename: Cuiping
authors.initials: C
authors.lastname: Sun
authors.affiliation: School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.
authors.forename: Haixia
authors.initials: H
authors.lastname: Zhao
authors.affiliation: State Key Lab of Microbial Technology, Shandong University, Jinan 250100, China.
authors.forename: Yuzhong
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D000327:Adsorption; D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D006863:Hydrogen-Ion Concentration; D010100:Oxygen / Q000737:chemistry*; D010316:Particle Size; D010758:Phosphorus / Q000302:isolation & purification*; D054712:Salinity; D012623:Seawater / Q000382:microbiology*; D012722:Sewage / Q000737:chemistry; D013696:Temperature; D014866:Waste Products; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D010100:Oxygen; D010758:Phosphorus; D012722:Sewage; D014866:Waste Products; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Basic oxygen furnace slag; Cementation alleviation; Deep-sea bacterium; Phosphorus removal; pH buffering