title: [Effect of pilot UASB-SFSBR-MAP process for the large scale swine wastewater treatment].
abstract: In this paper, a treatment process consisted of UASB, step-fed sequencing batch reactor (SFSBR) and magnesium ammonium phosphate precipitation reactor (MAP) was built to treat the large scale swine wastewater, which aimed at overcoming drawbacks of conventional anaerobic-aerobic treatment process and SBR treatment process, such as the low denitrification efficiency, high operating costs and high nutrient losses and so on. Based on the treatment process, a pilot engineering was constructed. It was concluded from the experiment results that the removal efficiency of COD, NH4(+) -N and TP reached 95.1%, 92.7% and 88.8%, the recovery rate of NH4(+) -N and TP by MAP process reached 23.9% and 83.8%, the effluent quality was superior to the discharge standard of pollutants for livestock and poultry breeding (GB 18596-2001), mass concentration of COD, TN, NH4(+) -N, TP and SS were not higher than 135, 116, 43, 7.3 and 50 mg x L(-1) respectively. The process developed was reliable, kept self-balance of carbon source and alkalinity, reached high nutrient recovery efficiency. And the operating cost was equal to that of the traditional anaerobic-aerobic treatment process. So the treatment process could provide a high value of application and dissemination and be fit for the treatment pf the large scale swine wastewater in China.
authors.affiliation: College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China. princewang1988@126.com
authors.forename: Liang
authors.initials: L
authors.lastname: Wang
authors.forename: Chong-Jun
authors.initials: CJ
authors.lastname: Chen
authors.forename: Ying-Xu
authors.initials: YX
authors.lastname: Chen
authors.forename: Wei-Xiang
authors.initials: WX
authors.lastname: Wu
mesh_terms: D000822:Animal Husbandry; D000818:Animals; D001673:Biodegradation, Environmental; D019149:Bioreactors; D002681:China; D017616:Magnesium Compounds / Q000737:chemistry*; D009584:Nitrogen / Q000302:isolation & purification; D010710:Phosphates / Q000737:chemistry*; D010758:Phosphorus / Q000302:isolation & purification; D010865:Pilot Projects; D000069877:Struvite; D013552:Swine; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry
chemical_list: D017616:Magnesium Compounds; D009584:Nitrogen; D010710:Phosphates; D010758:Phosphorus; D000069877:Struvite; D062065:Wastewater