title: Selection and application of agricultural wastes as solid carbon sources and biofilm carriers in MBR.
abstract: This paper examined the feasibility of agricultural wastes used as solid carbon sources and the effect of determined agricultural wastes on improving denitrification. Eight agricultural wastes were evaluated in MBR tests to find out their carbon release capacity, denitrification potential, leaching elements and surface properties. The results showed that retinervus luffae fructus, wheat straw, corncob and rice straw had higher carbon release capacity with COD of 13.17-21.07 mg g(-1)day(-1), BOD5 of 3.33-7.33 mg g(-1)day(-1) and respirable carbon of 8.64-10.71 mg g(-1)day(-1). Correspondingly, they displayed a good denitrification potential of 105.3-140.1mg NO3(-)-Ng(-1). Rice straw, retinervus luffae fructus and corncob were then applied in MBRs. These three agricultural wastes were found to be effective in enhancing the denitrification process, where the TN removal increased from 43.44% (control MBR) to 82.34, 68.92 and 62.97%, respectively.
authors.affiliation: School of Civil Engineering, Southeast University, Nanjing 210096, PR China.
authors.forename: Xiao-Li
authors.initials: XL
authors.lastname: Yang
authors.affiliation: School of Civil Engineering, Southeast University, Nanjing 210096, PR China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Jiang
authors.affiliation: School of Energy and Environment, Southeast University, Nanjing 210096, PR China. Electronic address: songhailiang@seu.edu.cn.
authors.forename: Hai-Liang
authors.initials: HL
authors.lastname: Song
authors.affiliation: School of Civil Engineering, Southeast University, Nanjing 210096, PR China.
authors.forename: Tian-Tian
authors.initials: TT
authors.lastname: Gu
authors.affiliation: School of Civil Engineering, Southeast University, Nanjing 210096, PR China.
authors.forename: Ming-Qian
authors.initials: MQ
authors.lastname: Xia
mesh_terms: D000383:Agriculture; D001673:Biodegradation, Environmental; D018441:Biofilms; D019149:Bioreactors; D002244:Carbon; D009566:Nitrates; D009584:Nitrogen; D062065:Wastewater / Q000737:chemistry; D018508:Water Purification / Q000379:methods*
chemical_list: D002244:Carbon; D009566:Nitrates; D009584:Nitrogen; D062065:Wastewater
keywords: Agricultural wastes; Biofilm carrier; Carbon/nitrogen ratio; Denitrification; Solid carbon source