title: Internal carbon source from sludge pretreated by microwave-H2O2 for nutrient removal in A2/O-membrane bioreactors.
abstract: To improve the nutrient removal, the feasibility was studied for the organics released from sludge pretreated by microwave-H2O2 process (MHP) to be used as internal carbon source in two A2/O-membrane bioreactors (MBRs). The experiments were conducted for the nutrient removal and the membrane fouling. The results showed that the removal efficiencies of TN and TP were improved by 11% and 28.34%, respectively, as C/N ratio was adjusted to 8 by adding the internal carbon source, and the ratio of soluble chemical oxygen demand (sCOD) consumed easily for denitrification was about 46% of the total sCOD in the internal carbon source. The addition of the internal carbon sources did not lead to severe membrane fouling in the experimental A2/O-MBR. It is implied that the organics released from sludge pretreated by MHP could be used as the internal carbon source to enhance the nutrient removal in A2/O-MBRs.
authors.affiliation: a Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing 100085 , People's Republic of China.
authors.forename: Rongle
authors.initials: R
authors.lastname: Xu
authors.forename: Qing
authors.initials: Q
authors.lastname: Zhang
authors.forename: Juan
authors.initials: J
authors.lastname: Tong
authors.forename: Yuansong
authors.initials: Y
authors.lastname: Wei
authors.forename: Yaobo
authors.initials: Y
authors.lastname: Fan
mesh_terms: D057219:Biofouling; D019149:Bioreactors; D005240:Feasibility Studies; D006861:Hydrogen Peroxide; D008567:Membranes, Artificial; D008872:Microwaves; D009584:Nitrogen / Q000302:isolation & purification; D017672:Nitrogen Compounds / Q000302:isolation & purification; D009930:Organic Chemicals; D010758:Phosphorus / Q000302:isolation & purification; D012722:Sewage; D018508:Water Purification / Q000379:methods*
chemical_list: D008567:Membranes, Artificial; D017672:Nitrogen Compounds; D009930:Organic Chemicals; D012722:Sewage; D010758:Phosphorus; D006861:Hydrogen Peroxide; D009584:Nitrogen
keywords: internal carbon source; membrane fouling; microwave-H2O2 process; nutrient removal; sludge pretreatment