复合式膜生物反应器处理校园生活污水中试分析-市政工程专业论文.docxVIP

西安建筑科技大学硕士学位论文 西安建筑科技大学硕士学位论文 西安建筑科技大学硕士学位论文 西安建筑科技大学硕士学位论文 A Pilot-scale study of Hybrid Membrane Bioreactor applied to campus wastewater treatment Speciality: municipal engineering Author: Chen Hua Adviser: Prof. X.C. Wang Abstract Hybrid Membrane Bioreactor (HMBR) was applied to treat campus wastewater. Compared to Conventional Membrane Bioreactor (MBR), HMBR added carrier into MBR, which makes suspended biomass and attached biomass existed in the reactor simultaneously. Both kinds of biomass play the role of organic pollutant biodegraduation and promoting nitrogen and phosphor removal effiency. A pilot-scale HMBR was carried out in Xi’an Siyuan Wastewater Treatmen Plant. The performance of HMBR was focused on pollutant removal efficiency, the extraction methods and analysis of Extracellular Polymeric Substances (EPS), activated sludge characteristic and membrane fouling control. More than five months continuous monitoring, the result showed that HMBR could keep stable operation and resist the loading fluctuation. Under low load operation, HMBR also had high removal efficiency for COD, TOC, UV254, NH3-N, the average removal rate was 90.63%, 98.8%, 40.41%, 98.43%, respectively. Nitrogen and phosphor removal effiency of HMBR was strongly inffluented by organic loading, the removal rate reached to 33.18% and 30.49%. The average removal rate of Chroma was 97.18%. The removal rate of turbidity was nearly 100%, turbidity almost could not be detected in effluent water. Through the biological treatment and membrane filtration, the number of total bacteria and E. coli could meet Miscellaneous Urban Water Quality Standard (GB/T18920-2002). After disinfection, the effluent water could be reused safely. Four methods including high-speed centrifugation, ultrasonication, cation exchange resin, heating were employed for extracting EPS of activated sludge from HMBR. Chemical analysis method combined with excitation–emission matrix (EEM) and gel-permeating chromatography (GPC) to