The united membrane biological reactor(UMBR) was studied for the treatment of some simulate and municipal wastewater. The removal efficiency for COD and turbidity are greater than 80% and 99% respectively. Effluent CO...The united membrane biological reactor(UMBR) was studied for the treatment of some simulate and municipal wastewater. The removal efficiency for COD and turbidity are greater than 80% and 99% respectively. Effluent COD is less than 100 mg/L while turbidity less than 5 The removal of LAS in bath wastewater is greater than 70%. In treatment of dinning hall wastewater, removal of fatty oil is greater than 90%, and its concentration in effluent is less than 5 mg/L. The match of biological reactor and the membrane separation component were calculated. The stable performance of wastewater treatment can be maintained by the optimization of operation conditions and the cleanout of membranes.展开更多
[Objective] The aim was to address the difficulty of long pipe for centralized sewage treatment in campus life and difficulty in use. [ Method] Though the four integrated approach of fermentation tank, coal ash slag f...[Objective] The aim was to address the difficulty of long pipe for centralized sewage treatment in campus life and difficulty in use. [ Method] Though the four integrated approach of fermentation tank, coal ash slag filters, chemical and biological membrane reactor and separation of heavy metals in electromagnetic fields, the green wastewater treatment system in campus life was designed to realize the recycle use of sewage in campus life. [ Result] The processed sewage can flush the restroom. The sludge in the processed sewage can feed earthworms, while earth- worms （material or production servers） were food for chickens and ducks and the compost of earthworms was fertilizer, which brought promising economic and social benefits. Tests showed that using the green treatment system to process campus sewage can achieve or pass national second emission standard. Process charge was 50% lower than the centralized sewage processed company and the treatment process was completely qreenized and recvclincl rate was hiah.展开更多
To evaluate direct greenhouse gas emissions from Membrane Biological Reactor(MBR),measurements of nitrous oxide(N_(2)O)and methane(CH_(4))were made at a pilot-scale MBR treating municipal wastewater Measurements were ...To evaluate direct greenhouse gas emissions from Membrane Biological Reactor(MBR),measurements of nitrous oxide(N_(2)O)and methane(CH_(4))were made at a pilot-scale MBR treating municipal wastewater Measurements were conducted during two campaigns with some changes in processes,i.e.introducing a pre-aeration tank in the second measurement,different distributions of aeration in the treatment line,not the same wastewater inflow rate,two types of ultrafiltration membrane.It was found that about 0.004% and 0.07% of the total ammonium loads were emitted as N_(2)O,CH_(4) emissions were 0.026% and 0.12% of incoming TOC(0.008% and 0.04% of incoming COD)in 2014 and 2018.The obtained N_(2)O emission values were relatively low.The study suggested that a high aeration at the beginning of the treatment line may result in significantly high emissions of both N_(2)O and CH_(4).A significant change in aeration in the membrane ultrafiltration tank did not have the same impact.The MBR process is known for high quality effluent but have been questioned due to its higher carbon footprint due to energy consumption.This study gave a reference case about direct GHG emissions from MBR process and provide information for the further evaluation of MBR processes.展开更多
文摘The united membrane biological reactor(UMBR) was studied for the treatment of some simulate and municipal wastewater. The removal efficiency for COD and turbidity are greater than 80% and 99% respectively. Effluent COD is less than 100 mg/L while turbidity less than 5 The removal of LAS in bath wastewater is greater than 70%. In treatment of dinning hall wastewater, removal of fatty oil is greater than 90%, and its concentration in effluent is less than 5 mg/L. The match of biological reactor and the membrane separation component were calculated. The stable performance of wastewater treatment can be maintained by the optimization of operation conditions and the cleanout of membranes.
文摘[Objective] The aim was to address the difficulty of long pipe for centralized sewage treatment in campus life and difficulty in use. [ Method] Though the four integrated approach of fermentation tank, coal ash slag filters, chemical and biological membrane reactor and separation of heavy metals in electromagnetic fields, the green wastewater treatment system in campus life was designed to realize the recycle use of sewage in campus life. [ Result] The processed sewage can flush the restroom. The sludge in the processed sewage can feed earthworms, while earth- worms （material or production servers） were food for chickens and ducks and the compost of earthworms was fertilizer, which brought promising economic and social benefits. Tests showed that using the green treatment system to process campus sewage can achieve or pass national second emission standard. Process charge was 50% lower than the centralized sewage processed company and the treatment process was completely qreenized and recvclincl rate was hiah.
文摘To evaluate direct greenhouse gas emissions from Membrane Biological Reactor(MBR),measurements of nitrous oxide(N_(2)O)and methane(CH_(4))were made at a pilot-scale MBR treating municipal wastewater Measurements were conducted during two campaigns with some changes in processes,i.e.introducing a pre-aeration tank in the second measurement,different distributions of aeration in the treatment line,not the same wastewater inflow rate,two types of ultrafiltration membrane.It was found that about 0.004% and 0.07% of the total ammonium loads were emitted as N_(2)O,CH_(4) emissions were 0.026% and 0.12% of incoming TOC(0.008% and 0.04% of incoming COD)in 2014 and 2018.The obtained N_(2)O emission values were relatively low.The study suggested that a high aeration at the beginning of the treatment line may result in significantly high emissions of both N_(2)O and CH_(4).A significant change in aeration in the membrane ultrafiltration tank did not have the same impact.The MBR process is known for high quality effluent but have been questioned due to its higher carbon footprint due to energy consumption.This study gave a reference case about direct GHG emissions from MBR process and provide information for the further evaluation of MBR processes.
