【摘 要】
：
Chinese traditional medicine wastewater,rich in macromolecule and easy to foam in aerobic biodegradation such as Glycosides.was treated by two identical bench-s
【机 构】
：
School of Municipal and Environmental Engineering,School of Water Conservancy and Environment Engine
论文部分内容阅读
Chinese traditional medicine wastewater,rich in macromolecule and easy to foam in aerobic biodegradation such as Glycosides.was treated by two identical bench-scale aerobic submerged membrane bioreactors (SMBRs) operated in parallel under the same feed,equipped with the same electronic control backwashing device.One was used as the control SMBR (CSMBR) while the other was dosed with powdered activated carbon (PAC)(PAC-amended SMBR,PSMBR).The backwashing interval was 5 min.One suction period was about 90 min by adjusting preestablished backwashing vacuum and pump frequency.The average flux of CSMBR during a steady periodic state of 24 d (576 h) was 5.87 L/h with average hydraulic residence time (HRT) of 5.97h and that of PSMBR during a steady periodic state of 30 d (720 h) was 5.85 L/h with average HRT of 5.99 h.The average total chemical oxygen demand (COD) removal wastewater effluent standard GB8978-1996 for the raw medicine material industry (300 mg/L).Hence,SMBR with electronic control backwashing was a viable process for medium- strength Chinese traditional medicine wastewater treatment.Moreover,the increasing rates of preestablished backwashing vacuum,pump frequency,and vacuum and flux loss caused by mixed liquor in PSMBR all lagged compared to those in CSMBR:thus the actual operating time of the PSMBR system without membrane cleaning was extended by up to 1.25 times in contrast with the CSMBR system,and the average total COD removal efficieney of PSMBR was enhanced with higher average OLR.
其他文献
Acidithiobacillus ferrooxidans ATCC23270 and Acidithiobacillus thiooxidans TM-32 were used for bioleaching of spent refractories of aluminium and copper melting
A study was carried out at the Loess Plateau in Dongzhi,China,to test the feasibility of using secondary treatment sewage effluent and to determine whether the
本试验旨在研究不同营养水平全饲粮颗粒料对绵羊瘤胃液挥发性脂肪酸(VFA)浓度和比例的影响.选用3.5～4月龄,体重15 kg左右的陶赛特(♂)×藏羊(♀)杂交一代公羔15只,采用单因子
Methyl tert-butyl ether (MTBE),a gasoline additive,possesses serious problems to the environmental health.In the present study,a bacterial culture named A-3 whi
The turuovor of phosphorus (P) in lake sediments,a major cause of eutrophication and subsequent deterioration of water quality,is in need of deep understanding.
The simultaneous nitrification and denitrification in step-feeding biological nitrogen removal process were investigated under different influent substrate conc
Keratinous wastes could be degraded by some microorganisms in nature.Native human foot skin (NHFS) was used as sole nitrogen source to screen microorganisms wit
Two new α,β-unsaturated butyrolactone derivatives, 4-(4″-hydroxybenzyl)-3-(3′-hydroxy-phenethyl)furan-2(5H)-one (1) and 3-(3′-hydroxyphenethyl)furan-2(5H)-
In an acetic acid-sodium acetate buffer solution of pH 3.6-6.8, a compound complex was formed between sodium hyaluronate (abbreviated as SH) and some basic bisp
Toxic effect of Zn(Ⅱ) on a green alga (Chlorella pyrenoidasa) in the presence of sepiolite and kaolinite was investigated.The Zn-free clays were found to have