连续流态下好氧颗粒污泥的培养及处理制药废水的性能     

贾晓凤  孙长清  买文宁  周军  田永升 《地球科学》2013,38(4):870-876

在上流式好氧颗粒污泥床反应器中, 以厌氧颗粒污泥和好氧絮状活性污泥为接种泥, 采用人工配制的模拟废水, 成功培养出性能优异的好氧颗粒污泥.反应器内污泥浓度稳定在5g/L左右, 颗粒污泥粒径为0.5~2.0mm, 当进水COD为2000mg/L, 容积负荷为4.8kg/(m3·d)时, 系统对COD的去除率稳定在96%以上.通过扫描电镜观察, 好氧颗粒污泥是层状结构, 表面有大量丝状菌缠绕, 内部有短杆菌和空穴存在.逐步提高制药废水在进水中的比例, 经过47d的培养, 生物制药废水完全取代模拟废水, 系统对COD、NH₃-N、TP的去除率分别稳定在90%、90%和70%以上.   相似文献   

Pond culture of seaweed Sargassum hemiphyllum in southern China     

于宗赫  胡超群  孙红岩  李海鹏  彭鹏飞 《中国海洋湖沼学报》2013,31(2):300-305

The seaweed Sargassum hemiphyllum is widely distributed throughout the coastal waters of Asia and has high commercial value.In recent years,its natural biomass has declined due to over-exploitation and environmental pollution.To seek for a feasible way to culture this seaweed efficiently,we designed a simple long-line system in a shrimp pond for the culture during winter,and the growth and nutritional composition of the seaweed were examined.Results show that the culture system was durable and flexible allowing S.hemiphyllum to grow vertically off the muddy bottom of the pond.Although the length of pondcultured S.hemiphyllum was inhibited by water depth,the weight-specific growth rate((1.65±0.17)%/d) was nearly three times higher than that of wild plants((0.62±0.19)%/d).The crude protein(6.92%±0.88%) and ash content(21.52%±0.07%) of the pond-cultured seaweed were significantly lower than those of the wild plants(9.38%±0.43% and 26.93%±0.07%,respectively);however,crude fat(1.01%±0.04%) was significantly higher than that of the wild plants(0.87%±0.02%).In addition,the nutritional composition of both pond-cultured and wild S.hemiphyllum was comparable to or even higher than those of other common seaweeds being used as food and/or aquaculture fodder.Future studies shall be focused on the impact of environmental parameters on its growth and nutritional composition.  相似文献   

A Novel Method for Dye Removal: Ionic Liquid‐Based Dispersive Liquid–Liquid Extraction (IL‐DLLE)     

Maysam Gharehbaghi  Farzaneh Shemirani 《洁净——土壤、空气、水》2012,40(3):290-297

A novel, simple, fast, and efficient ionic liquid‐based dispersive liquid–liquid extraction (IL‐DLLE) has been applied to extract and remove Congo Red (CR; a carcinogenic textile dye) from aqueous solutions. In this methodology a binary solution, containing the extraction solvent (1‐hexyl‐3‐methylimmidazolium bis(trifluormethylsulfonyl) imid) and a suitable disperser solvent, was rapidly injected into the water sample containing CR dye. Therewith, a cloudy solution was formed, and most of the dye molecules were extracted into fine IL droplets and removed from aqueous phase. The effects of pH, type, and amount of IL, initial concentration of the dye, type and volume of the dispersant, and concentrations of salt on the extraction of the dye were studied. Experimental surveys were also accomplished for recovery of the IL by applying a reverse dispersive liquid–liquid extraction using acidic stripping solutions.  相似文献   

Degradation of Reactive Dyes Using Advanced Oxidation Method          下载免费PDF全文

Özgen Ercan  Sabahattin Deniz  Ece Kök Yetimoğlu  Adnan Aydın 《洁净——土壤、空气、水》2015,43(7):1031-1036

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Recurrence of the world’s largest green-tide in 2009 in Yellow Sea, China: Porphyra yezoensis aquaculture rafts confirmed as nursery for macroalgal blooms     

Dongyan Liu  John K. Keesing  Zhijun Dong  Baoping Di  Peter Fearns 《Marine pollution bulletin》2010,60(9):1423-1432

In the summer of 2008, the world’s largest green-tide occurred in the Yellow Sea, China. The hypothesized cause was the expansion of Porphyra yezoensis aquaculture along the Jiangsu coastline and the re-occurrence of a green-tide in 2009 was predicted. In this study, satellite and field images showed the formation of the June 2009 green-tide which again originated from the Jiangsu coast. The responsible species, its source and biomass accumulation were studied to support the previous hypothesis. Morphological and phylogenetic analysis demonstrated the homology of Ulva prolifera in the 2008 green-tide with the U. prolifera from P. yezoensis aquaculture rafts. About 91-505 kg/ha of U. prolifera was attached to the P. yezoensis aquaculture rafts and a total biomass of 4956 tonnes was estimated during the harvesting of P. yezoensis. This is sufficient to seed a bloom when they are dislodged from the rafts as a result of harvesting practices.  相似文献   

组合生物技术处理制药废水及其生物相   总被引：2，自引：0，他引：2  

刘鹏  张兰英  刘莹莹  刘娜  刘峰  刘虹  崔哲  许国欣 《吉林大学学报(地球科学版)》2010,40(1):169-175

为有效治理化学制药废水和生物制药废水,采用水解酸化-活性污泥[-曝气生物滤池组合工艺对制药废水进行室内模拟生物处理研究。结果表明：该工艺对出水COD、BOD₅的去除率均大于90%,已达到《污水综合排放标准》（GB 8978-1996）二级标准。对生物相的显微镜观察分析表明,污泥絮体和生物膜生长良好,并出现变形虫、轮虫和漫游虫等原生和后生动物。对各构筑物中的细菌进行分离纯化,同时应用BIOLOG细菌鉴定系统进行鉴定,分别得到8株、3株、6株可培养的细菌。  相似文献   

Kinetic Modelling of the Removal of Seven Common Pollutants in Subsurface Flow Constructed Wetlands     

SUN Guangzhi  Antony Ladson 《湿地科学》2010,8(4)

The main removal mechanisms for the degradations of seven pollutants in wastewater treatment wetlands were analysed, and a mathematical model was established to quantify the removal of each pollutant, based on its main removal mechanisms. Subsurface horizontal flow wetlands were treated as a series of continuous stirred - tank reactors (CSTRs). Kinetic models for the removal of biochemical oxygen demand, chemical oxygen demand, ammonia, total nitrogen and faecal coliforms were established by combining Monod or first - order kinetics with CSTR assumptions. These tentative models account for a wide range of factors that affect wetland performance, but the models have not been proven by ex periment data. Depending on the derivation of various coefficients in the models and verification by actual performance data, this study may provide a starting point for an integrated pollutant removal model to be developed, and experimen tally verified, thereby making a step forward from the current greenbox' approach of wetland design.  相似文献   

Oil refinery wastewater treatment using coupled electrocoagulation and fixed film biological processes     

《Physics and Chemistry of the Earth》2016

Oil refinery wastewater was treated using a coupled treatment process including electrocoagulation (EC) and a fixed film aerobic bioreactor. Different variables were tested to identify the best conditions using this procedure. After EC, the effluent was treated in an aerobic biofilter. EC was capable to remove over 88% of the overall chemical oxygen demand (COD) in the wastewater under the best working conditions (6.5 V, 0.1 M NaCl, 4 electrodes without initial pH adjustment) with total petroleum hydrocarbon (TPH) removal slightly higher than 80%. Aluminum release from the electrodes to the wastewater was found an important factor for the EC efficiency and closely related with several operational factors. Application of EC allowed to increase the biodegradability of the sample from 0.015, rated as non-biodegradable, up to 0.5 widely considered as biodegradable. The effluent was further treated using an aerobic biofilter inoculated with a bacterial consortium including gram positive and gram negative strains and tested for COD and TPH removal from the EC treated effluent during 30 days. Cell count showed the typical bacteria growth starting at day three and increasing up to a maximum after eight days. After day eight, cell growth showed a plateau which agreed with the highest decrease on contaminant concentration. Final TPHs concentration was found about 600 mgL⁻¹ after 30 days whereas COD concentration after biological treatment was as low as 933 mgL⁻¹. The coupled EC-aerobic biofilter was capable to remove up to 98% of the total TPH amount and over 95% of the COD load in the oil refinery wastewater.  相似文献   

A Hybrid Approach: Indirect Electro‐Oxidation Followed by In Situ Electrogeneration of H2O2 in Real Textile Effluent          下载免费PDF全文

Priyadharshini Aravind  Rajeswari Selvaraj  Angappan Sankarmahalingam  Subramanian Kandasamy 《洁净——土壤、空气、水》2016,44(4):362-370

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Influence of Temperature on the Removal of Extremely High Concentration p‐Nitrophenol Simulated Wastewater by Fe/Cu/H2O Systems          下载免费PDF全文

Bo Lai  Dong‐Hai Yuan  Zhao‐Yu Chen  Yue Yuan  Ping Yang 《洁净——土壤、空气、水》2016,44(4):345-355

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