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利用微生物技术处理城镇污水 被引量:1
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作者 吕胜哲 周正坤 《石油规划设计》 1996年第4期33-35,共3页
文中介绍了微生物的筛选、培养与繁殖方法,污水处理工艺和监测方法,用机械和物理方法,分离出较粗及悬浮的污染物,再用微生物的方法氧化分解溶解性物质的胶质物。对污水进行处理,利用在曝气池中安装尼龙丝渔线毛刷填料,培养微生物... 文中介绍了微生物的筛选、培养与繁殖方法,污水处理工艺和监测方法,用机械和物理方法,分离出较粗及悬浮的污染物,再用微生物的方法氧化分解溶解性物质的胶质物。对污水进行处理,利用在曝气池中安装尼龙丝渔线毛刷填料,培养微生物为主工艺,处理城镇污水。 展开更多
关键词 污生处理 方法 石油工业
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Analysis on Selection of Domestic Sewage Treatment Method in Rural Area 被引量:14
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作者 万玉山 张平 +1 位作者 李定龙 马建锋 《Agricultural Science & Technology》 CAS 2011年第4期597-599,共3页
Based on the characteristics of the domestic sewage in rural district,four sewage treatment methods were analyzed.The results found that the optimum method was to process the domestic sewage on the spot,and it should ... Based on the characteristics of the domestic sewage in rural district,four sewage treatment methods were analyzed.The results found that the optimum method was to process the domestic sewage on the spot,and it should be popularized and applied in rural area. 展开更多
关键词 Rural domestic wastewater POLLUTION Treatment method
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Problem and Countermeasure of Rural Domestic Sewage Treatment 被引量:3
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作者 曲丽丽 李悦 +2 位作者 孔范龙 赵丽霞 孙鹏 《Agricultural Science & Technology》 CAS 2012年第12期2620-2622,共3页
With the development of rural economy, pollutions of rural sewage are in- creasingly serious. This paper introduces the characteristics of rural domestic sewage and the rural sewage treatment situation, and according ... With the development of rural economy, pollutions of rural sewage are in- creasingly serious. This paper introduces the characteristics of rural domestic sewage and the rural sewage treatment situation, and according to the problems of funds, management, process selection, policy and weak awareness of environmental protection in the rural domestic sewage treatment, puts forward relevant countermea- sures to ensure long-term operation of sewage treatment system, and achieve the purpose of improving rural water environment and protect the ecological environment in rural areas. 展开更多
关键词 Rural domestic sewage treatment PROBLEM COUNTERMEASURES
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Comprehensive Analysis of the Ecological Treatment of Scattered Domestic Wastewater in China 被引量:1
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作者 黄琳丽 潘晶 +1 位作者 孙铁珩 李海波 《Agricultural Science & Technology》 CAS 2011年第10期1552-1555,1560,共5页
The concept,merits and domestic project examples of ecological disposal technique of dispersal sewage were introduced in detail.It was pointed out that the ecological disposal of dispersal sewage was investment-saved,... The concept,merits and domestic project examples of ecological disposal technique of dispersal sewage were introduced in detail.It was pointed out that the ecological disposal of dispersal sewage was investment-saved,energy consumption-reduced and ecological balance-protected advanced technology.This technology was suitable for small community,dispersal units and agencies,villages and other regions without pipe network pervaded and an available approach for solving present environment-protection problems and keeping sustainable development in China. 展开更多
关键词 Dispersal sewage Ecological disposal Sustainable development
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RESEARCH ON MEMBRANE BIOREACTOR TREATING DOMESTIC WASTEWATER AND RELATED MECHANISMS
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作者 顾平 周丹 +1 位作者 杨造燕 刘锦霞 《Transactions of Tianjin University》 EI CAS 2001年第1期7-11,共5页
Experiments on treatment of domestic wastewater by membrane bioreactors were carried out.The results showed that this process could produce good quality effluent with low COD,turbidity and total count of bacteria.With... Experiments on treatment of domestic wastewater by membrane bioreactors were carried out.The results showed that this process could produce good quality effluent with low COD,turbidity and total count of bacteria.With intermittent operation and continuous aeration,the membrane flux was kept steady.The mechanisms of removing COD through membrane,the structure of membrane and filtration resistance were also discussed. 展开更多
关键词 wastewater treatment domestic wastewater membrane bioreactor electronic microscopic photograph filtration resistance
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Full-scale application of microbial agent on in-situ sludge reduction
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作者 谢慧芳 张晋华 +5 位作者 辛文力 胡灿洋 严梅 张青 贺启环 周建成 《Journal of Southeast University(English Edition)》 EI CAS 2016年第4期502-507,共6页
The full-scale application of Tx-1, a multifunctional microbial agent, was carried out for 8 months in an anoxic/oxic(A/O) municipal wastewater treatment process. The results show that the Tx-1 dosed system can obta... The full-scale application of Tx-1, a multifunctional microbial agent, was carried out for 8 months in an anoxic/oxic(A/O) municipal wastewater treatment process. The results show that the Tx-1 dosed system can obtain good effluent characteristics while minimizing sludge production and energy consumption. The total phosphorus(TP) is lower than0. 5 mg/L in effluent without any chemical regent added. The discharged dry sludge per 10 000 m^3 wastewater Dwat decreases from 1. 4 to 0. 5 t. For per cubic meter wastewater, the air supply decreases from 6. 0 to 5. 1 m^3 and the electricity consumption decreases from 0. 412- 0. 425 kW·h to 0. 331 kW·h. The addition of Tx-1 can improve the substrate removal constant and decrease the microorganism growth yield coefficient of activated sludge. At the same time,the structure of the microbial community changes and the biodiversity increases by adding Tx-1. The abundance of polyphosphate accumulating organisms(PAO), Comamonadaceae and Tetrasphaera, increased. Effective microbial agent is a potential way to combine in-situ sludge minimization with contaminants removal. 展开更多
关键词 wastewater treatment dosed anoxic/oxic(A/O) process diversity of microbial community kinetic parameters
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A system combining microbial fuel cell with photobioreactor for continuous domestic wastewater treatment and bioelectricity generation 被引量:9
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作者 蒋海明 罗生军 +2 位作者 师晓爽 戴萌 郭荣波 《Journal of Central South University》 SCIE EI CAS 2013年第2期488-494,共7页
A coupled system consisting of an upflow membrane-less microbial fuel cell (upflow ML-MFC) and a photobioreactor was developed, and its effectiveness for continuous wastewater treatment and electricity production was ... A coupled system consisting of an upflow membrane-less microbial fuel cell (upflow ML-MFC) and a photobioreactor was developed, and its effectiveness for continuous wastewater treatment and electricity production was evaluated. Wastewater was fed to the upflow ML-MFC to remove chemical oxygen demand (COD), phosphorus and nitrogen with simultaneous electricity generation. The effluent from the cathode compartment of the upflow ML-MFC was then continuously fed to an external photobioreactor for removing the remaining phosphorus and nitrogen using microalgae. Alone, the upflow ML-MFC produces a maximum power density of 481 mW/m 3 , and obtains 77.9% COD, 23.5% total phosphorus (TP) and 97.6% NH4+-N removals. When combined with the photobioreactor, the system achieves 99.3% TP and 99.0% NH4+-N total removal. These results show both the effectiveness and the potential application of the coupled system to continuously treat domestic wastewater and simultaneously generate electricity and biomass. 展开更多
关键词 wastewater treatment microbial fuel cell PHOTOBIOREACTOR MICROALGAE BIOELECTRICITY
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Life cycle assessment for waste acid treatment in zinc smelting 被引量:5
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作者 Ying-yan HU Min LI +3 位作者 Wei-guo WU Yong KE Lu-jing LIU Xue-liang WANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2022年第11期3822-3834,共13页
Lift cycle assessment(LCA)methodology was applied to evaluating and comparing two waste acid disposal processes in zinc smelting.The results indicate that environmental impacts of gas−liquid vulcanization technologies... Lift cycle assessment(LCA)methodology was applied to evaluating and comparing two waste acid disposal processes in zinc smelting.The results indicate that environmental impacts of gas−liquid vulcanization technologies are human toxicity,abiotic depletion potential,and global warming risk,which are mainly caused in neutralizing−evaporating−crystallization unit and electrodialysis unit.As for traditional lime neutralization method,vulcanization unit is the main factor.In this regard,the total environmental impact of traditional lime neutralization method is much higher than that of gas−liquid vulcanization technologies.Furthermore,the sensitive analysis shows that electricity and sodium sulfide(60%)are sensitive factors in two waste acid disposal technologies.In addition,the total cost of disposing a functional unit waste acid in traditional lime neutralization process is nearly 27 times that of the gas−liquid vulcanization waste acid disposal technologies. 展开更多
关键词 zinc smelting waste acid treatment life cycle assessment environmental impact
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Enhanced Biological Phosphorus Removal with Pseudomonas putida GM6 from Activated Sludge 被引量:9
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作者 CAI Tian-Ming GUAN Li-Bo +4 位作者 CHEN Li-Wei CAI Shu LI Xiao-Dan CUI Zhong-Li LI Shun-Peng 《Pedosphere》 SCIE CAS CSCD 2007年第5期624-629,共6页
The enhanced biological phosphorus removal (EBPR) method is widely adopted for phosphorus removal from wastewater, yet little is known about its microbiological and molecular mechanisms. Therefore, it is difficult t... The enhanced biological phosphorus removal (EBPR) method is widely adopted for phosphorus removal from wastewater, yet little is known about its microbiological and molecular mechanisms. Therefore, it is difficult to predict and control the deterioration of the EBPR process in a large-scale municipal sewage treatment plant. This study used a novel strain isolated in the laboratory, Pseudomonas putida GM6, which had a high phosphate accumulating ability and could recover rapidly from the deteriorated system and enhance the capability of phosphorus removal in activated sludge. Strain GM6 marked with gfp gene, which was called GMTR, was delivered into a bench-scale sequencing batch reactor (SBR) of low efficiency, to investigate the colonization of GMTR and removal of phosphorus. After 21 days, the proportion of GMTR in the total bacteria of the sludge reached 9.2%, whereas the phosphorus removal rate was 96%, with an effluent concentration of about 0.2 mg L^-1. In the reactor with the addition of GMTR, phosphorus was removed quickly, in 1 h under anaerobic conditions, and in 2 h under aerobic conditions. These evidences were characteristic of EBPR processes. Field testing was conducted at a hospital sewage treatment facility with low phosphorus removal capability. Twentyone days after Pseudomonas putida GM6 was added, effluent phosphorus concentration remained around 0.3 mg L^-1, corresponding to a removal rate of 96.8%. It was therefore demonstrated that Pseudomonas putida GM6 could be used for a quick startup and enhancement of wastewater biological phosphorus removal, which provided a scientific basis for potential large-scale engineering application. 展开更多
关键词 activated sludge COLONIZATION enhanced biological phosphorus removal Pseudomonas putida GM6
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Fluidized-Bed Bioreactor Applications for Biological Wastewater Treatment: A Review of Research and Developments 被引量:15
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作者 Michael J. Nelson George Nakhla Jesse Zhu 《Engineering》 SCIE EI 2017年第3期330-342,共13页
Wastewater treatment is a process that is vital to protecting both the environment and human health. At present, the most cost-effective way of treating wastewater is with biological treatment processes such as the ac... Wastewater treatment is a process that is vital to protecting both the environment and human health. At present, the most cost-effective way of treating wastewater is with biological treatment processes such as the activated sludge process, despite their long operating times. However, population increases have created a demand for more efficient means of wastewater treatment, Fluidization has been demonstrated to in- crease the efficiency of many processes in chemical and biochemical engineering, but it has not been widely used in large-scale wastewater treatment. At the University of Western Ontario, the circulating fluidized-bed bioreactor (CFBBR) was developed for treating wastewater. In this process, carrier particles develop a biofilm composed of bacteria and other microbes. The excellent mixing and mass transfer characteristics inherent to fluidization make this process very effective at treating both municipal and industrial wastewater. Studies of lab- and pilot-scale systems showed that the CFBBR can remove over 90% of the influent organic matter and 80% of the nitrogen, and produces less than one-third as much biological sludge as the activated sludge process. Due to its high efficiency, the CFBBR can also be used to treat wastewaters with high organic solid concentrations, which are more difficult to treat with conventional methods because they require longer residence times; the CFBBR can also be used to reduce the system size and footprint. In addition, it is much better at handling and recovering from dynamic loadings (i.e., varying influent volume and concentrations) than current systems. Overall, the CFBBR has been shown to be a very effective means of treating wastewa- ter, and to be capable of treating larger volumes of wastewater using a smaller reactor volume and a shorter residence time. In addition, its compact design holds potential for more geographically localized and isolat- ed wastewater treatment systems. 展开更多
关键词 WASTEWATER Biological wastewater treatment Fluidized-bed technology Fluidized-bed reactor Biological nutrient removal Bio-particles High-efficiency process
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Biological Nutrient Removal in a Full Scale Anoxic/Anaerobic/Aerobic/ Pre-anoxic-MBR Plant for Low C/N Ratio Municipal Wastewater Treatment 被引量:8
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作者 胡香 谢丽 +2 位作者 SHIM Hojae 张善发 杨殿海 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2014年第4期447-454,共8页
A novel full scale modified A2O (anoxic/anaerobic/aerobic/pre-anoxic)-membrane bioreactor (MBR) plant combined with the step feed strategy was operated to improve the biological nutrient removal (BNR) from low C... A novel full scale modified A2O (anoxic/anaerobic/aerobic/pre-anoxic)-membrane bioreactor (MBR) plant combined with the step feed strategy was operated to improve the biological nutrient removal (BNR) from low C/N ratio municipal wastewater in Southern China. Transformation of organic carbon, nitrogen and phosphorus, and membrane fouling were investigated. Experimental results for over four months demonstrated good efficiencies for chemical oxygen demand (COD) and NH4^+-N removal, with average values higher than 84.5%and 98.1%, re-spectively. A relatively higher total nitrogen (TN) removal efficiency (52.1%) was also obtained at low C/N ratio of 3.82, contributed by the configuration modification (anoxic zone before anaerobic zone) and the step feed with a distribution ratio of 1:1. Addition of sodium acetate into the anoxic zone as the external carbon source, with a theoretical amount of 31.3 mg COD per liter in influent, enhanced denitrification and the TN removal efficiency in-creased to 74.9%. Moreover, the total phosphate (TP) removal efficiency increased by 18.0%. It is suggested that the external carbon source is needed to improve the BNR performance in treating low C/N ratio municipal waste-water in the modified A^2O-MBR process. 展开更多
关键词 biological nutrient removal low C/N ratio wastewater membrane bioreactor DENITRIFICATION external carbon source
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Inhibitory effect of ammonia nitrogen on specific methanogenic activity of anaerobic granular sludge 被引量:6
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作者 周洪波 邱冠周 《Journal of Central South University of Technology》 EI 2006年第1期63-67,共5页
A series of batch experiments were conducted in 125 mL serum bottles to assess the toxicity of different concentrations of ammonia nitrogen to the specific methanogenic activity of anaerobic granular sludge from upflo... A series of batch experiments were conducted in 125 mL serum bottles to assess the toxicity of different concentrations of ammonia nitrogen to the specific methanogenic activity of anaerobic granular sludge from upflow anaerobic sludge bed(UASB) and expanded granular sludge bed(EGSB) reactors. The effects of pH value and temperature on toxicity of ammonia nitrogen to anaerobes were investigated. The results show that the specific methanogenic activity of anaerobic granular sludge suffers inhibition from ammonia nitrogen, the concentrations of ammonia nitrogen that produce 50 % inhibition of specific methanogenic activity for sludge from UASB and EGSB reactor are 2.35 and 2.75 g/L, respectively. Hydrogen utilizing methanogens suffers less inhibition from ammonia mtrogen than that of acetate utilizing methanogens. Hydrogen-producing acetogens that utilize propionate and butyrate as substrates suffer serious inhibition from ammonia nitrogen. The toxicity of ammonia nitrogen to anaerobic granular sludge enhances when pH value and temperature increase. Anaerobic granular sludge can bear higher concentrations of ammonia nitrogen after being acclimated by ammonia nitrogen for 7 d. 展开更多
关键词 ammonia nitrogen TOXICITY anaerobic granular sludge specific methanogenic activity
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Extractable Fractions of Metals in Sewage Sludges from Five Typical Urban Wastewater Treatment Plants of China 被引量:8
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作者 WANG Chao LI Xiao-Chen +2 位作者 WANG Pei-Fang ZOU Li-Min MA Hai-Tao 《Pedosphere》 SCIE CAS CSCD 2006年第6期756-761,共6页
Metal content and bioavailability are often the limiting factors for application of sewage sludge in agricultural fields. Sewage sludge samples were collected from five typical urban wastewater treatment plants in Chi... Metal content and bioavailability are often the limiting factors for application of sewage sludge in agricultural fields. Sewage sludge samples were collected from five typical urban wastewater treatment plants in China to investigate their contents and distribution of various chemical fractions of Cu, Zn, Ni, Cr, Pb and Mo by using the BCR (Community Bureau of Reference) sequential extraction procedure. The sludges contained considerable amounts of organic matter (31.8%- 48.0%), total N (16.3-26.4 g kg^-1) and total P (15.1-23.9 g kg^-1), indicating high potential agricultural benefits of their practical applications. However, total Zn and Ni contents in the sludge exceeded the values permitted in China's control standards for pollutants in sludges from agricultural use (GB 4284-1984). The residual fraction was the predominant fraction for Mo, Ni and Cr, the oxidizable fraction was the primary fraction for Cu and Pb, and the exchangeable and reducible fractions were principal for Zn. The distribution of different chemical fractions among the sludge samples refiected differences in their physicochemical properties, especially pH. The sludge pH was negatively correlated with the percentages of reducible fraction of Cu and exchangeable fraction of Zn. The sludges from these plants might not be suitable for agricultural applications due to their high contents of Zn, Ni and Cr, as well as high potential of mobility and bioavailability of Zn. 展开更多
关键词 FRACTIONS HEAVY METALS sequential extraction sewage sludge
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Biological treatment of high NH_4^+-N wastewater using an ammonia-tolerant photosynthetic bacteria strain (ISASWR2014) 被引量:3
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作者 周琴 张光明 +1 位作者 郑祥 刘国华 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2015年第10期1712-1715,共4页
Wastewater with high NH_4^+-N is difficult to treat by traditional methods.So in this paper,a wild strain of photosynthetic bacteria was used for high NH_4^+-N wastewater treatment together with biomass recovery.Isola... Wastewater with high NH_4^+-N is difficult to treat by traditional methods.So in this paper,a wild strain of photosynthetic bacteria was used for high NH_4^+-N wastewater treatment together with biomass recovery.Isolation,identification,and characterization of the microorganism were carried out.The strain was inoculated to the biological wastewater treatment unit.The impacts of important factors were examined,including temperature,dissolved oxygen,and light intensity.Results showed that photosynthetic bacteria could effectively treat high NH_4^+-N wastewater.For wastewater with NH_4^+-N of 2300 mg·L^(-1),COD/N=1.0,98.3%of COD was removed,and cell concentration increased by 43 times.The optimal conditions for the strain's cell growth and wastewater treatment were 30℃,dissolved oxygen of 0.5-1.5 mg·L^(-1) and a light intensity of 4000 lx.Photosynthetic bacteria could bear a lower C/N ratio than bacteria in a traditional wastewater treatment process,but the NH_4^+-N removal was only 20%-40%because small molecule carbon source was used prior to NH_4^+-N.Also,the use of photosynthetic bacteria in chicken manure wastewater containing NH4+-N about 7000 mg·L^(-1) proved that photosynthetic bacteria could remove NH_4^+-N in a real case,finally,83.2%of NH_4^+-N was removed and 66.3%of COD was removed. 展开更多
关键词 High NH4+-N wastewater C/N Photosynthetic bacteria Chicken manure wastewater
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Wastewater Treatment for Removal of Recalcitrant Compounds:A Hybrid Process for Decolorization and Biodegradation of Dyes 被引量:11
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作者 Carolyn Palma Andrea Carvajal +1 位作者 Carlos Vasquez Elsa Contreras 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2011年第4期621-625,共5页
While conventional wastewater treatments for urban effluents are fairly routine and have proved highly effective,industrial wastewater requires more complex and specific treatments.This paper provides a technological ... While conventional wastewater treatments for urban effluents are fairly routine and have proved highly effective,industrial wastewater requires more complex and specific treatments.This paper provides a technological strategy for removal of recalcitrant contaminants based on a hybrid treatment system.The model effluent containing a binary mixture of synthetic dyes is treated by a combination of a preliminary physicochemical stage followed by a biological stage based on ligninolytic enzymes produced by Phanerochaete chrysosporium.This proposal includes biosorption onto peat as pretreatment,which decreases the volume and concentration to be treated in the biological reactor,thereby obtaining a completely decolorized effluent.The treated wastewater can therefore be reused in the dyeing baths with the consequent saving of water resources. 展开更多
关键词 wastewater hybrid and advanced treatment BIOPROCESS
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Technical Innovation of Land Treatment Systems for Municipal Wastewater in Northeast China 被引量:8
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作者 ZHOU Qi-Xing ZHANG Qian-Ru SUN Tie-Heng 《Pedosphere》 SCIE CAS CSCD 2006年第3期297-303,共7页
On the basis of ecological principles including holistic optimization, cycling and regeneration, and regional differentiation, land treatment systems (LTSs) for municipal wastewater were continuously explored and upda... On the basis of ecological principles including holistic optimization, cycling and regeneration, and regional differentiation, land treatment systems (LTSs) for municipal wastewater were continuously explored and updated in the western Shenyang area and the Huolinhe area, China. Intensified pretreatment, addition of a man-made soil filtration layer, and use of an ecologically diversified secondary plant cover were proved to be technically feasible. Hydraulic loading was determined according to the assimilation capacity of soil ecosystems, thus ensuring safe operation of wastewater treatment. This modernized and alternative approach to wastewater treatment had been widely applied in middle-sized and small cities and towns of Northeast China, and these innovative systems in some areas had indicated favorable ecological, social, and economic benefits. 展开更多
关键词 land treatment system municipal wastewater soil ecosystem soil purification
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Synergism of Novel Sequence Bio-ecological Process and Biological Aerated Filter for Sewage Treatment in Cold Climate 被引量:3
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作者 张鹏 海热提 +2 位作者 周东凯 何一群 白志远 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2011年第5期881-890,共10页
A lab-scale integrated treatment system including the novel sequence bio-ecological process (SBEP) and biological aerated filter (BAF) for a sewage mixture (chemistry laboratory wastewater and domestic sewage) w... A lab-scale integrated treatment system including the novel sequence bio-ecological process (SBEP) and biological aerated filter (BAF) for a sewage mixture (chemistry laboratory wastewater and domestic sewage) was presented in this paper. The main objective of the study was to test the contribution of artificial aeration, recir-culation ratio and mass concentration of steel slag on pollutant removal in winter when the plants are dormant. It had been shown that SBEP and BAF play different roles in removing contaminants from wastewater. During the airflow experiment, the removal efficiency of COD and TP in SBEP was higher than that in BAF, whereas BAF can compensate for the deficiency of SBEP where no significant improvement on ammonium nitrogen removal is ob-served. Yet, the removal etticiencies of COD,TP and NH4^+ -N in SBEP could be improved apparently when ditterent recireulation ratio or various mass concentration of steel were applied. Especially, when the airflow of 0.06 L·h^-1, the recirculation ratio rate of 80% and the mass concentration of steel of 2.2-2.4 g·L^-1 were applied, thehighest efficiency of 94.6%, 77.9% and 80.7% for COD, TP and NH4^+ -N were achieved,-respectively,The integrated treatment system of SBEP and BAF was proved to be an effective wastewater treatment technique and a better alternative to treat domestic sewage. 展开更多
关键词 vertical subsurface constructed wetlands biological aerated filter bio-contact oxidation process car-bon fiber AERATION recirculation ratio
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Performance of BAC process for treatment of micro-polluted water 被引量:1
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作者 王晨 马放 +2 位作者 山丹 杨基先 张建祺 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2008年第2期194-197,共4页
Biological activated carbon (BAC) has been developed on the granular activated carbon by immobilization of selected and acclimated species of bacteria to treat the micro-polluted water. The BAC removal efficiencies fo... Biological activated carbon (BAC) has been developed on the granular activated carbon by immobilization of selected and acclimated species of bacteria to treat the micro-polluted water. The BAC removal efficiencies for nitrobenzene, permanganate index, turbidity and ammonia were investigated. Effects of shock loading and SEM (Scanning Electron Microscope) observation on BAC were studied. Backwashing and its intensity of BAC were also discussed. The results showed that BAC took short time to start up and recover to the normal condition after shock loading. The shock loading studies showed that the removal efficiency of BAC was not completely inhibited even at high concentration of nitrobenzene. Backwashing performed once every 10-20 d, or an average of 15 d. Backwashing intensity was 12-14 L/(s·m2) with air and 3-4 L/(s·m2) with water. 展开更多
关键词 NITROBENZENE biological activated carbon micro-polluted water
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Analysis of Circumstance Influence Factors on HMBR for Waste-water Reclamation in Dwelling District
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作者 常颖 汪永辉 +2 位作者 薛罡 郭美芳 王宝贞 《Journal of Donghua University(English Edition)》 EI CAS 2003年第3期78-83,共6页
Circumstance influence factors on Hybrid Membrane Bio-Reactor (HMBR) process for the wastewater reclamation in dwelling district was analyzed. The main characteristic of this process is that sludge and nitrified efflu... Circumstance influence factors on Hybrid Membrane Bio-Reactor (HMBR) process for the wastewater reclamation in dwelling district was analyzed. The main characteristic of this process is that sludge and nitrified effluent can be recycled automatically, which simplifies the operation of system and is beneficial to get the high removal of organics and nitrogen. Based on the analysis of circumstance influence factors, it is recommended that water temperature of about 20℃, influent pH of 6 -7 and DO of 1. 0 mg/L - 1. 5 mg/L in the aerobic compartment. Under these conditions, COD, BOD5, NH4+ -N, and TN were removed effectively in HMBR and the average removal efficiencies were 94.5%, 99.3%, 99.4% and 84.7%, respectively. SS and coliforms were both below the detection limits in the permeate of UF membrane module, and turbidity was less than 1NTU. The treated effluent meets the Miscellaneous Domestic Water Quality Standard (CJ25.1-89), and can be reused multipurposely such as watering of green belts, cleaning and toilet flushing water after disinfection. 展开更多
关键词 wastewater reclamation in dwelling district Hybrid Membrane Bio-Reactor TEMPERATURE DO PH
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Advances in Energy-Producing Anaerobic Biotechnologies for Municipal Wastewater Treatment 被引量:5
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作者 Wen-Wei Li Han-Qing Yu 《Engineering》 SCIE EI 2016年第4期438-446,共9页
Municipal wastewater treatment has long been known as a high-cost and energy-intensive process that destroys most of the energy-containing molecules by spending energy and that leaves little energy and few nutrients a... Municipal wastewater treatment has long been known as a high-cost and energy-intensive process that destroys most of the energy-containing molecules by spending energy and that leaves little energy and few nutrients available for reuse, Over the past few years, some wastewater treatment plants have tried to revamp themselves as "resource factories," enabled by new technologies and the upgrading of old technologies. In particular, there is an renewed interest in anaerobic biotechnologies, which can convert organic matter into usable energy and preserve nutrients for potential reuse. However, considerable technological and economic limitations still exist. Here, we provide an overview of recent advances in several cutting-edge anaerobic biotechnologies for wastewater treatment, including enhanced side- stream anaerobic sludge digestion, anaerobic membrane bioreactors, and microbial electrochemical systems, and discuss future challenges and opportunities for their applications. This review is intended to provide useful information to guide the future design and optimization of municipal wastewater treatment processes. 展开更多
关键词 ANAEROBIC ENERGY Membrane bioreactor Microbial electrochemical system Municipal wastewater treatment
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