[ Objective] The study aimed to test capacity of sewage treatment with anaerobic ＋ artificial wetland. [ Method] By studying on the removal of conventional pollutants such as CODcr, SP, TP and NH4^＋-N with new wetla...[ Objective] The study aimed to test capacity of sewage treatment with anaerobic ＋ artificial wetland. [ Method] By studying on the removal of conventional pollutants such as CODcr, SP, TP and NH4^＋-N with new wetlands, their impact on the capacity of sewage treatment. [Resuit]The CODcr removal efficiency could reach 70% -80% and the value of CODcr could be reduced from above 300.00 mg/L to blow 100 mg/L, the removal efficiency of SP and NH4^＋-N was 30% -40% when hydraulic load is 90 crn/d. [ Conclusion] When the concentration of CODcr, SP and NH4^＋ -N were below 300.00,2.50 and 15.00 mg/L, it＇s easy to achieve a more stable removal efficiency.展开更多
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
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
[Objection] The aim was to study application of channels constructed wetland in treatment of domestic sewages in new countryside. [Method] Supported by construction of new rural areas project in China, we surveyed on ...[Objection] The aim was to study application of channels constructed wetland in treatment of domestic sewages in new countryside. [Method] Supported by construction of new rural areas project in China, we surveyed on new rural areas in Gannan, Jiangxi Province, summarized source, characteristics and treatment of domestic sewage in countryside, and designed channels constructed wetland for sewage treatment. [Result] The technique is proven effective in sewage treatment. After the technique was conducted for a trial run for four months, removal rates of COD, TP and TN averaged 73.07%, 73.25% and 72.36%, respectively. After contin- uous sampling for six times, effluent COD was analyzed 20-35 mg/L, TP was 0.60- 1.19 mg/L and TN was 6.88-11.21 mg/L, better than that of Standard 1B ruled by Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant. [Conclusion] Thanks for low investment, channels constructed wetland can be built by trans- formation of bottom land, proving a good way for treatment of diffuse pollution source and control of water non-point pollution.展开更多
The ability of some Tunisian sand-clays in rural wastewater treatment was investigated in this study. The sand-clays were characterized by studying the mineralogical and geochemical characteristics using X-ray diffrac...The ability of some Tunisian sand-clays in rural wastewater treatment was investigated in this study. The sand-clays were characterized by studying the mineralogical and geochemical characteristics using X-ray diffractometer and atomic absorption spectrophotometer （AAS）, respectively. Performance efficiency studies were conducted to determine the best combination ratio of sand-clay/pebbles. Sand-clay fortified with pebbles in the ratio 3：1 gave the optimum water purification while combination ratio 1：3 gave the least. The fortified sand-clays were used in the treatment of wastewater from rural locality. On the other hand, bacteria play an important role in determining the properties and behavior of clay minerals in natural environments and such interactions have great potential for creating stable biofilms and carbon storage sites in soils, but our knowledge of these interactions are far from complete. The purpose of this study was to understand better the effects of bacteria-generated biofilms on clay interlayer expansion. Mixtures of a colloidal, 2-water smectite clay and Pseudomonas aereginosae in a minimal media suspension evolve into a polysaccharide-rich biofilm aggregate in time-series experiments lasting up to 1 week. X-ray diffraction analysis reveals that upon aggregation, the clay undergoes an initial interlayer contraction.展开更多
文摘[ Objective] The study aimed to test capacity of sewage treatment with anaerobic ＋ artificial wetland. [ Method] By studying on the removal of conventional pollutants such as CODcr, SP, TP and NH4^＋-N with new wetlands, their impact on the capacity of sewage treatment. [Resuit]The CODcr removal efficiency could reach 70% -80% and the value of CODcr could be reduced from above 300.00 mg/L to blow 100 mg/L, the removal efficiency of SP and NH4^＋-N was 30% -40% when hydraulic load is 90 crn/d. [ Conclusion] When the concentration of CODcr, SP and NH4^＋ -N were below 300.00,2.50 and 15.00 mg/L, it＇s easy to achieve a more stable removal efficiency.
基金Supported by the National Eleventh Five-year Water Major Project(2008ZX07101-007-01)Soft Science Research Project of Jiangsu Province(BR2009003)~~
文摘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.
文摘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.
基金Supported by Project of the National Eleventh-Five Year Research Program of China(2008BAD96B04)~~
文摘[Objection] The aim was to study application of channels constructed wetland in treatment of domestic sewages in new countryside. [Method] Supported by construction of new rural areas project in China, we surveyed on new rural areas in Gannan, Jiangxi Province, summarized source, characteristics and treatment of domestic sewage in countryside, and designed channels constructed wetland for sewage treatment. [Result] The technique is proven effective in sewage treatment. After the technique was conducted for a trial run for four months, removal rates of COD, TP and TN averaged 73.07%, 73.25% and 72.36%, respectively. After contin- uous sampling for six times, effluent COD was analyzed 20-35 mg/L, TP was 0.60- 1.19 mg/L and TN was 6.88-11.21 mg/L, better than that of Standard 1B ruled by Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant. [Conclusion] Thanks for low investment, channels constructed wetland can be built by trans- formation of bottom land, proving a good way for treatment of diffuse pollution source and control of water non-point pollution.
文摘The ability of some Tunisian sand-clays in rural wastewater treatment was investigated in this study. The sand-clays were characterized by studying the mineralogical and geochemical characteristics using X-ray diffractometer and atomic absorption spectrophotometer （AAS）, respectively. Performance efficiency studies were conducted to determine the best combination ratio of sand-clay/pebbles. Sand-clay fortified with pebbles in the ratio 3：1 gave the optimum water purification while combination ratio 1：3 gave the least. The fortified sand-clays were used in the treatment of wastewater from rural locality. On the other hand, bacteria play an important role in determining the properties and behavior of clay minerals in natural environments and such interactions have great potential for creating stable biofilms and carbon storage sites in soils, but our knowledge of these interactions are far from complete. The purpose of this study was to understand better the effects of bacteria-generated biofilms on clay interlayer expansion. Mixtures of a colloidal, 2-water smectite clay and Pseudomonas aereginosae in a minimal media suspension evolve into a polysaccharide-rich biofilm aggregate in time-series experiments lasting up to 1 week. X-ray diffraction analysis reveals that upon aggregation, the clay undergoes an initial interlayer contraction.
