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1.
辛韦 《中国水利》2010,(9):69-69
<正>陶氏水处理及过程解决方案业务部下属的浙江欧美环境工程有限公司(以下简称陶氏欧美)为北京高井电厂的污水回用项目建设了三期污水处理回用系统,帮助高井电厂实现了冷却塔污水的回收利用。依托陶氏水处理及过程解决方案业  相似文献   

2.
正重庆优楷科技有限公司是一家集机械自动化、环境保护、节能等领域原创技术研发、专利设备生产、工艺设计、技术咨询和技术服务及产品和服务产业化、市场化为一体的高新技术企业。2013年以来,公司加大对洗车污水处理和回用方面的研究,并取得了重要突破,成功研制出"用于污水处理过程中的离心射流装置""电加工污水处理循环回用系统""水体内臭氧发生器"等污水净化处理和循环使用装置,有4项发明获得了专利。其中"电加工污水处理循环回用系统"先后被重庆  相似文献   

3.
远离市政污水处理设施的零星生活污水排放与民众对生活环境要求日益提高之间的矛盾,随着城镇化进程的不断加快越来越凸显。南通市小海中学对生活污水"零排放"模式进行了探索。一、提高标准设计,对学校生活污水处理回用模式"提档升级",建立全面的中水回用系统,除与人体直接接触的水源外,使用中水回用系统(含冲厕、  相似文献   

4.
浅谈我国污水处理及污水资源化   总被引:9,自引:1,他引:8       下载免费PDF全文
介绍了国内外污水处理及回用的现状,重点介绍了现阶段我国北京、大连、深圳等城市污水处理厂和回用工程的情况,对我国在污水回用方面存在的对污水处理和回用的认识不足、污水处理和回用项目的启动缺少资金而且经验不足、污水处理与回用的配套设施不完善等问题进行了探讨,说明我国开发利用城市第二水资源———污水资源,将从根本上解决城市水资源匮乏的局面,实现污水资源化,对保障城市安全供水,缓解水危机具有重要的战略意义。  相似文献   

5.
污水资源化利用技术现状及其应用实例   总被引:22,自引:0,他引:22  
综述了国内外生活污水的资源化利用技术研究现状 ,通过对污水处理技术的实用性和污水回用风险的分析 ,认为膜生物反应器是污水处理技术的重要发展方向 ,工业回用和中水回用是首选的资源化利用方向。  相似文献   

6.
城市污水回用问题分析   总被引:13,自引:0,他引:13       下载免费PDF全文
城市污水回用可以缓解水资源短缺问题。在分析城市污水回用的必要性和可行性的基础上,强调污水回用技术的重要意义。重点评述了污水回用的途径和目前存在的问题:污水处理水平较低,污水灌溉理论研究滞后,水价偏低阻碍回用水技术推广等。  相似文献   

7.
山东省作为经济大省,在水资源匮乏的情况下,污水处理回用已成为水资源开源、节流和保护的重要措施。结合实际,通过制度并实施污水处理回用规划,拓展污水处理回用出路,以及运用法制,经济手段,促进污水处理回用,充分发挥污水资源化利用在水资源配置中的作用。  相似文献   

8.
呼市城市污水处理规划与中水回用分析   总被引:1,自引:0,他引:1  
介绍了呼市城市污水处理现状及污水处理规划,从技术、经济方面进行了污水回用的可行性分析,阐述了呼市开发、利用污水资源的意义,并对中水回用工作的开展提出了几点措施性建议。  相似文献   

9.
污水回用 大势所趋——关于北京市污水回用的思考   总被引:1,自引:0,他引:1  
我国是世界上高度缺水的国家之一,首都北京也面临着日益严重的水危机,污水回用是解决水危机的有效途径,污水经过处理可回用于农业灌溉,景观河道用水,市政用水,工业水和地下水回灌等多个方面。本文介绍了国际上一些国家进行污水回有的经验,同时还介绍了北京市污水处理与回用现状,并分析了污水回用过程中存在的问题,针对这些问题提出了改进建议。  相似文献   

10.
西安市城市污水处理及其再生利用   总被引:4,自引:1,他引:3  
吴键  张理  王社平 《给水排水》2003,29(2):13-18
介绍了西安市城市污水处理的现状、规划以及西安市近期实施的污水处理厂和回用水工程 ,阐述了西安市城市污水回用试点项目的基础条件、试验研究、设计与实施。污水是一种潜在的水资源 ,应引起足够重视 ;回用水市场开拓初期 ,用户发展、价格政策很重要 ,国家和地方政府应给予政策支持 ;城市规划、建设、管理部门要按照可持续发展的战略思想 ,综合考虑污水处理与污水资源的开发与利用 ;回用水项目的运营管理要遵循市场规律 ,回用水的定价要考虑供水单位效益、用水单位承受能力和现行物价水平 ,以便更好地推进污水资源化工作  相似文献   

11.
立体种植条件下作物需水规律研究   总被引:11,自引:1,他引:10  
提出了立体条带种植高效用水中存在的问题,对其中作物需水量和产量计算关键性问题进行了初步研究。在考虑冠层、根系分布和土壤水分分布等特点的基础上,为了充分利用已有的单作种植作物需水量和水分生产函数研究成果,引入需水量和产量计算修正系数概念,提出了立体条带种植条件下作物需水量和产量计算模式。以山西省黎城县漳北渠灌区灌溉试验站1998年度进行的冬小麦套种玉米复播甘蓝立体种植模式试验结果为实例,分析得出了该立体种植模式中各作物的需水量和产量计算修正系数。结果表明本文所提出的计算方法是可行的。  相似文献   

12.
在中澳合作FILTER项目中有大量的试验数据需要远程无线传输。而澳方提供的软件不能很好的满足要求。文中阐述了如何通过使用VB来实现试验数据的远程无线传输的方法。  相似文献   

13.
Water resources sustainability has the main contribution to the existence and durability of the farming systems and strongly depends on the cropping pattern practices. A comprehensive cropping pattern planning takes in to account the high level of interrelation of the environmental, economic and social aspects of farming systems. In order to assess the sustainability of water resources and determine an optimal pattern of cropping in a rural farming system, this paper introduces two ratios of “net return/water consumption” and “labor employment/water consumption” and attempts to simultaneously optimize them as the sustainability indicators. To this purpose, a multi-objective fractional goal programming (MOFGP) procedure is considered as the main approach of the study to be accomplished by several other single and multi-objective linear and fractional programming models. The results show that the FP models are more significant to contribute in assessing the sustainability indicators compared to the LP models, and the MOFGP solution is considered better, compared to the single objective FP solutions. The results will be illustrated quantitatively.  相似文献   

14.
为探究华北平原不同种植模式的作物耗水与生产能力以评价其缓解地下水超采的潜力,于2021—2022年在中国农业科学院北京市顺义试验站进行了冬小麦-夏玉米、冬小麦-夏大豆和冬小麦-夏休闲3种种植模式的对比试验。利用大型称重式蒸渗仪监测各种植模式的蒸散、土壤储水和渗漏,使用FAO-56推荐的双作物系数法估算不同种植模式的蒸散量,同时分析了估算效果和蒸散与环境的响应特征,并比较不同种植模式的水分利用效率和产量、效益的相对关系。结果表明:3种种植模式的实测蒸散量与净辐射呈指数函数关系、与气温呈二次函数关系、与水汽压差呈线性函数关系,可以使用双作物系数法或非线性拟合公式较好地估算不同种植模式的蒸散量;冬小麦-夏玉米种植模式的产量、水分利用效率和经济效益最高,耗水量也最高,地下水净消耗量为197.52 mm,而冬小麦-夏休闲模式净地下水消耗量最小,比冬小麦-夏玉米模式低72.28%。未来需要结合华北平原不同区域可利用和开采的地表水、地下水资源量和土壤储水能力以及作物耗水量优化作物种植模式,以达到地下水的采补平衡。  相似文献   

15.
The performance of a constructed wetland (CW) and wastewater stabilisation pond (WSP) system for sewage reclamation and paddy rice irrigation in a decentralised rural area was examined using a feasibility study. The CW was satisfactory for sewage treatment, with good removal efficiency even in the winter period, but the effluent concentration was relatively high in the winter period owing to the high influent concentration. The CW effluent was further treated in a WSP and the WSP effluent was considered safe for crop irrigation with respect to sewage-borne pathogens. Reclaimed water irrigation did not adversely affect the yield of rice; on the contrary, it resulted in an approximately 50% greater yield than in controls. The chemical characteristics of the soil did not change significantly during the experimental period of irrigation with reclaimed water. In the winter, CW effluent could be stored and treated in a WSP until the spring; the water could then be discharged or reused for supplemental irrigation during the typical Korean spring drought. Overall, sewage treatment and agronomic reuse using a CW-WSP system could be a practical integrated sewage management measure for protecting receiving water bodies and overcoming water shortages in decentralised rural areas.  相似文献   

16.
Amer Z. Salman 《国际水》2013,38(2):220-224
Abstract

In the Jordan Valley of Jordan, the demand for water and ability to control its location, timing, quality, and quantity are becoming critical. The competition for water between the urban and agricultural sectors is increasing. There is a general trend in Jordan to reduce water allocated for agricultural use. Increasing the price of irrigation water or restricting the planted areas of water consuming crops, such as bananas, has been implemented during the recent growing season. The main objective of this paper is to highlight the impact of optimal allocation of irrigation water by building storage capacity on the economy of Jordan Valley. A linear programming technique is used, and the main results show that for proper management of water storage capacity, the suggested cropping pattern would generate $88.2 million, whereas the actual cropping pattern generated $74.4 million. The optimal water demand schedule is distributed according to the needs of the planted crops, and water demand has been allocated in an efficient way. In addition, appropriate management of storage capacity has solved the problem of water scarcity during the summer months, when peak production takes place. Storage-transfer system between locations played a significant role in reallocating irrigation water through the storage system. This compensates to a high degree in keeping the agricultural production more stable in physical and monetary units.  相似文献   

17.
通过多级人工湿地-塘组合系统在不同的水力停留时间下处理污染水体,对各项出水污染物进行测试对比。结果表明:在初春低温条件下,COD,TN和NH_4~+-N的去除率随着水力停留时间的增加显著提高,在保证处理效果的前提下,水力停留时间选择4 d较为合理。在水力停留时间为4 d时进行为期12个月的试验。试验结果表明:随着季节的变化,多级人工湿地-塘组合系统对模拟农村径流污水的净化效果保持在一个合理的波动范围内,在夏季时对污水中COD,TN以及NH_4~+-N去除效果比在冬季时好。从试验去除污染物的效果可以看出,本系统可以在除污染物方面达到比较令人满意的效果,COD出水水质最好时为Ⅳ类水质,NH_4~+-N出水水质最好时接近地表水Ⅳ类水质。  相似文献   

18.
The canal water supply, which is the only source of irrigation, in the rice-dominated cropping system of the Hirakud canal command (eastern India) is able to meet only 54 % of the irrigation demand at 90 % probability of exceedance. Hence, considering groundwater as the supplemental source of irrigation, conjunctive use management study by combined simulation-optimization modelling was undertaken in order to predict the maximum permissible groundwater pumpage from the command area. Further, optimal land and water resources allocation model was developed to determine the optimal cropping pattern for maximizing net annual return. The modelling results suggested that 2.0 and 2.3 million m3 of groundwater can be pumped from the bottom aquifer during monsoon and non-monsoon seasons, respectively, at 90 % probability of exceedance of rainfall and canal water availability (PERC). Optimal cropping patterns and pumping strategies can lead to about 51.3–12.5 % increase in net annual return from the area at 10–90 % PERC. The sensitivity analysis of the model indicates that the variation in the market price of crops has very high influence on the optimal solution followed by the cost of cultivation and cultivable area. Finally, different future scenarios of land and water use were formulated for the command area. The adoption of optimal cropping patterns and optimal pumping strategies is strongly recommended for sustainable management of available land and water resources of the canal command under hydrological uncertainties.  相似文献   

19.
The quality of effluent from an on-site sewage treatment system is a critical factor in designing the disposal area and, hence, ensuring the sustained performance of the system. Contaminant concentrations in effluent are typically specified in regulatory guidelines or standards; however, the accuracy of these guideline values are brought into question due to the poor performance of septic tanks and the high failure rates of disposal systems reported here and elsewhere. Results from studies of septic tank effluent quality indicated that the effluent is of poorer quality than currently suggested by guidelines. Aerated wastewater treatment systems were found to perform to accreditation guidelines; however, insufficient nutrient data is presently available to assess nutrient loads. It is proposed that the 80th percentile of system performance be adopted as the design value for sizing effluent disposal areas to minimise failure associated with overloading. For septic tanks this equates to 660 mg L(-1) SS, 330 mg L(-1) BOD, 250 mg L(-1) TN and 36 mg L(-1) TP.  相似文献   

20.
This paper analyzes irrigation-poverty linkages, and determines how and to what extent irrigation contributes to poverty alleviation, and whether there are any spatial patterns in poverty in irrigation systems. It also identifies conditions under which irrigation has greater anti-poverty impacts. The analysis is based on primary data collected during the 2000--2001 agricultural year, from four selected irrigation systems and rainfed areas in Java. The results indicate that irrigation has significant poverty reducing impacts. Poverty varies across irrigation systems and across locations within the systems. In general, crop productivity is relatively higher and poverty is lower in middle parts of the systems compared to head and tail parts. Further, locational differences in poverty are more pronounced in larger systems where locational inequities in water distribution and productivity differences are also high. Crop productivity, the size of landholdings and location of households are important determinants of poverty, in addition to demographic factors such as family size. The smaller the systems with well managed infrastructure, relatively equitable water distribution and diversified cropping patterns supported with market infrastructure, the greater the poverty reducing impacts of irrigation. Overall, the study findings suggest that improving the performance of irrigation systems by enhancing land and water productivity, diversifying cropping patterns and improving water distribution across locations would help reduce poverty in presently low productivity-high poverty parts of the systems.  相似文献   

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