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1.
对乌鲁木齐市城镇污水处理厂主要污染物的排放量进行统计,并对主要减排因子化学需氧量和氨氮的处理效率及减排量进行核算,及时掌握和了解城镇污水处理厂的废水达标排放和减排效果,为环境管理提供准确的科学依据。  相似文献   

2.
通过对上海市3家城镇污水处理厂主要污水处理工艺臭气收集处理装置进出口有组织排放和二沉池等敞开液面无组织排放氨采样,研究污水处理厂氨气排放特征,建立污水处理厂分季节本地化氨排放系数,并计算2019年上海市城镇污水厂氨排放量。结果表明:3家污水处理厂氨排放系数平均为4.8 mg/m3,其中污水处理环节氨排放系数为3.3 mg/m3,污泥处理环节氨排放系数为1.5 mg/m3。2019年上海市城镇污水处理厂氨排放量为10.3 t。  相似文献   

3.
文章围绕青海省城镇污水处理厂污泥中生物种类繁多的特点,提出了通过物理、化学、生物方法对污水处理厂污泥中的污染物进行处理并综合利用。  相似文献   

4.
我国城镇污水处理厂污泥处置问题研究   总被引:1,自引:0,他引:1  
介绍了我国城镇污水处理厂污泥处置现状,阐述在城镇污水处理厂污泥处置过程中存在的问题,对如何解决这些问题进行了研究,提出相应对策措施.  相似文献   

5.
比较了GB18918—2002《城镇污水处理厂污染物排放标准》与相关行业和国家标准的特点,指出执行GB18918—2002《城镇污水处理厂污染物排放标准》的关键应是充分了解和掌握被执行对象所处的地理位置、建厂年限、处理工艺、污染物排放去向及用途等基本信息。提出选择控制项目的确定、监测能力的开发、大气污染物的配套治理手段和超标项目的配套管理办法是执行GB189182002《城镇污水处理厂污染物排放标准》时尚需深入解决的问题。  相似文献   

6.
污水处理厂出水中主要离子和重点元素的浓度特征及去除效果会影响受纳水体的盐度、碱度等指标,从而影响河湖的生态服务功能,但是这方面的研究长期以来未得到充分关注。在陕西省全境选择51家城镇污水处理厂,测定进水和出水中的钾、钙、钠、镁、氟、氯和硫酸根离子,以及铁、锰、硼、钼、锶等重点元素的浓度。测定结果显示:陕西省城镇污水处理厂进水和出水中的阳离子以钠离子为主,其次是钙、镁离子,钾离子浓度最低;阴离子中,氯离子浓度最大,其次为硫酸根离子。就总离子浓度而言,陕北和关中地区污水处理厂进水的离子浓度普遍高于陕南地区。相关性分析结果显示:在污水处理厂进水中,钠、氟、氯、镁及硫酸根离子相互之间均呈现显著正相关关系;铁、锰在进水中没有表现出明显的相关关系,而在出水中呈现显著的正相关关系。污水处理厂仅能够处理污水中少量的氟、钾和镁离子。铁元素和锰元素在经过污水处理厂的处理后,浓度有所升高。此研究的研究结果可为河湖水化学组成管理决策提供参考。  相似文献   

7.
经江苏省政府同意,江苏省政府办公厅近日转发了由省物价局、财政厅、环保厅、经贸委共同制定的《江苏省太湖流域污水处理单位氨氮、总磷超标排污费收费办法》(以下简称《收费办法》),确定从2008年9月11日起,正式开征南京、无锡、常州、苏州、镇江等地沿太湖的新建城镇污水处理厂氨氮、总磷超标排污费。从2009年1月1日起,开征太湖流域所有老的城镇污水处理厂氨氮、总磷超标排污费。  相似文献   

8.
从2007年6月11日在无锡召开的太湖流域水污染防治座谈会上获悉,太湖流域水污染防治中的污水厂建设、企业达标排放等关键性项目排定时间表,凡是不能按时达标的企业将被淘汰出局。主要规定有:2008年6月底前,太湖流域所有城镇都必须建设符合标准的污水处理厂,完善管网铺设,做到不直接向太湖或流域内的河流排污水;已经建成的污水处理厂,  相似文献   

9.
从资料核查、在线监测设备核查、集控系统核查及现场核查4个环节详细介绍了火电厂总量减排现场核查的要点。对核查中出现的问题进行总结及分析,为同类环境管理工作提供参考。  相似文献   

10.
通过两次采集北京某大型污水处理厂的水样,采用HPLC-MS技术对水样中的10种PPCPs进行分析.结果显示,进水口水样中PPCPs浓度为7122.92ng/L,其中咖啡因的检出浓度最高(4490.54ng/L),污水处理厂对咖啡因的去除率大于90%(浓度为78.01ng/L).与文献报道值比较发现,该污水处理厂出水水样中PPCPs的浓度与其他国家报道的浓度基本上处于同一数量级,但污水中PPCPs的去除率都普遍低于国际水平.因此,需加强对污水处理厂水样中PPCPs的监测,完善污水处理的工艺.  相似文献   

11.
为了准确评估厌氧-缺氧-好氧(A2/O)处理工艺对废水毒性的削减效率,采用斑马鱼胚胎急性毒性实验、发光细菌急性毒性实验和小鼠L929细胞毒性实验进行测试,结合理化指标,通过毒性当量(TU)法、平均毒性(AvTx)法、毒性指数(TxPr)法、最敏感测试(MST)法和潜在生态毒性效应(PEEP)法对常州市6家污水处理厂(生活污水、综合废水、化工废水、制药废水)进水和出水的生物毒性进行了评价。结果表明,斑马鱼胚胎的毒性敏感程度最高,3种受试生物的毒性评价结果具有较好的一致性。理化达标的污水处理厂出水仍存在一定的生物毒性效应,出水毒性较大的是综合污水处理厂,排入受纳水体后可能会对周围的生态环境产生潜在的生态风险。A2/O处理工艺对各污水处理厂进水的毒性削减较好,其中对制药废水的毒性削减最高,AvTx、TxPr、MST和PEEP的毒性削减率分别为99.45%、99.64%、99.48%和69.66%。与AvTx、TxPr、MST法相比,PEEP法能够更综合地评价废水毒性。  相似文献   

12.
Insufficient wastewater remediation in small communities and nonpoint source pollution are the key factors in determining the water quality of small streams in an agricultural landscape. Despite the current extensive construction of municipal wastewater treatment facilities in small communities, the level of organic substances and nutrients in the recipient catchments has not decreased in many areas. This paper analyzes the changes in the water quality of the small streams after the deployment of wastewater treatment plants that were designed to address sources of pollution from small municipalities. The analysis is based on the results from a water quality monitoring network in the small watersheds in the Czech Republic. Five rural catchments with one dominant municipal pollution source, where a wastewater treatment plant was deployed during the monitoring period, were selected according to a predefined set of criteria, from a series of 317 profiles. Basic water quality indicators were selected for the assessment: O2, BOD-5, COD, TOC, conductivity, NH4-N, NO2-N, NO3-N, PT, and PO4-P. Results of the analysis showed that the simple deployment of the water treatment facilities at these streams often did not lead to a reduction of contamination in the streams. The expected post-deployment changes, namely, a significant and permanent reduction of stream contamination, occurred only in one catchment, whereas in the remainder of the catchments, only marginal changes or even increased concentrations of the contaminants were detected. As the critical factors that determined the efficiency of wastewater treatment were studied, the need for the consideration of the local conditions during the design of the facility, particularly regarding the size of the catchments, initial level of contamination, proper system of operation, and process optimization of the treatment facility, emerged as the important factor.  相似文献   

13.
Agriculture in Tunisia faces acute problems of water quality and quantity caused by limited conventional water resources. One possibility to cope with low water resources is to purify wastewater for reuse. Among different methods for the disinfection of wastewater, the inactivation of fecal coliforms using a combination of a photosensitiser (Rose Bengal, Methylene Blue, cationic porphyrin) with sunlight was determined on a small scale. In parallel the sensitizer photobleaching was also followed under the same conditions. The results described in this paper show that the meso-substituted cationic porphyrin is more efficient and more photostable than Methylene Blue and Rose Bengal in wastewater. A lower cationic porphyrin concentration, 1 microM, resulted in very little cell death. Higher concentrations, 5 microM or 10 microM, produced more cell death. Nevertheless there was a small difference between concentrations 5 and 10 microM. By increasing the duration of irradiation we can improve the log reduction in bacteria and compensate for a low concentration of sensitizer or for a less efficient type of sensitizer. The same log reduction in fecal bacteria was obtained with 5 and 10 microM of cationic porphyrin during the fourth hour of treatment.  相似文献   

14.
Wastewater reuse can significantly reduce environmental pollution and save the water sources. The study selected Cheng-Ching Lake water treatment plant in southern Taiwan to discuss the feasibility of wastewater recycling and treatment efficiency of wastewater treatment units. The treatment units of this plant include wastewater basin, sedimentation basin, sludge thickener and sludge dewatering facility. In this study, the treatment efficiency of SS and turbidity were 48.35–99.68% and 24.15–99.36%, respectively, showing the significant removal efficiency of the wastewater process. However, the removal efficiencies of NH3–N, total organic carbon (TOC) and chemical oxygen demand (COD) are limited by wastewater treatment processes. Because NH3–N, TOC and COD of the mixing supernatant and raw water are regulated raw water quality standards, supernatant reuse is feasible and workable during wastewater processes at this plant. Overall, analytical results indicated that supernatant reuse is feasible.  相似文献   

15.
Fate Modelling of DEHP in Roskilde Fjord, Denmark   总被引:1,自引:0,他引:1  
The fate of di(2-ethylhexyl)phthalate (DEHP) is modeled in Roskilde fjord, Denmark. The fjord is situated near Roskilde, which comprises 80,000 PE, various industries, a central wastewater treatment plant, and adjacent agricultural fields. Roskilde fjord is thus a suitable recipient for studying the transport and fate of DEHP, which is used in a variety of different industries and consumer products. Wastewater from households and industries is led to the local wastewater treatment plant, which leads the effluent to the fjord. The sludge is partly stored and partly amended on an adjacent field. The model applied in the present study is a simple box model coupling water and sediment compartments of the fjord with wastewater treatment plant effluent, streams leading to the fjord, and atmospheric deposition. The fjord model comprises first-order degradation, adsorption, sedimentation, vertical diffusion in the sediment, dispersive mixing in the water, and water exchange with the surrounding sea. Experimental measurements of DEHP were made in the fjord water and sediment, in the wastewater treatment plant inlet and effluent, and in streams and atmospheric deposition. The experimental data are used to calibrate the model. The model results show that freshwater from streams is the predominant DEHP source to the fjord, followed by atmospheric deposition and effluents from wastewater treatment plants. Sedimentation is the predominant removal mechanism followed by water exchange with the sea and degradation.  相似文献   

16.
废水COD在线监测系统现场比对试验及管理的几点建议   总被引:7,自引:0,他引:7  
通过分析总结辽宁省废水COD在线监测系统试点工作中在线监测系统的安装、验收、现场实际样品的比对分析,以及试运行过程中存在的问题,就今后废水在线监测系统的运行与管理提出相应的建议.  相似文献   

17.
造纸行业是废水污染物减排重点行业。以2011—2014年全国环境统计调查数据为基础,对不同规模造纸企业废水治理运行费用和绩效进行了分析,对COD、氨氮排放强度及减排潜力进行了对比。结果表明,不同规模企业污染治理与排放特征存在差异,大中型企业产排污强度低,废水治理投入大;若造纸行业企业全部达标排放,COD排放量在2014年水平上减排21.4%~47.2%,氨氮排放量降低27.7%。  相似文献   

18.
焦化废水中的溶解性有机物(DOM)作为废水污染物和毒性的主要来源受到广泛关注。厌氧-缺氧-好氧(A-A-O)生物法联合混凝沉淀工艺在焦化废水处理中被广泛应用。于2018年4,7和11月分别采集4座焦化废水处理厂废水,采用光谱学分析手段和水生生物急性毒性试验对A-A-O联合混凝沉淀处理过程中焦化废水的DOM和毒性变化进行分析。结果表明,焦化废水中含有大量不饱和芳香性物质,其中类色氨酸、络氨酸物质占主导,其次为类溶解性微生物代谢产物、类富里酸物质和类腐殖酸类物质;未经处理的焦化废水对藻类和大型溞的急性毒性等级为中毒至高毒。A-A-O联合混凝沉淀处理可去除90%以上的类色氨酸、络氨酸和类富里酸物质,但对类腐殖酸类物质去除率相对较低,仅为约80%,关键去除段为缺氧段和好氧段;该工艺对焦化废水急性毒性削减率为80.51%~94.30%,关键削减段为厌氧段。Pearson相关性分析结果显示,焦化废水溶解性总有机碳(TOC)、类腐殖酸类物质荧光组分C1和类富里酸类物质荧光组分C4与废水急性毒性存在显著正相关关系,可利用其作为水样急性毒性初筛的指示性指标。可为焦化废水生化处理的效能优化和废水毒性控制及安全评估提供科学支撑。  相似文献   

19.
Research on water quality degradation caused by point and diffuse source pollution plays an important role in protecting the environment sustainably. Implementation of Best Management Practices (BMPs) is a conventional approach for controlling and mitigating pollution from diffuse sources. The objectives of this study were to assess the long-term impact of point and diffuse source pollution on sediment and nutrient load in a lowland catchment using the ecohydrological model Soil and Water Assessment Tool (SWAT) and to evaluate the cost and effectiveness of BMPs for water quality improvement in the entire catchment. The study area, Kielstau catchment, is located in the North German lowlands. The water quality is not only influenced by the predominating agricultural land use in the catchment as cropland and pasture, but also by six municipal wastewater treatment plants. Diffuse entries as well as punctual entries from the wastewater treatment plants are implemented in the model set-up. Results from model simulations indicated that the SWAT model performed satisfactorily in simulating flow, sediment, and nutrient load in a daily time step. Two approaches to structural and nonstructural BMPs have been recommended in relation to cost and effectiveness of BMPs in this study. These BMPs include extensive land use management, grazing management practice, field buffer strip, and nutrient management plan. The results showed that BMPs would reduce fairly the average annual load for nitrate and total nitrogen by 8.6% to 20.5%. However, the implementation of BMPs does not have much impact on reduction in the average annual load of sediment and total phosphorus at the main catchment outlet. The results obtained by implementing those BMPs ranged from 0.8% to 4.9% and from 1.1% to 5.3% for sediment and total phosphorus load reduction, respectively. This study also reveals that reduction only in one type of BMP did not achieve the target value for water quality according to the European Water Framework Directive. The combination of BMPs improved considerably water quality in the Kielstau catchment, achieving a 53.9% and a 46.7% load reduction in nitrate and total nitrogen load, respectively, with annual implementation cost of 93,000 Euro.  相似文献   

20.
Different water quality management alternatives, including conventional wastewater treatment, transportation of wastewater, flow augmentation, low-cost treatment with reuse, and wetlands, are evaluated by using a verified dissolved oxygen (DO) model for the Ravi River. Biokinetic rate coefficients of the Ravi River for both the carbonaceous and nitrogenous oxygen-demanding wastes are adjusted, keeping in view the type and level of wastewater treatment. The conventional activated sludge process with nitrification comes out to be the most expansive alternative to meet the DO standard of 4 mg/L. Additional treatment cost is required to maintain un-ionized ammonia levels <0.02 mg/L, which corresponds to achieving treatment levels of 5 mg/L of DO in the river. Under critical low-flow conditions (i.e., minimum average seven consecutive days) of 9.2 m3/s, a flow augmentation of 10 m3/s can reduce 30 % of the cost with conventional wastewater treatment. Transportation of wastewater from the city of Lahore is a cost-effective alternative with 2.5 times less cost than the conventional process. Waste stabilization ponds (WSP) technology is a low-cost solution with 3.5 times less cost as compared to the conventional process. Further reduction in pollution loads to the Ravi River can be achieved by reusing WSP effluents for irrigation in the near proximity of Lahore along the Ravi River. The study results show that, for highly polluted rivers with such extreme flow variations as in case of the Ravi River, meeting un-ionized ammonia standards can reduce the efforts required to develop carbonaceous biochemical oxygen demand-based waste load allocations.  相似文献   

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