甘肃定西某药厂废水处理厂升级改造工程设计

甘肃定西某药厂废水处理厂原采用生物曝气池对厂区废水进行处理,为满足水量水质变化要求,并保证出水符合《中药类制药工业污染物排放标准》(GB 21906-2008),在充分利用原有处理设施的基础上对废水处理厂进行了升级改造,设计了两级厌氧+生物接触氧化工艺。介绍了改造工程的工艺设计、升级改造情况及主要构筑物的设计参数。     

某食品有限公司废水处理工程改造

某食品有限公司废水处理站原有处理设备陈旧老化,为减轻排放废水对环境的污染,在原有设备和构筑物的基础上,对处理工艺进行了改造,完善预处理、厌氧、好氧系统并加强深度处理,使出水达到《肉类加工工业水污染物排放标准》(GB 13457-92)一级排放标准.     

混凝气浮-好氧MBR工艺处理大型超市废水工程实例

超市废水主要包括餐饮废水、洗车废水、生鲜废水和生活污水.采用混凝气浮-好氧MBR工艺对某大型超市废水处理工程进行改造.改造工程实际运行结果表明,该工艺运行稳定、操作管理方便,出水水质好,完全可以达到《污水综合排放标准》(GB 8978-1996)一级标准的要求.     

某精细化工废水处理系统问题诊断及工程改造实例

广东中山某精细化工企业生产废水主要含有油脂基表面活性剂，废水处理工程项目原设计采用调节-电芬顿(电解-铁碳-双氧水)-MBR(AO)工艺，污水站建成时间长，由于预处理工艺设计缺陷及芬顿系统效率低，产泥量大等原因，高级氧化单元未能获得对高浓度污染物及毒害性物质的有效去除及破坏，废水中污染物进入后续生化系统后未能获得良好的降解效果，导致出水水质出现异常波动，COD和氨氮不能稳定达标。改造工程增加酸析及混凝气浮工艺，降低高级氧化段负荷；将原芬顿高级氧化系统优化改造为紫外光电芬顿系统，提高反应速率，降低污泥产量；同时对生化池曝气系统及工艺运行模式进行调整。运行结果表明，改造后污水处理系统效果稳定，出水水质稳定达到《广东省地方标准水污染物排放限值》(DB 44/26—2001)一级排放标准。     

上海市竹园第一污水处理厂升级改造工程

上海市竹园第一污水处理厂升级改造工程处理规模170万m3/d,设计出水执行《城镇污水处理厂污染物排放标准》(GB18918—2002)二级排放标准,近期按普通活性污泥工艺运行,远期采用A/O生物脱氮工艺。对比分析了升级改造工程与原一期工程的污水处理工艺及污染物去除效果,介绍了原有构筑物的利用改造情况和新建构筑物的设计参数,以及升级改造工程的社会环境效益等。     

草甘膦废水预处理研究与工程应用

某草甘膦废水处理站已无法达到处理要求,需要进行改造.为了减轻后续的生化处理负荷,强化对草甘膦废水的除磷预处理,选用电絮凝氧化、Fenton氧化和电磁-Fenton氧化3种工艺作为草甘膦废水预处理工艺,进行了比选试验.试验结果表明,Fenton氧化为本工程的草甘膦废水最佳预处理工艺,可达到预期效果.     

焦化废水强化预处理改造及运行效果分析

西北某焦化厂原废水采用隔油-气浮-A/O生化-混凝沉淀-陶粒过滤常规处理工艺,外排废水达不到《炼焦化学工业污染物排放标准》(GB 16171-2012)中的间接排放标准。工程改造将属于焦化化工工艺剩余氨水预处理部分纳入了焦化废水处理流程,采用前置隔油、气浮、陶瓷过滤及蒸氨预处理工艺与以O-A-O为核心的生化污水处理相结合的新工艺,提高了预处理除油效果,减轻了蒸氨塔填料污堵率,提升了蒸氨塔蒸氨效果。后续新增预曝气池提高了污染物去除能力和系统耐冲击负荷能力。此外,将已有陶粒过滤改造为活性炭过滤,确保最终出水水质达到国家排放标准。     

成都市高新西区污水处理工程设计与运行管理

成都高新西区污水处理工程采用目前污水处理领域广泛应用的CASS工艺,出水达到《城镇污水处理厂污染物排放标准》(GB 18918-2002)一级B标准.介绍了该污水处理工程工艺流程、主要处理构筑物和设备、工程调试以及运行参数的确定,总结了该工艺的设计特点,分析了三年来的运行效果以及运行管理中应注意的问题,供污水处理设计、运行人员参考.     

MBR处理不同污水的应用及存在的问题

膜生物反应器(MBR)是一种新型高效的污水处理工艺,出水可以作为中水回用,其在生活污水、工业废水及厕所废水、垃圾渗滤液、医院污水等特殊行业均已有研究和应用.介绍了MBR在不同领域的应用情况和工程实例,总结了在实际应用中存在的膜造价较高、能耗较高和膜污染等问题.     

A/O2工艺处理焦化废水

邢台钢铁厂对蒸氨预处理工艺进行改造后,采用气浮-A/O2-混凝沉淀工艺处理焦化废水.工程实践表明,该工艺运行稳定、操作维护简单,出水各项指标均能达到《钢铁工业污染物排放标准》(GB 13456-92)二级排放标准.同时也可大幅减少运行费用.     

人工湿地技术在给水工程中的应用

通过分析人工湿地技术的原理和布置,阐述其处理特点和池型布置方面的区别,并详细介绍人工湿地技术在水源生态湿地和污泥处理质能转化这两种给水工程中的应用,突出该技术在今后给水工程中广阔的应用前景.污泥处理质能转化技术在净水厂设计中可用于厂区生产排水直接处理或浓缩后排泥水处理,也可用于浓缩池上清液以及脱水机滤液达标排放处理.     

A new side stream process for easily degradable industrial waste waters to avoid sludge bulking.

A new treatment scheme for the treatment of easily biodegradable industrial waste waters has been developed. The side stream treatment of dairy waste water with the excess sludge from the domestic treatment line of the regional treatment plant Bad V?slau has been operated successfully for a period of three years during which the industrial load stemming from the dairy increased from 800 kg COD/d to 2,500 kg COD/d with peak loads up to 5,000 kg/d. Despite of the increased load to the treatment plant the total aeration tank volume had not been increased. This treatment is performed in an existing aeration tank of the WWTP (V = 1,800 m3) which is now used as contact tank for the combined aeration of dairy waste water and excess sludge from the domestic treatment line (volume aeration tank = 15,000 m3). In this tank the easily degradable substrate from the industrial waste is mainly adsorbed to the biological sludge and after a mechanical dewatering transferred to the anaerobic digester where it yields in an increased gas production. The filtrate of the dewatering process is completely free from biodegradable material and can without danger of bulking be fed to the aeration tank of the domestic treatment line. The new process has proven to be extremely flexible since already now daily peak loads exceeding the design load by more then 60% could be treated in the plant without any problems. Compared to other alternatives for the dairy waste water treatment that were investigated during this study, the new side stream process is very advantageous. No other pre-treatment process for industrial waste water could have been operated under comparable loading conditions without severe operating problems.     

长距离输水隧洞施工期生产污水处理问题研究

目前,解决隧洞施工期污废水的有效处理,减少对施工场区周边环境、尤其是水环境的破坏及污染,是一个具有普遍性的问题。结合工程实例,对隧洞施工期污废水处理的控制指标进行分析,选取合适的污水处理方法,采用合适的污水处理工艺与设备,解决了长距离输水隧洞的施工期生产污水处理问题。     

Sewage reuse for aquaculture after treatment in oxidation and duckweed pond.

The benefits of treating sewage by pond systems offer, through a simple and low-cost technology, social and commercial benefits, from the waste raw materials. The objective of this work was to demonstrate an effective treatment of the sewage by using natural treatment systems, and use of treated wastewater for aquaculture. The study was conducted for the sewage generated from the IIT Kharagpur campus. After characterization of the sewage, laboratory scale experiments were conducted for treatment using oxidation pond and duckweed pond. Survival and growth of fishes were observed in the experimental ponds using treated sewage. Based on the experimental results, full-scale treatment plant was designed to meet the aquaculture water quality. From the economics of the proposed full-scale plant, and utilization of the treated sewage for aquaculture, it is estimated that, the amount of Rs. 20,0000 can be generated every year. This amount recovered from the aquaculture will be more than the operating cost of the treatment plant, hence, making the operation of sewage treatment plant self sufficient. Use of a UASB reactor as the first stage treatment before sewage passes to the oxidation pond, can be a more attractive alternative because of less land requirement as compared to the oxidation pond alone, and additional land can be made available for aquaculture to increase revenue.     

基于完全混合和S—P模式的地表水环境影响预测与评价

探讨地表水环境影响预测与评价的方法。以拟建污水处理厂对地表水环境的影响预测为例,在对区域地表水环境质量现状评价的基础上,选取COD、氨氮作为影响预测因子,通过完全混合模式和一维稳态s—P衰减模式预测处理后废水排放对地表水环境的影响。结果表明：拟建的污水处理厂排放的污水对当地地表水环境的影响不大,项目建设是可行的,可为今后同类建设项目对地表水环境的影响预测与评价提供参考和借鉴。     

蘑菇湖水库水环境现状及保护对策

对蘑菇湖水库主要污染源和水库水质现状进行调查评价,分析表明蘑菇湖水库污染严重,已失去养殖功能。为减少水库纳污量,控制水体进一步受到污染,提出治理措施和建议:石河子造纸厂是水库的主要点污染源,应修建氧化塘,废水处理后,达标排放;石河子市尽快建立污水处理场,对排污管网的污水进行处理,达到污水一级排放标准后,合理调度,减少水库纳污量。     

人工湿地污水处理系统优化设计模型

针对污水处理厂进水水质和水量的不确定性,考虑进水水量、TSS、BOD5、TN、TP的区间变化,以出水时TSS、BOD5、TN、TP的质量浓度标准为约束条件,单元面积为决策目标,以费用最小为目标函数,建立基于一级动力学污染物去除模型的人工湿地污水处理系统区间数优化设计模型。该模型包含初沉池、人工湿地床(表面流和潜流式)两个单元,考虑了设计中的不确定性因素。实例计算表明,模型适用性较好。     

污水处理系统的集成控制策略研究

以实现河流水质目标为前提,充分利用河流纳污能力,根据不同环境与气候条件调节污水处理厂运行状况和排水管网的污水排放量,可有效保护河流生态质量。基于城市污水处理系统集成仿真平台,提出了4种以河流水质为目标的城市污水处理系统集成控制方案,通过对排水管网和污水处理厂的协调控制,实现了河流水质的改善。仿真结果验证了集成控制策略的有效性。     

Strategy for olive mill wastewater treatment and reuse with a sewage plant in an arid region.

This study was conducted to evaluate the treatability of OMW (olive mill wastewater) with sewage and sewage sludge, which could supplement nutrients and microbes required for OMW treatment and reduce its possible toxicity. The amount of OMW added to an aeration tank was based on the loading difference between the designed and actual COD loads, while the amount added to anaerobic digestion for energy recovery was determined by CH4 production. The COD removal efficiencies were 70-85% for both systems. Compost of OMW with dried sewage sludge also showed a similar temperature profile without OMW addition. This strongly suggested that OMW can be treated at a sewage plant without pretreatment and the treated effluent can be reused in irrigation for an arid region.     

Upgrading of Florence wastewater treatment plant: co-digestion and nitrogen autotrophic removal.

In recent years a completely autotrophic nitrogen removal process based on Anammox biomass has been tested in a few European countries in order to treat anaerobic supernatant and to increase the COD/N ratio in municipal wastewater. This work reports experimental results on a possible technical solution to upgrade the S. Colombano treatment plant which treats wastewater from the Florentine urban area. The idea is to use 50% of the volume of the anaerobic digester in order to treat external sewage sludge (as septic tank sludge) together with waste activated sludge and to treat the resulting effluent on a SHARON-ANAMMOX process in order to remove nitrogen from the anaerobic supernatant. Anaerobic co-digestion, tested in a 200 L pilot plant, enables low cost treatment of septic tank sludge and increases biogas production; however, it also increases the nitrogen load re-circulated to the WWTP, where nitrogen removal efficiency is already low (<50%), due to the low COD/N ratio, which limits predenitrification efficiency. Experimental results from a SHARON process tested in a lab-scale pilot plant show that nitrite oxidising bacteria are washed-out and steady nitrite production can be achieved at retention times in the range 1 - 1.5 days, at 35 degrees C. In a lab-scale SBR reactor, coupled with a nitration bioreactor, maximum specific nitrogen removal rate under nitrite-limiting conditions (with doubling time equal to about 26 days at 35 degrees C) was equal to 0.22 kgN/kgSSV/d, about 44 times the rate measured in inoculum Anammox sludge. Finally, a cost analysis of the proposed upgrade is reported.