Reclamation of wastewater effluent from a chemical fiber plant

An electrochemical method in conjunction with chemical coagulation and ion-exchange treatments is employed to treat the wastewater effluent from a large chemical fiber plant. The effectiveness of the combined methods in treating the wastewater effluent was assessed in terms of water quality for reuse in the manufacturing process. Experiments were conducted to examine the effects of various operating variables of the electro-chemical method, chemical coagulation and ion exchange on the water quality and the optimum operating ranges of those variables were identified. The quality of wastewater effluent after the combined treatments was found to be excellent, better than the reuse standards for the chemical fiber industry.     

Water Reuse Fit for Purpose by a Sustainable Industrial Wastewater Management Concept

Water shortage is often a challenge for industrial park developments. To ensure a more sustainable water supply, the Industrial Wastewater Management Concept with a focus on Reuse (IW²MC→R) provides a strategy to meet the challenges. Main requirements to achieve water reuse fit for purpose are optimized wastewater treatment, an optimized sewer and pipe system, and an innovative water quality monitoring concept. To evaluate water‐reuse concepts, a reuse factor is calculated, which relates to all wastewater inflows to the central wastewater treatment plant and all reuse‐water flows.     

核电厂水处理的工艺比选和系统设计探讨

在进行核电厂污水处理工艺设计时,应分析核电厂污水水质和水量的特点。文章就核电厂的污水处理工艺比选、系统设计和中水回用方案进行讨论,从而确定合适的工艺流程和中水回用方案。提高污水处理站的出水水质,对中水进行综合利用,减少对附近的自然水体造成的不利影响,可以实现良好的经济效益和社会效益,为后续电站的工艺设计提供借鉴和参考。     

石油化工污水深度处理与回用的研究进展

石油化工企业污水经过物理预处理,生化二级处理后仍含有难降解的微溶有机污染物、悬浮物、油等杂质,必须经过深度处理才能达到回用水质标准,实现污水回用,解决石化厂用水量大、水资源短缺的问题。简要介绍国内外石化污水回用现状,重点介绍了国内外石化污水深度处理的常用方法,分析了这些方法在石化污水深度处理中的优缺点,以及需要改进的方面,并展望了一些新型处理技术在石化污水深度处理中的应用前景。     

小型火电厂废水零排放工艺研究

在对小型火电厂各用水系统水质特征进行调查分析的基础上，提出改进各用水系统的运行状况提高水的重复利用率，减少废水排放，通过废水回用和最终处置，实现火电厂废水零排放。     

印染废水深度处理与回用技术研究进展

综述了印染废水深度处理及回用技术的研究现状,指出了深度处理技术存在的主要问题,提出了从清洁生产与分质回用角度考虑,采用组合集成工艺技术体系是印染废水深度处理回用技术今后研究的主要方向。     

焦化废水深度处理工业应用研究

由于焦化废水成分复杂、难以降解,经生化处理后使用常规处理方法其出水很难达到回用标准,采用砂滤-超滤-纳滤组合工艺对焦化废水生化出水进行深度处理,出水CODCr的平均质量浓度为37.77 mg/L,NH3-N的平均质量浓度为2.71 mg/L,色度、SS去除效果明显,达到GB 50335-2002《污水再生利用工程设计规范》中循环冷却水系统补充水水质控制指标的要求.     

炼油厂污水回用于循环冷却水系统的工业试验研究

为了保证污水回用后循环冷却水水质可控,防止换热设备的腐蚀、结垢趋势加剧,选择合理的污水回用工艺技术,重新筛选水稳剂配方.工业放大试验表明,外排污水适度处理回用能够达到节水减排和循环冷却水场水质达标的目的.     

Water reuse of south Barcelona's wastewater reclamation plant

The use of water from the wastewater reclamation plant serving the south of Barcelona, Spain, will contribute with new resources to help to solve the water scarcity problem that the Barcelona metropolitan area suffers at present. When the plant starts to operate, it is scheduled to reuse 50 Mm³/y of reclaimed water that will be used for supplying the ecological flow in the lower part of the Llobregat River, irrigation of farm areas and supplying water to wetlands in the river deltaic areas. Another scheduled use pretends to solve the salt-intrusion problem in the Llobregat lower delta aquifer through the implementation of an hydraulic barrier using reclaimed water. For obtaining water with the quality required for all the reuse purposes, it is necessary to modify the existing biological treatment to remove nutrients (nitrogen and phosphorus) and the construction of a tertiary reclamation facility, which for recharge purposes includes a reverse osmosis plant. A pumping station and pipelines for transporting the reclaimed water to the different application areas and a different pipeline for transporting the water to the injection wells where it is introduced into the aquifer at a depth of 60 m are being built.     

UASB-CASS-BAF工艺用于屠宰废水的中水回用

为了满足屠宰废水处理后的中水回用要求,实现屠宰废水的零排放,本工程采用UASB-CASS-BAF工艺对该废水进行治理。运行结果表明,该工艺处理效率高,出水水质稳定而且明显优于《肉类加工工业水污染排放标准》(GB 13457—1992),符合中水回用要求。     

Nanofiltration and reverse osmosis of model process waters fromthe dairy industry to produce water for reuse

In dairy plants the process waters generated during the starting, equilibrating, interrupting and rinsing steps contribute to the production of effluents. They correspond to milk products (milk, whey, cream) diluted with water without chemicals. The treatment of these dairy process waters by nanofiltration (NF) or reverse osmosis (RO) operations was proposed to concentrate dairy matter and to produce purified water for reuse in the dairy plant. The study reports one-stage and two-stage (NF + RO and RO + RO) spiral-wound membrane treatments with five model process waters representative of the main composition variations observed in dairies. Performances (permeate flux, milk components rejection, purified water characteristics) of the different operations were compared. Discussion was focused on the comparison between quality of produced waters and vapour condensates (from product drying and evaporation processes) reused in dairy plants. Accordingly, both total organic carbon (TOC) and conductivity of water treated by a single RO or NF + RO operations were convenient for reuse as heating, cooling, cleaning and boiler feed water. With the two-stage RO + RO process, a more purified water complying with the TOC drinking water limit was achieved.     

自来水厂生产废水回用工艺研究进展

本文概述了自来水厂生产废水水质特征,对比了直接回用、处理后回用两种废水处理方式的优缺点。膜分离回用工艺出水浊度低、可有效控制消毒前体物质及致病微生物,同时回收率高、运行费用低,是一种安全有效的生产废水回用方式。     

内蒙地区城市污水回用作电厂循环冷却水的可行性研究

污水回用是缓解我国水资源紧缺的有效途径之一。本文通过对城市污水回用作电厂循环冷却水时的水质、水量、处理技术及其经济、环境效益的分析,说明了内蒙地区城市污水回用于电厂的可行性。     

组合工艺处理回用洗浴废水的试验研究

利用混凝沉淀—曝气生物滤池-膜生物反应器-ClO2消毒组合工艺对洗浴废水处理进行了试验研究。结果表明,该工艺出水能够完全达到城市污水再生利用的水质标准,且具有占地面积小、操作简单、出水水质稳定等优点,是行之有效的处理方法,同时对此工艺进行了经济效益分析。     

火车站机务段中水回用工程研究与应用

采用BIRFOR＋CIO2消毒工艺对经过生化处理后的废水进行进一步处理后用于清洗火车,处理后废水各项指标可以达到《铁路回用水水质标准》（TB／T3007—2000）第二类水质要求。该中水回用工艺,运行费用0．83元/m^3（计设备折旧）,5．75年可回收投资,既减少了废水对环境的污染,又可以较少清洁水的用量,节约水费。同时实现环境价值和经济价值。     

A/O+BAF组合工艺在炼油废水处理中的应用

随着原油劣质化趋势的不断加剧,炼油废水水质日趋复杂,传统的活性污泥法、生物膜法以及A/O法等单一的生化处理工艺已不能满足国家污水排放标准的要求。利用A/O工艺除碳脱氮效能显著和BAF工艺处理微污染水性能突出的优点,中油庆阳石化新厂炼油废水处理采用A/O+BAF组合工艺以应对这一趋势,实现炼油废水处理连续稳定达标,确保回用水处理装置长周期平稳运行。     

制革废水处理回用方案探讨

通过对制革废水几种常用处理工艺的分析,针对不同处理方法中存在的问题,提出可行的改进方案。此方案可以减少制革废水处理的投资成本,提高废水处理后的出水水质,使制革废水经过处理后的出水可以达到回用。     

纳滤工艺对铅锌冶炼工业废水的回用处理

针对铅锌冶炼废水外排水含盐量高、结垢倾向严重并含有重金属的水质特点,采用纳滤工艺对其进行回用处理,纳滤进水压力为0.6～0.75 MPa,系统回收率为75%,脱盐率为92%～95%,产水水质优于循环水水质标准可直接回用于厂区工业用水系统.浓水采用强化混凝工艺处理可迭标外排.介绍了纳滤工艺及其预处理工艺,浓水处理工艺,并对其运行情况及存在问题进行了总结分析.     

污水处理厂循环式硝化脱氮法设计与运行管理

污水再利用日益受到重视,需对污水处理厂实施改造,以达到高效除磷脱氮的目的,并提高出水水质。污水处理工艺循环式硝化脱氮法的设计程序中,需对SRT和A-SRT、MLSS浓度和循环比以及二沉池负荷等运行指标进行设定。在运行管理过程中,需对缺氧池的氧化还原电位以及好氧池的溶解氧浓度等数据进行把控。通过改造标准活性污泥法的设施、在曝气池中增设隔墙、设置DO计和ORP计的信息反馈系统等,使之成为污水脱氮的高级处理设施,满足处理水回收再利用的水质要求。     

城市污水再生与景观河道利用工艺方案探讨

通过对相关案例和水质标准的分析,阐述深度处理和生态净化对污水景观河道回用的重要意义;提出改善回灌河道水质和确保生态安全的城市污水“三级处理＋生态净化＋河道修复”工艺;以宁波市南区污水处理厂污水再生回用工程工艺设计为例,从河道水体现状、再生水水质水量、投资与效益及配套保障措施等方面,探讨采用该工艺进行城市污水尾水再生和景观河道回灌,实现生态环境利用的技术经济可行性.