印染废水回用中反渗透技术的实践效果分析

对印染废水进行处理和回用不仅可以减少对环境的影响,而且可以为企业创造更多经济效益。本文以某印染厂为例,说明了印染废水和回用水的水质要求,设计了水处理工艺流程和反渗透系统,并分析了水处理系统效益,反渗透产出的水质达到了印染厂工艺用水的要求,做到了回用印染废水的要求。     

某印染公司废水综合治理及清洁生产改造研究

本文通过查找废水超标排放的原因，针对性提出了某印染公司生产废水综合治理及清洁生产改造技术方案。该方案采用先进的节水措施，节约印染用水，提高水的循环利用率，减少印染废水排放70万t/a，并对现有污水处理设施进行改造，选用先进的A／O工艺，添置部分设备及土建构筑物，提高废水排放标准，减少450t／a COD的排放。     

印染废水处理回用工艺现状研究

印染废水产生量大、有机物含量高、具有一定的毒害性,因此印染废水的回用是降低印染废水污染和印染用水消耗的重要途径,印染废水回用包括原废水和二级生化出水的处理回用。印染废水主要回用于印染生产过程,在以印染原废水处理回用时,典型工艺是生化处理+膜分离组合工艺;在以印染废水处理后的二级生化出水进行处理回用时,其典型工艺分别是超滤+反渗透组合工艺,工艺出水可回用于印染漂洗、染色等生产过程,实现废水厂内循环利用。     

印染废水回用技术

介绍了印染废水的水质特点及回用难点,详细介绍了印染废水深度处理回用技术,如膜分离技术、吸附法、絮凝法、高级氧化技术和生物滤池,并列举了各类技术的研究进展或工程实例.指出选择适当的组合技术能够有效降低印染废水中的各类污染物含量,使之达到某些印染工艺用水的回用要求.     

印染废水反渗透膜处理及回用技术

介绍了印染废水反渗透膜处理回用的原理、运作流程,并对膜处理产水进行了水质分析,评估其用于工厂生产的可行性。实践结果证明,印染废水经反渗透膜处理后含盐量和电导率大大降低,回用水的各项指标均达印染生产用水要求,可满足中高档印染产品的生产需要。     

印染废水处理与回用的工艺设计与应用

采用"混凝沉淀+水解酸化+膜生物反应器(MBR)+反渗透(RO)"工艺相结合对印染废水进行处理与生产回用。介绍了系统的设计和运行情况及主要经济指标,结果表明:出水效果好,工艺运行稳定,排放水可稳定达标排放,回用水水质可满足生产工艺回用水要求。     

棉印染废水处理回用技术研究

为将污水回用于生产,降低生产成本和减少环境污染,对棉印染废水进行清浊分流,将轻质废水作为处理对象采用生化-陶瓷膜过滤工艺对废水进行深度处理后回用,处理后水质满足印染回用水水质要求,其中COD、浊度和色度去除率分别达到85％,98％和95％。将处理后水全部回用于生产,对印染产品质量无影响。     

蜡染企业废水分质处理回用技术与工程实践

蜡染是印染行业中污染最严重、能耗最高的行业,通过采用新的技术手段,对蜡染企业排放的废水进行分质处理并回用是企业实现可持续发展的有效途径。本文介绍了青岛凤凰印染有限公司在生产实践中对退蜡废水进行在线处理回用并回收了松香,对印花后水洗废水进行在线处理回用并回收了热能,从而减轻了终端废水处理设施的压力,实现了终端废水的达标排放及深度处理后的部分回用的工程实践,为国内同行业该类废水的治理提供了借鉴。     

印染废水深度处理及回用探讨

印染废水是工业废水处理领域中的一个热点和难点,而解决印染废水再生、回用的关键是采用合适的深度回收处理工艺。本文对当前印染废水回用的水质标准进行了分析,并在此基础上探讨了印染废水的深度处理及回用工艺。     

丁苯橡胶废水处理与多途径回用试验研究

采用MBR、反渗透和树脂集成工艺对丁苯橡胶废水进行处理与分质回用,并作循环冷却水、一般工艺用水和高品质化学反应用水供给企业使用。通过中试试验对系统不同单元处理效果和运行参数进行现场监测与研究,结果表明:该工艺运行稳定,处理效果较好,出水水质能够实现多用途回用。     

硫化染料回收再利用的试验研究

印染废水具有硫化物含量高、色度深、碱性大、成分复杂等特点,为难处理的工业废水。试验从回收印染废水中的有用物质硫化染料的角度出发,通过混凝沉定法使染料与水分离达到回收再利用的目的。结果表明,浓硫酸的用量为1mL/L,其回收率达到91.3%,回收后的染料染色率达98.2%。回收后的废水经进行一步处理达到国家排放标准。     

An effective technique for wastewater minimisation in batch processes

This paper presents a mathematical formulation for freshwater and wastewater minimisation in multipurpose batch plants. The minimisation of wastewater is achieved through the exploitation of recycle and reuse opportunities. A superstructure that entails all possible recycle and reuse possibilities is used as the basis for the formulation. The existence of an optimal production schedule, which provides starting and finishing times for water using operations, is assumed. The paper addresses the specific case where the contaminant concentration in the outlet water stream from each operation is maintained at its maximum. This condition allows the overall model to be cast as a mixed integer linear programming (MILP) problem for which global optimality is guaranteed. The effectiveness of the developed formulation is demonstrated through a published literature example and a practical case study.     

印染废水处理的工艺选择

纺织印染行业是工业废水排放大户.印染废水含有多种染料、浆料、表面活性剂等助剂,具有水量大、有机污染物浓度高、可生化性较差、色度高且多变、碱性大、水质水量变化大、成分复杂等特点.随着印染工艺和产品结构的改变,印染水质也发生了变化,印染废水的处理难度也随之加大.根据多年处理印染废水实践经验,本文总结提出:"强化生物吸附 厌氧水解酸化 好氧生化处理"工艺是比较经济适用的印染废水处理技术,并以某企业10000 m3/d印染废水处理工程为例对该工艺进行了深入的介绍.     

浅析印染废水处理工艺

如何优化印染废水处理工艺,降低处理成本,提高处理效果,对于印染废水处理有着极其重要的意义。在实际工作中,虽然各企业印染废水水质成分和排水量存在差异,但对于浓度高、可生化性差的印染废水,采用物化与生化的组合再辅以物化的工艺流程,具有良好的去除效果,可以保证达标排放。     

Synthesis of batch water network for a brewery plant

This paper presents an industrial application of mixed-integer nonlinear programming (MINLP) models for the optimisation of a water network, which was initiated by an integral need for cleaner production within a brewery. Several mathematical models were developed in order to reduce the use of freshwater, whilst considering the specific requirements of each particular production section. These models are based on the design method developed by Kim and Smith [1]. The original formulation is modified to enable efficient integration of discontinuous and semi-continuous water-using processes in the packaging area. Semi-continuous processes are treated as water sources of limited capacity. The option of installing storage tanks for semi-continuous water streams is included in the model, in order to re-use these streams during the shutdown periods of semi-continuous operations. The original model is additionally extended with the option of installing local (on-site) wastewater treatment units operating either in batch or semi-continuous modes. This enables the analysing of opportunities for regeneration re-use within the production area, i.e. the brewhouse with a cellar, because of high contaminant concentrations at these sites. The scheduling of batch wastewater treatment units is performed simultaneously in order to adjust the treatment schedule to a fixed schedule of batch processes.     

纺织工业产排污特征与水污染治理技术进展

纺织工业在我国国民经济中发挥着重要的作用,但其水污染防治问题也一直是环境治理的重点与难点.随着生态文明建设理念的提升,纺织工业将面临愈加严格的排放标准和环境管理要求.为更清晰地了解纺织工业水污染治理技术的现状和发展趋势,首先对纺织生产过程进行梳理,分析及总结了行业中纺织和染整两个主要加工过程的产排污特点;其次,分别对物化、生物以及深度处理技术进行分析与汇总,提出了基于废水分质处理和再生回用的可行技术体系;最后,结合我国环境管理制度的发展,根据未来纺织工业技术的发展趋势对行业水污染治理的发展方向进行展望.研究显示:完善末端处理技术、提高废水回用率、推行清洁生产是我国未来纺织废水治理的发展方向;同时也亟需推进工业聚集区的设立,确立以排污许可为核心的管理制度,加强对纺织企业废水污染排放的监督.      

Optimal retrofit of water conservation networks

This paper presents a new general mathematical programming model for the optimal retrofit of material conservation networks considering recycle, reuse and regeneration schemes (notice that most of the previously reported methods only have considered the synthesis case, and nowadays it is very important to have strategies for the retrofit of water networks because several existing water network are functioned under suboptimal conditions because these were synthesized using inefficient approaches or because the process and environmental constraints have changed). The model considers the reconfiguration of existing networks to satisfy stricter process and environmental constraints considering the repiping for the network, the reuse of the existing treatment units, the modification for the capacity and performance of the existing units and the installation of new treatment units to reduce the overall operating cost through the reduction of the use of fresh sources. The objective function accounts for the minimization of the total annual cost associated to the retrofit process. This retrofit process involves simultaneously economic (because the reduction of the fresh sources costs) and environmental (because the reduction of the waste streams discharged to the environment and with a better quality) improvements. The applicability of the proposed model is proved through a set of example problems addressed, where no numerical complications were observed. In addition, the proposed approach is general and it can be applied to any specific case with the information required.