CASS法处理含盐废水的研究

采用鱼品加工厂生产废水掺一定比例的海水作为试验用水,通过含盐量的不断增加研究系统的耐盐性,通过含盐量的降低和升高研究系统的抗盐度波动性。试验表明,当Cl-的质量浓度<6300mg/L时,CASS系统可正常运行;当Cl-的质量浓度<4500mg/L时,对于Cl-质量浓度梯度为3600mg/L的冲击,系统可以在1个运行周期内恢复正常运行。     

印染废水治理技术综述

综述了印染废水治理技术研究现状,介绍了各方法的特点及其在印染废水处理中的应用,为印染废水处理方法的选择提供了有价值的依据。     

城市污水处理厂污泥协同处置模式讨论

随着污水处理量的快速增长,常规的污泥处置模式已经很难满足环境标准和经济发展要求,污泥协同处理处置模式应该在污泥稳定化和无害化的基础上,充分实现污泥的资源化,这样不仅能安全合理的处置污泥,减少占地面积,而且能充分有效利用资源,实现经济与环境的协调发展。     

粉煤灰和二次污泥联合处理生活污水的实验研究

使用大同地区粉煤灰及污水处理厂的二次污泥,采用"物理生物联合法",通过实验,对生活污水化学需氧量的降解过程进行了优化处理。研究了粉煤灰和污泥在不同实验条件下,对污水中化学需氧量的去除效果。研究结果表明:150 mL的生活污水,经粉煤灰6 g、污泥8 g、静置时间15 min的处理过程,其COD去除率可达到62%。     

Effect of Precipitant Additives on the Sludge Settling and Compacting Performance for Heavy Metal Wastewater Treatment

The purpose of this study is to investigate the impact of precipitant additives, i.e., calcium hydroxide (Ca(OH)₂), calcium carbonate (CaCO₃) and recycled sludge (RS), on the settling and compacting performance of sludge formed in the process of heavy metal wastewater treatment using bio-polymer ferric sulfate (BPFS). The results show that CaCO₃ is the most suitable additive since heavy metal removal, sludge settling performance, and compacting performance is improved by 20%, 83.3%, 23.5%, respectively. In addition, scanning electron microscopy and X-ray diffraction were measured for contrasting the sludge morphology and crystallinity. The results suggest that CaCO₃ acted as seeding material produces the largest flocs. Moreover, the flocculation theory combined with zeta potential measurement was used to explain the sludge formation mechanism, which is proposed as charge neutralization by BPFS, sweep flocculation by amorphous precipitate, and bridging flocculation by polyacrylamide (PAM) in sequence. The improvement of sludge properties by adding CaCO₃ benefits from the enhancement of sweep flocculation. In summary, the interaction mechanism between precipitant additives and sludge performance is well understood, thus providing useful information about adding precipitant additives to improve both the sludge settling properties and the quality of the treated water during the heavy metal wastewater treatment.     

颗粒污泥处理高负荷有机含油废水的形成过程及特性探究

在序批式反应器(SBR)内接种絮状物质,以实际高负荷含油废水为探究对象,在中温条件下考察了进水有机负荷(OLR)对颗粒污泥形成的影响,分析了OLR对颗粒污泥粒径、生物量、微生物活性、胞外聚合物(EPS)组成的演化规律,探究了OLR影响颗粒污泥对化学需氧量(COD)与溶解性油类的去除特性.结果表明,当进水OLR由0.5 ...     

广东省东西北地区污水处理厂污泥处理处置技术探讨

文章简单综述了国内污泥处理处置方法及存在的主要问题,对广东省东西北地区污水处理厂建成运营后产生的污泥情况做了简单介绍,并针对其特点提出了设立地区污泥集中处理处置中心,对污泥进行＂厌氧消化＋高压隔膜压滤脱水＋土地利用、建材利用或混合填埋＂处理处置的方案。     

城市污泥处理与处置技术的现状研究

随我国的污水处理产业得到了快速发展,污水处理能力及处理率增长迅速,带来了污泥产量的迅速增加。城市污泥的处理处置问题已经威胁到人类的生存环境,成为不可忽视环境问题。文章在主要介绍我国目前对城市污泥处理与处置的常用方法和国内外新的研究进展。     

印染废水处理的探讨

本文主要介绍了印染废水的特点,较全面地总结了目前流行的处理印染废水和减少印染废水污染所采取的主要措施。