城市污水回用于电厂循环冷却用水的试验研究

根据阜新市城市污水厂具体的实际情况,结合火力发电厂循环冷却水的水质要求,拟定了微絮凝及纤维球过滤处理工艺,并经过模拟试验验证的方法,证明其工艺的合理性和实用性,有助于城市污水处理后回用于发电厂循环冷却水的工程实际.     

石家庄某橡胶制品有限公司生产废水处理

介绍了用物化法(气浮 过滤)处理橡胶制品废水的工程实例，并对该工艺进行了简单的说明。经过本工艺处理的橡胶制品废水可以直接回用。     

餐饮废水治理方法的研究

对餐饮废水进行了实验研究。综合国内外对餐饮废水处理的工艺及原理。研究了一种经济实用的处理方法。结果表明 ,采用复合新型混凝剂 ,将废水经过混凝沉淀、砂滤及活性炭吸附深度处理后 ,达到国家正常排放标准 ,经过消毒处理后的水可用于生活杂用水。     

粉煤灰处理印染废水

叙述了将印染废水用于锅炉烟气的水膜除尘 ,并将该废水通过粉煤灰过滤 ,净化 ,达标排放的新途径     

水生腐殖酸分子量分布研究——Ⅰ.串联凝胶色谱法测定水生腐殖酸分子量分布

考察了测定水生腐殖酸分子量分布及其平均分子量的串联凝胶色谱法。结果表明,使用Sepbadex G-25和G-100两种凝胶的色谱柱系统的分离范围可从分子量1000左右到数万,几乎包括了水生腐殖酸分子量分布的整个区段。这样的串联凝胶色谱柱的标定曲线为一折线,可用分段函数近似地加以描述。     

膜生物反应器中污染物去除途径及膜过滤性能

采用一体式悬浮生长型和附着生长型膜生物反应器(MBR)处理微污染水源水,主要考察了两种MBR对污染物的去除途径和膜过滤性能。结果表明,两种MBR对主要污染物高锰酸盐指数和NH4+-N均有良好的去处效果,去除率分别达到66%和94%以上。悬浮生长型MBR的去除效果稍强于附着MBR,因为前者的生物量要高于后者。两种MBR的生物去除和膜去除对去除效果都有重要贡献,而膜去除是获得良好的出水水质的保证。曝气量对两种MBR的污染物去除效果没有明显影响,一定范围内增大曝气量会提高生物去除的比例。悬浮生长型MBR的膜污染速率要比附着生长型快得多,但运行稳定后,两者的膜比通量大致相当。     

污泥脱水中PAC与PAM联合使用的试验研究

利用正交试验作单因素分析,对PAC与PAM的投加量、投加方式等因素对污泥脱水效果的影响进行了研究。结果表明:PAC,PAM用量分别为240mg·L-1,60mg·L-1,配制溶液的百分比例分别为4%,0.1%时,投加方式为先加PAC,搅拌后再加PAM,污泥脱水效果较好,形成的泥饼含固率达到22%,且药剂费比单独使用PAM经济。     

猪舍污水的处理技术

随着“菜篮子”工程的实施,上海市郊集约化饲养场蓬勃发展,但大量粪尿污水亦带来了严重的环境问题,本文就活性污泥法与土壤处理法对猪舍污水的氮、磷去除技术作了较详细的介绍.这些处理技术的特点是设备简单、操作方便、投资省,而处理效果较好,具有实用价值.     

某钢铁厂处理废水工程设计

为了实现工业废水零排放，同时为满足进口轧机所需要的高质量循环水和锅炉用水需要，某钢铁厂采用曝气-混凝沉淀-超滤＋反渗透组合工艺处理回用生产过程中的废水。该工程一期规模15000m^3／d，全部扩建完成后将达到30000m^3／d，是集曝气、混凝沉淀、超滤、反渗透等各种工艺于钢铁厂回用水处理的环保型工业水处理工程。出水水质可满足回用需要，工程造价低，工艺先进，设备简单，因此适合钢铁企业废水的治理。     

Contaminant transport in dual-porosity media with dissolved organic matter and bacteria present as mobile colloids

In riverbank filtration, contaminant transport is affected by colloidal particles such as dissolved organic matter (DOM) and bacterial particles. In addition, the subsurface heterogeneity influences the behavior of contaminant transport in riverbank filtration. A mathematical model is developed to describe the contaminant transport in dual-porosity media in the presence of DOM and bacteria as mobile colloids. In the model development, a porous medium is divided into the mobile and immobile regions to consider the presence of ineffective micropores in physically heterogeneous riverbanks. We assume that the contaminant transport in the mobile region is controlled by the advection and dispersion while the contaminant transport in the immobile region occurs due to the molecular diffusion. The contaminant transfer between the mobile and immobile regions takes place by diffusive mass transfer. The mobile region is conceptualized as a four-phase system: two mobile colloidal phases, an aqueous phase, and a solid matrix. The complete set of governing equations is solved numerically with a fully implicit finite difference method. The model results show that in riverbank filtration, the contaminant can migrate further than expected due to the presence of DOM and bacteria. In addition, the contaminant mobility increases further in the presence of the immobile region in aquifers. A sensitivity analysis shows that in dual-porosity media, earlier breakthrough of the contaminant takes place as the volumetric fraction of the mobile region decreases. It is also demonstrated that as the contaminant mass transfer rate coefficient between the mobile and immobile regions increases, the contaminant concentration gradient between the two regions reverses at earlier pore volumes. The contaminant mass transfer coefficient between the mobile and immobile regions mainly controls the tailing effect of the contaminant breakthrough. The contaminant breakthrough curves are sensitive to changes in contaminant adsorption and desorption rate coefficients on DOM and bacteria. In situations where the contaminant is released in the presence of DOM and bacteria in dual-porosity media, the early breakthrough and tailing occur due to the colloidal facilitation and presence of immobile regions.