表面活性剂改性岩矿材料去除废水中氯代烃的实验研究

利用天然沸石、膨润土、碱性流纹岩及英安岩等岩矿材料及其表面活性剂HDTMA Br改性产物对废水中有机氯化物的去除进行了实验研究 .结果表明 ,表面活性剂改性作用有利于增强岩矿材料对水中有机氯化物的去除作用 ,其中 ,改性膨润土去除效果最好 ,二氯甲烷、三氯甲烷、四氯化碳、三氯乙烯、四氯乙烯和氯苯的去除量分别达到 9.1,18.9,4 3.0 ,2 0 .0 ,32 .4和 30 .3μg·g-1.有机物在沉积物中的有机碳 -水分配系数Koc与岩矿材料对有机氯化物的去除量之间有较好的相关关系 .     

利用粉煤灰处理含铜废水的实验研究

研究了粉煤灰去除废水中铜离子的速率、粉煤灰投加量对粉煤灰去除废水中铜离子的影响和粉煤灰对质量浓度不同的含铜离子废水的去除效果,进一步探讨了粉煤灰去除铜离子的机理,实验结果显示粉煤灰在去除废水中铜离子的过程中反应3 h后就达到了平衡,粉煤灰对Cu2 的去除率随粉煤灰投加量的增加而增加,但是就充分利用吸附剂粉煤灰的角度而言,并非其投加量越多去除量越大,粉煤灰吸附废水中的铜离子更符合Langmuir模型,而不是Freundlich模型;粉煤灰去除废水中的Cu2 主要是静电吸附、阳离子交换吸附和表面络合吸附作用,但是,当用碱性粉煤灰处理质量浓度较低的含Cu2 废水时,生成Cu(OH)2的沉淀作用可能占主要的地位.     

Operational Cost Comparison of Several Pre‐Treatment Techniques for OMW Treatment

Olive mill wastewaters (OMWs), which are known to have deep impacts on the receiving water bodies due to their high‐strength contents of organic materials and color, must be treated before discharge. For this reason; a number of research studies have been available in current literature related to the treatment of OMWs. However, no widely accepted treatment alternatives have been proposed yet. The common results of these studies suggest that OMWs must be pretreated prior to final purification processes. This study focuses on the comparison of alternative pre‐treatment processes in the aspect of chemical oxygen demand (COD) removal and costs of operation. Centrifuging, lime precipitation, acid cracking, and electrocoagulation processes were performed to compare removal efficiencies and operational costs. The COD removal efficiencies for centrifuging, lime precipitation, acid cracking, and electrocoagulation processes were determined to be 30.1, 24.1, 20.0, 53.7%, respectively, with operational costs being $0.30, $0.37, $1.42, and $11.60 per cubic meter of wastewater treated, respectively. The centrifuging process was concluded to be the most appropriate one according to the COD removal efficiency and cost of operation.     

Recovery of astaxanthin from discharged wastewater during the production of chitin

In this paper, studies were carried out to extract astaxanthin from discharged wastewater during the production of chitin and to reveal the scavenging effect of the obtained pigment on 1, 1-diphenyl-2-picrylhydrazyl (DPPH) radical. Different ratios of dichloromethane/methanol (V/V) were used to extract astaxanthin. When the ratio of dichloromethane/methanol was 2:8 and the ratio between the mixed organic solvent (dichloromethane/methanol, 2:8, V/V) and wastewater was 1:1, the highest yield of pigment was obtained (8.4 mg/ 50 mL). The concentration of free astaxanthin in the obtained pigment analyzed by HPLC was 30.02%. The obtained pigment possessed strong scavenging ability on DPPH radical and IC50 was 0.84mg/ml.     

微生物在人工湿地污水处理中的研究进展

人工湿地是一种新型污水处理技术,微生物作为人工湿地的主要分解者,在人工湿地去除水中污染物的过程中发挥着重要作用,因其高效污水净化能力目前已得到广泛关注。本文从人工湿地中的微生物多样性、微生物污水净化机理、研究方法及根际微生物的研究等方面介绍了微生物在人工湿地污水处理中的研究进展。指出根际微生物在人工湿地中的的分布和作用特点,以及开展研究的重要意义。     

黄土-微生物系统处理含油废水的静态模拟试验研究

通过室内静态模拟实验,对黄土-微生物系统去除含油废水中石油类污染物的效果进行研究,分析了营养物质、温度、氧化剂及pH值等影响因素,并通过正交试验确定了系统的最佳生态条件。结果表明:黄土-微生物系统处理含油废水的最佳生态条件为:营养物质(C∶N∶P)为500∶6∶1,温度为35℃,H2O2的累积投加量为12mg/L,pH值为7。     

再生水用于盐湖滩田生产的可行性研究

运城盐湖滩田生产工艺特殊,一年之中,春季淡水溶解盐类矿床,经过夏季蒸发提浓、配兑,冬季母液分离得到产品。盐湖地处运城盆地,春季干旱少雨,淡水资源不足,严重制约滩田生产。城市污水进行深度处理达二级排放标准的再生水,是解决水资源短缺的有效途径。从政策、技术、经济等方面进行分析,再生水可作为滩田生产用水,既保证了充足的水源供应,又大幅度降低了生产成本,可收到良好的社会效益和经济效益。