混凝—热固化联合空气吹脱法处理高浓度水性油墨废水

采用混凝—热固化联合空气吹脱法处理高浓度水性油墨废水。混凝—热固化法处理高浓度水性油墨废水的优化工艺条件为混凝剂NS-1投加量7.36 g/L,热固化温度75 ℃,热固化时间30 min,在此条件下COD去除率达91.00%,色度去除率达99.00%。空气吹脱法处理混凝—热固化出水,初始ρ（氨氮）对氨氮去除率影响较小;气液比增大、废水pH升高、吹脱次数增加、废水温度升高均能提高氨氮去除率。在废水初始ρ（氨氮）为1 406.25 mg/L、气液比为2 667、废水pH为11.50、废水温度为25 ℃、连续吹脱4次的条件下,氨氮去除率达95.34%。     

硫酸盐木浆厂蒸发冷凝水的厌氧处理试验研究

硫酸盐木浆厂排出的蒸发冷凝水具有高温、高浓度、营养物质含量低等特点,并含有一定浓度的挥发性恶臭硫化合物.本研究采用空气吹脱-UASB流程处理此类废水.结果表明,70%～80%的挥发性有机硫化物能够在气提过程中被去除.除硫后的蒸发冷凝水在UASB反应器中能够得到有效处理,当COD容积负荷达到30 kg·(m³.d)^-1时,COD去除率仍能保持在95%左右.另一方面,试验开始时接种的颗粒污泥在反应器中破碎并逐渐被新形成的颗粒污泥代替,扫描电镜观察显示,新形成的颗粒污泥具有与接种污泥不同的微生物相.     

吹脱法去除垃圾渗滤液中的氨氮研究

对吹脱法去除垃圾渗滤液中的氨氮进行了研究 ,控制吹脱效率高低的关键因素是温度、气液比和 pH值。在水温大于 2 5℃ ,气液比控制在 35 0 0左右 ,渗滤液 pH值控制在 1 0 5左右 ,对于氨氮浓度高达 2 0 0 0～ 4 0 0 0mg/L的垃圾渗滤液 ,去除率可达到 90 %以上     

线性扫描溶出伏安法同时测定水样中铅镉铜锌

通过多壁碳纳米管-Nafion复合膜修饰电极,建立水样中痕量铅、镉、铜、锌同时测定的线性扫描溶出伏安分析法,优化支持电解质及pH值、修饰剂用量、富集电位及时间等测定条件。实验结果表明,在pH 4.0的NaAc-HAc缓冲液中,-1.20V富集5min后,在电位-1.04V、-0.72V、-0.45V及-0.16V附近分别产生锌、镉、铅、铜的灵敏溶出峰,测定各元素的线性关系良好,相对标准偏差均小于5.4%。该法已成功应用于实际水样中痕量铅、镉、铜、锌的同时测定,加标回收率在93.3%~106.7%之间,结果满意。     

阳极溶出伏安法测定水体中痕量Sb^5＋

在ｐＨ３．４，８－羟基喹啉、甲基橙的浓度分别为４３μｍｏｇ／Ｌ、１３μｍｏｌ／Ｌ的０．１ｍｏｌ／Ｌ（ＮＨ４）２ＳＯ４底液中，用阳极溶出伏安法直接测定水体中Ｓｂ＾５＋。其线性范围为０．２６～５．２ｎｍｏｌ／Ｌ，方法的检出限为０．１ｎｍｏｌ／Ｌ；９次重复测定的变异系数为０．８％；回收率为９５．６％～１０４％。大部分常见阳离子不干扰测定。     

Electrochemical analysis of endosulfan using a C18-modified carbon-paste electrode

Successful applications of different analytical procedures to determine quantitatively endosulfan and its metabolites in aqueous media can be found in recent literature. Fundamentally, they have made use of solid-phase extraction (SPE) and gas (GC) or liquid chromatography (LC), sometimes coupled to mass spectrometry (MS). In this paper, a new and alternative methodology to determine quantitatively endosulfan in aqueous media is reported. A C18-modified carbon-paste electrode has been used to determine voltammetrically endosulfan, despite its unfavourable electrochemical properties and behaviour. The methodology proposed is based on the decrease experienced by the peak intensity corresponding to voltammetric signals of Cu(II) when successive and constant additions of endosulfan are carried out. This decrease is directly proportional to the concentration of endosulfan what allows to perform an indirect quantification of the pesticide. The detection limit obtained is 40 ng l⁻¹, this value being under the limits specified by European norms and EPA reports.     

联碱废水资源化治理工艺的研究

提出预处理→二级蒸馏→吹脱治理联碱废水的新工艺 ,不仅使废水中的氨氮达到排放标准 ,而且能回收氨氮 ,具有一定的经济效益和社会效益。     

Study on the effect of landfill leachate on nutrient removal from municipal wastewater

In this study, landfill leachate with and without pre-treatment was co-treated with municipal wastewater at different mixing ratios. The leachate pre-treatment was achieved by air stripping to removal ammonia. The objective of this study was to investigate the effect of landfill leachate on nutrient removal of the wastewater treatment process. It was demonstrated that when landfill leachate was co-treated with municipal wastewater, the high ammonia concentration in the leachate did not have a negative impact on the nitrification. The system was able to adapt to the environment and was able to improve nitrification capacity. The readily biodegradable portion of chemical oxygen demand (COD) in the leachate was utilized by the system to improve phosphorus and nitrate removal. However, this portion was small and majority of the COD ended up in the effluent thereby decreased the quality of the effluent. The study showed that the 2.5% mixing ratio of leachate with wastewater improved the overall biological nutrient removal process of the system without compromising the COD removal efficiency.     

三维电极法深度处理环保发电厂垃圾渗滤液的实验研究

采用氨吹脱--三维电极法对广东某环保发电厂经混凝--生化处理后的垃圾渗滤液进行深度处理,实验结果表明:在渗滤液pH为11,温度60℃,吹脱时间50min时脱氨率达95%;脱氨后的渗滤液经三维电极电解处理,COD去除率达81%,颜色清澈,可达《生活垃圾渗滤液排放限值》(GB16889-1997)的二级排放标准。     

臭氧/紫外光法处理炼油厂汽提污水的静态实验

用O3／UV法对炼油厂汽提污水中高浓度的COD、Oil、Ar-OH、S^2-进行降解研究,通过控制O3浓度、反应时间,可使各污染物降解达到较高的去除率。近一年的实验表明,与单独用O3法相比,UV使COD、Oil、Ar-OH的降解率,平均分别提高了16％、18％、26％。同时用GX-94测爆仪对反应过程中的尾气进行检测分析,表明O3／UV使废水中各污染物的降解过程是,S^2-类污染物最先被O3／UV氧化降解,其次是含C类有机物的氧化降解,降解的终产物是CO、小分子CH类物质等。本方法也使原废水的可生化性得到显著提高。