高浓度焦化废水处理工艺的研究

对焦化废水的微生物处理工艺进行改进,采取提高污泥浓度,增加曝气量,增加凝聚工艺等强化处理措施,提高了对高浓度焦化废水的处理效率,使废水达到国家排放标准。     

污泥加药调质中的有关问题探讨

污泥的加药调质条件对脱水性能的影响很大，在加药调质中，根据污泥性质，正确选择凝聚剂和絮凝的种类、规格和投加量是很关键的。在具体的调质工艺过程中，还有一些值得注意的环节。污泥脱水效果不佳，并不一定是脱水机的性能、污泥性或调质药剂等原因所至，有可能是在具体的调质工艺操作中的一些易忽视的环节出了问题，而这些对污泥调质效果往往是至关重要的。     

利用工业废液制凝聚剂处理漂染废水

<正> 1 前言柳州市针织运动衣厂主要生产粗呢布、腈纶绒线、棉毛布和腈纶布等产品,该厂排放的有色废水中主要含酸性染料、直接染料、阳离子染料以及阳离子表面活性剂1227等污染物。废水直接排入柳江上游,对江水产生了较严重污染,并且给市民生活用水和身体健康带来不良影响,同时也影响了该厂的声誉。1987年3月,我们对该厂漂染废水进行了小型试验研究,采用化学凝聚沉淀一级处理工艺取得成功,并于1987年7月进行了施     

A cleaner two-step synthesis of high purity diallyldimethylammonium chloride monomers for flocculant preparation

In order to improve the flocculation efficiency of polydiallyldimethylammonium chloride（PDADMAC）, high molecular weight PDADMAC should be prepared from high purity diallyldimethylammonium chloride（DADMAC） monomers. In this paper, a cleaner method with microwave irradiation and alkali solidification was proposed for preparing high pure DADMAC by selective heating under low temperature, and the prepared high purity DADMAC is characterized using FTIR and atomic absorption spectrometry. The new method provides a solution to the key technical problem of PDADMAC synthesis. Comparing with the conventional methods, the results showed that the advantages of the novel synthesis include： （a） high purity DADMAC is improved from 57% to 71% ; （b） reaction time of tertiary amine preparation is shortened from 6 h to 7 min; （c） water instead of acetone was used as reaction medium; （d） toxic by-products, wastewater and waste gas are eliminated. Flocculant made from the synthesized high purity DADMAC monomers was proved more efficient in flocculation tests.     

Flocculation performance of a novel synthesized flocculant with low ecological risk

Combined flocculants with low ecological risk are urgently required in water supply and wastewater treatment in China. A novel flocculant was thus developed under the condition of low ecological risk( noted as CAS).The experiments to examine wastewater treatment performance of the new product showed that there was favourable performance in the flocculation process in contrast to commercial flocculants in treating kaolin suspensions, municipal effluent and domestic wastewater. Flocculation performance included the turbidity removal rate, sediment character and a decrease in COD(chemical oxygen demand). The sediment time of flocculation is short and the removal rate of turbidity treated by CAS is high compared with PAC(polyaluminum-chloride), PAM (polyacrylamide) and the combined addition of PAC and PAM. The optimal concentration required to affect flocculation processes is dependent on kaolin concentration and the character of the wastewater within the range examined. It also showed that CAS is effective to treat wastewater with high turbidity.     

回流法测定废水中氯化物的改进及排除B_r~-、I~-等多种干扰作用的研究

本文在常规Ｖｏｌｈｏｒｄ回滴法测定氯化物中,加入一定量聚（Ｉ）〔１〕防凝聚剂,可以防止经典法不可避免的复分解反应,保证测定结果的准确性;同时研究了通过控制不同酸度、温度及加入不同类型试剂等简便化学手段除去十多种常见干扰物质的方法,尤其能有效除去现有各方法中最为棘手、难度较大的同族元素Ｂ－ｒ、Ｉ－等干扰,方法简便、快速、效果显著,在工业废水的测定中优于其它方法。     

Production and application of a novel bioflocculant by multiple-microorganism consortia using brewery wastewater as carbon source

The flocculating activity of a novel bioflocculant MMF1 produced by multiple-microorganism consortia MM1 was investigated. MM1 was composed of strain BAFRT4 identified as Staphylococcus sp. and strain CYGS1 identified as Pseudomonas sp. The flocculating activity of MMF1 isolated from the screening medium was 82.9%, which is remarkably higher than that of the bioflocculant produced by either of the strains under the same condition. Brewery wastewater was also used as the carbon source for MM1, and the cost-effective production medium for MM1 mainly comprised 1.0 L brewery water （chemical oxygen demand （COD） 5000 mg/L）, 0.5 g/L urea, 0.5 g/L yeast extract, and 0.2 g/L （NH4）2SO4. The optimal conditions for the production of MMF1 was inoculum size 2%, initial pH 6.0, cultivating temperature 30℃, and shaking speed 160 r/min, under which the flocculating activity of the MMF1 reached 96.8%. Fifteen grams of purified bioflocculant could be recovered from 1.0 L of fermentation broth. MMF1 was identified as a macromolecular substance containing both protein and polysaccharide. It showed good flocculating performance in treating indigotin printing and dyeing wastewater, and the maximal removal efficiencies of COD and chroma were 79.2% and 86.5%, respectively.     

石南4井区采出水处理化学调控方法研究

随着新疆油田石南4井区逐步开发及其它区块采出液的汇入,石南4采出水水质已发生明显变化,水型已由硫酸钠型变为碳酸氢钠型,硬度、碱度明显上升。文章分析了石南4采出水水质腐蚀结垢原因,筛选出了适宜的水质净化及调理药剂。结果表明:在净化稳定剂加药量为200 mg/L,净化凝聚剂加药量为6mg/L,调理剂加药量为100~200mg/L时,采出水处理效果较好,有效降低了腐蚀结垢强度,满足Q/SYXJ0065—2003《克拉玛依油田注水水质标准》要求,采用此药剂体系处理采出水,成本为1.25元/m~3。     

一种水幕帘式漆雾凝聚剂的制备及应用

以三聚氰胺为主要原料制备消粘剂A,阳离子聚丙烯酰胺为主要原料制备凝集剂B,对过喷油漆废水进行凝聚处理,确定了该漆雾凝聚剂的最佳配方和制备工艺条件,探讨了漆雾凝聚剂的作用机理.结果表明,消粘剂A制备的适宜反应条件为:原料比n(三聚氛胺):n(甲醛)=1:2,羟甲基化反应(pH=8-9,30min)、酸性缩聚反应(pH=3,3 h)温度均在70℃下进行.凝集剂B由0.12％的改性剂改性阳离子聚丙烯酰胺制得;当A与B的投加量体积比为1:2时其凝聚效果最佳,此时水中的漆雾去除率达到97.5％,且其成本低廉,具有明显的经济效益与环境效益.