共查询到20条相似文献,搜索用时 453 毫秒
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糠醛又称呋喃甲醛,无色液体,溶于乙醇等有机溶剂,经氧化生成2-呋喃甲醛,经还原生成呋喃甲醛,糠醛由农副产品中所含聚戊糖裂解后脱水而得,糠醛是制备多种药物和工业产品的原料,由糠醛制得的呋喃经由所还原还可制成丁二醛. 相似文献
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利用废铁屑处理含铬废水试验研究 总被引:7,自引:0,他引:7
通过研究在酸性条件下利用废铁屑处理剧毒的六价铬电镀废水的工艺条件 ,在最佳条件下废水中六价铬去除率达99 %以上 ,出水总铬含量为0.040mg/l,六价铬含量为0.002mg/l,大大低于国家排放标准0.500mg/l。 相似文献
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在中国玻璃工业中,普遍存在玻璃制造废水未经处理直接排放的现象。虽然这些废水水质相对化工行业来讲污染较轻,但是由于其排放量大,且排放的废水中含有油类、SS、氟及重金属等的污染物,这些污染物对自然环境和人类的危害是严重的,所以玻璃厂废水在排放前必须经过处理。在这篇文章中,分析了某平板玻璃工厂针对原有废水处理工艺效率低的问题,研究了处理系统的改造更新技术,在增加气浮装置的新系统中,通过一个月的调试和运行,其结果证明增加气浮池能深度处理含油物质,同时可以在一定程度上降低含氟物质带来的污染,处理后出水可达《污水综合排放标准》(GB8978-1996)的二级排放标准,并能用于循环系统,降低用水量,提高企业的经济效益。 相似文献
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炼油化工废水处理的传统处理工艺中存在一定的弊端。为此,玉门炼油化工总厂对其废水处理设施进行了改建和扩建,其生物处理系统采用了序批式活性污泥法处理工艺。经过 3年运行的结果表明:该系统运行效果良好,处理后的水质可达到《GB8978-1996》(石化)一级排放标准的要求;化学需氧量(COD)和生化需氧量(BOD)分别降低78.6%和91.2%,硫化物去除率为98.2%,挥发酚去除率为99.6%。而且该反应器具有较强的耐冲击负荷能力,进水中COD在600 mg/L以下且有大幅度波动时,该系统仍可稳定地运行,处理后的水可达标排放。 相似文献
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Summary This study is carried out to propose an appropriate treatment technology for wastewater discharged from a flavor production
factory. Industrial wastewater discharged from this factory ranges between 50–70 m3/d with an average value of 60 m3/d. The major source of pollution in this factory is due to cleaning of the vessels therefore the treatment has been carried
out on the end-of pipe wastewater. The wastewater is characterized by high values of COD, BOD, TSS and Oil and grease 4646,
2298, 1790 and 626 mg/l respectively. Primary sedimentation of the wastewater for four hours reduced the COD, BOD, TSS and
Oil and grease by 43, 47, 80 and 74%, respectively. For the treatment of the produced wastewater, the biological treatment
process such as activated sludge, rotating biological contactor (RBC), up-flow anaerobic sludge bed reactor (UASB) have been
selected. The results from each treatment process proved to be efficient for the treatment of such wastewater. The treated
wastewater characteristics are in compliance with the Egyptian law which regulates the discharge of industrial wastewater
to the sewerage system. The RBC was selected and installed by the factory as it has the advantage of low operating and maintenance
costs. The factory RBC performance was monitored; characteristics of the treated effluent in terms of oil and grease, COD,
BOD and TSS were 27, 362, 139 and 95 mg/l, respectively. 相似文献
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COREX是一种炼铁新工艺,COREX3000已经在宝钢正式投产。COREX在生产过程中产生的大量废水需要排至厂区废水管网,但其水质无法满足厂区生产废水管网的纳管标准。本文就COREX废水处理的具体内容和方法进行了初步的分析和探讨,可作为相似工程中设计的借鉴和参考。 相似文献
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为脱除焦化废水中的酚,本文研究了新型化学破乳法液膜脱酚的工艺,确定了搅拌塔操作条件,并实际应用于焦化厂含酚废水的处理中,结果表明该工艺具有良好的脱酚效果。 相似文献
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Photocatalytic degradation of organic wastes by electrochemically assisted TiO2 photocatalytic system 总被引:4,自引:0,他引:4
Photocatalytic degradation of organic wastes with nanosized titanium dioxide particles has been studied for a long time in order to offer an appropriate method for wastewater treatment, but its practical application is greatly limited by the slow process. In this work, an electrochemically assisted TiO2 photocatalytic system was set-up by combining a TiO2 photocatalytic cell with a three-electrode potentiostatic unit. The composite system revealed high photocatalytic activity towards organic wastes mineralization. After continuous treatment for 0.5 h, the maximum absorption of rhodamine 6G (R-6G) was reduced by more than 90%; chemical oxygen demand (COD) and biochemical oxygen demand (BOD5) of textile dye wastewater (TDW) were decreased by 93.9 and 88.7%, respectively. The biodegradability of TDW was also improved because the COD/BOD5 ratio decreased from 2.1 to 1.2. All these results indicated that the composite system could be used for effective organic wastes mineralization or as a feasible detoxification and color removal pretreatment stage for biological post treatment. 相似文献
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污泥高固体厌氧消化研究进展 总被引:1,自引:0,他引:1
厌氧消化是实现污泥的减量化、稳定化和资源化的重要手段,相对于传统的低浓度污泥厌氧消化工艺高固体污泥厌氧消化可以直接利用污水处理厂排放的脱水污泥,具有设施体积小、单位容积产气率较高和水耗及能耗较低等优势。本文综述了近年来污泥高固体消化的研究进展,从污泥高固体厌氧消化的基本特征出发,总结了污泥高固体厌氧消化的影响因素和对反应器的要求;同时对污泥高固体消化存在的搅拌不匀、传质传热困难、有机质降解率偏低、搅拌系统不成熟等问题作了简要分析,这些问题都还有待于深入研究解决。 相似文献