共查询到19条相似文献,搜索用时 109 毫秒
1.
生物接触氧化工艺处理制革废水 总被引:3,自引:0,他引:3
介绍用生物接触氧化工艺处理制革废水的技术特点、工艺流程和应用实践,制革废水经该工艺处理后,出水水质达到《污水综合排放标准》(GB8978-1996)二级标准。运行结果表明,该工艺处理效果稳定,耐冲击负荷强.工艺组合合理,在制革废水处理中具有实用性。 相似文献
2.
3.
制革属重污染行业,在原皮生产加工过程中会产生大量的废水、固废和废气等污染物。制革废水是制革企业污染防治的重点,我国早在2006年已提出污水分流分治处理的要求,但推行效果并不理想。该文在对现阶段我国主要制革废水治理措施进行分析的基础上,分析制革企业采取废水污染防治措施有效性和存在的不足,对如何真正实现污水分流分治和生产全过程污染控制提出建议,探讨制革企业污染防治措施发展方向。 相似文献
4.
介绍了采用气浮—氧化沟—人工湿地工艺处理制革生产废水的工程实例。工程运行结果表明,COD去除率≥97.5%,NH3-N去除率≥90%,出水达到了《污水综合排放标准》(GB8978-1996)中的一级排放标准。该工艺操作简单,运行成本低,运行稳定可靠。 相似文献
5.
6.
制革工业用水量大,废水耗氧量高、杂质多、色深、味臭,是较难处理的废水之一.目前,国内外治理制革污水一般采取分隔治理和综合治理两种方法.分隔治理即对制革不同工序的污水采取不同的单项治理方法,如对脱脂污水采取化学絮凝法、分离法、浮选法和酸提取法来提取油脂;对脱毛废水中的硫化物的治理则通常采取沉淀法、酸回收法、氧化法;对废铬液的治理目前常采用直接循环使用、碱沉淀后回收再用;综合治理是指制革不同工序的 相似文献
7.
通过治理工程实践,应用混凝气浮和活性污泥好氧生化法治理制革污水,管理方便,处理费用低,处理的出水水质稳定,处理效率较高、可以取得较好的环境效益。 相似文献
8.
制革废水生化需氧量高,悬浮物多,色度较高且有臭味,并含有硫化物、铬、植物鞣剂及酚类合成鞣剂等有害物质,是一种较难治理的污水.MBR废水在制革废水中的应用,有效的解决了制革废水出水水质不稳定、回用较难的问题,是未来制革废水处理与回用发展的方向. 相似文献
9.
10.
论述了皮革园区皮革废水的性质,根据制革行业污水的特点提出并论述了污水采用“五水分流分治、企业厂内治理与集控区综合治理相结合的治污模式”的处理要求及其达标保证措施. 相似文献
11.
12.
Lawrence K. Wang Douglas B. Dahm Robert E. Baier Robert C. Ziegler 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1975,25(6):475-490
A promising technique emphasised in the proposed tannery waste treatment system is surface adsorption. Specific surface adsorption processes studied were foam separation without additives, adsorbing colloid flotation, carbon adsorption, and adsorption flotation. Results show that foam separation without additives is not a feasible process for the removal of either dissolved organics or suspended solids from tannery wastes. Adsorbing colloid flotation is feasible for the primary treatment of tannery wastes, provided that dimethyldihydro-genated-tallow ammonium chloride or the like is used as a collector. Secondary treatment of tannery effluent by carbon adsorption alone is not sufficient. However, by combining carbon adsorption and flotation into a single process (adsorption flotation) a high fractional removal of both dissolved and suspended pollutants can be achieved. 相似文献
13.
14.
Aafreen Fathima Jonnalagadda Raghava Rao Balachandran Unni Nair 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2012,87(2):271-279
BACKGROUND: Bacterial strains belonging to the genus Bacillus, isolated from Cr‐ polluted soil (tannery sludge) were employed as consortium for Cr(III) removal from tannery effluents. Kaolin clay, a natural adsorbent, was used as supporting material for bacterial biofilm formation. The use of clay‐supported bacterial biofilm has not previously been employed for the treatment of tannery effluents containing Cr(III) salt. RESULTS: Commercial tannery effluent containing 1000 ppm initial metal ion concentration was treated in stages. The initial Cr(III) concentration of 1000 ppm was brought down to 2 ppm, a permissible level for discharge, after the fourth stage. The bacterial isolates were found to be Bacillus subtilis VITSCCr01 and Bacillus cereus VITSCCr02 by 16s rRNA gene sequencing. Batch assay and confocal laser scanning microscopy results revealed the role of kaolin as a support material in biofilm formation. Best fit was obtained with the Freundlich adsorption isotherm. The mechanism of sorption was confirmed by Fourier transform infrared (FT‐IR) spectroscopy and scanning electron microscopy–energy dispersive X‐ray spectroscopy (SEM‐EDS). CONCLUSION: Cr(III) removal from tannery effluent using low cost adsorbents such as kaolin and bacteria proved to be effective for metal concentrations ?1000 ppm; this is normally not possible using conventional treatment methods. This work has demonstrated feasible sorption of Cr(III), especially during post‐tanning operations. Copyright © 2011 Society of Chemical Industry 相似文献
15.
16.
17.
聚合硫酸铁处理制革废水 总被引:12,自引:0,他引:12
本文研究了几种常用的国产混凝剂处理制革废水的效果,得出聚合硫酸铁是一种比较经济有效的混凝剂,配合PAM助凝剂可以取得更好的效果。工艺上采用混凝气浮,可全部去除硫化物,出水总铬≤1mg/L,COD去除率可达70%-80%。 相似文献
18.
在原有废水处理设施的基础上,对原有水处理工艺进行了改造,强化了预处理过程,采用UASB+CASS工艺处理乳酸生产废水,在进水COD为3 256 mg/L、BOD5为1 320 mg/L、SS和NH3-N的质量浓度分别为635、31 mg/L时,出水水质稳定,COD为98mg/L、BOD5为26mg/L、SS和NH3-N的质量浓度分别为75和22mg/L,达到GB8978-1996表4中规定的二级要求,去除率分别可达到97.0%、98.0%、88.2%和29.05%。该项工程可为类似高含量有机废水的处理提供参考。 相似文献
19.
The kinetics of coagulation process for turbidity removal from tannery industry effluent using NaCl solution extracted Moringa oleifera protein is reported here. The effect of initial pH of effluent on floc size and strength was analysed. Floc size decrease with increase in velocity gradient and hierarchy of floc size exponent at different pH was: acidic > neutral > basic. It was observed based on the half-life period data that the process follows a second-order kinetic model with 0.000862 (L/mg min) as the rate constant. The Talmadge–Fitch method is used to analyse batch sedimentation data for the calculation of area for the clarifier-thickener unit to treat 5 m3/h of tannery wastewater. 相似文献