强化厌氧生物处理技术在印染废水深度处理中的应用

发布时间：2018-01-07 05:29

本文关键词：强化厌氧生物处理技术在印染废水深度处理中的应用　出处：《苏州科技学院》2015年硕士论文　论文类型：学位论文

更多相关文章： 印染废水 三级厌氧处理 Fenton氧化

【摘要】：印染废水具有高COD、高色度、可生化性差、成分复杂等特点,是较难处理的工业废水。由于印染废水的排放对环境造成了极大的破坏,严重制约了经济的可持续发展,因此对印染废水的有效处理成为环境领域的重要研究课题。本论文采用三级厌氧柱法处理印染废水,研究柱填料、水力停留时间、容积负荷、上升流速、温度、pH等因素对厌氧柱处理印染废水效果的影响,确定最佳工艺参数。并且在最佳工艺参数下通过研究厌氧柱中添加Ca2+、PAM、活性炭,以改变厌氧污泥载体结构,进一步提高厌氧柱的处理性能,强化印染废水的处理效果。印染废水经三级厌氧柱处理后最终采用Fenton氧化深度处理技术,使出水水质得到进一步提升,经过研究表明:通过比较三种不同填料对COD的去除效果,结果表明:陶粒的效果最好,其次是Al2O3,沸石掺杂钢渣的效果最差;实验确定最佳水力停留时间为16h,此时B/C比达到最大;控制水力停留时间为16h,容积负荷2.127 kgCOD·m-3·d~(-1),三级厌氧柱COD总去除率基本保持74%-78%之间;负荷提升阶段,最初十天VFA浓度变化较大,之后VFA逐渐趋于稳定,表明产甲烷菌生长繁殖较好,没有产生VFA积累使得厌氧柱酸化的现象。强化厌氧柱阶段,厌氧柱2添加Ca2+为280 mg·L~(-1)时COD去除率较高,表明添加Ca2+有利于对COD去除;厌氧柱3选择添加桃壳、煤质或椰壳三种活性炭,结果表明添加煤质活性炭效果最好,最佳投加量为350 mg·L~(-1);采用Fenton氧化深度处理,当H2O2、FeSO4投量为450mg·L~(-1)时,COD从286mg·L~(-1)降低到55mg·L~(-1),色度从150倍降低到85倍;原水经强化厌氧柱1、2、3厌氧处理,再经Fenton法处理,B/C比从0.22提高到0.43。
[Abstract]:Printing and dyeing wastewater has the characteristics of high COD, high chroma, poor biodegradability, complex composition and so on. It is difficult to treat the industrial wastewater. The discharge of printing and dyeing wastewater has caused great damage to the environment. The sustainable development of economy is seriously restricted, so the effective treatment of printing and dyeing wastewater has become an important research topic in the field of environment. In this paper, the three-stage anaerobic column method is used to treat printing and dyeing wastewater, and the column packing is studied. Effects of hydraulic retention time, volumetric loading, rising flow rate, temperature and pH on the treatment of dyeing wastewater by anaerobic column. In order to change the structure of anaerobic sludge carrier and further improve the treatment performance of anaerobic column by adding Ca2 pam and activated carbon to the anaerobic column under the optimum process parameters. The treatment effect of printing and dyeing wastewater was strengthened. After three-stage anaerobic column treatment, the advanced treatment technology of Fenton oxidation was adopted to further improve the effluent quality. The results showed that the removal efficiency of COD was the best for ceramsite, followed by Al _ 2O _ 3, and the effect of zeolite doped steel slag was the worst. The best HRT was 16 h, and the ratio of B / C reached the maximum. The total removal rate of COD in the three-stage anaerobic column was between 74% and 78% when the hydraulic retention time was 16 hours and the volumetric load was 2.127 kgCOD 路m -3 路d ~ (-1). In the load lifting stage, the concentration of VFA changed greatly in the first ten days, then the VFA tended to stabilize gradually, indicating that methanogenic bacteria grow and reproduce well. No accumulation of VFA resulted in acidification of anaerobic column. In the phase of enhanced anaerobic column, the removal rate of COD was higher when the addition of Ca2 to anaerobic column 2 was 280mg 路L ~ (-1). The results show that the addition of Ca2 is beneficial to the removal of COD. Three kinds of activated carbon, peach shell, coal or coconut shell, were added to anaerobic column 3. The results showed that the best effect was added with coal activated carbon, and the optimum dosage was 350 mg 路L ~ (-1). When the dosage of H _ 2O _ 2 and FeSO _ 4 is 450 mg 路L ~ (-1) by Fenton oxidation advanced treatment. The COD decreased from 286 mg 路L ~ (-1) to 55 mg 路L ~ (-1) and the chromaticity decreased from 150 times to 85 times. The raw water was treated with the enhanced anaerobic column (1 / 2) and the ratio of B / P / C was increased from 0.22 to 0.43 by Fenton.
【学位授予单位】：苏州科技学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X791

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