厌氧复合生物反应器处理印染废水的应用研究
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摘要
印染废水具有水温高、污染物浓度高、色度大、水质水量波动等特点,本研究在总结实验室研究成果的基础上,设计厌氧复合生物反应器,并结合生产企业的特点,进行厌氧复合反应器的应用型试验研究。
     厌氧复合生物反应器的开发应用已成为废水处理技术领域的重要研究课题,厌氧反应器的处理效能、运行特性及其反应器的结构等决定着其在实际工程中的应用前景。厌氧复合生物反应器为污泥床与过滤床有机结合的强化厌氧生物处理设施,本论文重点进行了厌氧复合生物反应器的启动试验及中、高COD浓度印染废水的厌氧处理试验。研究表明:该反应器不仅具有优良的有机物去除能力,而且由于其良好的结构条件,可根据不同的进水浓度,合理调节污染物负荷,实现系统的稳定运行。由于采用污泥床与过滤床的有效结合,使厌氧反应器维持较高的生物量,具有启动快、颗粒污泥形成时间短、耐冲击负荷能力强等特点,为整个印染废水处理工艺的稳定、高效运行创造了十分有利的条件。
     应用研究表明:厌氧复合生物反应器应用于处理印染废水在进水温度处理常温20~30℃条件中低浓度印染废水的COD_(Cr)去除率为38~69%,色度去除率为67~75%;处理高浓度印染废水水温常温20~30℃时,COD_(Cr)去除率为34.1—73.6%;色度去除率为60—80.5%。当水温提高至35~45℃时,COD_(Cr)的去除率开始下降,适当降低负荷可恢复厌氧反应器的正常运行。
     在保证出水达标的基础上,通过优化江阴康源印染有限公司两套印染废水处理系统,可实现年经济效益100万元。可见,厌氧复合生物反应器在印染废水处理中具有良好的应用前景。
Dyeing and printing wastewater has characteristic of high temperature, high concentration of pollution, many kinds of colour and changes of quantity and water quality. With conclusion of experimental study, Upflow blanket filter biological reactor was designed, and industrial test of had been done for dyeing and printing wastewater treatment.
    Application and study of anaerobic reactors is now being one of the important topics in industrial wastewater treatment field. The key profiles affecting the practical application of anaerobic reactors are pollutants removal capacity, operational performance and configurations as well, which are affected in industrial application. Upflow blanket filter biological reactor is combined with sludge bed and filter bed. This study concentrated on the star, industrial test for high and ordinary concentration dyeing and printing wastewater treatment of upflow blanket filter biological reactor. The result of test indicated that the reactor has capacity of COD removal and colour, reasonable construction, safe and convenient operation in different concentration of pollutants as condition quantity. Upflow blanket filter biological reactor has specific property of quickly stared, short time in form particulate sludge and bearing dash load as high concentration of microorganism.
    The result of industrial test showed that COD removal rate is 38-69% in low or ordinary concentrate, colour removal rate is 67~75% in low or ordinary concentrate of pollutants between 20 to 30癈; COD removal rate is 34.1-73.6% in low or ordinary concentrate, colour removal rate is 67-75% in high concentrate of pollutants between 20 to 30癈. When the temperature goes up to 35-45 癈, the removal rate of COD and colour are low.
    For Jiangyin Kangyuan Dyeing and Printing co. Ltd, under the condition of meeting discharge standard, it can save one million yuan per year after adopting new upflow blanket filter biological reactor and optimizing the operation of two sets of wastewater treatment.
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