【作者】 倪世清；

【导师】 鲁秀国； 李占臣；

【作者基本信息】 河北大学 ， 无机化学， 2005， 硕士

【摘要】 印染废水是在织物的染色、印花过程及前后处理所产生的废水。此类废水具有排放量大、水质复杂、CODCr和色度大、可生化性差等特点,加之水质波动大,处理难度较大,使研究的实用性、经济性均不理想。本实验对可生化性差的高浓度难降解毛毯印染废水的生化处理工艺着重进行了研究,提出了两种生化处理工艺:水解酸化—生物接触氧化、UASB 消化—SBR 好氧氧化,并采用NaClO 氧化—粉煤灰吸附的方法对生化段出水进行了后续处理,使最终出水水质达到了国家一级排放标准。本课题来源于高浓度难降解印染废水处理的实际工程,针对性强,因此对该印染废水的工程改造和类似高浓度难降解印染废水的处理具有较高的参考及应用价值。实验过程中主要对CODCr、色度、BOD5、SS、等指标进行监测控制和分析研究。系统进水CODCr在2317mg/L~3496 mg/L 之间,平均为2843mg/L,色度在360 倍~550倍之间,平均值达到445 倍,pH 值在6~8 左右。在水解酸化—生物接触氧化工艺中,废水经过水解酸化处理, BOD5/CODcr由0.19上升到0.44,表明水解酸化对提高废水的可生化性有明显的作用,能为后续的好氧接触氧化处理创造有利条件。再经过经生物接触氧化处理后,出水CODCr、色度去除率分别达到83.4%和50.5%;在稳定运行状态下,系统相应的最大CODCr负荷为4.59 Kg CODCr /(m3.d),最小水力停留时间为15h。在进水水质波动较大和进水量增加的情况下,系统出水水质稳定,表明系统抗冲击负荷能力较强,有较好的稳定性。在UASB 消化—SBR 好氧氧化工艺中,首先利用UASB 反应器对废水进行厌氧消化处理,通过实验数据,确定本处理单元水力停留时间为18h, 反应温度为30℃。在提高其可生化性的同时,此时CODCr 和色度的去除率分别为61.8%和70.5%;室温下,MLSS:3500mg/L,曝气量:1.0m3/L,停留时间8h 为SBR 反应器最佳处理条件,其COD 和色度去除率分别为76.7%和66.7%,工艺COD 和色度总去除率分别达到91.1%和90.2%。生化段出水经过后续的氧化和吸附处理,完全达到了国家一级排放标准,研究结果表明,本实验数据可作为工程的设计及更为深入研究的重要参考依据。更多还原

【Abstract】 Printing and dyeing wastewater is the mixture for fabric dyeing, printing and triming wastewater. This kind of wastewater shares the characters of large quantity discharge, high CODCr and chromaticity color, low bio-degradability, which makes its treatment very difficult. This experiment research shows that it is technical feasible for the treatment of printing and dyeing wastewater with the process of hydrolysis and acidification -biological contact oxidation –chemical oxidation –adsorption. During the stable operation state, the original wastewater’s average CODCr gets to 2843mg/L, yet the out below 100 mg/L , and at the same time, the standards of chromaticity color and SS respectively fits our desirable goal. The corresponding maximum CODCr lord is 4.59 KgCOD/(m3.d),and the minimum HRT is 15 h. Hydrolysis and acidification process is employed to improve the wastewater’s bio-degradability. Experiment data shows that Hydrolysis and acidification process could improve the BOD5/ CODCr from 0.19 to 0.44, which created a benefit condition for the following aerobic oxidation treatment. In the experiment on the anaerobic—aerobic treatment of printing and dyeing wastewater with the equipment of UASB and SBR, the perfect controlling conditions are studied. The data of UASB anerobic treatment shows that when the temperature is 30℃, HRT 18 h, the removal rate of CODCr and chromaticity color respectively gets to 61.8% and 70.5%. MLSS:3500mg/L,aerotion rate:1.0m3/h,8h for hydraulic retention time is the perfect controlling condition for aerobic treatment, when the removal rate of CODCr and chromaticity color respectively gets to 76.7% and 66.7%. Then treated by subsequent chemical oxidation and adsorption with fly ash, production water fits perfectably the exhaustion standard of national one class. All this shows us that the research data could be employed for the real project’s devise and further research, which could give some useful reference to the treatment of similar wastewater.更多还原