固定化生物与Fenton组合工艺处理造纸终端废水的研究

发布时间：2018-09-01 12:42

【摘要】：本文在工艺设计中将移动床生物膜反应器与固定床生物膜反应器进行有机重组形成一体化的固定化生物处理装置,作为生物深度处理单元,然后将该组合反应器和Fenton试剂氧化法联用对造纸终端废水进行深度处理,最后通过两种工艺单独用于造纸终端废水的处理以及两工艺组合应用处理造纸终端废水处理效果及处理成本的比较,就固定化生物工艺在造纸终端废水深度处理中的应用进行了研究并提出一种新型造纸终端废水处理工艺。在固定化生物组合反应器单独用于造纸终端废水深度处理的实验研究中,主要考察进出水pH、浊度、色度、氨氮以及COD的变化情况,我们发现该组合工艺对于pH的变化影响不明显,出水pH略有升高；浊度变化明显,最终出水浊度可达10NTU以下；出水色度在设备稳定运行以后基本在10倍以下；最终废水中氨氮的去除率可达84%以上。由水质变动造成的水质指标与原设计参数不符合以及运行过程中活性炭填料在反应器内流化不理想等因素的影响,反应器对于COD的去除效果相对较为不理想,去除率达69%,但是反应器出水水质波动小、较为稳定。在实验过程中我们还重点考察了该组合反应器对于水量、水质变动产生的冲击负荷的抵抗能力,经研究发现,无论是由水量变化产生的冲击负荷还是污染物浓度变化产生的冲击负荷,该组合反应器均具有良好的抗冲击能力,出水稳定性良好。Fenton试剂氧化法在造纸终端废水的处理中对于COD的去除具有良好的效果,在其应用于造纸终端废水的深度处理的过程中出水水质良好,但是该工艺具有物理化学法的共同缺点：加药量大、处理成本高、会产生大量难处理的化学泥浆。造纸终端废水经过固定化生物工艺处理以后,Fenton加药量大大减少。固定化生物与Fenton试剂氧化法联合应用到造纸终端废水的处理中,不仅可以保证良好的出水效果同时还大大降低了废水的处理成本,提高经济效益、社会效益。
[Abstract]:In this paper, the mobile bed biofilm reactor and the fixed bed biofilm reactor are organically reorganized to form an integrated immobilized biological treatment unit, which is used as the advanced biological treatment unit. Then the combined reactor and Fenton reagent oxidation process were combined to treat the papermaking terminal wastewater. Finally, the two processes are used separately to treat the terminal wastewater and to compare the treatment effect and cost of the two combined processes in the treatment of papermaking terminal wastewater. The application of immobilized biological process in advanced treatment of papermaking terminal wastewater was studied and a new treatment process of papermaking terminal wastewater was proposed. In the experimental study on the application of immobilized bioreactor to the advanced treatment of papermaking terminal wastewater, the changes of pH, turbidity, chroma, ammonia nitrogen and COD in the inlet and outlet water were investigated. We found that the combined process had no obvious effect on the change of pH, the effluent pH increased slightly, the turbidity changed obviously, the final effluent turbidity reached below 10NTU, the effluent chroma was less than 10 times after the stable operation of the equipment. The removal rate of ammonia nitrogen in the final wastewater can reach more than 84%. The water quality index caused by the change of water quality does not accord with the original design parameters, and the effect of the activated carbon filler on the fluidization of the reactor is not ideal in the process of operation, so the removal efficiency of COD in the reactor is relatively unsatisfactory. The removal rate reached 69%, but the effluent water quality of the reactor fluctuated little and was relatively stable. In the course of the experiment, we also studied the resistance of the combined reactor to the impact load caused by the change of quantity and water quality. The combined reactor has good impact resistance, regardless of the impact load caused by the change of water quantity or the change of pollutant concentration. The stability of effluent is good. Fenton reagent oxidation process has good effect on the removal of COD in the treatment of papermaking terminal wastewater, and the effluent quality is good in the process of its application in advanced treatment of papermaking terminal wastewater. But this process has the common disadvantage of physicochemical method: large dosage and high cost of treatment will produce a large number of refractory chemical mud. The dosage of Fenton was greatly reduced after the treatment of papermaking terminal wastewater by immobilized biological process. The combined application of immobilized organisms and Fenton reagent oxidation method in the treatment of papermaking terminal wastewater can not only ensure good effluent effect but also greatly reduce the cost of wastewater treatment and improve economic and social benefits.
【学位授予单位】：天津科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X703

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