焦化废水前置好氧流化床处理的必要性解析

发布时间：2018-05-29 00:09

  本文选题：焦化 + 流化床　； 参考：《化工进展》2017年08期

【摘要】：针对碳氮比不协调、毒性组分多且厌氧困难的焦化废水,采用自行研制的新型生物三相流化床对其实施前置高负荷好氧处理,重点考察了反应器的好氧处理性能,并结合紫外-可见吸收光谱(UV-Vis)和GC-MS分析研究了好氧处理过程中主要有机成分的变化规律。结果表明,在进水COD平均浓度为4818.9mg/L、环境温度为28~33℃、溶解氧为1.0~1.5mg/L及污泥浓度为8.0g/L左右的条件下,当有机负荷处于3.53~3.74kg COD/(m3·d)范围内时,新型生物流化床可实现废水中的苯酚、吲哚及苯胺等化合物的降解,其COD、酚及SCN 的平均去除率分别达到70%、99%和80%以上,通过大幅度削减酚类化合物、SCN 和CN 等毒性物质的浓度而解除后续厌氧水解和好氧硝化过程的抑制瓶颈。因此,好氧生物流化床由于具有良好的混合传质性能和较高的污泥浓度,将其作为前置生物单元工艺处理含高浓度氨氮有毒难降解有机废水具有技术优势,是实现该类废水高效生物处理的必要保障。
[Abstract]:A new biological three-phase fluidized bed was developed to treat coking wastewater with uncoordinated carbon / nitrogen ratio, many toxic components and difficulty in anaerobic treatment. The aerobic treatment performance of the reactor was investigated with emphasis on the aerobic treatment performance of the reactor. The changes of main organic components during aerobic treatment were studied by UV-Vis-Vis and GC-MS. The results showed that when the average concentration of influent COD was 4818.9 mg / L, ambient temperature was 2833 鈩，

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