铁碳微电解-SBR工艺处理己内酰胺废水试验研究

A study of caprolactam wastewater treatment by iron-carbon microelectrolysis-SBR process

采用铁碳微电解-SBR工艺处理己内酰胺废水,考察了pH值、铁碳质量比、反应时间等因素对铁碳微电解处理效果的影响。试验结果表明：在进水CODCr的质量浓度为2 000~3 000mg/L,BOD5的质量浓度为1 000~1 500 mg/L,NH3-N的质量浓度为150 mg/L左右,色度约为120倍的条件下,当进水pH值为3,铁碳质量比为4∶1,反应时间为1.5 h时,铁碳微电解对CODCr、NH3-N、色度的去除率分别达到50.6%、41.8%、33.3%;己内酰胺废水经铁碳微电解-SBR工艺处理后,最终出水CODCr的质量浓度稳定在80 mg/L左右,BOD5的质量浓度稳定在15 mg/L以下,NH3-N的质量浓度小于15 mg/L,色度小于45倍,均达到GB 8978—1996《污水综合排放标准》中一级标准的要求。

Using iron-carbon micro-electrolysis-SBR process to treat caprolaetam wastewater, the influences of pH value, iron-carobn ratio, reaction time and some other factors on wastewater treatment effect by iron-carbon microelectrolysis were investigated. The results showed that： when the pH value of influent water was 3, the iron- carbon mass ratio was 4 ： 1, the reaction time was 1.5 h, the removal rates of CODCr,NH3-N and chroma reached 50.6%, 41.8% and 33.3% respectively. Under the condition that, the mass concentrations of CODCr, BOD5 and NH3-N of the influent caprolactam wastewater were 2 000 - 3 000, 1 000 - 1 500 and about 150 mg/L respectively, the chroma was about 120 times, the mass concentrations of CODCr and BOD5 in the effluent water from iron-carbon microelectrolysis -SBR process were finally stable at about 80 and below 15 mg/L respectively; besides, the mass concentration of NH3-N was lower than 15 mg/L and the chroma was below 45 times, which met the specification of grade 1 in GB 8978-1996 Intergrated Wastewater Discharge Standard.