摘要
在水解酸化-接触氧化法处理废纸造纸废水过程中,分别不断加入浓度逐渐升高的Cr^(6+)和Cu^(2+),研究其对生物膜系统处理效果及微生物毒性的影响。结果表明:当进水中Cr^(6+)浓度由0增加到60mg/L后,水解酸化段好氧及兼性厌氧微生物数量由5.5×10~5CFU/mL降低至3×10~5CFU/mL,系统出水COD_(cr)去除率由85%降低至53%;当进水中Cu^(2+)浓度由0增加到10mg/L后,水解酸化段好氧及兼性厌氧微生物数量由5.5×10~5CFU/mL降低至4.1×10~5CFU/mL,系统出水COD_(cr)去除率由85%降46%。说明同等浓度的铜离子对生物膜处理系统的毒性要比铬离子的更大。
In the process of hydrolytic acidification-biological contact oxidation for treating paper mill effluent, the influences of Cr^6＋ and Cu^2＋ on the treating effect and its toxicology to microbes were studied by gradually incrasing concentration of Cr^6＋and Cu^2＋. separately. The results show that when the concentration of reaches 60rag/ L from 0, the quantity of microbe in hydrolytic acidification reactor decreases from 5. 5 × 105 CFU/mL to 3 × 10^5 CFU/mL, the removal ratio Cu^2＋ reaches 10mg/L from 0, the quantity of microbe in hydrolytic acidification reactor decreases from 5.5 Cu^2＋ 105 CFU/mL to 4.1 × 10^5 CFU/ mL, the removal ratio of CODCr changes from 85% to 46 %. It proves that Cu^2＋ is more toxic to the treatment system than Cr^6＋ at the same concentration level.
出处
《中华纸业》
CAS
北大核心
2008年第6期43-46,共4页
China Pulp & Paper Industry
关键词
造纸废水
水解酸化
接触氧化
CR^6+
CU^2+
paper mill effluent
hydrolytic acidification
biological contact oxidation
Cr^6＋
Cu^2＋
