摘要
研究了序批式生物反应器(SBR)—芬顿氧化工艺对焦化反渗透浓水(以下简称浓水)的TN和COD去除率,采用全二维气相色谱—飞行时间质谱(GC×GC—TOF/MS)解析了处理过程中有机物的组成变化。结果表明:(1)SBR稳定运行225d,浓水经过SBR处理后出水TN平均质量浓度为10mg/L,去除率为79.2%,达到了《炼焦化学工业污染物排放标准》(GB 16171—2012)的排放限值(20mg/L);(2)当pH=4.0,Fe2+质量浓度为200mg/L,芬顿氧化出水COD平均质量浓度可降至60mg/L左右,SBR—芬顿氧化工艺对COD的去除率可达44.4%,也达到了GB 16171—2012的排放限值(80mg/L);(3)目标筛查共检出8种多环芳烃,浓水进水、SBR出水和芬顿氧化出水的多环芳烃总质量浓度分别为1.950、1.390、0.917μg/L,组合工艺对多环芳烃的去除率达到50%以上;(4)GC×GC—TOF/MS非目标筛查在浓水进水、SBR出水和芬顿氧化出水中分别检出237、125、53种化合物。
The removal efficiencies of COD and TN in reverse osmosis concentrated coking wastewater by SBRFenton oxidation process were investigated.The main organic pollutants were analyzed by GC×GC-TOF/MS.Results showed that：（1）after SBR running for 225 d,TN average mass concentrations in effluent of SBR was 10mg/L with removal efficiency of 79.2%,meeting the requirement（20 mg/L）of ＂Emission standard of pollutants for coking chemical industry＂（GB 16171-2012）;（2）when pH=4.0and Fe2＋mass concentrations was 200mg/L,COD average mass concentrations in effluent of Fenton oxidation was as low as 60 mg/L with the COD removal efficiency of44.4%,meeting the requirement（80 mg/L）of GB 16171-2012;（3）there were 8polycyclic aromatic hydrocarbons（PAHs）detected by target screening.The total mass concentrions of PAHs in influent,SBR effluent and Fenton oxidation effluent were 1.950,1.390 and 0.917μg/L,respectively.The removal efficiencies were all over 50%;（4）GC×GC-TOF/MS non-target analysis showed that 237,125 and 53kinds of organic pollutants were screened in influent,SBR effluent and Fenton oxidation effluent,respectively.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2016年第4期66-69,77,共5页
Environmental Pollution & Control
