动态生物膜—电化学耦合处理炸药废水的研究

炸药生产和使用过程中排放的高浓度难降解废水严重污染周边环境,进行了以动态膜为载体处理NH4+-N和电催化氧化处理TNT的耦合处理技术研究。实验结果表明,电解时间超过1 000 min时,TNT去除率趋于稳定,合理投加催化剂Ti O2能有效提高TNT去除率,在电解时间为300 min条件下,投加Ti O2量分别为1 g和2 g时,TNT去除率分别增加33.5%和25.0%;SFDMBR反应器对废水中CODcr去除率受进水流量影响较小,而NH4+-N去除率由8 L/h的92.8%下降至20 L/h时的42.3%;在进水流量为10 L/h、HRT为10 h和NH4+-N进水浓度小于70 mg/L时,NH4+-N出口浓度小于6.8 mg/L。利用动态膜与电化学耦合处理含TNT废水具有较高的处理效率,对减少污染物排放具有较高的社会意义。

The surrounding environment had been polluted seriously by high concentrations of refractory wastewater from the production and use of TNT. The experiment with SFDMBR and catalytic oxidation technology for treating the TNT wastewater is conducted, the results showed： electrolytic time exceeds 1 000 min, TNT removal rate was stable; TNT removal rate had been improved effectively reasonable when adding the catalyst TiO2 reasonable; TNT removal rate had been increased by 33.5% and 25.0% respectively when TNT wastewater had added the amount of TiO2 was 1 g and 2 g respectively under the condition of electrolysis time of 300 min. SFDMBR reactor CODer removal rate in wastewater had been influenced by water flow was smaller, and NH4＋-N removal rate by 92.8% of 8 L/h had been dropped to 42.3% of 20 L/h; NH4＋-N concentration had been less than 6.8 mg/L when the water flow of 10 L/h, HRT for 10 h and NH4^-N concentration was less than 70 mg/L. It was highly efficient that disposing TNT wastewater with SFDMBR and electro-chemical, and it had had high social significance for reduce pollutants discharge.