微波联合活性炭纤维处理剩余污泥的研究

Treatment of Excess Sludge by Microwave Assisted Activated Carbon Fiber

利用活性炭纤维吸波能力强,重复利用的性能,以其为催化剂,联合微波辐射对剩余污泥进行催化氧化预处理。结果表明,当微波功率700 W,辐照时间60 s,活性炭纤维投加量0.32 g/g SS,污泥分解率可达30.9%,与单独微波辐照相比,污泥分解率增大一倍。由于微生物胞外聚合物(EPS)被分解、胞内物质释放到液相中,使污泥上清液中SCOD浓度从380 mg/L增至2 400 mg/L,TN、TP的浓度分别增加了3.1倍和2.1倍,同时污泥溶液中的蛋白质和多糖浓度也显著增加。在微波-活性炭纤维的催化氧化作用下,部分有机氮被矿化,使污泥上清液中的NH4+-N浓度由10 mg/L增至82 mg/L。

Excess sludge was treated by microwave assisted catalytic oxidation using activated carbon fiber as catalysts which has strong microwave-absorbing and recycle ability.Results indicated that microwave irradiation combined with activated carbon fiber increased the lysis of excess sludge.In the optimal operation of 700 W microwave irradiation power,microwave irradiation time of 60 s and activated carbon fiber dosage of 0.32 g/g SS,the sludge dissolving rate increased to 30.9%,which was doubled compared with the simple microwave treatment.In the operation,more microbial extracellular polymeric substances（EPS） were decomposed,and more intracellular matters were released to liquid phase.Concentration of SCOD increased from 380 mg/L to 2 400 mg/L,concentration of TN,TP increased by 3.1 and 2.1 times respectively than single microwave processing,the protein contents and total sugar contents also increased significantly.Part of organic nitrogen was mineralized by oxidants to NH4＋-N from 10mg/L to 82 mg/L.