活性炭吸附处理锂电池厂含酯废水及微波再生实验

采用活性炭吸附的方法对锂电池产生的含酯废水进行预处理,研究了吸附时间、初始pH值和活性炭投加量对废水COD去除的影响.吸附饱和后的活性炭用微波进行再生,考察了辐照时间、微波功率及再生次数对活性炭再生效果的影响.结果表明,当活性炭投加量为10g/L时,吸附60min,含酯废水的COD去除率为69.5%,可生化性从原水的0.05提高到0.25.当微波功率为420W、辐照时间为6min时,活性炭可被有效地再生,再生效率高达98.0%,活性炭损失率约为5.2%.再生前后活性炭的红外光谱图表明,活性炭表面官能团发生了变化,促进活性炭对污染物质的吸附.

The experimental study of activated carbon adsorption and microwave regeneration for the treatment of ester-containing wastewater from lithium-ion battery factory

Lithium-ion batteries became an important direction for the clean energy development, but the ester-containing wastewater produced from the battery factory was not suitable for direct biological treatment,for its high levels of COD and low biodegradability.The treatment of ester-containing wastewater by activated carbon adsorption method was investigated in this study, especially the effects of adsorption time, pH conditions and activated carbon dosage on the COD removal rate. The saturated activated carbon was regeneratedby microwaveafter adsorption. The effects of irradiation time and microwave power on the activated carbon regeneration were also studied. Under the optimum conditions of activated carbon dosage was 10g/L, adsorption time of60min, the wastewater COD removal rate was 69.5% and biodegradability of raw water was improvedfrom 0.05 to 0.25. Moreover, under the conditions of the microwave power was 420 W and the irradiation time was 6min, the activated carbon could be effectively regenerated, the regeneration efficiency was 98.0%, and only about 5.2% was lost in the regeneration process.The infrared spectra of activated carbon before and after regeneration showed thatthe surface functional groups of the activated carbonhad changed,thus improved the adsorption of pollutants.