铁铝微电解催化预处理在印染废水中的应用研究

Application of Fe and Al Micro Electrolysis Pretreatment in Printing and Dyeing Wastewater

针对高浓度印染废水成分复杂、水质变化大、可生化性差等特点,作为强化处理后的新型预处理工艺。绍兴市某工业园区污水处理厂进水主要为印染废水以及少量生活污水,以此开展催化铁铝微电解法预处理印染化工废水的研究,结果表明,预处理进水COD为800~900 mg/L的印染废水,反应2 h后COD可降至300 mg/L左右,去除率达60%以上,远高于不曝气的传统预处理工艺段,且色度去除效果较好,同时提高了化工废水的B/C,降低了水体中难降解污染物对水处理生化系统的不利影响。

Aiming at the characteristics of high concentration printing and dyeing wastewater, such as complex composition, large change of water quality and poor biodegradability, it is used as a new pretreatment process after enhanced treatment. The influent of a sewage treatment plant in an industrial park in Shaoxing is mainly printing and dyeing wastewater and a small amount of domestic sewage. Based on the influent conditions of sewage plant, we carry out the research about pretreatment of printing and dyeing chemical wastewater by Fe and Al micro electrolysis. The results show that when the COD of the pretreatment influent of printing and dyeing wastewater is 800~900 mg/L, it can be reduced to about 300 mg/L after 2 hours of reaction, and the removal rate is more than 60%, which is much higher than the traditional pretreatment process, and the chroma removal effect is good, the B/C of chemical wastewater is improved, and the adverse impact of refractory pollutants in water on the biochemical system of water treatment is reduced.