两级水解酸化-FCR系统处理印染废水

Dyeing wastewater treatment with a two-stage hydrolysis acidification-FCR system

摘要: 采用两级水解酸化-FCR系统处理印染废水,考察了不同水力停留时间(HRT)对COD、色度、NH₃-N和苯胺等去除效果的影响,并对最佳水力停留时间时脱氮效果进行了研究.结果表明:当HRT为30h时,系统COD、色度、TN、NH₃-N和苯胺的平均去除率分别为93.3%、81.9%、79.9%、98.1%和74.8%,出水满足《GB 4287-92纺织染整工业水污染物排放标准》的一级标准.该系统具有较高的去污脱色效果,脱氮效果尤其显著,可应用于中、高浓度印染废水的处理.

Abstract: Dyeing wastewater was treated with a two-stage system of hydrolysis acidification and food chain reactor (FCR). The influences of hydraulic retention time (HRT) on the removal efficiency of COD, chromaticity, NH3-N and anilin were examined, and the mechanism and efficiency of nitrogen removal at the optimum HRT were discussed. When HRT was 30 h, the average removal ratios of COD, chromaticity, TN, NH₃-N and anilin were 93.3%, 81.9%, 79.9%, 98.1% and 74.8%, respectively. The effluent average concentrations of COD, chromaticity, TN, NH₃-N and anilin all met the first level of China Textile and Dyeing Industry Water Pollutants Discharge Standard (GB 4287—92). It is shown that this system, which not only removes both color and organic matter effectively, but also has great removal effect on nitrogen, can be used in treating high-and middle-concentration dyeing wastewater.