酸析—铁碳内电解预处理苎麻废水实验研究

Experimental Study on Ramie Wastewater Pre-Treatment by Acidification and Ferrous-Carbon Inner Electrolysis

采用酸析结合铁碳内电解法对苎麻废水进行预处理,探讨了pH调节条件及铁碳内电解法对废水处理效果的影响。结果表明,在室温下将废水pH调节至3.00时,由于其中部分有机物析出,CODcr可以从15789.47mg/L下降到11491.23mg/L,CODCr去除率达27.22%,色度去除率达83.58%;接着在pH=3.00,处理时间40min,铁碳加入量比废水(质量比)=1:5,铁比碳=3:1,温度30℃的最佳工艺条件下,用铁碳内电解法进一步处理废水,CODCr可以下降到6948.38mg/L,CODCr去除率接近80%。

Ramie wastewater was pre- treated by acidification combined with ferrous- carbon inner- electrolysis, probing into the influences of ferrous - carbon inner- electrolysis on the treatment of wastewater under pH - adjusted condition. The result showed that under room temperature, with wastewater＇s pH adjusted to 3.00 and because of emission of organic substance, CODc, decreased from 15,789.47mg/L to 11,491.23mg/L, the removal rate of CODcr and color removal rate reached 27.22% and 83.58% respectively; then with the best technical condition of pH equal to 3.00, 40min of treatment time and the ratio of 3：1 between Fe and Carbon, the mass ratio of wastewater of 1：5 and the temperature of 30℃, CODcr could be reduced to 6,948.38mg/L and CODcr removal rate reached about 80% by ferrous- carbon inner-electrolysis treatment.