木薯酒精废液的达标处理研究

Treatment of cassava alcohol waste liquid

经过TLP-GXEM厌氧技术处理后的木薯酒精废液COD的质量浓度从22 000～35 000 mg/L降到2 000～3 000 mg/L,BOD5与COD的质量比约为0.6,生化性良好。再采用SBR工艺进行后续处理,在进水COD、BOD5的质量浓度分别为2 450、1 350 mg/L,色度为225倍时,出水COD、BOD5的质量浓度分别降为300～500、60￣90 mg/L,色度降为220倍左右。由于好氧出水的可生化性很差,选用活性炭吸附作为深度处理,可以使废水COD降为100 mg/L以下,活性炭对COD的去除率达到了85%,并且脱色效果明显,出水的色度为8倍左右,活性炭对色度去除率高达96.4%,两者均达到污水综合排放标准一级排放标准。

After be treated by TLP-GXEM anaerobic technology, the mass concentration of COD in cassava alcohol waste liquor was reduced from 22 000 - 35 000 mg/L to 2 000 - 3 000 mg/L, the mass ratio between BOD5 and COD was about 0.6, which showed a good biochemical treatability. Then, using SBR process to further treat the waste liquor, when the mass concentration of COD, BOD5 in influent water were 2 450, 1 350 mg/L respectively, the colority was 225 times, the mass concentration of COD, BOD5 were reduced to 300 - 500, 60 - 90 mg/L respectively, and the colority was reduced to about 220 times. As the biochemical treatability of the effluent water after the aerobic treatment was so bad, activated carbon was used in the advanced treatment, which could decrease the mass concentration of COD of the wastewater, and let it below 100 mg/L; the removal rate of COD by activated carbon reached 85%; and the effect of it on the color removal was also obvious, the colority of the effluent water was about 8 times, the removal rate of the colority by activated carbon was as high as 96.4%. The quality of the effluent water reached the class-1 standard for the comprehensive discharging of wastewater.