Abstract: Coal gasification wastewater has been treated by coupling ozone with hydrogen peroxide method,and the influences of the ratio n(O₃):n(H₂O₂) on the treatment effect investigated. The optimum ratio n(O₃):n(H₂O₂) obtained is 0.8. The removing rate of COD can reach about 40% and the removing rate of volatile phenols can be near 100%,the removing rates of UV₂₅₄ and UV₄₁₀ are about 80% and above 90%,respectively. The BOD₅/COD of the reacted effluent can be above 0.5 and biological toxicity is reduced from high toxicity to low toxicity. The biodegradability of the effluent is improved,and the conditions of subsequent biological treatment satisfied. The pretreatment cost of the wastewater is about RMB 9/m₃.

Key words: ozonation, lignite gasification wastewater, hydrogen peroxide, pretreatment

摘要： 对煤气化废水进行臭氧耦合过氧化氢氧化处理，考察n（O₃）∶n（H₂O₂）对处理效果的影响，得到最佳n（O₃）∶n（H₂O₂）=0.8。此时COD去除率可达40%左右，挥发酚的去除率可接近100%，UV₂₅₄的去除率可达80%左右，UV₄₁₀的去除率可达90%以上。反应后出水的BOD₅/COD达0.5以上，生物毒性由剧毒降低为低毒，提高了可生化性，满足后续生物处理的条件，经济成本约为9元/t。

关键词: 臭氧氧化, 褐煤气化废水, 过氧化氢, 预处理

CLC Number: 

• X703