Abstract:

The research on Fenton oxidation combined with ammonia stripping for semi-coking wastewater pretreatment has been studied. The influential factors and removal efficiencies of COD， chroma and ammonia-nitrogen are investigated. When the water sample volumn is 100 mL， the results show that the optimal conditions of Fenton oxidation are as follows： the dosage of H₂O₂is 40mL，n（H₂O₂）∶n（Fe²⁺）=20， and pH=6. Ammonia stripping technical conditions are： temperature=60 ℃, and pH=11. Under these conditions， the removal rates of COD， chroma and ammonia-nitrogen can reach 95.72%，95% and 88%， respectively. The biodegradability is improved by 4 to 5 times.

Key words: semi-coking wastewater, Fenton oxidation, ammonia stripping, pretreatment

摘要：

采用Fenton氧化—吹脱法进行了兰炭废水预处理试验研究,分别考察了COD、色度和氨氮的去除效果及其影响因素。结果表明,处理100 mL的兰炭废水时,Fenton氧化的最佳工艺条件为:30%的H₂O₂投加量为40 mL、n(H₂O₂)∶n(Fe²⁺)=20、pH=6;吹脱除氨的最佳工艺条件为:温度为60℃、pH=11;在此条件下,Fenton氧化—吹脱法对COD、色度和氨氮的去除率分别达到了95.72%、95%和88%,废水的可生化性提高了4～5倍。

关键词: 兰炭废水, Fenton氧化, 吹脱除氨, 预处理

CLC Number: 

• X703.1