用催化氧化法处理焦化高浓度含酚废水

研究了FeSO₄-H₂O₂体系催化氧化处理焦化高浓度含酚废水的工艺条件.结果表明：优化处理条件是反应温度为30 ℃，Fe²⁺用量为200 mg/L，H₂O2用量为1 000 mg/L、反应时间为45 min.在该条件下处理废水，酚和COD的去除率分别可达到68.5％和70.4％，然后加入Ca(OH)₂将氧化处理后废水的pH值调至弱碱性进行絮凝，可显著降低废水中的铁离子及CN^-质量浓度，且COD去除率提高到85.2％，同时废水的可生化性得到显著提高，为后续生物处理创造了良好的条件.

Treatment of wastewater by the catalytic-oxidation way toxic phenols

The technical conditions of wastewater treatment in coking plant by the catalytic oxidation way with ferrous sulfate and hydrogen peroxide were studied. The optimum technical conditions obtained are  that the reaction temperature is 30 ℃， the amount of Fe2+ is 200 mg/L， the amount of hydrogen peroxide is 1 000 mg/L， the reaction time is 45 min. The results show that under the optimum technical conditions， the removal rate of phenols and COD are 68.5% and 70.4%， and then calcium hydroxide is added to adjust the pH value of treated waste water to weak alkaline and is flocculated， the mass concentration of Fe ion and CN- decreases remarkably， and COD removal rate increases to 85.2%， the biodegradability of wastewater is improved evidently and the good conditions for following bio treatment are created.