摘要
根据炼油厂废水水质情况,利用现有装置和条件,通过改进工艺,重点控制生物硝化条件,达到降低出水氨氮质量浓度、废水达标排放的要求。将均质池做为曝气池前有机物的预处理装置,曝气池进水COD可由420 mg/L降至322 mg/L,平均COD去除率为23.3%。在均质池和接触氧化池的进水处投加NaOH溶液,使系统pH稳定为弱碱性,出水氨氮质量浓度可稳定在5.0 mg/L以下,平均氨氮去除率由23.5%提高至87.5%。
Based on the refinery wastewater quality and the existing equipments, the treatment process was improved with focus on the control of bio-nitration conditions. The ammonia nitrogen mass concentration of the effluent is decreased and the effluent quality can meet the discharge standards. The homogenizer is used as pretreatment equipment before the aeration basin, the influent COD of the aeration basin can be decreased from 420 mg/L to 322 mg/L with 23.3 % of average COD removal rate. Adding NaOH solution into the influents of the homogenizer and the contact oxidation pond can keep the system pH alkalescent, the ammonia nitrogen mass concentration of the effluent can be kept below 5.0 mg/L and the average ammonia nitrogen removal rate can be increased from 23.5% to 87.5%.
出处
《化工环保》
CAS
CSCD
北大核心
2011年第5期444-446,共3页
Environmental Protection of Chemical Industry
关键词
炼油废水
硝化
氨氮
废水处理
refinery wastewater
nitration
ammonia nitrogen
wastewater treatment
