文献类型：期刊文献

中文题名：宝钢焦化废水处理脱氮研究与实践

英文题名：Research and practice for total nitrogen removal in Baosteel coking wastewater treatment

作者：金学文[1,2];李恩超[1];吕树光[1];邱兆富[1];杨帆[2]

机构：[1]华东理工大学国家环境保护化工过程环境风险评价与控制重点实验室,上海200237;[2]上海宝钢化工有限公司,上海201901

年份：2014

卷号：8

期号：5

起止页码：1965

中文期刊名：环境工程学报

外文期刊名：Chinese Journal of Environmental Engineering

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

语种：中文

中文关键词：焦化废水;生物脱氮;反硝化碳源;工艺改造

外文关键词：coking wastewater;;biological nitrogen removal;;carbon source for denitrification;;process modification

摘要：针对上海提高新排放标准中总氮(TN)≤35 mg/L的要求,对焦化废水进行了脱氮研究。选取现场缺氧-好氧-好氧(A-O-O)工艺中前两段的A-O生化沉淀池1出水,在SBR内进行反硝化脱氮实验,考察葡萄糖、葡萄糖+乙酸钠、甲醇和甲醇+乙酸钠单一或复合碳源及投加反硝化菌种对脱氮的影响,确定最佳碳源为甲醇+乙酸钠,最佳反硝化水力停留时间为16 h。当反硝化菌液投加浓度为1 mg/L时,SBR出水TN满足达标排放要求。结合实验结果对宝钢焦化废水原有AO-O工艺改造升级为A-O-A-O二段脱氮工艺,并对生化出水实施进一步的物化混凝处理。改造后,工艺长期运行稳定,最终出水完全达到上海市污水综合排放标准(DB 31/199-2009)TN≤35 mg/L的要求,并满足氰化物、氟化物以及COD的排放要求。
Total nitrogen(TN) removal from coking wastewater was investigated aiming for the achievement of effluent TN≤35 mg/L target of the new discharge standard issued in Shanghai.The wastewater from the effluent of sedimentation tank after anoxic-oxic(A-O) treatment in its currently operating anoxic-oxic-oxic(A-O-O) process was used for further denitrification test in a SBR reactor,in which glucose,glucose + sodium acetate, methanol,or methanol + sodium acetate were added as an external carbon source for nitrogen removal.The experimental results showed that methanol + sodium acetate was the best external carbon and the optimum HRT was 16 hrs.With the extra addition of solution containing denitrifier(1.0 mg/L) the SBR effluent could satisfy the discharge standard for TN.Based on the above lab-scale tests the former A-O-O coking wastewater treatment process was modified to anoxic-oxic-anoxic-oxic(A-O-A-O) process with two-stage nitrogen removal,and the effluent was further treated through coagulation process.The full-scale plant was operated steadily after modification and its effluent reached the T-CN,F-,COD and the new TN discharge standard.