[1]贺阳,袁玉亮,王进峰,等.超高浓度总氮废水生物脱氮工艺运行实例[J].中国给水排水,2021,37(20):116-120.
HE Yang,YUAN Yu-liang,WANG Jin-feng,et al.An Operation Case of Biological Denitrification Process for Ultra-high Total Nitrogen Wastewater[J].China Water & Wastewater,2021,37(20):116-120.
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HE Yang,YUAN Yu-liang,WANG Jin-feng,et al.An Operation Case of Biological Denitrification Process for Ultra-high Total Nitrogen Wastewater[J].China Water & Wastewater,2021,37(20):116-120.
超高浓度总氮废水生物脱氮工艺运行实例
中国给水排水[ISSN:1000-4062/CN:12-1073/TU]
卷:
第37卷
期数:
2021年第20期
页码:
116-120
栏目:
出版日期:
2021-10-17
- Title:
- An Operation Case of Biological Denitrification Process for Ultra-high Total Nitrogen Wastewater
- Keywords:
- high concentration of total nitrogen; stainless steel mixed acid wastewater; integrative biological reactor (IBR); biological denitrification process
- 摘要:
- 某冷轧不锈钢企业的混酸废水处理工程采用的IBR反硝化工艺具有沉淀池前置、高比例污泥回流等特点，污泥浓度（MLVSS）能维持在10 000 mg/L以上，缺氧段的污泥负荷为10~30 mgTN/（gMLVSS·d），能将废水总氮（硝态氮占比≥98%）从400~1 200 mg/L降至15 mg/L以下，一步实现达标排放，总氮去除率≥99.0%。实际处理超高浓度总氮废水时，诸如甲醇投加方式以及系统ORP、DO等情况，与处理低浓度总氮废水时有明显差异；在进行超高浓度废水工艺设计时，还应考虑生化放热对系统的影响。该工艺仍存在结垢、短流、翻泥等不足，可以通过加强运行管理来弥补，以确保稳定达标排放。
- Abstract:
- The IBR denitrification process used in the mixed acid wastewater treatment project of a cold rolling stainless steel factory has the characteristics of pre-sedimentation tank and high sludge return rate. The MLVSS was maintained above 10 000 mg/L, and the total nitrogen load of sludge in the anoxic section was 10-30 mgTN/(gMLVSS·d). It could reduce the total nitrogen of wastewater (nitrate nitrogen ratio≥98%) from 400-1 200 mg/L to less than 15 mg/L, which achieved discharge standard in one step, and the total nitrogen removal rate was ≥99.0%. There were obvious differences between the processing of ultra-high nitrogen wastewater and low concentration nitrogen wastewater, such as methanol dosing mode, ORP and DO in the system. The effect of biochemical exothermic should also be considered in the process design. There were still some shortcomings in the process, such as scaling, short flow, sludge turning, etc., which could be mitigated by operation management to guarantee that the standard discharge.
更新日期/Last Update:
2021-10-17