摘要
利用中试装置考察了不同滤速(4.8、6.0、8.9 m/h)、碳源种类(乙酸钠、甲醇)及投加量等因素对反硝化生物滤池(DNBF)深度脱氮效果的影响,并采用实际再生水工程的运行数据进行了验证。结果表明,DNBF在不同碳源种类条件下均能达到较高的脱氮率(80%以上);碳源投加量是影响DNBF脱氮效率的关键因素,在8.9 m/h的高滤速下,以甲醇为碳源的最优C/N值为5.0,此时脱氮率可达到70%以上;采用中试得出的优化参数运行的实际再生水工程脱氮效果良好,出水TN稳定在15 mg/L以下,满足国家和北京市相关标准。
A pilot-scale denitrification biofiher （DNBF） was used to investigate the influence of filtration velocities （4.8 m/h, 6.0 m/h and 8.9 m/h）, types of external carbon sources （ sodium acetate and methanol） and their dosages on the advanced nitrogen removal. The results showed that DNBF could achieve a high nitrogen removal （ 〉 80% ） under different types of external carbon source. The dosage of carbon source was a key factor for nitrogen removal. When the optimal C/N was 5.0 at a filtration veloci- ty of 8.9 m/h and with methanol as a carbon source, the nitrogen removal rate could be over 70%. TN concentration in the effluent from a full-scale reclaimed water treatment plant using the optimal factors was less than 15 mg/L, which could meet the relevant discharge standards of Beijing and China.
出处
《中国给水排水》
CAS
CSCD
北大核心
2016年第21期132-136,共5页
China Water & Wastewater
基金
国家高技术研究发展计划(863)项目(2013AA065205)
关键词
反硝化滤池
脱氮
滤速
碳源
再生水
denitrification biofilter
nitrogen removal
filtration velocity
carbon source
reclaimed water
