铁碳内电解耦合生物厌氧反硝化促进低C/N条件下脱氮
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摘要
缺乏有机碳源污水中硝酸盐氮难以生物转化,以投加Fe~((0))-活性炭尝试弥补生物厌氧脱氮过程中缺乏的有机碳,并筛选了铁碳的最优投加比例(质量比)。结果表明,铁碳的投加可以对生物反硝化起促进作用,铁碳内电解可以有效减少微生物在反硝化时对碳源的依赖。固定铁的质量为5 g,COD为135 mg/L,在C/N=3且投加铁碳比例为2:1时,反硝化率由52.1%提升到83.3%;将C/N降低至2.25,设置铁碳比例为1:1至5:1的五组实验组的反硝化率均在90%以上,铁碳比例越大生成氨氮越多;当投加m(铁):m(碳)为1:1时反硝化率由41.99%提升到93.84%,且生成亚硝氮与氨氮相对其他各组较少。
The lack of organic carbon source wastewater nitrate nitrogen is difficult to biotransform, and Fe(0)-activated carbon was added to try to reduce the organic carbon required in biological anaerobic denitrification process, and the optimal dosage ratio of iron and carbon was screened(mass ratio). The results showed that the addition of iron and carbon could promote the biological denitrification, and the iron-carbon internal electrolysis could effectively reduce the dependence of microorganisms on carbon sources during denitrification. The mass of fixed iron was 5 g and the concentration of COD was 135 mg/L. When C/N was 3 and the ratio of iron to carbon was 2:1, the denitrification rate was increased from 52.1% to83.3%. The C/N ratio was reduced to 2.25, and the denitrification rates of the five experimental groups with the ratio of iron to carbon of 1:1 to 5:1 were all above 90%. The larger the ratio of iron to carbon, the more ammonia nitrogen was produced; When m(iron) : m(carbon) was 1:1, the denitrification rate increased from 41.99% to 93.84%, and the formation of nitrous oxide and ammonia nitrogen was less than that of other groups.
The lack of organic carbon source wastewater nitrate nitrogen is difficult to biotransform, and Fe(0)-activated carbon was added to try to reduce the organic carbon required in biological anaerobic denitrification process, and the optimal dosage ratio of iron and carbon was screened(mass ratio). The results showed that the addition of iron and carbon could promote the biological denitrification, and the iron-carbon internal electrolysis could effectively reduce the dependence of microorganisms on carbon sources during denitrification. The mass of fixed iron was 5 g and the concentration of COD was 135 mg/L. When C/N was 3 and the ratio of iron to carbon was 2:1, the denitrification rate was increased from 52.1% to83.3%. The C/N ratio was reduced to 2.25, and the denitrification rates of the five experimental groups with the ratio of iron to carbon of 1:1 to 5:1 were all above 90%. The larger the ratio of iron to carbon, the more ammonia nitrogen was produced; When m(iron) : m(carbon) was 1:1, the denitrification rate increased from 41.99% to 93.84%, and the formation of nitrous oxide and ammonia nitrogen was less than that of other groups.
引文
[1]刘忻,马鲁铭.催化铁技术在脱氮除磷中的应用进展[J].工业水处理,2011,31(05):1-4.
[2]周栋,韩宝平.废水反硝化除磷技术应用研究进展[J].环境科学与管理,2008(03):104-106+155.
[3]刘振中,邓慧萍,詹健.零价铁在水处理技术中的研究现状及发展趋势[J].工业水处理,2007(10):13-16.
[4]邹伟国,张善发,张辰,等.新型双污泥脱氮除磷工艺处理生活污水[J].中国给水排水,2004(06):16-18.
[5]沈耀良,王宝贞.废水生物处理新技术:理论与应用[M].北京:中国环境科学出版社,2006:196-205.
[6]KUBA T,VAN LOOSDRECHT M C M,HEIJNEN J J.Phosphorus and nitrogen removal with minimal cod requirement by integration of denitrifying dephosphatation and nitrification in a two-sludge system[J].Water Research,1996,30(7):1702-1710.
[7]王子,马鲁铭.催化铁还原技术在工业废水处理中的应用进展[J].中国给水排水,2009,25(06):9-13+18.
[8]石晶.催化铁内电解法混凝作用及拓展[D].上海:同济大学,2007.
[9]马鲁铭.废水的催化还原处理技术:原理及应用[M].北京:科学出版社,2008:17-310.
[10]杨敏,孙永利,郑兴灿,等.不同外加碳源的反硝化效能与技术经济性分析[J].给水排水,2010,46(11):125-128.
[11]章非娟,杨殿海,傅威.碳源对生物反硝化的影响[J].给水排水,1996(07):26-28+4.
[12]周律,彭标.微量元素对工业废水好氧生物处理的促进[J].清华大学学报(自然科学版),2015,55(06):653-659.
[13]郝春红,张峰,张鹏,等.微量元素对活性污泥脱氮除磷效果影响的对比试验研究[J].青岛理工大学学报,2011,32(04):78-83.
[14]刘祚希,苏会东.微量Fe?Co?Ni对厌氧污泥活性的影响[J].当代化工,2010,39(01):108-111.
[15]梁威,胡洪营,王慧,等.微量营养物质对毛纺废水生物处理效果的影响[J].给水排水,2005(11):53-56.
[16]DENG Shihai,LI Desheng,YANG,Xue et al Process of nitrogen transformation and microbial community structure in the Fe(0)-carbon-based bio-carrier filled in biological aerated filter[J].Environmental Science and Pollution Research,2016,23(7).
[2]周栋,韩宝平.废水反硝化除磷技术应用研究进展[J].环境科学与管理,2008(03):104-106+155.
[3]刘振中,邓慧萍,詹健.零价铁在水处理技术中的研究现状及发展趋势[J].工业水处理,2007(10):13-16.
[4]邹伟国,张善发,张辰,等.新型双污泥脱氮除磷工艺处理生活污水[J].中国给水排水,2004(06):16-18.
[5]沈耀良,王宝贞.废水生物处理新技术:理论与应用[M].北京:中国环境科学出版社,2006:196-205.
[6]KUBA T,VAN LOOSDRECHT M C M,HEIJNEN J J.Phosphorus and nitrogen removal with minimal cod requirement by integration of denitrifying dephosphatation and nitrification in a two-sludge system[J].Water Research,1996,30(7):1702-1710.
[7]王子,马鲁铭.催化铁还原技术在工业废水处理中的应用进展[J].中国给水排水,2009,25(06):9-13+18.
[8]石晶.催化铁内电解法混凝作用及拓展[D].上海:同济大学,2007.
[9]马鲁铭.废水的催化还原处理技术:原理及应用[M].北京:科学出版社,2008:17-310.
[10]杨敏,孙永利,郑兴灿,等.不同外加碳源的反硝化效能与技术经济性分析[J].给水排水,2010,46(11):125-128.
[11]章非娟,杨殿海,傅威.碳源对生物反硝化的影响[J].给水排水,1996(07):26-28+4.
[12]周律,彭标.微量元素对工业废水好氧生物处理的促进[J].清华大学学报(自然科学版),2015,55(06):653-659.
[13]郝春红,张峰,张鹏,等.微量元素对活性污泥脱氮除磷效果影响的对比试验研究[J].青岛理工大学学报,2011,32(04):78-83.
[14]刘祚希,苏会东.微量Fe?Co?Ni对厌氧污泥活性的影响[J].当代化工,2010,39(01):108-111.
[15]梁威,胡洪营,王慧,等.微量营养物质对毛纺废水生物处理效果的影响[J].给水排水,2005(11):53-56.
[16]DENG Shihai,LI Desheng,YANG,Xue et al Process of nitrogen transformation and microbial community structure in the Fe(0)-carbon-based bio-carrier filled in biological aerated filter[J].Environmental Science and Pollution Research,2016,23(7).