Nitrous Oxide Production Characteristic During Endogenous Denitrification
-
摘要: 为了控制污水处理过程温室气体氧化亚氮(N2O)的排放量和提高污水处理厂产能,提出了强化反硝化过程中N2O积累,而后用N2O氧化甲烷提高燃烧产能同时减少N2O排放的方法.通过研究内源反硝化过程中N2O的产生特征得出,以硝酸盐(NO3-)作为电子受体的内源反硝化过程会出现亚硝酸盐(NO2-)和N2O的积累,且二者同时出现;当以不同质量浓度的NO2--N(13~90 mg/L)作为电子受体进行内碳源反硝化时得出,高ρ(NO2--N)会同时抑制NO2-和N2O的还原过程,从而使得内源反硝化过程中出现N2O的积累.基于此结果提出通过调控ρ(NO2--N)来强化反硝化过程中N2O的积累,从而为N2O氧化甲烷提供基础.Abstract: In order to control greenhouse gas emission and improve energy production in wastewater treatment plants,a new method based on nitrous oxide(N2O) oxidizing methane was proposed with an increase in energy production from methane oxidation and a decrease in N2O emission. This study investigated N2O production characteristic during endogenous denitrification. The results showed that nitrite and N2O were accumulated simultaneously when nitrate was used as electron acceptor. Nitrite and N2O reduction were inhibited when nitrite concentration increased in the range of 13- 90 mg / L,resulting in N2O accumulation during endogenous denitrification process. Based on these results,to enhance N2O accumulation by adjusting nitrite concentration was proposed,which could provide the basis of methane oxidation using N2O sequentially.
-
-
[1] 王金鹤,张建.城镇污水处理厂SBR工艺中N2O的释放通量研究[J].山东建筑大学学报,2012(1):43-46.WANG Jin-he,ZHANG Jian.Nitrous oxide emissions from SBR wastewater treatment systems[J].Journal of Shandong Jianzhu University,2012(1):43-46.(in Chinese) [2] 巩有奎,王淑莹,彭永臻,等.低氧条件下生物反硝化过程中N2O的产量[J].化工学报,2011,62(6):1688-1692.GONG You-kui,WANG Shu-ying,PENG Yong-zhen,et al.Formation of N2O during denitrification process at low oxygen concentration[J].CIESC Journal,2011,62(6):1688-1692.(in Chinese) [3] 周兴,郑有飞,吴荣军,等.2003—2009年中国污水处理部门温室气体排放研究[J].气候变化研究进展,2012(2):131-136.ZHOU Xing,ZHENG You-fei,WU Rong-jun,et al.Greenhouse gas emissions from wastewater treatment in China during 2003—2009[J].Advances in Climate Change Research,2012(2):131-136.(in Chinese) [4] 王淑莹,委燕,马斌,等.控制污水生物处理过程中N2O的释放[J].环境科学与技术,2014,37(7):78-84.WANG Shu-ying,WEI Yan,MA Bin,et al.Control of nitrous oxiden emissions in biological wastewater treatment process[J].Environmental Science&Technology,2014,37(7):78-84.(in Chinese) [5] SCHERSON Y D,WELLS G F,WOO S G,et al.Nitrogen removal with energy recovery through N2O decomposition[J].Energy&Environmental Science,2013,6(1):241-248.
[6] ZHOU Y,LIM M,HARJONO S,et al.Nitrous oxide emission by denitrifying phosphorus removal culture using polyhydroxyalkanoates as carbon source[J].Journal of Environmental Sciences,2012,24(9):1616-1623.
[7] SAITO T,BRDJANOVIC D,van LOOSDRECHT M C.Effect of nitrite on phosphate uptake by phosphate accumulating organisms[J].Water Research,2004,38(17):3760-3768.
[8] RICHARDSON D,FELGATE H,WATMOUGH N,et al.Mitigating release of the potent greenhouse gas N2O from the nitrogen cycle-could enzymic regulation hold the key?[J].Trends In Biotechnology,2009,27(7):388-397.
[9] LI C,LIANG S,ZHANG J,et al.N2O reduction during municipal wastewater treatment using a two-sludge SBR system acclimatized with propionate[J].Chemical Engineering Journal,2013,222:353-360.
[10] 巩有奎,王淑莹,王莎莎.碳氮比对短程反硝化过程中N2O产生的影响[J].化工学报,2011,62(7):2049-2054.GONG You-kui,WANG Shu-ying,WANG Sha-sha.Effect of C/N ratio on N2O accumulation and reduction during nitrite denitrification process[J].CIESC Journal,2011,62(7):2049-2054.(in Chinese) [11] ALMEIDA J S,JULIO S M,REIS M A M,et al.Nitrite inhibition of denitrification by pseudomonas-fluorescens[J].Biotechnology and Bioengineering,1995,46(3):194-201.
[12] MA J,YANG Q,WANG S,et al.Effect of free nitrous acid as inhibitors on nitrate reduction by a biological nutrient removal sludge[J].Journal of Hazardous Materials,2010,175(1/2/3):518-523.
[13] CHEN C,WANG A,REN N,et al.High-rate denitrifying sulfide removal process in expanded granular sludge bed reactor[J].Bioresource Technology,2009,100(7):2316-2319
[14] MELLOR R B,RONNENBERG J,CAMPBELL W H,et al.Reduction of nitrate and nitrite in water by immobilized enzymes.[J].Nature,1992,355:717-719.
[15] OH J S J.Acetate limitation and nitrite accumulation during denitrification[J].Journal of Environmental Engineering,1999,125:234-242.
[16] GLASS C,SILVERSTEIN J.Denitrification kinetics of high nitrate concentration water:p H effect on inhibition and nitrite accumulation[J].Water Research,1998,32(3):831-839.
[17] GORELSKY S I,GHOSH S,SOLOMON E I.Mechanism of N2O reduction by theμ(4)-S tetranuclear Cu-z cluster of nitrous oxide reductase[J].Journal of American Chemical Society,2006,128:278-290.
[18] ZHOU Y,PIJUAN M,ZENG R J,et al.Free nitrous acid inhibition on nitrous oxide reduction by a denitrifying-enhanced biological phosphorus removal sludge[J].Environmental Science&Technology,2008,42(22):8260-8265.
计量
- 文章访问数: 37
- HTML全文浏览量: 4
- PDF下载量: 11
下载:
