黑臭河道内源硫对硝酸盐异化还原过程的影响研究进展

EFFECT OF ENDOGENOUS SULFUR ON DISSIMILATORY NITRATE REDUCTION PROCESSES IN MALODOROUS RIVER: A REVIEW

反硝化、厌氧氨氧化(ANAMMOX)和硝酸盐异化还原成铵(DNRA)是重要的硝酸盐异化还原途径。内源硫作为黑臭河道的主要"致黑"和"致臭"因子,其对硝酸盐异化还原过程的影响不容忽视。在总结国内外关于底泥内源硫对反硝化、ANAMMOX以及DNRA影响研究现状基础上,结合当前黑臭河道"总氮去除率低"的技术瓶颈,系统分析了加强沉积物内源硫与硝酸盐异化还原过程耦合机制研究的必要性,并对氮循环与其他生物地球化学循环耦合过程研究提出展望,为解决黑臭河道治理过程中氮难以去除难题和改善黑臭提供参考。

Denitrification, anaerobic ammonium oxidation （ANAMMOX） and dissimilatory nitrate reduction to ammonium （DNRA） were considered as the crucial dissimilatory nitrate reduction processes. As key blackening and ordor-causing factors for malodorous rivers, the effect of endogenous sulfur couldn＇t be ignored on dissimilatory nitrate reduction processes. Based on the sunmmery of the domestic and foreign research progress on the effect mechanism of denitrification, ANAMMOX and DNRA with endogenous sulfur, which was closely related to technical bottleneck the malodorousness of rivers, combined with the technical bottleneck of less removal rate of TN in malodorous rivers, the necessity of exploring the coupling mechanism for endogenous sulfur with dissimilatory nitrate reduction processes was analyzed systematically. Future perspectives of related research were also discussed in terms of coupled N-cycling with other biogeochemical cycles, which would provide referential significance for simultaneous nitrogen removal and malodorousness mitigation in treating malodorous rivers.