Operating Characteristics of a DPR-SNED System Treating Low C/N Municipal Wastewater and Nitrate-containing Sewage

被引：0

作者：

Du S.-M. ^{[1
]}

Yu D.-S. ^{[1
]}

Bi C.-X. ^{[1
]}

Wang X.-X. ^{[1
]}

Chen G.-H. ^{[1
]}

Yuan M.-F. ^{[1
]}

Zhen J.-Y. ^{[1
]}

Zhang F. ^{[1
]}

Lü T.-T. ^{[1
]}

机构：

[1] School of Environmental Science and Engineering, Qingdao University, Qingdao

来源：

Huanjing Kexue/Environmental Science | 2019年 / 40卷 / 02期

关键词：

Denitrifying phosphorus removal (DPR); Municipal wastewater; Nitrate-contained sewage; Phosphorous accumulating organisms (PAOs); Simultaneous nitrification endogenous denitrification (SNED);

D O I：

10.13227/j.hjkx.201808090

中图分类号：

学科分类号：

摘要：

In order to realize the simultaneous treatment of low C/N municipal wastewater and high nitrate wastewater, a sequencing batch reactor (SBR), inoculated with activated sludge, was used to initiate the denitrifying phosphorus removal coupled with simultaneous nitrification and endogenous denitrification (DPR-SNED). The anaerobic/anoxic/hypoxic durations and dissolved oxygen (DO) concentration were appropriately controlled, and the nitrogen and phosphorus removal characteristics were examined. The experimental results demonstrated that, in the anaerobic/hypoxia operation mode, with an anaerobic duration of 3 h and DO concentration of 0.5-1.0 mg•L -1 , the simultaneous nitrification of phosphorus removal (SNEDPR) system successfully began in 60 d. The effluent PO 4 3- -P concentration was below 0.5 mg•L -1 , the nutrient and COD removal efficiencies were stably maintained above 90% and 80%, respectively, and the SNED efficiency and COD ins efficiency reached 70% and 95%, respectively. When the operation mode was anaerobic/anoxic/hypoxic and nitrate-containing sewage was added at the beginning of the anoxic stage, DPR-SNED was achieved with the effluent PO 4 3- -P concentration<0. 5 mg•L -1 , nutrient and COD removal efficiencies above 88% and 90%, respectively, and SNED efficiency and COD ins efficiency maintained at 62% and 90%, respectively. After the successful initiation of DPR-SNED, enhanced intracellular carbons storage was achieved by phosphorus- and glycogen-accumulating organisms using the limited carbons in raw municipal wastewater to provide sufficient carbon sources for subsequent nutrient removal. In addition, the endogenous partial denitrification ensured the efficient nitrogen removal performance of the DPR-SNED system at low C/N conditions (average 4). © 2019, Science Press. All right reserved.

引用

页码：791 / 798

页数：7

共 19 条

[1] Strous M., Heijnen J.J., Kuenen J.G., Et al., The sequencing batch reactor as a powerful tool for the study of slowly growing anaerobic ammonium-oxidizing microorganisms, Applied Microbiology and Biotechnology, 50, 5, pp. 589-596, (1998)
[2] Zhou K.Q., Liu H., Sun Y.F., Et al., Change of microorganism amount and species in SBR reactor enriching denitrifying phosphate bacteria, Journal of Central South University (Science and Technology), 39, 4, pp. 705-711, (2008)
[3] Li G.Y., Operation characteristics and affecting factors of denitrifying phosphatation process fed with propionic, (2010)
[4] Lanham A.B., Moita R., Lemos P.C., Et al., Long-term operation of a reactor enriched in accumulibacter clade I DPAOs: performance with nitrate, nitrite and oxygen, Water Science and Technology, 63, 2, pp. 352-359, (2011)
[5] Zhang T., Liu Y., Fang H.H.P., Effect of pH change on the performance and microbial community of enhanced biological phosphate removal process, Biotechnology and Bioengineering, 92, 2, pp. 173-182, (2005)
[6] Zeng R.J., Lemaire R., Yuan Z.G., Et al., Simultaneous nitrification, denitrification, and phosphorus removal in a lab-scale sequencing batch reactor, Biotechnology and Bioengineering, 84, 2, pp. 170-178, (2003)
[7] Wang X.X., Wang S.Y., Xue T.L., Et al., Treating low carbon/nitrogen (C/N) wastewater in simultaneous nitrification-endogenous denitrification and phosphorous removal (SNDPR) systems by strengthening anaerobic intracellular carbon storage, Water Research, 77, pp. 191-200, (2015)
[8] Zhang J.H., Wang S.Y., Zhang M., Et al., Effect of conversion of internal carbon source on denitrifying phosphorus removal under different reaction time, China Environmental Science, 37, 3, pp. 989-997, (2017)
[9] Ye L.H., Li D., Zhang J., Et al., Advance of research on the technology of nitrite-denitrifying phosphorus removal, Journal of Beijing University of Technology, 42, 4, pp. 585-593, (2016)
[10] Zhang L.H., Zhuang Y.P., Wang X.M., Et al., Effect of temperature on denitrifying phosphorus removal efficiency using modified A <sup>2</sup> /O process , Transactions of the Chinese Society of Agricultural Engineering, 32, 10, pp. 213-219, (2016)

← 1 2 →