Start-up and Stable Operation of CANON Coupled with Denitrifying Phosphorus Removal

被引：1

作者：

Yin W. ^{[1
]}

Chen Y. ^{[1
]}

Zhang Y. ^{[1
]}

Xu L.-Z. ^{[1
,2
,3
]}

Wu P. ^{[1
,2
,3
]}

Liu W.-R. ^{[1
,2
,3
]}

机构：

[1] School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou

[2] National Regional Engineering Laboratory of Urban Domestic Wastewater Resources Utilization Technology, Suzhou

[3] Jiangsu High Education Collaborative Innovation Center of Water Treatment Technology and Material, Suzhou

来源：

Huanjing Kexue/Environmental Science | 2019年 / 40卷 / 11期

关键词：

Completely autotrophic nitrogen removal over nitrite (CANON); Coupling; Denitrifying phosphorus removal; Nitrogen and phosphorus removal; Start-up;

D O I：

10.13227/j.hjkx.201904138

中图分类号：

学科分类号：

摘要：

A process coupled completely autotrophic nitrogen removal over nitrite (CANON)with denitrifying phosphorus removal in a modified anaerobic baffled reactor (ABR) coupled with a membrane bioreactor (MBR), inoculated with ordinary activated sludge, was proposed for treating artificial wastewater with ammonia 200 mg•L-1 and COD/TN=1. This experiment studied the start-up of the process and its nitrogen and phosphorus removal efficiency by controlling the recycle ratio and increasing it from 50% to 200% step by step, with a temperature of (25±1)℃ and pH of 7.5±0.2. The results showed that the anaerobic part in the ABR consumed 70% COD, and resulted in a quick start-up of partial-nitrification at 21 d under low DO and high ammonia nitrogen. Then, by controlling the intermittent aeration (exposure stop ratio: 2 h:2 h, DO 0.3-0.4 mg•L-1), the start-up of the CANON part in the coupling process was successfully achieved at 132 d, such that the concentration of nitrates in the electron acceptor of the ABR anoxic section increased steadily, and finally the coupling process started successfully at 160 d. With stable operation, the TN removal load in the MBR reached 0.22 kg•(m3•d)-1, and the average removal efficiency of COD, TN, and PO4 3--P was 87.0%, 90.4%, and 81.8%, respectively. The batch experiment estimated that the denitrifying phosphate accumulating organisms (DPAOs) using nitrates as electron acceptors in the ABR accounted for 68% of the phosphate accumulating organisms (PAOs). The DPAOs, ammonia-oxidizing bacteria (AOB), and anaerobic ammonium oxidizing bacteria (AnAOB) have been developed in the system and have good simultaneous nitrogen and phosphorus removal efficiency. © 2019, Science Press. All right reserved.

引用

页码：5032 / 5039

页数：7

共 29 条

[1]

Sliekers A.O., Derwort N., Gomez J.L.C., Et al., Completely autotrophic nitrogen removal over nitrite in one single reactor, Water Research, 36, 10, pp. 2475-2482, (2002)

[2]

Cai Q., Zhang D.J., Ding J.J., The cultivation of completely autotrophic nitrogen removal over nitrite granular sludge and the recovery and enhancement of nitrogen removal, China Environmental Science, 34, 11, pp. 2805-2812, (2014)

[3]

Xiu Y., Yu G.P., Liu Z.H., Et al., Start-up of the completely autotrophic nitrogen removal over nitrite process with a submerged aerated biological filter and the effect of inorganic carbon on nitrogen removal and microbial activity, Bioresource Technology, 254, pp. 347-352, (2018)

[4]

Zhao J., Wang X.X., Li X.Y., Et al., Advanced nutrient removal from ammonia and domestic wastewaters by a novel process based on simultaneous partial nitrification-anammox and modified denitrifying phosphorus removal, Chemical Engineering Journal, 354, pp. 589-598, (2018)

[5]

Zhang Y., Wang Y.Y., Yan Y., Et al., Characterization of CANON reactor performance and microbial community shifts with elevated COD/N ratios under a continuous aeration mode, Frontiers of Environmental Science & Engineering, 13, 1, (2018)

[6]

Liu T., Li D., Zeng H.P., Et al., Biodiversity and quantification of functional bacteria in completely autotrophic nitrogen-removal over nitrite (CANON) process, Bioresource Technology, 118, pp. 399-406, (2012)

[7]

Li D., Chen G.Y., Zeng H.P., Et al., Start-up and denitrification performance analysis of CANON process in a continuous flow reactor, Journal of Harbin Institute of Technology, 49, 10, pp. 182-188, (2017)

[8]

Carvalho G., Lemos P.C., Oehmen A., Et al., Denitrifying phosphorus removal: linking the process performance with the microbial community structure, Water Research, 41, 19, pp. 4383-4396, (2007)

[9]

Wang A.J., Wu L.H., Ren N.Q., Et al., Feasibility of denitrifying phosphorus removal technique using nitrite as electron acceptor, China Environmental Science, 25, 5, pp. 515-518, (2005)

[10]

Liu J.G., Fu K.M., Yang Y.F., Et al., Effect of electron acceptors on anoxic phosphorus uptake of DPB, Environmental Science, 28, 7, pp. 1472-1476, (2007)

← 1 2 3 →