Comparative in-process study on enhanced nitrogen removal processes in biological reaction tank in Xi'an No.5 wastewater treatment plant
ZHANG Weiyao1,2,, YUAN Honglin2,,, LU Jinsuo2, WANG Bing3, SUN Hongfang3, LIU Xiaopeng3, MA Minghua3, LU Di3, SHI Xin3, LIU Xun4 1.Xi’an Water Group Co.Ltd, Xi’an 710061, China 2.School of Environment and Municipal Engineering, Xi’an University of Architecture and Technology, Xi’an 710054, China 3.Xi’an Sewage Treatment Co.Ltd, Xi’an 710024, China 4.School of Arts and Science, Shaanxi University of Science and Technology, Xi’an 710021, China
Abstract:To select an enhanced denitrification process in a biological reaction tank, the in-process experiments of biological reaction tank were carried out by using different series of AAO+MBBR processes, the five-stage multi-mode Bardenpho process and the original AAO processes in a urban sewage treatment plant. The experimental results show that compared with the original AAO process the AAO+MBBR process has similar effluent ammonia but low total nitrogen (0.49mg. L-1 lower) under the same working conditions, load and time and without adding any carbon source. Compared with the original AAO process, the Bardenpho process can stabilize the effluent ammonia nitrogen below 1.5 mg?L-1, and the total effluent nitrogen is reduced by 1.14mg?L-1. Without the additional of carbon source, the second anoxic zone shows an obvious secondary denitrification effect. Results in this study can provide reference for the selection of process routes for upgrading and reconstruction of urban sewage treatment plants. Key words:upgrade and reconstruction/ quasi-Class IV water quality standards/ moving bed biofilm reactor process/ bardenpho process/ enhanced nitrogen removal/ in-process experiments.
图7B系列Bardenpho生产性实验过程样$ {\bf{N}}{{\bf{O}}^ -_3} $-N的质量浓度 Figure7.$ {\rm{N}}{{\rm{O}}^ - _3}$N Process samples of B series Bardenpho production experiments
表1MBBR实验进水水质指标 Table1.Influent quality of the MBBR experiment mg·L?1
采样日期
COD
NH3-N
TN
$ {\rm{P}}{{\rm{O}}^{3 - }_4}\text{-P}$
2018-06-24
370
36.35
54.8
4.66
2018-06-25
609
39.55
60.8
3.42
2018-06-26
555
42.88
55.6
4.34
2018-06-27
455
31.22
55.5
4.76
2018-07-19
369
32.76
42.5
4.30
2018-07-24
551
40.06
54.1
7.87
2018-08-26
250
33.27
43.9
4.38
2018-09-23
438
37.49
47.9
5.06
2018-10-17
562
35.01
41.9
4.20
2018-10-18
757
27.72
72.7
7.80
2018-10-19
761
29.88
54.5
6.50
平均值
516.09
35.11
53.11
5.21
采样日期
COD
NH3-N
TN
$ {\rm{P}}{{\rm{O}}^{3 - }_4}\text{-P}$
2018-06-24
370
36.35
54.8
4.66
2018-06-25
609
39.55
60.8
3.42
2018-06-26
555
42.88
55.6
4.34
2018-06-27
455
31.22
55.5
4.76
2018-07-19
369
32.76
42.5
4.30
2018-07-24
551
40.06
54.1
7.87
2018-08-26
250
33.27
43.9
4.38
2018-09-23
438
37.49
47.9
5.06
2018-10-17
562
35.01
41.9
4.20
2018-10-18
757
27.72
72.7
7.80
2018-10-19
761
29.88
54.5
6.50
平均值
516.09
35.11
53.11
5.21
下载: 导出CSV 表2MBBR实验出水水质指标 Table2.Comparison of effluent quality of the MBBR experiment of A and B series mg·L?1
取样日期
A系列
B系列
COD
NH3-N
TN
$ {\rm{P}}{{\rm{O}}^{3 - }_4}\text{-P}$
COD
NH3-N
TN
$ {\rm{P}}{{\rm{O}}^{3 - }_4}\text{-P}$
2018-06-24
18
0.847
7.505
1.75
19
0.708
3.450
0.600
2018-06-25
16
1.35
2.758
1.10
17
0.431
4.711
0.430
2018-06-26
21
0.458
5.991
1.25
22
0.347
5.380
0.890
2018-06-27
20
0.347
5.964
3.03
21
0.722
9.172
2.02
2018-07-19
21
0.236
3.394
1.65
19
0.458
5.616
1.71
2018-07-24
18
0.747
8.447
2.48
17
0.347
7.047
0.090
2018-08-26
18
0.458
10.958
4.08
18
0.458
4.825
1.13
2018-09-23
21
0.553
2.973
0.219
27
0.220
8.070
0.108
2018-10-17
15
0.980
6.988
0.044
15
0.520
7.916
0.137
2018-10-18
24
0.270
6.727
0.209
27
0.270
5.788
0.034
2018-10-19
22
1.97
8.06
0.310
22
3.46
13.18
0.024
平均值
19.45
0.747
6.342
1.466
20.36
0.722
6.832
0.652
取样日期
A系列
B系列
COD
NH3-N
TN
$ {\rm{P}}{{\rm{O}}^{3 - }_4}\text{-P}$
COD
NH3-N
TN
$ {\rm{P}}{{\rm{O}}^{3 - }_4}\text{-P}$
2018-06-24
18
0.847
7.505
1.75
19
0.708
3.450
0.600
2018-06-25
16
1.35
2.758
1.10
17
0.431
4.711
0.430
2018-06-26
21
0.458
5.991
1.25
22
0.347
5.380
0.890
2018-06-27
20
0.347
5.964
3.03
21
0.722
9.172
2.02
2018-07-19
21
0.236
3.394
1.65
19
0.458
5.616
1.71
2018-07-24
18
0.747
8.447
2.48
17
0.347
7.047
0.090
2018-08-26
18
0.458
10.958
4.08
18
0.458
4.825
1.13
2018-09-23
21
0.553
2.973
0.219
27
0.220
8.070
0.108
2018-10-17
15
0.980
6.988
0.044
15
0.520
7.916
0.137
2018-10-18
24
0.270
6.727
0.209
27
0.270
5.788
0.034
2018-10-19
22
1.97
8.06
0.310
22
3.46
13.18
0.024
平均值
19.45
0.747
6.342
1.466
20.36
0.722
6.832
0.652
下载: 导出CSV 表3Bardenpho实验进水水质 Table3.Influent quality of the Bardenpho experimental mg·L?1
取样日期
COD
NH3-N
TN
$ {\rm{P}}{{\rm{O}}^{3 - }_4}\text{-P}$
2019-11-19
387
40.42
48.0
6.37
2019-11-20
372
42.00
47.1
8.52
2019-11-21
399
57.79
67.9
10.9
2019-11-26
466
43.58
56.3
5.38
2019-11-27
477
42.79
54.2
9.99
2019-11-28
823
33.97
48.4
7.53
2019-12-05
259
40.55
50.9
5.61
2019-12-17
323
40.82
49.2
6.77
2019-12-20
253
45.55
55.3
5.21
平均值
417.7
43.05
53.03
7.36
取样日期
COD
NH3-N
TN
$ {\rm{P}}{{\rm{O}}^{3 - }_4}\text{-P}$
2019-11-19
387
40.42
48.0
6.37
2019-11-20
372
42.00
47.1
8.52
2019-11-21
399
57.79
67.9
10.9
2019-11-26
466
43.58
56.3
5.38
2019-11-27
477
42.79
54.2
9.99
2019-11-28
823
33.97
48.4
7.53
2019-12-05
259
40.55
50.9
5.61
2019-12-17
323
40.82
49.2
6.77
2019-12-20
253
45.55
55.3
5.21
平均值
417.7
43.05
53.03
7.36
下载: 导出CSV 表5Bardenpho生产性实验中各好氧区末端的DO Table5.Measured values of dissolved oxygen at the end of aerobic zone of the Bardenpho production experiment mg·L?1
采样日期
B系列一段好氧区
B系列二段好氧区
C好氧区
D好氧区
2019-11-19
0.900
0.370
3.615
2.315
2019-11-20
0.710
2.020
3.595
2.985
2019-11-21
3.240
1.930
4.275
2.895
2019-11-26
1.180
1.100
3.725
1.560
2019-11-27
0.720
0.280
3.935
4.360
2019-11-28
1.200
0.420
4.390
2.720
2019-12-05
2.190
0.180
3.255
1.420
2019-12-17
—
—
4.190
1.940
2019-12-20
1.960
0.130
3.770
2.275
采样日期
B系列一段好氧区
B系列二段好氧区
C好氧区
D好氧区
2019-11-19
0.900
0.370
3.615
2.315
2019-11-20
0.710
2.020
3.595
2.985
2019-11-21
3.240
1.930
4.275
2.895
2019-11-26
1.180
1.100
3.725
1.560
2019-11-27
0.720
0.280
3.935
4.360
2019-11-28
1.200
0.420
4.390
2.720
2019-12-05
2.190
0.180
3.255
1.420
2019-12-17
—
—
4.190
1.940
2019-12-20
1.960
0.130
3.770
2.275
下载: 导出CSV 表6Bardenpho生产性实验C、D系列相关参数 Table6.Experimental parameters of C and D series Bardenpho in-process experiments
采样日期
进水温度/℃
VN/m3
进水TN/(mg·L?1)
出水TN/(mg·L?1)
△Xv/(kg·d?1)
VSS比例
X/(g·L?1)
Kde/(kg·(kg·d)?1)
2019-11-19
19.9
23 041
48
7.00
2 413
0.5
5 458
0.021
2019-11-20
19.9
23 041
47.1
6.85
2 445
0.5
5 885
0.019
2019-11-21
19.5
23 041
67.9
7.45
2 493
0.5
6 090
0.032
2019-11-26
18.9
23 041
56.3
6.27
1 972
0.5
6 445
0.026
2019-11-27
18.8
23 041
54.2
7.69
2 774
0.5
6 465
0.020
2019-11-28
18.8
23 041
48.4
6.61
3 593
0.5
6 380
0.014
2019-12-05
18.4
23 041
50.9
5.28
3 748
0.5
6 190
0.016
2019-12-17
18.1
23 041
49.2
5.19
1 963
0.5
6 140
0.023
2019-12-20
18.0
23 041
55.3
7.21
1 990
0.5
5 920
0.027
采样日期
进水温度/℃
VN/m3
进水TN/(mg·L?1)
出水TN/(mg·L?1)
△Xv/(kg·d?1)
VSS比例
X/(g·L?1)
Kde/(kg·(kg·d)?1)
2019-11-19
19.9
23 041
48
7.00
2 413
0.5
5 458
0.021
2019-11-20
19.9
23 041
47.1
6.85
2 445
0.5
5 885
0.019
2019-11-21
19.5
23 041
67.9
7.45
2 493
0.5
6 090
0.032
2019-11-26
18.9
23 041
56.3
6.27
1 972
0.5
6 445
0.026
2019-11-27
18.8
23 041
54.2
7.69
2 774
0.5
6 465
0.020
2019-11-28
18.8
23 041
48.4
6.61
3 593
0.5
6 380
0.014
2019-12-05
18.4
23 041
50.9
5.28
3 748
0.5
6 190
0.016
2019-12-17
18.1
23 041
49.2
5.19
1 963
0.5
6 140
0.023
2019-12-20
18.0
23 041
55.3
7.21
1 990
0.5
5 920
0.027
下载: 导出CSV 表4Bardenpho实验出水水质情况对比表 Table4.Comparison of effluent quality of Bardenpho experiment mg·L?1
取样日期
B系列
C、D系列
COD
NH3-N
TN
$ {\rm{P}}{{\rm{O}}^{3 - }_4}\text{-P}$
COD
NH3-N
TN
$ {\rm{P}}{{\rm{O}}^{3 - }_4}\text{-P}$
2019-11-19
14
0.137
3.56
0.084
16
0.111
7.00
0.132
2019-11-20
21
0.768
4.55
0.044
33
0.400
6.85
0.132
2019-11-21
16
0.347
4.47
0.264
17
0.268
7.45
0.100
2019-11-26
22
1.321
5.75
0.070
19
0.821
6.27
0.132
2019-11-27
21
0.584
5.49
0.120
20
0.295
7.69
0.153
2019-11-28
25
1.421
7.34
0.264
15
0.216
6.61
0.111
2019-12-05
19
0.611
3.90
0.224
21
0.716
5.28
0.163
2019-12-17
19
0.216
6.93
0.064
20
0.295
5.19
0.163
2019-12-20
15
1.350
7.30
0.244
22
0.189
7.21
0.163
平均值
19.11
0.751
5.477
0.153
20.33
0.368
6.617
0.139
最大值
25
1.421
7.340
0.264
33
0.821
7.690
0.163
最小值
15
0.216
3.900
0.044
15
0.189
5.190
0.100
取样日期
B系列
C、D系列
COD
NH3-N
TN
$ {\rm{P}}{{\rm{O}}^{3 - }_4}\text{-P}$
COD
NH3-N
TN
$ {\rm{P}}{{\rm{O}}^{3 - }_4}\text{-P}$
2019-11-19
14
0.137
3.56
0.084
16
0.111
7.00
0.132
2019-11-20
21
0.768
4.55
0.044
33
0.400
6.85
0.132
2019-11-21
16
0.347
4.47
0.264
17
0.268
7.45
0.100
2019-11-26
22
1.321
5.75
0.070
19
0.821
6.27
0.132
2019-11-27
21
0.584
5.49
0.120
20
0.295
7.69
0.153
2019-11-28
25
1.421
7.34
0.264
15
0.216
6.61
0.111
2019-12-05
19
0.611
3.90
0.224
21
0.716
5.28
0.163
2019-12-17
19
0.216
6.93
0.064
20
0.295
5.19
0.163
2019-12-20
15
1.350
7.30
0.244
22
0.189
7.21
0.163
平均值
19.11
0.751
5.477
0.153
20.33
0.368
6.617
0.139
最大值
25
1.421
7.340
0.264
33
0.821
7.690
0.163
最小值
15
0.216
3.900
0.044
15
0.189
5.190
0.100
下载: 导出CSV 表7Bardenpho实验B系列相关参数 Table7.Experimental parameters of B series Bardenpho in-process experiments
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YANG X P, WANG S M, ZHANG D W, et al. Isolation and nitrogen removal characteristics of an aerobic heterotrophic nitrifying-denitrifying bacterium, Bacillus subtilis A1[J]. Bioresource Technology, 2011, 102(2): 854-862. doi: 10.1016/j.biortech.2010.09.007
1.Xi’an Water Group Co.Ltd, Xi’an 710061, China 2.School of Environment and Municipal Engineering, Xi’an University of Architecture and Technology, Xi’an 710054, China 3.Xi’an Sewage Treatment Co.Ltd, Xi’an 710024, China 4.School of Arts and Science, Shaanxi University of Science and Technology, Xi’an 710021, China Available Online: 2021-09-23 Keywords:upgrade and reconstruction/ quasi-Class IV water quality standards/ moving bed biofilm reactor process/ bardenpho process/ enhanced nitrogen removal/ in-process experiments Abstract:To select an enhanced denitrification process in a biological reaction tank, the in-process experiments of biological reaction tank were carried out by using different series of AAO+MBBR processes, the five-stage multi-mode Bardenpho process and the original AAO processes in a urban sewage treatment plant. The experimental results show that compared with the original AAO process the AAO+MBBR process has similar effluent ammonia but low total nitrogen (0.49mg. L-1 lower) under the same working conditions, load and time and without adding any carbon source. Compared with the original AAO process, the Bardenpho process can stabilize the effluent ammonia nitrogen below 1.5 mg?L-1, and the total effluent nitrogen is reduced by 1.14mg?L-1. Without the additional of carbon source, the second anoxic zone shows an obvious secondary denitrification effect. Results in this study can provide reference for the selection of process routes for upgrading and reconstruction of urban sewage treatment plants.
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