Month | UASB reactor effluent concentration (mean ± SD) | CW1 effluent concentration (mean ± SD) | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
TSS | COD | TN | NH4–N | TP | PO43− | TSS | COD | TN | NH4–N | TP | PO43− | |
Jan | 274.4 ± 12 | 614 ± 5.3 | 101.4 ± 3 | 74.8 ± 2.2 | 32.5 ± 2.4 | 25 ± 1.4 | 116.4 ± 6 (57.6) | 199 ± 3 (67.6) | 51.5 ± 5.6 (49.2) | 28.3 ± 2.5 (62.2) | 18.1 ± 1.1 (44.3) | 11.3 ± 2.4 (54.8) |
Feb | 263.7 ± 5.4 | 545.7 ± 10 | 77.4 ± 2.2 | 51.2 ± 1.8 | 28.4 ± 1 | 20.6 ± 0.4 | 88.8 ± 3.9 (66.3) | 161.9 ± 5.8 (70.3) | 35.9 ± 6.3 (53.9) | 21.1 ± 2.2 (58.8) | 14.7 ± 0.4 (48.2) | 8.7 ± 0.8 (57.8) |
Mar | 180.2 ± 1.2 | 338.7 ± 10 | 43.6 ± 3.2 | 30.3 ± 0.8 | 25.4 ± 2.4 | 17.3 ± 0.9 | 51 ± 7.1 (71.7) | 73.3 ± 6 (78.4) | 18.3 ± 1.3 (58) | 9.6 ± 0.5 (68.3) | 12.5 ± 1.2 (51.6) | 6.8 ± 0.2 (60.7) |
Apr | 256 ± 2 | 443.7 ± 5.9 | 38 ± 1.2 | 23.1 ± 2.4 | 33.4 ± 2.9 | 27.5 ± 1.2 | 97 ± 4.2 (62.1) | 114.2 ± 7.5 (74.3) | 15.1 ± 1.3 (60.3) | 6.4 ± 1.2 (72.3) | 19.9 ± 2.1 (40.4) | 13.2 ± 1.5 (52) |
May | 210.9 ± 6.8 | 278.2 ± 18 | 57 ± 3.9 | 34.7 ± 2.5 | 42.9 ± 2.9 | 29.9 ± 1.6 | 53.2 ± 5.4 (74.8) | 57.6 ± 8.4 (79.3) | 26.3 ± 1.1 (53.9) | 13.4 ± 2 (61.4) | 30 ± 1.7 (30.1) | 16.7 ± 2.4(44.1) |
Jun | 212 ± 12 | 350.2 ± 16 | 63.3 ± 2.1 | 44.2 ± 2.3 | 27.7 ± 2.1 | 20.1 ± 1.6 | 61 ± 3.4 (71.2) | 89.3 ± 2.4 (74.5) | 28.9 ± 2.1 (54.3) | 17.4 ± 3.1 (60.6) | 15.2 ± 1.7 (45.1) | 10.5 ± 0.7 (47.8) |
Jul | 184.3 ± 5.1 | 207.3 ± 3.1 | 29.4 ± 1 | 20.3 ± 1.6 | 24.4 ± 3.4 | 14.4 ± 1 | 31.3 ± 1.1 (83) | 30.3 ± 3.7 (85.4) | 13.2 ± 4.5 (55.1) | 3.4 ± 0.1(83.3) | 12.6 ± 0.9(48.4) | 7 ± 0.4 (51.8) |
Aug | 123.7 ± 5.1 | 334.5 ± 0.5 | 25 ± 1.9 | 17.3 ± 1.6 | 17.9 ± 3.1 | 10.2 ± 0.3 | 35.6 ± 2.7 (71.2) | 69.6 ± 2.2 (79.2) | 11 ± 1.1 (56) | 2.9 ± 0.2 (83.2) | 10.5 ± 1 (41.3) | 5.6 ± 0.9 (45.1) |
Sept | 239.3 ± 6.1 | 383.3 ± 9.9 | 32.8 ± 1.8 | 21.7 ± 2 | 41.7 ± 2 | 32.9 ± 1.4 | 93.4 ± 5.8 (61) | 108.4 ± 2.6 (71.7) | 14.1 ± 2.1 (57) | 5 ± 1.1(77) | 28.5 ± 5(31.7) | 19.4 ± 0.9 (41) |
Oct | 211.4 ± 2.1 | 436 ± 2 | 48.6 ± 7.2 | 35.7 ± 3 | 23.2 ± 1 | 19.6 ± 1.3 | 66 ± 9 (68.8) | 127.4 ± 7.2 (70.7) | 21.2 ± 4.2 (56.4) | 14.2 ± 1.8 (60.2) | 14.8 ± 0.8 (36.2) | 10.9 ± 1.3 (44.4) |
Nov | 177.4 ± 12 | 313 ± 2.6 | 34.9 ± 4.6 | 24.9 ± 3.9 | 20.3 ± 2.2 | 12.6 ± 0.3 | 34.8 ± 2.5 (69.2) | 92.3 ± 3.3 (70.5) | 13.4 ± 0.6 (61.6) | 7.2 ± 1.1 (71.1) | 11.6 ± 0.4 (42.9) | 7.2 ± 0.5 (44.2) |
Dec | 200.9 ± 7.4 | 392.7 ± 3.5 | 61.3 ± 2.1 | 45.3 ± 4.5 | 29.4 ± 1.6 | 22.6 ± 1.3 | 69.5 ± 1.7 (65.4) | 122.4 ± 9.1 (68.8) | 29.2 ± 2.5 (52.4) | 16.2 ± 2.5 (64.2) | 19.7 ± 0.8 (33) | 14.7 ± 1.3 (34.4) |
p-value |  < 0.05 |  < 0.05 |  < 0.05 |  < 0.05 |  < 0.05 |  < 0.05 |  < 0.05 |  < 0.05 |  < 0.05 |  < 0.05 |  < 0.05 |  < 0.05 |
Month | CW2 effluent concentration (mean ± SD) | |||||
---|---|---|---|---|---|---|
TSS | COD | TN | NH4–N | TP | PO43− | |
Jan | 50.5 ± 0.5 (56.6) | 64.1 ± 7.2 (67.8) | 21 ± 1.8 (59.2) | 9.1 ± 0.9 (67.8) | 4.9 ± 0.5 (72.9) | 3 ± 0.6 (73.5) |
Feb | 35.8 ± 1.8 (59.7) | 51 ± 5 (68.5) | 14.8 ± 2.2 (58.8) | 5.4 ± 0.7 (74.4) | 5 ± 0.4 (66) | 2.8 ± 0.6 (67.8) |
Mar | 16.8 ± 2.6 (67.1) | 17.4 ± 4 (76.3) | 6.8 ± 1 (62.8) | 1.8 ± 0.3 (81.3) | 4.7 ± 0.7 (62.4) | 1.9 ± 0.1 (72.1) |
Apr | 36.9 ± 2 (62) | 43.9 ± 3.3 (61.6) | 5.3 ± 0.6 (64.9) | 1.1 ± 0.1 (82.8) | 4.8 ± 0.9 (75.9) | 3.2 ± 0.9 (76.4) |
May | 13.9 ± 2.7 (73.9) | 14 ± 3.4 (75.7) | 11.2 ± 1.1 (57.4) | 3.1 ± 0.8 (76.9) | 14.3 ± 1.2 (52.3) | 7.4 ± 1 (55.7) |
Jun | 18 ± 0.9 (70.5) | 29.6 ± 1.5 (66.9) | 11.9 ± 1.1 (58.8) | 4 ± 1.3 (77) | 4.3 ± 0.8 (71.7) | 2.9 ± 0.5 (72.4) |
Jul | 5.3 ± 0.3 (83.1) | 7.4 ± 1.3 (75.6) | 3.4 ± 0.3 (74.2) | 0.9 ± 0.1 (73.5) | 2.5 ± 0.9 (80.2) | 1.2 ± 0.1 (82.9) |
Aug | 10.4 ± 0.4 (70.8) | 15.2 ± 4.7 (78.2) | 2.8 ± 0.3 (74.5) | 0.7 ± 0.1 (75.9) | 2.7 ± 0.3 (74.3) | 1.4 ± 0.05 (75) |
Sept | 37.5 ± 3.3 (59.9) | 38.2 ± 2.5 (64.8) | 5.6 ± 0.6 (60.3) | 0.8 ± 0.1 (84) | 16.3 ± 3.9 (42.8) | 9.6 ± 0.3 (50.5) |
Oct | 22.8 ± 1.9 (65.5) | 42.8 ± 1.1 (66.5) | 7.4 ± 3 (65.1) | 3.2 ± 1 (77.5) | 9.4 ± 1.6 (36.5) | 5.7 ± 0.2 (47.7) |
Nov | 18.8 ± 1.3 (65.7) | 29.7 ± 3.4 (67.8) | 4.8 ± 0.9 (64.2) | 1.2 ± 0.9 (83.3) | 8.7 ± 0.6 (25) | 4.8 ± 0.2 (41.5) |
Dec | 25 ± 1.9 (64) | 39.2 ± 3.4 (68) | 12.3 ± 1.3 (57.9) | 3.7 ± 1.5 (77.2) | 13.3 ± 2.4 (32.5) | 9.3 ± 0.9 (36.7) |
p-value |  < 0.05 |  < 0.05 |  < 0.05 |  < 0.05 |  < 0.05 |  < 0.05 |
EEPA* |  < 50 |  < 250 |  < 40 |  < 20 |  |  < 5 |