Figure 1.
Internal circulation reactor[12]
Table 1.
| Wastewater | Company | COD(mg/l) | COD load (kgCOD/m3.d) | Removal rate (%) |
|---|---|---|---|---|
| Brewery | Harbin brewing (Shenyang) Co.,Ltd | 2000–2800 | - | 80 |
| Sweet potato starch | in Zhengzhou | 10865 | 21.9 | 84 |
| Pulp and paper | Fujian Nanping Paper | - | 12-15 | 65 |
| YueYang Paper Co.,Ltd and Gaungxi Bossco Environment protection Technology Co.,Ltd | - | 20-26 | > 75 |
Table 2.
BIOPAQ@ICX performance of Allard Emballages, France and Hamburger, Hungary compared to UASB average performance[15]
| Treatment specification of BIOPAQ@ICX | UASB average performance | |||
|---|---|---|---|---|
| Country | France | Hungary | Country | UK |
| COD load (kgCOD/m3.day) | 6000–7000 | 7000 | COD load (kgCOD/m3.day) | 0.8–5.68 |
| Flow rate (m3/h) | 70–80 | 400–500 | Flow rate (m3/h) | 46–326 |
| Biogas produce (m3/day) | 2400–3000 | 15000 – 25000 | Biogas produce (Nm3/day) | 439–5992 |
| Biogas quality (% CH4) | 70 | - | Biogas quality (% CH4) | 43.7–69.1 |
| Removal rate (%) | 80–90 | 74–90 | Removal rate (%) | 70–80 |
Figure 2.
VFA and COD removal rate correlation[14]
Table 3.
Saigon Paper mill IC reactor operating design
| IC volume (m3) | Diameter (m) | Height (m) | HRT (h) | v (m/h) | VLR (kgCOD/m3.d) | Sludge volume (m3) |
| 1395 | 9.5 | 20 | 4 | 45 m/h | 6–14 | 650–750 |
Figure 3.
Saigon Paper mill IC reactor
Figure 4.
Effect of COD concentration on COD removal
Table 4.
Saigon Paper mill IC reactor influent and effluent tests result
| Parameters | Unit | Value | *QCVN12:2015/BTNMT | |
| Influent | Effluent | |||
| pH | - | 5.9–6.5 | 6.9–7.1 | 5.5–9 |
| TSS | mg/l | 250–400 | 200–450 | 100 |
| COD | mg/l | 1500–2500 | 300–600 | 150 |
| Alkalinity | mg/l | 250–400 | 851–1000 | - |
| VFA | mg/l | 420–630 | 85–110 | - |
| N-NH4 | mg/l | 20–30 | 20–30 | - |
| P-PO4 | mg/l | 4–6 | 7–9 | - |
| Ca2+ | mg/l | 300–350 | - | - |
| SO4 2- | mg/l | 50–100 | 1–5 | - |
Figure 5.
Saigon Paper mill IC reactor Imhoff test results