Table 4.
Total solids, suspended solids, nitrite, orthophosphate, dissolved oxygen, and pH of water in aquatic ponds and hydroponic system.
| Pond number | Total solids (mg/L) | Suspended solids (mg/L) | Nitrite (mg/L) | Orthophosphate (mg/L) | Dissolved oxygen (mg/L) | pH |
|---|---|---|---|---|---|---|
| 7th day | ||||||
| 1 | 162 | 94 | 1.2083 | 0.2347 | 5.34 | 6.542 |
| 2 | 150 | 80 | 0.9439 | 0.2234 | 6.35 | 6.568 |
| 3 | 132 | 54 | 0.1613 | 0.1435 | 6.41 | 6.983 |
|
| ||||||
| 17th day | ||||||
| 1 | 204 | 172 | 2.1611 | 0.3253 | 5.73 | 6.573 |
| 2 | 83 | 96 | 1.1123 | 0.2023 | 6.65 | 6.751 |
| 3 | 56 | 43 | 0.1216 | 0.1364 | 7.34 | 7.163 |
|
| ||||||
| 27th day | ||||||
| 1 | 290 | 228 | 3.6583 | 0.3425 | 5.54 | 6.625 |
| 2 | 72 | 64 | 2.8732 | 0.1958 | 6.52 | 6.356 |
| 3 | 42 | 34 | 0.1486 | 0.1743 | 7.31 | 6.923 |
|
| ||||||
| 37th day | ||||||
| 1 | 328 | 280 | 3.0708 | 0.4173 | 5.38 | 6.831 |
| 2 | 60 | 47 | 1.6521 | 0.2042 | 6.75 | 6.259 |
| 3 | 36 | 25 | 0.1209 | 0.1725 | 6.40 | 7.038 |
|
| ||||||
| 47th day | ||||||
| 1 | 373 | 302 | 3.1937 | 0.4264 | 5.30 | 6.878 |
| 2 | 43 | 32 | 1.6190 | 0.2273 | 6.78 | 7.078 |
| 3 | 35 | 28 | 0.1641 | 0.1755 | 7.40 | 7.048 |
Pond number 1 = aquatic pond, pond number 2 = aquatic pond connect to hydroponic system without rice husk biochar, and pond number 3 = aquatic pond connect to planting panel with rice husk biochar.