Table 3. Analytical instruments and apparatus used during the study.
| S. No | Parameters | Analytical Instrument | Model |
|---|---|---|---|
| 1. | Chemical Oxygen Demand (COD) | COD Reactor | Velp ECO 25 |
| 2. | Total Kjeldahl Nitrogen (TKN) | Semi-Automatic Kjeldahl Distillation System | KDN |
| 3. | Ammonium nitrogen (NH4+-N) | UV Visible Spectrophotometer & Portable Spectrophotometer |
PG-Motel T 60 Hitachi U2800 |
| 4. | Ortho-Phosphate-Phosphorous (o-PO4-3-P) |
UV Visible Spectrophotometer Portable Spectrophotometer |
Hitachi U2800 |
| 5. | Total Phosphorous (TP) | UV Visible Spectrophotometer |
Hitachi U2800 PG-Motel T 60 |
| 6. | pH | pH meter | Hanna HI 8520 Eutech pH 700 WTW 720 |
| 7. | Duckweed Mass | Analytical Balance | Adam AAA 160 LE Adventure AR 3130 Phoenix, BTG-303 |
| 8. | Duckweed Drying | Oven | WTC Blinder LDO-030 N |
| 9. | Duckweed growth under controlled conditions | Growth Chamber | Chasewood, Environmental USA |