Table 3 Table of determination method
Serial number | Index | Measurement method/calculation method | Detection limits/unit | Chinese national standard |
|---|---|---|---|---|
1 | COD (chemical oxygen demand) | Dicolorityte method | 10Â mg/L | GB11914-89 |
2 | Ammonium nitrogen (NH3-N) | Salicylic acid spectrophotometry | 0.01Â mg/L | GB7481-87 |
3 | Total phosphorus (TP) | Ammonium molybdate spectrophotometric method | 0.01Â mg/L | GB11893-89 |
4 | Total nitrogen (TN) | Alkaline potassium persulfate digestion UV spectrophotometric method | 0.05Â mg/L | GB11894-89 |
5 | Colority | Dilution multiple method | Dimensionless | GB11903-89 |
6 | Unit product water consumption | Water consumption/output of qualified products | m3/t | Empirical calculation method |
7 | Unit product wastewater discharge | Wastewater discharge/output of qualified products | m3/t | Empirical calculation method |
8 | Wastewater treatment cost per ton | Wastewater treatment cost/Wastewater discharge | RMB/t | Empirical calculation method |
9 | Operating load of sewage treatment | Actual wastewater treatment quantity/designed wastewater treatment quantity | m3/m3 | Empirical calculation method |
10 | Recycling rate of industrial water | Repeated utilization of water quantity/(fresh water supplement + repeated utilization of water quantity) | % | Empirical calculation method |
11 | Reuse rate of tail water | Reuse quantity of tail water/water consumption | % | Empirical calculation method |
12 | Stability compliance rate of wastewater treatment | Stability compliance number/total monitoring number | % | Empirical calculation method |