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The Water Using Process and Wastewater Recycling Effectiveness of Thermal Power Plants
All TPC thermal power plants have general wastewater treatment systems. We will also ensure by monitoring that wastewater discharge is compliant with the Effluent Standards. Otherwise, we do our best to recycle wastewater in order to enhance water usage efficiency.
Before setting up the discharge facilities, the best discharge method is determined by numerical simulation and hydraulic model tests, in order to reduce the impact of thermal effluent on marine ecology.
| Power Plant |
Water Source | Effluent of Treated Wastewater (tons) | Reuse of wastewater (tons) |
Recovery (％) |
|---|---|---|---|---|
| Hsiehho | tap water | 37,101 | 30,376 | 81.87% |
| Linkou | tap water well water |
667,899 | 527,761 | 79.02% |
| Tatan | tap water | 616,635 | 511,848 | 83.01% |
| Tunghsiao | tap water | 274,952 | 207,685 | 75.54% |
| Taichung | tap water | 856,125 | 856,125 | 100.00% |
| Hsinta | tap water | 330,007 | 155,344 | 47.07% |
| Talin | tap water | 462,095 | 356,267 | 77.10% |
| Nanpu | tap water | 80,560 | 56,938 | 70.68% |
| Chienshan | tap water | 7,582 | 7,582 | 100.00% |
| Tashan | tap water | 5,482 | 1,693 | 30.88% |
| total | 3,338,438 | 2,711,619 | 81.22% |
Note: The industrial wastewater had excessive salt concentration from the flue gas desulfurization process (FGD). This wastewater was unusable because it could cause serious corrosion and salination of the soil, therefore, it was not counted in the total wastewater.
Monitoring the Quality of Effluent from Thermal Power Plants
The annual average value of effluent water monitoring of each thermal power plant in 2025, including the content of hydrogen ion concentration index(PH), suspended solids(SS), and chemical oxygen demand(COD), etc. The monitoring results all meet the Effluent Standards, as shown in the table below.
| Power Plant |
Water Discharge (tons/day) |
pH | Suspended Solids (SS) (mg/L) |
Chemical Oxygen Demand (COD) (mg/L) |
Biochemical Oxygen Demand (BOD) (mg/L) |
|---|---|---|---|---|---|
| Hsiehho | 16 | 7.5 | 18.2 | 32.8 | 8.2 |
| Linkou | 355.7 | 7.63 | 2.2 | 9.15 | 3.95 |
| Tatan | 323.4 | 7.6 | 6.4 | 11.9 | 4.0 |
| Tunghsiao | 185 | 7.2 | 2.5 | 14.8 | 2.8 |
| Taichung | 479 | 7.9 | 4.0 | 10.8 | 1.7 |
| Hsinta | 828 | 7.4 | 4.1 | 12.1 | 3.5 |
| Nanpu | 64.7 | 7.9 | 7.88 | 12.95 | 4.2 |
| Talin | 399 | 7.9 | 8.6 | 19.3 | 1.8 |
| Standards | - | 6 ~ 9 | 30 | 100 | 30 |
Note: pH is the hydrogen ion concentration index.
| Power Plant |
Water Discharge (10,000 tons / day) |
Water Temperature at the Discharge Point (°C) |
the Temperature Difference of Surface Water 500m far from the Discharge Point (°C) |
|---|---|---|---|
| Hsiehho | 247 | 26.7 | 0.24 |
| Linkou | 876 | 30.17 | 0.27 |
| Tatan | 1015.6 | 30.49 | 1.74 |
| Tunghsiao | 729 | 30.5 | 0.10 |
| Taichung | 1656 | 28.3 | 0.17 |
| Hsinta | 724 | 28.6 | 0.29 |
| Nanpu | 265.6 | 32.7 | 0.70 |
| Talin | 875.76 | 31.53 | 0.21 |
| Standards | - | ＜42 | ＜4 |
Note: pH is the hydrogen ion concentration index.
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Water Discharge of Thermal Power Plants in 2025
Water Discharge of Thermal Power Plants (PDF)
pH of Thermal Power Plants in 2025
pH of Thermal Power Plants (PDF)
SS of Thermal Power Plants in 2025
SS of Thermal Power Plants (PDF)
COD of Thermal Power Plants in 2025
COD of Thermal Power Plants (PDF)
BOD of Thermal Power Plants in 2025
BOD of Thermal Power Plants (PDF)
Thermal Effluent Discharge of Thermal Power Plants in 2025
Thermal Effluent Discharge of Thermal Power Plants (PDF)
Thermal Effluent Temperature at the Discharge Point of Thermal Power Plants in 2025
Thermal Effluent Discharge of Thermal Power Plants (PDF)
The Temperature Difference OF Surface Water 500m far from the Thermal Effluent Discharge Point of Thermal Power Plants in 2025
The Temperature Difference OF Surface Water 500m far from the Thermal Effluent Discharge Point of Thermal Power Plants (PDF)