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The wastewater of pig farm is treated by aerobic and anaerobic sewage treatment system and discharged to the standard. A small amount of biogas is generated when it passes through the anaerobic reactor. Therefore, the small sewage biogas project aims at the discharge of sewage to the standard and generates biogas energy at the same time, the biogas output of this project is 2000m³/d.
| Source of wastewater | Pig aquaculture wastewater |
| Characteristics of wastewater | Wastewater quantity:1200m³/d. The concentration of suspended matter and ammonia nitrogen pollutants is high, and the values of CODcr, BOD5, TP and other pollutants are different in different water sections |
Parameter of Wastewater
| Index | COD | BOD5 | NH3-N | TP | SS |
| Inflow water data | ≤18000 | ≤8000 | ≤2200 | ≤200 | ≤12000 |
| Effluent water data | ≤150 | ≤60 | ≤80 | ≤8 | ≤80 |
