SHIYu-long,BAOHai-peng,LIWei,et al.Low-carbon Operation Practice of Qinghe Ⅱ Wastewater Reclamation Plant under Beijing Drainage Group[J].China Water & Wastewater,2022,38(14):99-105.
Low-carbon Operation Practice of Qinghe Ⅱ Wastewater Reclamation Plant under Beijing Drainage Group
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第14期
Page:
99-105
Column:
Date of publication:
2022-07-17
- Keywords:
- wastewater reclamation; sludge treatment; energy conservation; carbon emissions reduction; anaerobic digestion; renewable energy
- Abstract:
- To achieve the “double carbon” targets, carbon emissions reduction is becoming increasingly important for wastewater reclamation plant. In 2021, Qinghe Ⅱ wastewater reclamation plant (QH Ⅱ) focused on energy conservation in wastewater treatment process and biogas production enhancement in sludge treatment process. It took advantages of watershed operation and stabilized inlet load through joint adjustment of watershed water quantity. Energy efficiency of major energy consuming equipment, such as blowers and inlet pumps, was optimized to ensure the timely matching of equipment working conditions and treatment process requirements. The average daily electricity use in wastewater area was 0.353 kW·h/m3, 20.7% lower than that of 2020, and CO2 emission was reduced by 26.1% corresponding to power saving. In response to changes in sludge characteristics and ammonia nitrogen load of digestion tank, the biogas production was steadily increased by ensuring the proportion of primary sludge, stabilizing the organic loading rate of digester, and regulating the water content of its feed sludge. The average biogas production from September to November was 298 m3/tDS, an increase of 21.6% compared with January to August. The CO2 emission reduction rate of three renewable energy projects, including biogas power generation, photovoltaic power generation and water source heat pump system, was nearly 22%. QH Ⅱ will continue to take the lead in the wastewater industry’s green and low?carbon transformation with energy conservation and renewable energy utilization.
Last Update:
2022-07-17