Yongji City Wastewater Treatment Plant Expansion Project
1 Project Overview
The Yongji City Wastewater Treatment Plant Expansion Project is a key municipal infrastructure upgrade project in Shanxi Province, China, aimed at improving urban wastewater treatment capacity and ensuring stable compliance with increasingly stringent environmental discharge standards.
The project focuses on expanding the existing wastewater treatment capacity to meet growing urban demand while optimizing treatment performance and improving effluent stability. The upgraded system enhances the overall resilience of the municipal water environment protection system.
2 Project Information
| Item | Details |
|---|---|
| Project Name | Yongji City Wastewater Treatment Plant Expansion Project |
| Location | Yongji City, Shanxi Province, China |
| Project Type | Municipal Wastewater Treatment Expansion |
| Treatment Capacity | 30,000 m³/day |
| Service Object | Urban domestic sewage system |
| Contract Model | EPC General Contracting |
| Core Process | A²/O Biological Treatment System |
| Application | Municipal wastewater treatment and discharge compliance |
3 Client Challenges
Rapid increase in urban wastewater discharge volume
Insufficient capacity of existing treatment facilities
Stricter national and regional discharge standards
Requirement to maintain continuous operation during expansion
Limited available land for system expansion
Need for stable long-term operational performance
Core Challenge
Expand existing wastewater treatment capacity while ensuring uninterrupted operation and stable effluent compliance
4 Engineering Solution
SYNERAQUA implemented a capacity expansion and process optimization solution based on the A²/O biological treatment process
Process Flow
Domestic Sewage → Screening → Equalization → A²/O Biological Treatment → Secondary Clarification → Disinfection → Effluent Discharge
The system upgrades biological treatment efficiency and hydraulic capacity while maintaining compatibility with existing infrastructure
5 Scope of Work
SYNERAQUA was responsible for full EPC delivery, including
Process optimization and expansion design
Biological treatment system construction
Secondary clarifier system upgrade
Electrical and instrumentation works
Automation and PLC control system
Equipment installation and integration
Commissioning and performance testing
Operator training and technical support
6 Key Technologies and Engineering Highlights
A²/O Biological Process Upgrade ensures improved nitrogen and phosphorus removal efficiency
Capacity Expansion Engineering enables increased treatment volume without interrupting existing operations
Automated Control System ensures stable and continuous plant operation
Integrated Retrofit Design maximizes use of existing infrastructure
Optimized Hydraulic Design improves system stability under variable load conditions
7 Performance Results
Treatment Capacity: 30,000 m³/day
Effluent Standard: Class I discharge standard
Automation Level: Fully automated operation
System Stability: >99 percent operational reliability
Continuous Operation: No shutdown during expansion
8 Project Value
The project significantly improves municipal wastewater treatment capacity and supports sustainable urban development in Yongji City
Key contributions include
Expanded municipal treatment capacity
Maintained continuous plant operation during upgrade
Improved effluent quality stability
Enhanced regional water environment protection
Strengthened urban infrastructure resilience
