Urban Infrastructure Supporting Wastewater Treatment Project，Laos
1. Project Overview
The Laos Urban Infrastructure Supporting Wastewater Treatment Project is a key environmental infrastructure component of China–Laos urban development cooperation.
The project is designed to serve newly developed urban districts, providing reliable municipal wastewater treatment and reclaimed water reuse capability under constrained land availability and limited local operation resources.
The system adopts an underground integrated wastewater treatment solution, enabling compact deployment, minimal surface occupation, and strong adaptability to Southeast Asian urban development conditions.
2. Client Challenges
The client faced several practical engineering and operational constraints:
- Rapid urban development with tight construction schedule
- Extremely limited land availability in the project area
- Requirement for reclaimed water reuse for municipal applications
- Strict requirements for noise and odor control in urban environment
- Limited local operation and maintenance technical capacity
- Need for stable long-term performance with minimal supervision
Deliver a compact, low-maintenance, and highly stable wastewater treatment system suitable for dense urban deployment.
3. Our Engineering Solution
SYNERAQUA implemented a compact EPC wastewater treatment solution based on a mature biological process combined with underground modular construction.
Process Flow
Domestic Sewage → Screening → Equalization Tank → A²/O Biological Treatment → Secondary Clarification → Disinfection → Reclaimed Water Storage → Reuse System
Engineering Strategy
- Underground integrated plant layout to save surface land
- Standardized modular equipment for fast installation
- Stable A²/O biological process for nutrient removal
- Reclaimed water reuse system for municipal greening
- Low-noise, low-odor operation design for urban compatibility
4. Key Technologies & Engineering Highlights
Underground Integrated WWTP Design
Minimizes surface land occupation and improves urban landscape compatibility.
A²/O Biological Nutrient Removal Process
Efficient removal of nitrogen and phosphorus under variable loading conditions.
Compact Modular Equipment System
Factory-prefabricated units enable rapid installation and reduced civil work.
Reclaimed Water Reuse System
Treated effluent is reused for municipal greening and miscellaneous applications.
Low-Noise & Odor Control Engineering Design
Ensures compliance with urban environmental requirements.
Intelligent Automation Control System
PLC-based automation enables stable and low-maintenance operation.
5. Performance Results
- Treatment Capacity: 200 m³/day
- Effluent Standard: GB/T 18920-2002
- Automation Level: Fully automated operation
- System Stability: >99%
- Operation Mode: Low-intervention unmanned operation concept
6. Project Value
The project delivers a sustainable urban wastewater solution tailored for developing urban infrastructure in Southeast Asia.
Key contributions include:
- Significant improvement in urban wastewater management capacity
- Efficient reuse of treated water for municipal applications
- Reduction of land occupation through underground design
- Lower operational complexity for local operators
- Improved environmental quality in urban development zones
- Strong support for long-term sustainable urban growth in Laos
