2013年-世界发展银行全球_Vietnam_Urban_Wastewater_Review_158页_4mb

Vietnam Urban Wastewater Sector Review Summary (Report No: ACS7712)

Core Content

This report provides an overview of the performance of the urban wastewater sector in Vietnam, highlighting both achievements and challenges, and offering recommendations for improvement. It is part of the East Asian Urban Sanitation Review and focuses on the effectiveness of policies, institutions, technologies, and financial mechanisms in the context of urban sanitation development.

Main Findings on Sector Performance

• Since 1998, Vietnam has made significant progress in developing its urban wastewater sector through policy and investment initiatives.
• Access to sanitation: 94% of urban residents have access to toilets, with 90% using septic tanks for on-site treatment.
• Public sewerage: 60% of households discharge wastewater to public systems, mostly combined systems.
• Wastewater treatment plants (WWTPs): By 2012, 17 WWTPs were operational in major cities, with a total capacity of 530,000 m³/day. As of now, 32 new WWTPs are in design or construction.
• Investment: Annual investment in the sanitation sector was USD 150 million or USD 2.1 billion between 1995 and 2009, representing 0.45% of GDP.
• Cost recovery: Despite wastewater tariffs being about 10% of water tariffs, cost recovery remains low due to subsidies and inefficiencies.
• Institutional challenges: Wastewater enterprises operate under fixed annual budgets and have limited autonomy, leading to poor system optimization and maintenance.
• Effluent standards: Effluent regulations have undergone multiple revisions, creating uncertainty for local authorities. Current standards favor advanced technologies, making O&M costs unaffordable.
• Household connections: Connections to public sewerage systems are not mandatory in combined systems (CSS), leading to low organic loading at treatment plants. In separate systems (SSS), all households must be connected.
• Septage management: There is no effective septage management system in Vietnam, with only one city (Hai Phong) practicing scheduled emptying. Most septic tanks are poorly designed and operated, and fecal sludge is often managed by private entities without regulation.
• Financing needs: Estimated USD 8.3 billion is needed to provide sewerage for the projected 36 million urban population by 2025. Annual economic losses due to poor sanitation are USD 780 million or 1.3% of GDP.

Key Messages and Recommendations

For National Policy Makers

• National Strategy: Develop a national strategy based on integrated water resource management (IWRM) and a river basin approach to ensure sustainability and elevate urban sanitation on the political agenda.
• Financing Policies: Create appropriate financing mechanisms for both investment and operation and maintenance (O&M) of the sanitation sector, including grants, government bonds, tariffs, and public-private partnerships (PPPs).
• Utility Reform: Implement policies to support the creation of corporate utilities or private sector organizations that provide integrated water, sewerage, sanitation, and septage management services.
• PSP and PPP: Encourage private sector participation through incentives, regulatory reforms, and better business environments. Integration of water and wastewater services can enhance the viability of the sector.
• Effluent Standards: Introduce flexible effluent discharge standards based on the characteristics of receiving waters. Start with lower or no nutrient limits for non-sensitive waters and gradually introduce stricter standards.

For Local Governments and Sanitation Service Providers

• Strategic Planning: Adopt a strategic approach to sanitation planning that considers social, technical, institutional, and economic factors. Focus on user needs and develop infrastructure at the community level.
• Institutional and Regulatory Reforms: Establish efficient institutional and regulatory arrangements at the local level, including management contracts for O&M and regulatory bodies that approve tariffs and unit prices.
• Decentralized Systems: Choose between centralized and decentralized systems based on local conditions. Decentralized systems can be more cost-effective and suitable for areas with limited land availability.
• Infrastructure Development: Ensure that infrastructure development aligns with the city's master plan and includes both collection and treatment facilities. Encourage private sector involvement in septage management due to the limited capacity of public service providers.

Key Issues and Challenges

• Institutional limitations: Lack of autonomy and insufficient funding for wastewater enterprises.
• Technology choice: Over-reliance on advanced technologies, leading to high O&M costs and limited affordability.
• Household connections: Inadequate connections in combined systems, and lack of mandatory connections in separate systems.
• Septage management: Poorly managed and often unregulated, contributing to environmental degradation.
• Cost recovery: Low cost recovery due to subsidies and lack of effective tariff policies.

Conclusion

The urban wastewater sector in Vietnam has made progress, but significant challenges remain. Improving institutional frameworks, adopting integrated and flexible approaches, and encouraging private sector participation are critical to achieving sustainable urban sanitation. The report emphasizes the need for a national strategy, better financial mechanisms, and improved community engagement to support long-term development and performance of the sector.