Overview of Sanitation and Wastewater Management in Vietnamese Urban Sector

Transcription

1 Training Workshop "Strategic Planning for Integrated Urban Wastewater Management", Hanoi, 10/2010 Overview of Sanitation and Wastewater Management in Vietnamese Urban Sector Assoc. Prof. Dr. Nguyen Viet Anh Vice Director, Institute of Environmental Science and Engineering (IESE), Hanoi University of Civil Engineering Add. 55 Giai Phong Rd. Hanoi, Vietnam. Tel , Fax , MP ,

2 Content 1. Overview of urban sanitation situation 2. Legislations, management and finance 3. Technological options 4. The way forward: recommendations and conclusions 2

3 1. Overview on Vietnam Urban Sanitation 10/2010: >760 cities and towns, with 30% population 40-70% population have access to sanitation service (sewerage and drainage network) Access to toilets: > 90% Only <10% of urban wastewater is treated Hanoi, Vietnam 3

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5 Economic loss due to poor sanitation in Vietnam Annual loss: US$ 780 mio. Per capita: US$ % GDP Economic loss (US$ million) Health Water Environment Other welfare Tourism Source: Evaluation of the Economic Impacts of Sanitation in Vietnam (WSP, 2007) 5

6 Septage (~ 200 m3 /day) Storm water Combined sewer DVCT Septic tank CSO (~ 3200 Sludge m 3 /day) Grey water WWTPs Septage Grey water Black water ST effluent Reuse in agriculture Fish pond Sludge (~ 300 m 3 /day) 6

7 Failures? 7

8 2. Legislations, management and finance Urban sanitation projects are gradually covering centers of the cities and towns of different categories (special, 1 st,..., 5 th ). Active donors: ADB, WB, JICA, AFD, Danida, Finnida, KfW and GTZ, Ausaid... Number of NGOs. By 2020 (MOC): 100% of large urban centers will have adequate wastewater treatment systems (???) The total urban sewerage service coverage will be 80-90%. (???) 8

9 Government Policies and Programs Law on Environmental Protection (revised) (2005) Government Decree No. 67/2003, followed by Decree no. 04/2007: Environmental fee for industrial wastewater Government Decrees No. 59, 88, 115/2007 Prime Minister s Decision No & 1930: Orientation for Urban and Industrial Water Supply, Wastewater Development (2009) U3SAP: Initiated in 2005, Proposed to GoV in 2007, Commenced

10 Financing mechanism for sanitation projects Water supply: Loans. Full recovery policy. Sanitation: State budget subsidiary for investment. Projects on water drainage and treatment of wastewater in urban centres and population quarters, ODA capital shall be wholly allocated from the central budget, while their reciprocal capital shall be apportioned from the local budgets. 10

11 Financing mechanism for sanitation projects Work order for O&M: paid by city s budget. Part of it: collected wastewater fees. Urban wastewater fee: 10% surcharge to water bill. Hai Phong city: 15%. Other cities are preparing to increase. For not connected households: environmental fee (10%). (Decree No. 67/2003 to be revised). Industrial wastewater charges: Decree No. 67/2003, followed by Decree No. 04/2007 (kg of COD, BOD, SS, heavy metals discharged) 11

12 Financial need for Sanitation in Vietnam Over last 20 years: USD 2 bio. have been invested for WS&S (not including household contribution). Among those: 80% is from ODA. Sanitation need for Urban + Rural Area (our calculation): 2010: 2, ,7 bio. USD 2020: 4, ,2 bio. USD Industries (MOIT s calculation): 2010 and beyond: > 7,6 bio. USD 12

13 Mobilization of new resources The Government is seeking to mobilize both financial and technical resources from various sources. A set of reforms and measures have been initiated to attract foreign private participation in infrastructure. These efforts have concentrated on issues related to the implementation of Build, Operate and Transfer (BOT) projects as well as to institutional competence and capacity. Micro-finance via Banks Revolving fund (via local Women s Unions) for: Construction of hygienic toilets, septic tank emptying, connection to the sewer, etc. 13

14 Institutional and managerial aspects Lack of commitments. Vietnamese environmental standards are still not fully developed. Still some gaps and contradicting matters Class B or C is applied within a city? Value of some parameters do not comply with available and affordable technologies. QCVN 14:2008: secondary treatment can allows to achieve column B for BOD, TSS. However, for nutrients (N, P), pathogens: some additional (tertiary) treatment, high rate of flow return (A 2 O), strong disinfection is required. This leads to inefficient expenses and no-equity among different wastewater dischargers. 14

15 Actors Designers: lack of data, knowledge and experience, tightness of budget (e.g. to carry out pre-design fact-finding studies). Design consultants do not get encouragement in low-cost options: the design fee is calculated based on the project construction cost percentage. Design quality and its appraisal is also an issue especially in the remote areas. Lack of third-party testing and certificating organization for the wastewater treatment technologies and equipment. Constructors: build according to a design approved by authorities. Designers and constructors blame many of the operational problems to the owners. Owners: disrepair, lack of funds for O&M, insufficient training of operators. Lacking of incentive measures does not encourage polluters to improve their situation. Weak environmental pollution control capacity at different, especially local levels. 15

16 Financial aspects Wastewater fees is still very low in urban areas, and zero in rural areas (Decree 88 ) Private sector is till not interested in this business. No recovery for O&M and system upgrading Lack of financial sustainability after construction works. Social aspects Traditional acceptance of untreated wastewater disposal by most of people. Wastewater reuse attitudes of the public and policy makers hinder the adoption of wastewater treatment and safe reuse systems. The main challenge is to create informed demand for improved sanitation. 16

17 Private Sector Participation in Sanitation Septage sludge management Solid waste collection and disposal Solid waste treatment and utilization 17

18 3. Technological options 18

19 Hanoi city Hanoi: Yen So WWTP by Gamuda Berhad (Malaysia), US$ 400 mio., Q = m 3 /day ( ). Build Transfer (BT) after 1 year. In the 324 ha (including 280 ha water surface) new commercial area: Yen So Park, US$ 1 bio. Hanoi is inviting private sector to participate in restoration of 45 city s lakes. Est. cost: US$ 80 mio. ( ). 19

20 Binh Hung Hoa WWTP, HCMC Q = 46,000 m 3 /day F = 37 ha K = EUR mio. Low O&M costs 20

21 Buon Ma Thuot WWTP, Dak Lak Danida fund: DKK mio. ( ) Design capacity: 8,000 m 3 /day 5,500 households connected Reuse of treated wastewater for irrigation of 186 ha of Coffee Near future: wastewater fee and irrigation fee phase 2 for more connections 21

22 Bai Chay WWTP, Quang Ninh 22

23 COMMUNITY-BASED SANITATION WITH LOW-COST TECHNOLOGIES BASTAF HF CW (Fish) Pond Hanoi new living quarter Hanoi - village Bac Ninh living quarter Bac Kan small town Hanoi - school 23

24 Compact w/w treatment station AFSB AFSB for Hospital AFSB for Resort 24

25 Hanoi office bldg. Hanoi new apartment Hai Phong Island resort 25

26 On-site w/w treatment systems

27 Technical aspects Collection of wastewater: little national and international experience in combined drains + septic tanks. Design guidelines are still lacking. Most of urban sanitation projects: neglect tertiary network. Environmental sanitation and infrastructure planning of the community is lacking. Environmental industry is still very weak. Lack of firms capacity for R&D, marketing strategy, etc. Import of hi-tech products with heavy armed marketing campaigns are contributing to weaken this young industry. 27

28 Reuse of wastewater and sludge in agriculture economic values and health risks 28

29 4. The way forward 29

30 Sanitation has to be started from the household! In-door sanitation Cluster sanitation Centralized sanitation facilities Discharge/Reuse 30

31 Centralized vs. Decentralized Combination of different options Cost-benefit analysis of different sanitation options should be developed. We need information of unit costs of different sanitation options, in different local contexts 31

32 Change of unit costs of sanitation options with different population densities Unit cost, $/per.year A E B D 1 C P o p u la tio n d e n s ity, p e r/h a Unit costs: investment + O&M expenses. 1, 2: low-tech and high-tech on-site sanitation facilities. 3: centralized systems 4: decentralized systems. BCD: Optimum zone for DESA application 32

33 A NEW INTEGRATED, SUSTAINABLE APPROACHES: SEMI-CENTRALIZED SANITATION Semi-Centralized Sanitation System

34 Biogas digesters for sludge treatment Biogas digesters Biogas digesters for organic waste treatment

35 A transition to alternative financing modalities for local authorities (decentralization process). Graded subsidy models for financially weaker authorities. More budget allocation for urban water supply and sanitation - crucial need. Other sources but overseas development aid and government funds are to be mobilized. To date, most sanitation investment has been by household self-provision. An incentive system for attracting private sector engagement in the financing and provision of sanitation services (land use and investment opportunities, favour tax and tariffs settings, etc.) would increase private sector investment. Involvement of the private sector will also contribute to the improvement of operational efficiencies and customer service. 35

36 Tariffs should cover both O&M costs and the depreciation of short lived assets. Financial models are required at all levels to achieve this. Affordability for Low Income Groups is also to be considered Transformation of local wastewater and urban environmental companies into limited liability companies. More capacity and independence to provide services and to do business. More capacity building on operation, maintenance and financial management. Transfer of investment and O&M to commercialized operation divisions. Implementation of the policy of cost recovery for O&M of drainage and sewerage / wastewater treatment system. Appropriate, affordable technologies for different contexts: geographical, urban centers/peri-urban/rural, etc. 36

37 Financial aspects To mobilize different financial sources. Micro-financing Revolving fund in urban areas Micro-credit in rural areas In urban areas: costs of sanitation ST & connection to sewer: 0.1 1% toilet & bathroom: 0.3 5% of the total cost spent for the land and the building. Understanding will certainly lead house owners to invest for their infrastructure early & reduce overall expenses. & to pay for recovery of O&M expenses. 37

38 New concept: Rainwater harvesting and grey water reuse 38

39 Strategic Sanitation Solutions for the proposed Central Business District of Thu Thiem, Ho Chi Minh City, Viet Nam 39

40 THE PAST... THE FUTURE 40

41 Thank you very much for your attention Assoc. Prof. Dr. Nguyen Viet Anh Vice Director, Institute of Environmental Science and Engineering (IESE), Hanoi University of Civil Engineering Add. 55 Giai Phong Rd. Hanoi, Vietnam. Tel , Fax , MP ,