2011/9/22

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Reported by: To Thi Hai Yen

Institute of Environmental Technology

Vietnamese Academy of Science and Technology

Situation and history of domestic wastewater treatment in Viet Nam wastewater treatment in Viet Nam especially urban area

Background of construction of sewerage pipe without treatment and its positive/negative impact

Outline of current situation and future plan pof domestic wastewater treatment facility development

Expected outcome and issues of future plan

2011/9/22

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Hanoi’s River and lake Network

Inside Hanoi, there were many lakes and ponds, small rivers and canals flowed around.Wastewater flowed out to the surrounding lakes, ponds and rivers.

2011/9/22

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About 70% of the lake and pond area had been filled up pond area had been filled up in the period 1955-2000

In 1960, there were many lakes and canals in this district

In 2004, many lakes were filled up and canals were sewerized

Blackwater after the septic tank the septic tank was still heavy polluted because of working without filtration chamber

2011/9/22

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Existing sewer k i i i network in cities

have been built for surface water drainage only

Sewerage and drainage system combines both: the collection of collection of industrial and domestic wastewater, storm water and street cleaning water

Some Health care centers has adequate wastewater treatment systems, others, is still discharged into sewerage system without treatment. Similar situation could be without treatment. industrial parks that have waste water treatment systems.

S la s tuat o could be seen for industrial areas. Among 26 industrial parks, 40 industrial …, 50 handicraft villages, there are only 3 industrial parks that have waste water treatment systems.

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Master plan of waste water drainage and water drainage and wastewater treatment in Total investment was of 1.162 M USD and divised into 2 phases focusing on enhancing capacity enhancing capacity of water drainage system, minimizing storm flooding of the downtown.

Drainage systems of Tolich, Nhue –Day water basins dwntown flooding has water basins, dwntown flooding has been controlled, river and lakes water quality is being enhanced. Hanoi’s River and lake Network

2011/9/22

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Joint Circular No. 114/2006/TTLT-BTC-BTNMT: 1% of GDPC i l l i L N i f f b Capital planning Law No.: infrastructure for urban areas, including water transmission lines, sewer lines.

Resolution of the Hanoi City Council No. 03/2009/NQ-HDND for wastewater: 10 -15% of household wastewater, 40% of industrial wastewater, 100% of medical wastewater in the inner cities must be treated

Decision No. 1930 / QD-TTg: approve the d l f b d i d i d i l development of urban drainage and industrial zones by 2025 toward to 2050.

Decision No. 1654/QD-TTg: drainage plans to Hanoi in 2030 toward to 2050, comprehensive system of sewer, no flooding of Hanoi city, centralized wastewater treatment facility.

Alternative solutions of urban drainage were proposed by scientists:

-For old urban areas: Utilize existing system of drainage, septic tanks; collection systems to big treatment systems,

d b b h l d d i constructed at a suburbs where land and construction cost are relatively cheaper, or to decentralized treatment systems in the downtown.

Utilize existing water ponds in the downtown,

-For new urban areas: construct separated sewage system, sewage should be treated before discharge into environment; construct new effective septic tanks to ensure effluent quality meet TCVN (Class B) in case of lack of construction land

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In 2020: 1,014,000m3/day

In 2030: In 2030: 1,380,000m3/day.

A target of Hanoi city is to collect and treat 90% of sewage up to 2020, 100% up to 2030.

Continuing achieved results of the plan is

id d considered necessary; New, effective and

complex solutions of management should be arranged from now.

West Lake in Hanoi