1. Water Quality Management
in Bangkok
By Miss Kate-rachada Klankrong
Department of Drainage and Sewerage
Bangkok Metropolitan Administration, Bangkok, Thailand

2. General Information of Bangkok
Water Quality Management in Bangkok
General Information of Bangkok
NONTHABURI
PATHUMTHANI
SAMUT PRAKAN
SAMUT
SONGKRAM
BANGKOK
THAILAND
BANGKOK MAP
Bangkok : Area 1,568.7 km2 Register Population 5.69 million (2015)
Surface Water: Canal 1,682 canals Length 2,604 km
Chao Praya River 372 km (Total Length) Bangkok 35 km
Source of Water Supply to Bangkok and vicinity: Upstream of Chao Praya River at Sam Lae, Pathum Thani
Water Consumption Rate in Bangkok (2015) : mil. m3/day

3. JICA Master Plan (27 zones)
Water Quality Management in Bangkok
JICA Master Plan (27 zones)
In 2011, Bangkok in collaboration with
JICA has proposed a 30-year master plan
for Bangkok to construct the wastewater
treatment . The construction area is
divided into 27 areas of wastewater
treatment cover 80-90% of total wastewater generated in Bangkok

4. Existing Central WWTPs in Bangkok
Water Quality Management in Bangkok
Existing Central WWTPs in Bangkok
Bangsue EECC
Year of operation : 2013
Service Area: 20.7km2
Population 223,990
Capacity 120,000m3/d
Source: JICA, 2011

5. Total Capacity of 8Central WWTPs
Water Quality Management in Bangkok
Total Capacity of 8Central WWTPs
Wastewater Plant
Population Served
Service Area
(sq.km.)
Capacity
(m3/d)
1. Si Phraya WWTP
120,000
2.7
30,000
2. Rattanakosin WWTP
70,000
4.1
40,000
3. Din Dang WWTP
1,080,000 37
350,000
4. Chong Non Si WWTP
580,000
28.5
200,000
5. Nong Khaem WWTP
520,000 44
157,000
6. Tung Kru WWTP
177,000 42
65,000
7. Chatu Chak WWTP
432,000
33.4
150,000
8. Bangsue EECC
223,990
20.7
Total
3,202,990
212.4
1,112,000
14% of total area
45% of wastewater generation in 2015

6. Bangkok Bang Sue Education and Environmental Conservation Center
Water Quality Management in Bangkok
Bangkok Bang Sue Education and Environmental Conservation Center
The 1st Underground Wastewater Treatment Plant in Bangkok

7. Future Scheme of WWTP Thonburi WWTP Minburi WWTP Nongbon WWTP
Water Quality Management in Bangkok
Future Scheme of WWTP
Service Areas : km2
Capacity : 10,000 m3/day
Service Areas : 71 km2
Capacity : 360,000 m3/day
Service Areas : km2
Capacity : 135,000 m3/day
Service Areas: km2
Capacity: 160,000 m3/day
Thonburi WWTP
Minburi WWTP
Nongbon WWTP
KlongToei WWTP

8. Total Capacity of Central WWTP
Water Quality Management in Bangkok
Total Capacity of Central WWTP
Wastewater Project
Population
Served
Service Area
(sq.km.)
Capacity
(m3/d)
Status
1. Minburi WWTP
13,000
4.43
10,000
FS and DD completed in 2012 and preparation for Construction
2. Thonburi WWTP
404,730
36.44
160,000
FS and DD in and preparation for PPP
3. Klong Toei WWTP
485,000 71
360,000
Preparation for DD and PPP
4. Nongbon WWTP
265,000
63.85
135,000
FS in 2011 by JICA and preparation for PPP
Total
1,167,730
175.72
665,000

9. Water Quality Management in Bangkok
Treated Water Reuse
In 2015, ~6% of treated water is reused for several purposes such as planting, cleaning the road and market

10. Sludge for Land Application
Water Quality Management in Bangkok
Sludge for Land Application
Thonburirom Park
Sirikit Park
Digested Sludge from WWTPs used as raw material for composting and then mainly provide to BMA public park
In 2015, about 13,150 m3 of sludge compost has been used

11. Challenges and Solutions
Water Management and Water Quality Control in Bangkok
Challenges and Solutions
“Public Private Partnership (PPP)” should be implemented for the future projects in order to solve the financial problems
“Treated Wastewater” is the alternative water for using in some specific activities (6% of treated wastewater using for watering plant, cleaning the road, flushing system etc.)
“People Participation” will pay an important role to improve the surface water quality
“Energy Saving Technology” for Wastewater Treatment System should be studied and applied for solving global warming

12. Thank You
for Your Attention