Chiang Mai Municipality Public Works Bureau Sanitary Engineering Division “ Cities 2030 – Cities for All: Implementing the New Urban Agenda” Kuala Lumpur , Malaysia, 7 to 13 February 2018
Chiang Mai MunicipalityPublic Works BureauSanitary Engineering Division
“ Cities 2030 – Cities for All: Implementing the New Urban Agenda”Kuala Lumpur , Malaysia, 7 to 13 February 2018
Chiang Mai
Chiang Mai MunicipalityPublic Works BureauSanitary Engineering Division
CHIANG MAI CURRENT SITUATION
Chaing Mai Municipality in collaboration with German International Cooperation(GIZ) under the project on Integrated Resource Management in Asian Cities : The Urban Nexus
Programs in the field of wastewater management and energy efficiency in the municipal area from 2013 - present
Project & Activities under the GIZ Nexus Program
1. Problem-solving of wastewater in the Mae Kha Canal2. Energy-efficient building design for elderly care center
3. Increasing Capacity of pump performance of fountain at city moat4. Wastewater Collection System in old town and whole-sale fresh market
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Maekha Canel
Muang Mai Market
1. Problem-solving of wastewater in the Mae Kha Canal
Mae Kha channelOxygen content
• Change of waste water collection system from open channel to pipes
Mae Kha channelRecommendations Long Term
Walkway
Bicycle lane
Mae Kha
Walkway
Mae Kha
Bicycle lane
CLEAN UP All EXISTED WASTEWATER COLLECTION SYSTEM
Raising public awareness
Conducting a stakeholders meeting from Muang Mai Fresh Market and Muang Samut to find solutions
PROJECT LOCATION
18°45'47.2"N / 99°00'40.9"E
Energy simulation model
2. Energy-efficient building design for elderly care center
GIZ in collaboration with the CMM design
an energy efficiency building for elderly care center to reduce energy use and more natural light and sun light
OPTION 1: Improved lighting system OPTION 2 : Improve window glazing tinted glazing
OPTION 2 : Improve window glazing: Double glazing with Low-E coating
OPTION 3: Roof Insulation
OPTION 4 : Additional windows and shading
OPTION 5 : Replace single speed split unites by inverter type split units
OPTION 6 : Photovoltaic OPTION 7 : set operative temperature at 26 ºC in non-active room
3. Improvement Efficiency of Pumps in City Moat
Pumps in the city moat of Chiang Mai, there are the 66 pumps in process water fountain pumps around the city moat surrounding the old city. Known for tourism, the city is keen to have these fountain fully functional at all time.
Pumps are operating 10 hours a day. However, the pumps consume a lot of energy, break down
often, and put stress on both budget and manpower for operation and maintenance
Team staff investigated pumps efficiency at city moat and problems could be found such as heat, fountain’s clogging and pressure
Solving problem of pumping fountain in city moat
Actual situation in Chiang Mai:Combined gravity storm- & waste-water collection system
Storm water drainage lines are used to drain:
• Effluent of the septic tanks
• Grey water (kitchens and bathrooms) > diluting effect
• Storm water (rainwater) > diluting effect > no energy recovery <
4. Wastewater Collection System in old town and whole-sale fresh market
Chiang Mai Municipality’s Boundary
Map of Chiang Mai Municipality
Current system - Combined system
Plan to shift to separated system
Vacuum sewer system introduced by GIZ
Old Town
Muang Mai Market
Problems of Muang Mai Market and Around
Alternative waste water collection system: Vacuum sewer collection
Vacuum System: Cost effectives
• Small pipes (80-250mm)• Shallow, narrow trenches (0,6 - 1.2m)• Simple and fast• Simple or even no machinery required
(Energy saving potential)• No manholes, inspection pipes only• No lifting (pump-) stations required• Fresh water and waste water pipes in the same
trench allowed
According to EN it is permitted to install both potable water
pipes as well as vacuum sewer pipes within one single
trench.
According to EN potable water pipes must be installed in a
separate trench and higher level than the gravity sewer
pipes.
Key lessons learn
• integrated management in all dimensions
• Efficient Energy Consumption
• Working in Collaboration with related agencies
• Public participatory process
Thank you