ieri, gist, korea depends on depends on
TRANSCRIPT
depends on
depends on
Appropriate Technology
for Drinking Water Treatment
Kyoung-Woong Kim and Yunho Lee Gwangju Institute of Science and Technology
Gwangju, Korea
IERI, GIST, Korea
A Lack of Clean Water & Sanitation in the Philippines
Kills 55 People Every Day
Over 30million people in the
Philippines do not have access
to improved sanitation
facilities," says Katrina Arianne
Ebora, who works on UNICEF's
Water, Sanitation and Hygiene
program in the Philippines.
Tondo, Manila
Tropical Cyclone “Winston” (Feb. 2016)
Dry Desert in Mongolia
Dry River Desertification in Govi-Altai
Flooding in Bayanolgy Heavy Rain at Ulanbataar
Mekong River - Area: 790,000 km2
- Laos (25%), Thailand (23%), China (21%), Cambodia (20%), Vietnam (8%), Myanmar (3%)
- Length: 4,020 km - Population: 250,000,000
Arsenic Disaster in Groundwater
As range (ppb)
0 200 400 600 800 1000 1200 1400
AG
DT
KG
LA
Ulanbaataar, Mongolia
Qurekuro, Fiji Tarawa, Kiribati
Field Test of GDM at Vunidawa Hospital
in Fiji
68.5 NTU 1.50 NTU
IN OUT unit pH 6.91 7.23 EC 925 923 μS/cm2 ORP 40.7 42 mV DO 15.3 14.7 mg/L COD 13~20 10 mg/L
Parameter (CFU/1ml)
IN (raw) OUT (filtered)
Aerobic bacteria 4500 14.7
Total Coliform 203±1.1 <1
E. Coli 8.3±2.9 0
Total Coliform (MPN) >2400 5
ATP (RNU) 58.5 6.5
95.8% removal
>99.8% removal
Mataika
Causeway East Village
Bikenaeka Village
Nawerewere Village
• Quantity and Size of GDM Units for Fiji - 250 mm x 250 mm: 14 - 250 mm x 180 mm: 9
• Quantity and Size of GDM Units for Kiribati
- Pre-assembled GDM system: 1 - 250 mm x 250 mm: 4 - 250 mm x 180 mm: 1
Supply of GDM Units
<GDM units for Fiji>
<GDM units for Kiribati>
• Installation of GDM Filtration System in Fiji and Kiribati - Training for officers in the Ministry of Health - Distribute the installation manual - Local officer will install the GDM to village - Continuous technical support will be conducted by
Installation of GDM and Training Plan
• Water Filtration Systems by Gravity-Driven Membrane
<Local Container type 1> <Pre-assembled unit> <Local Container type 2> - Original Purpose of Use: Waste Basket - Volume: 80L
- Original Purpose of Use: Waste Basket - Volume: 120L
- Manufacturer: Amogreentech in Korea - Volume: 40L
Raw Water
Coliform and E.coli Aerobic Bacteria
Parameter IN OUT
Turbidity (NTU) 1.76 1.20
Aerobic bacteria (CFU/ml) 2,570 0
Total Coliform (CFU/ml) 163 0
E. Coli (CFU/ml) 0 0
E. Coli (Most Probable Number/100 ml) 48.3 0
Filtered Water
Health Risk Category by WHO MPN Guideline : High Risk
Health Risk Category of by WHO MPN Guideline: Low Risk Turbidity Standard: 5 NTU Aerobic Bacteria: 100 CFU/ml Coliform and E.coli: 0 CFU/ml
WHO Most Probable Number Guideline - Low Risk: 0/100 ml - Intermediate Risk: 1 – 10/100 ml - High Risk: 10 – 100/ 100 ml - Very High Risk: > 100/ 100 ml
• The residents in Kiribati use rainwater for their drinking water without any treatment (disinfection) • The low-income people use contaminated well waters because they cannot afford water storage tank • The mortality rate among children under age five in Kiribati is 47 per 1,000 (probably related with
consuming contaminated water)
<Rain Water Storage Tank size: H: 1.5m, D: 2.5m> <Rain Water Storage Tank size: H: 2.5m, D: 1.5m> <Public Wells in Kiribati>
Large Scale GDM (Gravity Driven Membrane) System in Tuvalu
(Courtesy from Dr. Sunkwon Yoon at APEC Climate Center)
Tarawa in Kiribati (23 – 26 October, 2017)
Large Scale GDM at Taaken Bairiki Primary School
Large Scale GDM in Bairiki Community
E.coli and Aerobic Bacteria before Treatment
[Dilute the water 100 times]
E.coli and Aerobic Bacteria after Treatment
• Gravity driven system
• Effective against bacteria
• No maintenance
• No recurring costs
Citation per Faculty
Thank you for your attention !
Tarawa, Kiribati