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Why Should We Pay Why Should We Pay Attention to Food Waste?Attention to Food Waste?
Increasing global Increasing global urban population urban population
(GUP)(GUP)
Increasing global Increasing global urban population urban population
(GUP)(GUP)
Increase of urban Increase of urban food waste (UFW)food waste (UFW)Increase of urban Increase of urban food waste (UFW)food waste (UFW)
*From 1950 -*From 1950 -2000, the GUP 2000, the GUP has increased has increased from 0.8 billion from 0.8 billion to 2.9, and will to 2.9, and will reach 5 bullion reach 5 bullion
by 2030by 2030
adds pressure to adds pressure to already over-already over-
loaded landfill sites loaded landfill sites
adds pressure to adds pressure to already over-already over-
loaded landfill sites loaded landfill sites
The Waste in Korea...The Waste in Korea...
30% of Korea’s urban garbage is composed of 30% of Korea’s urban garbage is composed of food wastefood waste
Korea creates 11,397 tons of food residual, Korea creates 11,397 tons of food residual, which is equivalent to 2849 of 4 ton trucks. which is equivalent to 2849 of 4 ton trucks.
Composition: Vegetable(46%) > Grain (22%) Composition: Vegetable(46%) > Grain (22%) Meat & Fish(16%) > Fruits (16%)Meat & Fish(16%) > Fruits (16%)
Source: Source: households(53%) > restaurants (47%)
Problems of Burying Problems of Burying WasteWaste
WastWastee
WastWastee
LandfilLandfillsls
LandfilLandfillsls
IncineratioIncinerationn
IncineratioIncinerationn
*Hard to find the right *Hard to find the right landland
*Expensive to take care *Expensive to take care of it afterwardsof it afterwards
*Produces large amounts *Produces large amounts of of
methane and carbon methane and carbon dioxidedioxide
*Hard to find the right *Hard to find the right landland
*Expensive to take care *Expensive to take care of it afterwardsof it afterwards
*Produces large amounts *Produces large amounts of of
methane and carbon methane and carbon dioxidedioxide
*S*Since most food wastes are soggy,
they decrease incineration efficiency
*S*Since most food wastes are soggy,
they decrease incineration efficiency
Especially Methane is greenhouse Especially Methane is greenhouse gas with 100 years of global gas with 100 years of global
warming potentialwarming potential
Solution?Solution?
Food contains a high degree of organic matters Food contains a high degree of organic matters and nutrients. and nutrients.
Thus, food waste can be reused as organic Thus, food waste can be reused as organic resources in the forms of animal feed and resources in the forms of animal feed and compostcompost
Simply reduce food leftoversSimply reduce food leftovers
Methods of RecyclingMethods of Recycling
Wet FodderWet Fodder
Dry FodderDry Fodder
CompostingComposting
Rubredoxin IncinerationRubredoxin Incineration
Use of worms and mushroomsUse of worms and mushrooms
Obstacles of Recycling Obstacles of Recycling Food Waste in KoreaFood Waste in Korea
There is a high salt contentThere is a high salt content
High Price: The average price of commercial compost in High Price: The average price of commercial compost in Korea is about US$2.00 for a 20-kg package, which is 20 Korea is about US$2.00 for a 20-kg package, which is 20 times higher than that of chemical fertilizer. times higher than that of chemical fertilizer.
There is a general perception that all trash go to There is a general perception that all trash go to incinerators or landfillsincinerators or landfills
Farms have refused to accept recycled fertilizers and feed Farms have refused to accept recycled fertilizers and feed materials, even though the government provides these materials, even though the government provides these items to farmers for free. items to farmers for free.
Consequently, many of the recycled fertilizers and feed Consequently, many of the recycled fertilizers and feed materials end up in landfills.materials end up in landfills.
Reduces the mass and volume transported to the Reduces the mass and volume transported to the landfill, and increases its lifelandfill, and increases its life
Composting has been a trend since mid 1980s Composting has been a trend since mid 1980s and food and restuarant waste composting is and food and restuarant waste composting is increasingincreasing
Composting of food waste in city itself reduces Composting of food waste in city itself reduces the transportation cost of MSW managementthe transportation cost of MSW management
Largely windrow-based technologies, in-Largely windrow-based technologies, in-vessel technologies are being usedvessel technologies are being used
Composting in GeneralComposting in General
CompostingComposting
Heat + Carbon Heat + Carbon Dioxide + Water Dioxide + Water
Vapor into airVapor into air
Heat + Carbon Heat + Carbon Dioxide + Water Dioxide + Water
Vapor into airVapor into air
Minerals and Minerals and organic organic
MaterialsMaterials
Minerals and Minerals and organic organic
MaterialsMaterials
at the same time...at the same time...
reusable soil reusable soil amendmentamendmentreusable soil reusable soil amendmentamendment
**
*Main Factors: moisture, temperature, *Main Factors: moisture, temperature, pH, intitial recipe C/N (carbon to pH, intitial recipe C/N (carbon to nitrogen ratio) ration and oxygennitrogen ratio) ration and oxygen
More about in-vessel More about in-vessel technologytechnology
ProcessProcess Can be fully controlledCan be fully controlled
OdorOdorcan be collected and treated can be collected and treated
before discharging in to before discharging in to atmosphereatmosphere
Bulking AgentsBulking Agents wood chips, saw dust, peat wood chips, saw dust, peat mossmoss
Problems of Composting Problems of Composting in Generalin General
The composting facilites should be compactThe composting facilites should be compact
The food waste needs to be mixed to a readily The food waste needs to be mixed to a readily available bulking agent to reduce its moisture available bulking agent to reduce its moisture content, but this bulking agent may not be content, but this bulking agent may not be readyready
Cooperation of the community is neededCooperation of the community is needed
The odors and leachate require special The odors and leachate require special attentionattention
Composting In KoreaComposting In Korea
113 places 113 places that recycle that recycle food waste food waste into fodderinto fodder
113 places 113 places that recycle that recycle food waste food waste into fodderinto fodder
96 places 96 places that that
compost compost food wastefood waste
96 places 96 places that that
compost compost food wastefood waste
90% of the 90% of the food waste is food waste is handled herehandled here
90% of the 90% of the food waste is food waste is handled herehandled here
89.7% of the waste 89.7% of the waste water created in the water created in the
process recycling process recycling food waste is food waste is created herecreated here
89.7% of the waste 89.7% of the waste water created in the water created in the
process recycling process recycling food waste is food waste is created herecreated here
More about Composting More about Composting - By-product Fertilizer- By-product Fertilizer
Raw MaterialRaw MaterialBy-products from fisheries, By-products from fisheries,
agriculture, food waste, and so agriculture, food waste, and so onon
Official Official StandardsStandards
Organic Matter: >20%Organic Matter: >20%Harmful Materials: below Harmful Materials: below
permitted levels of six kinds of permitted levels of six kinds of heavy materialheavy material
Moisture Moisture ContentContent 40-50%40-50%
MaturityMaturity Compost neededCompost needed
Worms!Worms!There are only three centers that raise worms for food wasteThere are only three centers that raise worms for food waste
only 0.42 of the waste water is created here, which is the only 0.42 of the waste water is created here, which is the least among all other places handling food wasteleast among all other places handling food waste
Since worms help natural decomposition and creation of Since worms help natural decomposition and creation of subsequent product (subsequent product ( 부변토부변토 ), this method is the most ), this method is the most nature-friendly.nature-friendly.
However, the study of the usage of worms is limited for nowHowever, the study of the usage of worms is limited for now
[[ 출처출처 ] ] 음식물쓰레기 재활용해야 인류가 산다음식물쓰레기 재활용해야 인류가 산다 -- 에코저널기고에코저널기고 --종합환경연구소 이승호종합환경연구소 이승호 || 작성자 이승호작성자 이승호
Food Waste Management in Food Waste Management in CanadaCanada
Western Canada Western Canada (BC-AB-SK-MB)(BC-AB-SK-MB)
98 facilities 98 facilities (43% of (43% of total)total)
867,761 tonnes 867,761 tonnes (22% of total)(22% of total)
OntarioOntario60 facilities 60 facilities
(26% of (26% of total)total)
681,089 tonnes 681,089 tonnes (17% of total)(17% of total)
QuebecQuebec29 facilities 29 facilities
(13% of (13% of total)total)
1,004,970 1,004,970 tonnes (26% of tonnes (26% of
total)total)
Atlantic Canada Atlantic Canada (NB-PE-NS-NF)(NB-PE-NS-NF)
40 facilities 40 facilities (18% of (18% of total)total)
1,393,363 1,393,363 tonnes (35% of tonnes (35% of
total)total)
FacilitiesFacilities
How is it in Canada?How is it in Canada?The Canadian composting industry is The Canadian composting industry is continuing to grow stronger. continuing to grow stronger.
There is a strong presence of residential There is a strong presence of residential backyard composting programs, and they are backyard composting programs, and they are proving their value for effective and efficient proving their value for effective and efficient management of organic residuals. management of organic residuals.
On a biannual basis, The Composting Council On a biannual basis, The Composting Council of Canada conducts a survey of centralized of Canada conducts a survey of centralized composting operations in Canada.composting operations in Canada.
providing a viable alternative to landfills for providing a viable alternative to landfills for organic materials as well as producing organic materials as well as producing products of value and interest to a variety of products of value and interest to a variety of markets. markets.
Worm Composting in Worm Composting in CanadaCanada
Worm composting is relatively new in Canada Worm composting is relatively new in Canada tootoo
http://www.wormcomposting.cahttp://www.wormcomposting.ca/ -> They / -> They currently sell Red Wiggler Worms (Eisenia currently sell Red Wiggler Worms (Eisenia fetida) for worm composting, fishing and live fetida) for worm composting, fishing and live food. food.
Canada is also recognizing the benefits of Canada is also recognizing the benefits of organic decomposition organic decomposition
So...So...
Food waste is causing great Food waste is causing great problems around the worldproblems around the world
Many countries are using Many countries are using composting nowadays composting nowadays
Still...reducing food waste is the Still...reducing food waste is the most effective way...so eat your most effective way...so eat your FOOD!FOOD!
CitationCitation
http://www.wormcomposting.cahttp://www.wormcomposting.ca//
http://www.agnet.org/library/eb/503/http://www.agnet.org/library/eb/503/
http://eng.me.go.kr/docs/common/common_viehttp://eng.me.go.kr/docs/common/common_view.html?idx=54&av_pg=1&mcode=10&classnow.html?idx=54&av_pg=1&mcode=10&classno=12=12
http://www.abanet.org/environ/committees/http://www.abanet.org/environ/committees/intenviron/newsletter/feb03/korea/intenviron/newsletter/feb03/korea/
http://blog.naver.com/shl1472?http://blog.naver.com/shl1472?Redirect=Log&logNo=130009241577Redirect=Log&logNo=130009241577
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