The 3rd WEPA Workshop and the 7th Annual Meeting

Policy of Domestic
Wastewater Treatment
In KOREA

Ministry of Environment

The 3rd WEPA Workshop and the 7th Annual Meeting

CONTENTⅠ Change of National Policy with times
Ⅱ Cost of Domestic Wastewater Treatment
j Issue at this time and future
Ⅲ a Major

1

A Change of National Policy with times
1966

Enactment of Sewerage(Sewerage(DomesticDomestic Wastewater)lawWastewater)law at first

1976

First Build, Public Owned Sewerage treatment Plant

1990“MinistryMinistry of Environment”
Environment
management works

takecareofsewerage

2002

Reorganize and modify of sewer pipeline in whole country

2007

Amendment of entire sewerage law(Sewerage be treated withnight soil in a plant, together)
together

2011~

Revision a management of sewerage facility, Consolidate aprevention water pollution and water reuse and recycle

National Budget
By the late 1980s, Intensive investment in sewerage system began
Large-scale Public Domestic Wastewater treatment plants were constructed(But, Sewerage Pipelines was not sufficiently complete in national wide)

Large amount of National budge invested in sewer pipelines and public sewera
Treatment plant from 2002

From 1992 ~1999 Total 17 billion US$ national Budget be invested
Item
Totalinvestment(billion $)Facility Build(no., Km)

1992~1995

Until 2000

Until 2009

Recent10 years
3.6 times
increased
3.3times
increased
4.7times
increased

Total

0.8

4.7

17

Treatment
plant

0.7

3.5

12

Sewer
pipe

0.1

1.2

5.6

Treatment
plant

71

172

438

2.5times
increased

Sewer
pipe

52,784

68,201

107,843

1.6times
increased2

Building a Public sewerage system
Rate of Domestic

8.5%(’86) ⇒ 37.0%(’87) ⇒ 52.6%(’96) ⇒ 85.5%(’06) ⇒ 89.4%
89.4%(’09)(’09)

Wastewater treatment

Rate of Sewerage
pipeline(1000 ton/day)

48.3%(’86)%( ) ⇒ 49.5%(’87)%( ) ⇒ 62.6%(’96)%( ) ⇒ 71.2%(’06)%( ) ⇒ 75.4%(’09)
75.4%%(’09)( )Rate and Capacity

Supply rate of(Length : Km)

Treatment

Sewerage Pipeline

Facility capacity
Planned length(km)(1000 ton/day)

Facility length(km)Supply rate(%)
Supply rate(%)

3

Generation and treatment of sludge
Generation

3,557 ton/day(’96) ⇒ 7,446 ton/day(’06) ⇒ 8,295 ton/day(’09)
ton/day(’09)

Treatment
means(2009)

Ocean dumping 3,911ton/day,3,911ton/day reuse 2,044ton/day,Incineration 1,123ton/day, reclamation 1,208ton/day(1000 ton/day)cNo. of plants

Reclamation
매립(14.6%)

Treatment facility capacity
Sewage treatment facility no.

소각(13.5%)

Incineration

Treatment

Ocean
해양배출
dumping(47.2%)

methods재활용(24.7%)

Recycle43

Charge of Sewerage discharge

Charge of Sewerage discharge is 38.3% of prime cost (prime cost oftreatment is about 0.7 $/ton)Prime cost is increasing due to tighten up a treatment levels.

Levied unit cost(A)Treatment unitcost(B)Realization
ratio(A/B)

6What is to be done at Future
1Improve water quality in Rivers

Reinforce Effluent limits to prevent eutrophication in rivers
ㅇ TheTh eutrophication
thi ti off rivers
iandd llakes
k ddeterioratet i t ththe watert quality,
lit
increases the cost of treatment and management<Effluent limits of Domestic Wastewater Treatment Plant>
Item

BOD(㎎BOD(㎎/L)

COD(㎎COD(㎎/L)

SS(㎎SS(㎎/L)

T-N(N(㎎㎎/L)

T-P(P(㎎㎎/L)

ZoneⅠ
Zone
Ⅰ

under 5

Under 20

Under 10

Under 20

Under 0.2

ZoneⅡ
Zone
Ⅱ

Under 5Under 20

Under 10

Under 20

Under 0.3

ZoneⅢ
Zone
Ⅲ

Under 10

Under 40

Under 10

Under 20

Under 0.5

ZoneⅣ
Zone
Ⅳ

Under 10

Under 40

Under 10

Under 20

Under 24

What is to be done at Future
2Reuse and Recycle
AAmountof reuse of treated sewage water ((raini water))Is 9.43 hundred million tons,
tons It is taking up 2.8%of total water Resources (337 hundred million tons)
in Korea. 2009

What is to be done at Future
3Upgrade a Domestic Wastewater Treatment System• Install new facility to Prevent

the Overflows(CSO, SSO) by Heavy Rainfall- theth CSO(SSO) willill bbe pathth ththought
ht tto D
Domesticti W
Wastewatertt Treatment
T tt SystemS t

Reduce of CO2 release for Climate Change prevention• Reuse and Recycle Sewerage as Industrial and Residential Water after be Treated• We are aiming to reduce the demand for energy in POTWs by 50%

Reduce the Demand of energy : 2008 0.8% → 2020 30% → 2030 50%

5The 3rd WEPA Workshop and the 7th Annual Meeting6