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명지대학교 환경생물공학과
원격자동제어MBR 하수고도처리 및 무방류 시스템 개발
연구책임자 : 안규홍 / 이용훈참여연구원 : 조진우 , 서영우 , Chackrit N.
2002/03/22
명지대학교 환경생물공학과
금수강산 21- 필요성
골프장골프장• 농약 (RUN OFF, 지하수 )• 환경호르몬류
점오염원점오염원• 질소 , 인 및 유기물• 산업폐수• 환경호르몬류
비점오염원비점오염원• 질소 , 인• 농약 등 환경 호르몬• 표면 유출 및 지하수 침투
정수정수장장
축산폐수축산폐수• 고농도 질소 및 유기물• 항생제등 난분해성 물질
200
250
300
350
400
1994 2001 2006 2011연도
억톤
-30
-20
-10
0
10
20
30수요 공급 과부족
물부족 전망물부족 전망
0
1
2
3
4
1992 1994 1996 1998 2000
, m
g/L
농도
COD(mg/L) T- N(mg/L)
팔당호 수질팔당호 수질
2 급수 COD
1 급수 COD
5 급수 T-N
2 급수 T-N
명지대학교 환경생물공학과
축산폐수축산폐수
점오염원점오염원
골프장골프장
비점오염원비점오염원
환경호르몬 관리기술
환경호르몬 관리기술
호소정화 및 호소정화 및 관리기술 관리기술
팔당호
중수도
및
오염예방기술
중수도
및
오염예방기술
정수장정수장
일급음용수 일급음용수 생산기술생산기술
금수강산 21- 연구개요
명지대학교 환경생물공학과
금수강산 21- 과제 구성
환경신소재 이용 오염예방 및 요소기술 개발
하이브리드 수처리시스템 개발
환경호르몬 조기검출및 저감기술 개발
안규홍 / 이용훈 ( 최승일)
유영숙 / 정봉철
박대원 / 심상준금 수 강 산
21송휴섭 / 안규홍
상수원 오염 자동감시온라인 센서 및 시스템 개발
이석헌 / 신평균
환경공정
미래기술
재료 시스템
생체과학
명지대학교 환경생물공학과
금수강산 21- 연구체계
- 서울대 , 고려대 ,
연세대 , KAIST,KJIST 등
총 27 개 대학
학계학계- 대기업
- 벤처형 중소기업
기업기업
- 건설기술연구원- 환경정책평가원
연구소연구소
- 국립환경연구원- 한강수질검사소- 한국수자원공사
국공립기관국공립기관- 미국 일리노이주립대- 미국 델라웨어주립대
-독일 KIST-유럽연구소
-테국 AIT 대학
해외해외
• 미래기술연구본부 • 환경공정연구부• 재료연구부• 시스템연구부• 생체과학연구부
금수강산 21연구사업단 (KIST)
• 청화대 비서실• 국무총리실 수질개선기획단 • 환경부• 건설교통부• 경기도 등 지차체
자문단 Pool
명지대학교 환경생물공학과
환경신소재 이용오염예방 및
요소기술 개발
금수강산 21- 환경신소재 이용 오염예방 및 요소기술 개발
고분자 분리막 소재 및 표면개질기술 개발
정범석
원격자동제어 MBR 하수고도처리 및 무방류
시스템 개발
안규홍 / 이용훈
수처리용 분해분리소재 기술 개발
김구대 / 최승일
미래 시스템
재료
명지대학교 환경생물공학과
I. Backgrounds
II. Research Objectives and Scopes
III. Materials and Methods
IV. Results & Discussions
CONTENTS
명지대학교 환경생물공학과
General Backgrounds
+
Membrane Bioreact
or
Submerged-typeMembrane BioReactor
=
Settling
Sludge Returning
Why MBR?
명지대학교 환경생물공학과
General Backgrounds
SMBR MBR fouling control by uplifting air compact and low energy consumption
fouling control by crossflow high energy consumption
Influent
Bioreactor
PEffluent
Suction pump
(submerged membrane)(submerged membrane)
Influent
Bioreactor
Effluent
Recircultionpump
(side-stream membrane)(side-stream membrane)
P
명지대학교 환경생물공학과
General Backgrounds
Fouling Additional Operating Cost
Backwashing
Chemical washing
Energy consumption
Replacement Prediction of Membrane fouling is very important
What is the main problem?
명지대학교 환경생물공학과
General Backgrounds
Membrane type Module type Operating strategy Cleaning strategy
Current issue : The role of SMP on membrane fouling
Fouling control
Organics Nutrients Biomass conc. Operating strategy
Water Quality
SRT HRT MLSS Wastewater Quality
Fouling factors
SMP
SMP relationship with fouling control & water quality
명지대학교 환경생물공학과
Research Objectives and Scopes
Development of SMBR system for wastewater treatment
Construct MMI system Provide MMI protocol versatile to other systems
Remote access via internet Real time maintenance and data collection
Remote control & monitoring
Zero-Discharging system Particulate free effluent Less Sludge Production
Optimal MBR operation Flux for stable MBR operation Physical & chemical cleaning methods for fouling control
Advanced wastewater treatment using membrane
명지대학교 환경생물공학과
Research Objectives and Scopes
Compare simulation results with experimental data from bench scale MBR
1.Establish mathematical model describing water quality and membrane fouling
2.Determine kinetic parameters by independent batch test1) Water quality : Kinetic parameters related with
EPS2) Membrane fouling : Specific resistance
3.Model evaluation & Simulations
1) Modifying ASM introducing EPS as soluble matters
2) Applying membrane fouling model
TSS and EPS as major membrane foulants
Introducing Specific resistance for considering EPS effects
3) Sensitivity analysis
명지대학교 환경생물공학과
Materials and Methods
Bench-scale SMBR system
SP
BPFPPM1,2,3
FM
AFM
AB
Temp
DO
Level
Membrane Module
Air LiftFeed Tank Effluent Tank
Wastewater
Effluent
Comparing data from bench scale MBR with simulation result
10L/min/moduleAeratio
n
Polyethylene with hydrophilic coating, 0.4 ㎛ hollow-fiber (MF, Mitsubishi Rayon, Japan) Effective filtration area of 0.2m2/module
Membrane
Municipal wastewaterInfluen
t
Suction
Resting
Backwashing
8 min.
2 min.
30 sec.
명지대학교 환경생물공학과
Materials and Methods
Remote monitoring and control
Control Center (KIST)
Local System (Kwangjoo)
Operator
MBR Reactor
CentralControl Center
Local ControlCenter
Remote Control
Monitoring/Alert Signal
(GUI system) InternetWAPMobile phone
Real-time monitoring
Real-time control
Data acquisiti
onOperation/System control
Monitoring Factors : Pressure, Flow-rate, DO, Temp, Level
Control Factors : Flow-rate, Operation time/interval, Aeration
명지대학교 환경생물공학과
Materials and Methods
Overall Modeling Structure
Influent
Modified ASM introducing SMP
Membrane fouling model Mass transfer onto Membrane
∆Resistance∆Transmembrane pressure
SSMP, XTSS
Effluent
명지대학교 환경생물공학과
Materials and Methods
Membrane fouling : Resistance in series Model
( )Attach TSS EPS
dmJ X S
dt
m Accumulated mass on membrane surface
Membrane(Rm)Shear stress
Permeate
t
PJ=
R
(Air bubbling effect)
Coefficient of crossflow effects (Shear force effects)
Km
명지대학교 환경생물공학과
Materials and Methods
αBiomass with SMP = fn (Conc. of Biomass & SMP)
10.5
Nitrogen gas
Solution reservoir
Magnetic stirrer
Flow meter
Pressure gauge
Membrane
Data collection
Permeate
Measuring Specific Resistance
Investigate the effects of TSS with EPS on membrane fouling Conditions : TSS=3,000;5,000;8,000;10,000;15,000 (mg MLSS/L) SMP=1;2;5;10;20 (relative concentration)
명지대학교 환경생물공학과
Materials and Methods
Extraction and Measurement of EPS
TOC analysis &Collect for batch test
Sampling & Centrifuging
Discard
Centrifuging
Washing with Saline and re-suspending by D.I water
Resin
Hydrophobic zone
Oligomer and small organics
Extracelluar ploymersPO4n-
COO-
OH-
N+ Bacteria
Ca2+
Ca2+
Ca2+
Ca2+
Ca2+
명지대학교 환경생물공학과
Results and Discussions
Design & operating parameters for a bench-scale SMBR system
- Effects of design parameters on hydrodynamic
conditions
- Effects of operating parameters on fouling and
critical flux Pressure gauge Permeate
Suction pump
Flow meterP
Dm Dm DWDW
Db
Dto
pD
mh
Blower 20.00 25.00 30.000.00 5.00 10.00 15.000.00
5.00
10.00
15.00
20.00
25.00
20.00 25.00 30.000.00 5.00 10.00 15.000.00
5.00
10.00
15.00
20.00
25.00
20.00 25.00 30.000.00 5.00 10.00 15.000.00
5.00
10.00
15.00
20.00
25.00
명지대학교 환경생물공학과
Results and Discussions
SMBR System installed in Kwangjoo WWTP
Green Korea 21 SMBR Plant Site Bench-scale MBR system
명지대학교 환경생물공학과
Results and Discussions
Total Suspended Solids accumulation
0
3000
6000
9000
12000
15000
0 20 40 60 80 100
15LMH 15LMH
Sludge Wasting
10LMH
Operating Days
To
tal
Su
spen
ded
So
lid
s (m
g
ML
SS
/L)
Operation halt two times for system repair
System AcclimationInitial MLSS 3,000mg/L
No Sludge wasting for 80 days
Sludge production rate for 80 days = 0.1gMLSS/day
MLSS 11,000±1,000mg/L
명지대학교 환경생물공학과
Results and Discussions
Flux variation due to membrane fouling
Flu
x (J
s/Jo
)
Operating Days
0
0.2
0.4
0.6
0.8
1
0 10 20 30 40 50 60 70 80
10LMH
15LMH 15LMH
System AcclimationInitial MLSS 3,000mg/L
Operation halt two times for system repair
No Feeding
MLSS 11,000±1,000mg/L
Outstream chemical washing
명지대학교 환경생물공학과
Results and Discussions
Effluent Quality Under Extended Aeration
0
100
200
300
400
500
0 20 40 60 80 100
Time elapsed(day)
TCOD variations
influent
effluent
mg
CO
Dc
r/L
TSS variations
Time elapsed(day)
TS
S (
mg
ML
SS
/L)
0
100
200
300
400
500
0 20 40 60 80 100
influent
No TSS in effluent (100% removal) More than 90% removal of TCOD
명지대학교 환경생물공학과
Results and Discussions
Model simulations for various conditions
Control factors : SRT, HRT, F/M RatioMonitoring factors : effluent quality and membrane flux variation The usage of simulation results
Predict effluent quality in given conditions
Determine optimal membrane regeneration time
Determine SRT and HRT for minimizing membrane fouling
명지대학교 환경생물공학과
Results and Discussions
Effects of SRT on flux decline
The rate of flux decline tends to increase with SRT
0.0
0.2
0.4
0.6
0.8
1.0
0 5 10 15 20 25
Operation time, Day
Sp
ec
ific
flu
x, J
/Jo
SRT=2
SRT=5
SRT=10
SRT=20
SRT=100
명지대학교 환경생물공학과
Results and Discussions
Effects of SRT on cleaning cycle
Cleaning cycle interval decrease with increasing SRT up to 20 days
0
10
20
30
40
50
60
70
0 20 40 60 80 100
SRT, Day
Cle
an
ing
Cy
cle
, D
ay
Js/Jo=0.2 Js/Jo=0.3 Js/Jo=0.5
명지대학교 환경생물공학과
Results and Discussions
Effects of SRT on TSS accumulation rate
The amount of TSS accumulation reaches a steady state value
0
20
40
60
80
0 5 10 15 20 25
Operation time, Day
Re
lati
ve
co
nc
. of
TS
S
SRT=2 SRT=5 SRT=10
SRT=20 SRT=50 SRT=100
명지대학교 환경생물공학과
Results and Discussions
Effects of SRT and F/M ratio on SMP
Region I : The relative SMP conc. decreases with increasing SRT
Region II : The relative SMP conc. seems to be independent of SRT
0.5
1.0
1.5
2.0
2.5
0.0 0.5 1.0 1.5 2.0 2.5
F/M Ratio
Re
lati
ve
co
nc
. of
SM
P
SRT=2
SRT=5
SRT=10
SRT=50
SRT=100
Region IIRegion I
F/M < 1.2 F/M > 1.2
명지대학교 환경생물공학과
Results and Discussions
Composition of effluent COD
The refractory matters such as SMP and inert soluble substances are critical factors affecting the effluent quality
0%
20%
40%
60%
80%
100%
120%
140%
2 5 10 20 50 100
SRT, Day
Co
nte
nt
of
Eff
lue
nt
CO
D, %
Readily biodegradable Inert soluble SMP
명지대학교 환경생물공학과
Thanks for your attention !