초록 ▼

개발 목적 및 필요성
하수 처리수의 재이용, 빗물이용 및 우수 유출저감 등 다양한 수생태계 복원용수의 확보 및 물 유효이용 기술의 개발을 통해 수자원을 안정적으로 확보하는데 있음

연구개발 결과
본 과제를 통해 개발된 하천 생태복원용수 확보 기술 및 제품들은 물 순환회복에 기여하여 지속가능한 개발에 활용될 수 있으며, 단순히 하천에 용수를 공급하는 목적 외에도 도시의 경관 향상, 강우유출 저감을 통한 홍수예방, 지하수 확보, 빗물재이용 등 다른 연관된 환경문제 해결에도 기여할 것으로 판단됨

본 연구

개발 목적 및 필요성
하수 처리수의 재이용, 빗물이용 및 우수 유출저감 등 다양한 수생태계 복원용수의 확보 및 물 유효이용 기술의 개발을 통해 수자원을 안정적으로 확보하는데 있음

연구개발 결과
본 과제를 통해 개발된 하천 생태복원용수 확보 기술 및 제품들은 물 순환회복에 기여하여 지속가능한 개발에 활용될 수 있으며, 단순히 하천에 용수를 공급하는 목적 외에도 도시의 경관 향상, 강우유출 저감을 통한 홍수예방, 지하수 확보, 빗물재이용 등 다른 연관된 환경문제 해결에도 기여할 것으로 판단됨

본 연구과제를 통해 개발된 성과는 다음과 같다
○ 생태복원용수확보기술 개발(여과시설)
- 금속망여과장치
- 섬유망 여과장치
- 와류형전처리장치
- 협잡물제거설비
- 고효율 인처리시스템(인흡착필터)

○ 지적재산권 확보
- 여과필터를이용한 수처리장치
- 고효율 인처리시스템
- 수처리용 여과망 유닛
- 지르코늄페라이트 충진카트리지 필터를 이용한 폐수방류수의 인제거,
- 정체성 수역의 이동식 조류제거 시스템
- 여재간 분산을 방지하는 여과장치
- 여과 및 세척효율이 우수한 적층형여과장치
- 금속망필터를 이용한 여과장치

○ 환경신기술 인증
- 경사판침전 및 EVA여재를 이용한 초기우수처리기술

○ 기타
- 사업화 13건, 국내외 학술발표 13건, 언론홍보 2건

성능사양 및 기술개발 수준
∙ 금속망 여과장치
- pore Size 가 다른 다수의 metal sieve(3~5 layer)가 적층된 상태로 소결
- 여과필터 내측에 고압노즐과 여과필터의 외측면으로부터 분리되는 이물질 이송 어셈블리로 이루어진 필터 세정수단, 연속 운전 가능

∙ 섬유망 여과장치
- 고밀도 섬유상 여과망을 이용한 SS 제거효율이 우수한 고액분리 장치
- 이동식 왕복운동을 통한 역세실시로 여과막 전체를 균일하게 세척 가능

∙ 와류형 전처리 장치
- 생활하수, 공업폐수, 강우 유출수 전처리
- 침전 및 여과에 의한 협잡물, 토사, 부유물질 제거

∙ 하천협잡물 제거장치
- 자연적인 하천의 흐름을 이용한 부유오염물질 제거장치
- 유지관리비용 저렴(무동력), 추가 정화공법 불필요

∙ 고효율 인처리 시스템
- Jet-mixer 및 Jet-filter를 통한 혼합여과방식 구조, 인처리 효율 극대화
- T-P(총인) 농도를 0.2ppm까지 처리가능

∙ 경사판 + EVA 여재
- 생태복원용수 사용원수로 우수를 이용
- 경사판 침전 및 EVA여재를 이용한 연속세척 초기우수처리기술

활용계획
본 연구개발 결과물의 활용으로 유량은 물론, 기준을 만족하는 수질의 확보가 절실히 요구되는 중․소규모 하천에 실질적으로 적정수질의 유지유량을 확보함으로서 하천으로서의 역할을 위한 본 기능의 회복과 동시에 소하천, 도심하천 및 인공하천 등 중․소규모 수계의 수문순환을 정상화하여 하천의 지속 가능한 개발과 관리가 효율적으로 이루어지도록 하는데 이용될 수 있을 것으로 예상되며, 수계별 주요 하천의 환경유량 조사 및 산정 기준제공 및 향후 하천수량 관리 기준 수립에 활용가능

하수처리장으로부터 방류되는 처리수의 재처리를 통해 하천 및 해양수질 개선을 유도하는 기술로 활용가능하며, 생태계의 유지, 쾌적한 환경제공, 용수공급, 치수 등과 같은 다양한 기능을 수행할 수 있는 하천으로서의 개선을 위하여 하수처리수를 활용함으로써 수자원의 재사용을 통한 경제적 하천개발에 기초적인 기술을 제공하게 됨

( 출처 : 요약서 )

Abstract ▼

Ⅳ. Results
1. Development of water supply technology for Ecological Rehabilitation
a. Development of Ecological Restoration Water Retainment (Filtration)
(1) Metal Sieve Filtration
(a) Result
- The metal sieve filtration with a quantity of 1,000ton/day was constructed as Test-bed in S

Ⅳ. Results
1. Development of water supply technology for Ecological Rehabilitation
a. Development of Ecological Restoration Water Retainment (Filtration)
(1) Metal Sieve Filtration
(a) Result
- The metal sieve filtration with a quantity of 1,000ton/day was constructed as Test-bed in September 2011 supported by Paju Heyri Village, The monitoring was performed from November 2011.
- Samples were collected at two points (ST.1, ST.2) in Heyri pond for three (3) times analysing six (6) parameters of BOD, COD, SS, T-N, T-P, Ch1-1. During rainy season, the quality of water inflow was observed to be affected by the level of rainfall and temperature change. However, the quality of retained water was improved with the result of above 85% removal of SS and Chl-a.
- Existing facility of 1,000ton/day was removed as the research project is finished in 2014, instead the facility is commercialized to operate with 3,000ton/day.

(b) Chracteristic of metal sieve filtration
The metal sieve filtration of water purification system was designed to remove fine suspended solids (SS) through solid-liquid separation in contaminated water based on sieving principal of filtration (10~50㎛). The filtration was able to reduce SS followed by BOD, COD, T-P, and this is applicable to purify water quality of the following application: sewage and lake, removal of algae in retained water, an advanced treatment or tertiary treatment of sewage/wastewater treatment facility, food and paper manufacturing plant, cooling tower in power plant, circulation system in steel mill, and wastewater reclamation and reusing system.

① Significant mechanical strength of metal sieve filter than fiber material filtration system
- The filter material used on metal sieve filtration was fine metal fiber of SUS316L-type overlapped with non-woven fabric. This material has a representatively strong mechanical strength and high filtration efficiency with low filtration resistance to capture residuals, reducing SS and BOD from sewage/wastewater treatment facility effluent; and treating wastewater reclamation,circulation water in industrial water and fiber recovery in paper plant that required to separate micro fiber by filter cloth. The size of filtration was adjustable at sintering process, multiple type of filter media was able to produce.

② Installation of rotating filtration screen to prevent partial obstructions
- Each metal sieve filtration module that was in disc-shape assembled at center pipe was operated in rotating screen to minimize exerted pressure on filtration and prevent partial obstruction on sieve filtration surface. To rotate filtration module, filtering screen was increased with filtration time period and also increased treatment quantity by suppressing filtration resistance. A filter unit consisting of rotating screen was easily attached or detached, if needed, correction or unit change was untroubled.

③ Spontaneous cleaning process for non-stop operation of filtration and backwashing
- The backwashing pressurized water nozzle was installed to diffuse water to the upper portion of exterior to interior direction, filtration and backwashing occur continuously. In addition, by maintaining a constant filter resistance, the treatment quantity was suppressed; durability, corrosion resistance, durability of abrasion and mechanical characteristic showed excellent result as backwashing was possible with a pressure of as high as 5㎏/㎠ ~ 8㎏/㎠. Recovery was higly obtained with low backwashing quantity. Residuals filtered by high pressurized backwashing transported to assembly process, this unit process improved the treatment quantity but also extended the filter life-cycle.

(2) Fiber Filtration Installation
(a) Result
- Test-bed for filtration (1,000ton/day) was set in Moonbal basin, Paju Book City in March 2011 and the monitoring was started from April 2011.
- The analysis of four(4) parameters, COD, SS, T-N, T-P, were performed, and the result was fluctuated depending on increase rainfall in reservoir. However, three (3) parameters except COD were removed over 75%, and SS over 80%.
- The Test-bed was removed as requested by Paju City in 2014, when the project was completed.

(b) Characteristic of fabric filtration system
- Effective removal of SS using highly-densed fabric filtration by separating solid and liquid
- Minimize head gauge by gravity filtration and do not need the extra system to make pressurized system
- Release of accumulated SS on disc interior by Guide Plate
- Uniform cleaning on filtration surface by movable routine backwashing exercise
- Prevention of filtration damage by double-sieve application and durability increase
- Stable treatment for low weighing material

(3) Spiral pre-treatment facility
- Due to water pressure, water inflow follows spiral plate raising swirling, flowing in spiral direction to exterior by centrifugal and centripetal forces, eventually removing impurities that were removed from inflow water.

(4) Installation of impurities removal
- The suspended solids removal system by natural stream flow

(5) Highly efficient phosphorus treatment facility
- The system that was to prevent stream eutrophication and retain ecological reclamation water for treating phosphorous to conserve algae
- Maximize phosphorous treatment efficiency by multiple filtration system of Jet-mixer and Jet-filter

b. Obtain intellectual property
(1) Wastewater treatment system by filteration
- Several wires overlapped rotating sieve filtration in cylinder-shape incorporated with high frequency, residuals filtered in sewage/wastewater including suspended solids, and sludges were decreased that were attached on surface of filter to improve sewage/wastewater treatment capacity. Pressurized water nozzle diffused on surface of filter separated impurities attached on surface and detached materials were assembled to vaccum suction cleaning facility, sewage/wastewater treatment process made efficient filter cleaning ability and improved treatment quantity.
Different size of pore overlapped wires incorporated with high frequency cylinder-shaped filter will reduce maintenance cost as several different pore size wires were overlapped.

(2) High efficient phosphorous treatment facility
- Treated effluent from sewage treatment facility was flowed in and inflow was treated to remove phosphorous by high efficient phosphorous treatment material as well as Jet-mixer and Jet-fileter. In addition, BOD, COD, SS were treated to reach satisfactory reduction to discharging to natural stream,

(3) Filtration sieve unit in wastewater treatment
- Wastewater filtration sieve unit was designed to use highly-densed filter for effective suspended solids removal. This densed filter had advantage of durability and prevention of filter damage by backflow.
In addition, highly-densed filter was supported by wire sieve overlap, increasing durability.

(4) Phosphorous removal in wastewater by zirconium ferrate rechargeable cartrige and recovery system
- Treated water as discharging to the river containing phosphorous was absorbed by zirconium ferrate pad, removal of phosphorous will provide clean water to public water resource. Phosphorous collecting technique was improved by this technique and collected phosphorous was recycled as phosphorous resource.

(5) Portable algae removal system in retained water
- Suspended solids on lake, pond or on surface water suction facility were sent to filtration system. Treated water was discharged to lake and pond again, increasing reclamation of surface water quality.
In addition, only surface materials including algae and suspended solids were selected to vaccum suction, eventually filtered becoming simple and economical system. The rotating screen system prevented a partial obstruction in the system operation, a unit of filter was consisted to attach or detach to present easy maintenance.

(6) Filtration system to prevent filter diffusion and efficient filter overlapping system
- By weight or gravity, filter and bachwashing increased disturbance of filtration decreasing filteration efficienty. In addition, backwashing prevents filters overlapping one another, and removes accumulated inpurity materials to maintenance benefit.

(7) Filtration system using metal filter
- Filtration using metal filter was designed to reduce inflow overloads on filter system. Comparably larger particles of solids in sewage/wastewater was treated separately with filtering, increasing filter’s life-cycle.
In addition, this metal filtration maintain reasonable water level increase operational efficiency.

c. Certification of new environmental technology
· Initial rainfall treatment facility using inclination plate and EVA filtration
- The system is designed as hierarchical order of sedimentation-filtration. The system is to receive water at the bottom increasing level on inclination plate, resulting heavy particle sedimentation. Upper portion was through filtration to remove fine and organic material.

(1) Sedimentation/filtration process – Continuous treatment
- Sediments in inclinated plant and filtration at upper portion filtration was to remove suspended solids and organic materials in initial rainfall.
- Increase of water at the bottom decreases the inclination plate by sedimentation, water at upper portion was through EVA filtration.
- The inclination plate angle is adjustable depending on inflow quality

(2) Backwashing process
- Impurities stuck in between filters were removed by continuous treated water and air-washing
- High pressurized water cleaning to reduce cleaning quantity and efficient backwashing by filtration mixture and air-washing
- Sequential filtration washing by portable washing system with non-stop operation
- Automated operation and treated water is used as backwashing resulting no backwashing is needed

(3) Cleaning inclination plate (after heavy rainfall)
- Improve filtration efficiency by cleaning inclination plate and discharge of sludge
- Inclination plate by angle adjustment performs routinely to remove sedimentation on plate and filters.
- Existing sludge collection facility is reused to discharge sludge sedimentation in sewage treatment facility 1st sedimentation tank
- Depending on site condition, suction release facility of siphon-type or reservoir cleaning (tipping bucket) are applicable.

2. Development of Decision Support System and Water Quality Control System for Ecological Rehabilitation
Main research results of this year are as follows:
○ Optimum management technique of ecological water resources
○ Development of water quality and quantity monitoring techniques for the ecological river restoration
○ Decision techniques of optimum flow rate for preservation of ecological water quality
○ Development of decision support system(EcoR3-DSS ver.2.0) for ecological water resources linked with river water quality simulation tools
○ Foundation of water quality and quantity DB of flagship for the most decision support for ecological water resources
○ Application planning of decision support system for ecological water resources(EcoR3-DSS) at Test Bed and Pilot Program

3. Development of decentralized water supply technology for ecological restoration of river biota
○「Water supply technology using green roof」
- Blast furnace slag aggregate and hydrophilic fiber, blast furnace slag cement, Loess mixed with lightweight block was developed for green roof. This product is applied the urban area building rooftop of the water quality can be secured. Also, effective reduction in the urban heat island.
○ 「Water supply technology using vegetation filtration reservoir」
- This technology is increase the infiltration rate and reduced contamination of the stormwater runoff. It can be applied to the river levee, stored water supplied to the river.

( 출처 : SUMMARY )

목차 Contents

• 표지 ... 1
• 최종보고서 제출서 ... 2
• 제 출 문 ... 4
• 요 약 서 ... 6
• 요 약 문 ... 16
• SUMMARY ... 36
• 목차 ... 46
• 표목차 ... 48
• 그림목차 ... 55
• 제 1 장 서 론 ... 62
• 제1절 연구개발과제의 개요 ... 64
• 1. 연구개발의 목적 및 필요성 ... 64
• 2. 연구개발 기술의 차별성 ... 66
• 제2절 연구개발의 국내외 현황 ... 79
• 제3절 연구개발의 내용 및 범위 ... 117
• 1. 연구개발의 최종목표 ... 117
• 2. 연도별 연구개발 목표 및 평가방법 ... 118
• 3. 연도별 추진체계 ... 123
• 제 2 장 연구개발 수행내용 및 결과 ... 128
• 제1절 연구개발 결과 및 토의 ... 130
• 총괄기관 : 코오롱워터앤에너지(주) ... 130
• 1세부 : 한국건설기술연구원 ... 358
• 2세부 : ㈜자연과환경 ... 406
• 제2절 연구개발 결과 요약 ... 446
• 총괄기관 : 코오롱워터앤에너지(주) ... 446
• 1세부 : 한국건설기술연구원 ... 452
• 2세부 : ㈜자연과환경 ... 454
• 제 3 장 목표달성도 및 관련분야 기여도 ... 456
• 제1절 연도별 연구개발목표의 달성도 ... 458
• 1. 총괄기관 : 코오롱워터앤에너지(주) ... 458
• 2. 1세부 : 한국건설기술연구원 ... 460
• 3. 2세부 : (주)자연과 환경 ... 462
• 제2절 관련분야의 기술발전 기여도(환경적 성과 포함) ... 464
• 제 4 장 연구개발결과의 활용계획 등 ... 466
• 제1절 연구개발 결과의 활용계획 ... 468
• 1. 총괄기관 : 코오롱워터앤에너지(주) ... 468
• 2. 1세부 : 한국건설기술연구원 ... 469
• 3. 2세부 : ㈜자연과환경 ... 470
• 제2절 연구개발과정에서 수집한 해외 과학기술정보 ... 471
• 제3절 연구개발 결과의 보안등급 ... 494
• 제4절 NTIS에 등록한 연구시설·장비현 ... 495
• 제 5 장 참고문헌 ... 496
• 부 록 ... 510
• 끝페이지 ... 556