초록 ▼

연구개발 결과
1. 강릉시 녹색도시사업 연계를 위한 하수 처리수 및 빗물 연계 재이용 플랜트 시범사업 계획
(1) 하수 처리수 및 빗물 재이용 플랜트 기술 적용
ㆍ실증플랜트 대상지(강릉종합운동장) 및 하수 원수 확보 방안(교동대림아파트 오수 차집) 결정
ㆍ용수 공급 계획 (운동장 잔디 공급수, 생태습지 유지용수, 화장실 세정용수, 도로 살수용수)
ㆍ분리막 생물반응조 용량 결정(HRT 7.5시간)
ㆍ하수처리공정 설계 및 시설(건축물, 관로, 기계설비, 제어/계측) 시공
ㆍ지붕면(초기우수처리장치,

연구개발 결과
1. 강릉시 녹색도시사업 연계를 위한 하수 처리수 및 빗물 연계 재이용 플랜트 시범사업 계획
(1) 하수 처리수 및 빗물 재이용 플랜트 기술 적용
ㆍ실증플랜트 대상지(강릉종합운동장) 및 하수 원수 확보 방안(교동대림아파트 오수 차집) 결정
ㆍ용수 공급 계획 (운동장 잔디 공급수, 생태습지 유지용수, 화장실 세정용수, 도로 살수용수)
ㆍ분리막 생물반응조 용량 결정(HRT 7.5시간)
ㆍ하수처리공정 설계 및 시설(건축물, 관로, 기계설비, 제어/계측) 시공
ㆍ지붕면(초기우수처리장치, 저류조, 금속막, 빗물처리수조, 공급시설) 및 도로/녹지면(빗물집수처리시설, 저류조, 공급시설) 빗물이용시설 시공
ㆍ생태습지 설계(HRT 5일) 및 관련시설(수체부, 경계석, 식물섬, 식재) 시공
(2) 빗물 및 하수 처리수의 연계활용 설계 및 운영 기술 개발
ㆍ집수면 선정(게이트볼경기장 지붕면, 생태습지 인근 도로/녹지면) 및 저류조 용량(지붕 계통 60m3, 도로/녹지면 계통 20m3) 결정
ㆍ입체형 빗물관리기술 계획/설계(지하저류조/생태습지 연계), 다기능녹지집수 시스템 및 스마트 처리기술 계획/설계(집수부, 여재층 제원 결정), 관로형 저류시설 계획/설계, 물순환 환경포장 계획/설계(도로살수 시설), 시스템 세부설계(초기우수처리장치, 금속막, 펌프류)

Abstract ▼

Ⅳ. Outcomes
1. A application of recycling plant technologies
ㆍA Survey of the site of the demo-plant (Green Street, Green Square) : selection of demo-plant site(Gangneung Sports Complex, the front of gateball facility), Decision of way to obtain sewage(collection of sewage from Gyo-dong Daelim

Ⅳ. Outcomes
1. A application of recycling plant technologies
ㆍA Survey of the site of the demo-plant (Green Street, Green Square) : selection of demo-plant site(Gangneung Sports Complex, the front of gateball facility), Decision of way to obtain sewage(collection of sewage from Gyo-dong Daelim Apartment)
ㆍA determine of the pilot plant process : planning to supply grass water, ecological artificial wetland water, toilet cleaning water, road water, irrigation water from treated sewer water from MBR and stromwater from root and road/grass surface
ㆍSystems Planning and design of sewage membrane treatment system (KIMAS) : a decision of volume of MBR (HRT 7.5 hr)
ㆍInstalling the membrane system for wastewater treatment (100㎥/day) : design of process of MBR and construction of facilities(buildings, pipelines, machinery, monitoring & control systems)
ㆍInstalling the pilot plant for the rainwater management : a construction of stormwater utilizing system; root surface system(a facility for initial stormwater, stormwater storage tank, metal membrane, treated stomwater tank, supply facilities) and road/grass surface system(multi-functional catchment system, underground storage tank, supply facilities)
ㆍInstalling the Gyeongpo District utilizing facilities(wetlands etc.) : a design of artificial wetland(HRT 5days) and a construction of related facilities(pond, rocks, isle of plants, plantings)
ㆍA development of web-based smart operating software(HMI system) : an implementaion of control & monitoring system(HMI) in demo-plant
ㆍA development of process management system for combined treated sewer and stromwater recycling : Cpmposition of operation & management system(web-based HMI, simulation program of process, data/analysis)

2. A design of utilization of blending stormwater and treated sewer water and a development of operation technologies
ㆍA planning and design of stormwater collecting face by the stormwater management program(RainCity) : a decision of catchment surface of stormwater(roof surface of gateball stadium, road/grass surface around artificial wetland) and volume of rainwater storage tank(60㎥ of roof surface system, 20㎥ of road/grass surface system)
ㆍAn application of technologies of stormwater management system
- A planning and design of stereoscopic stormwater management technology(a connection of underground store tank and artificial ecological wetland)
- A planning and design of multi-functional catchment system and smart treatment technologies(deciding design specifications of the catchment facilities and the media layers)
- A planning and design of detention facilities shaped pipeline
- A planning and design of environmental pavement typed of water circulation(water supplying facilities to road)
- Specific design of system(the treatment facility for initial stormwater, metal membrane, pumps)
ㆍSetting methods of the combined utilization of stromwater and treated sewer water : mode of operation for rainfall forecasting, dilution of storage water, alternative appliacation of supplying water

3. An appilcation of stainless steel membrane system and a development of optical TiO₂ membrane embedded nanotubes
ㆍManufacturing a functional TiO₂ membrane by anodic oxidation
- The anodizing process time has low impact but the applied voltage has high impact
- In order to promote the photocatalytic activity, heat treatment over 450 °C after anodizing is required.
ㆍNDMA removal technologies for the unit process
- The removal efficiencies of general membrane process and only UV system are 40% and 89%, respectively, but the removal efficiency of UV/TiO₂ process is 100%.
- The initial 1 to 30 mg/L of NDMA treatment efficiency is over 99% and the efficiencies increase when the UV intensity increases.
- The efficiency of NDMA degradation was high and the production of intermediate by-product was increased at the acidic range.

4. Project proposal through operating and demonstrating pilot treated sewer water plant
ㆍOperations of the pilot plant and data analysis : Analysis of amounts of treated sewer water(82.6㎥/day), amounts of utilized treated sewer water(88.7㎥/day of total amounts, 72.1% of grass water, 25.2% of wetland water, 0.9% of temporary grass field water, 1.9% of washing water), Utilization of treated sewer water for grass growth
ㆍSetting of the smart operation system of combinedly utilizing treated sewer water and stromwater : application of process simulation system(connected with HMI data, assistance of deciding operation by simulation)
ㆍEvaluations of operation factors and efficiencies of membrane process : Analysis of water qualities of treated sewer water(Compliance with standards for water reuse), analysis of operation factors of wastewater treatment process(temperature of aerobic basin was over 18°C, pH 6.5~7.0, 5,000~8,000mg/L of microbial concentration)
ㆍA derivation of the design criteria of the treated sewer water recycling plant : design criteria of volume of membrane bioreactor(HRT 7.5hr), design criteria of membrane module, the list and specifications of facilities of the plant for reusing treated sewer water
ㆍAnalysis of cost-effectiveness and feasibility of the recycling plant : construction cost(45,112,300 won/(100m3/day)), operation cost(5,267,478 won/year), analysis of benefit & cost(benefit - cost : 31,665,297 won/year)
ㆍProject proposal through demonstrating the results : the status of planning Pyeongchang Winter Olympic facilities(3 facilities are ready to build near the Gangneung sports complex), Project proposal of water recycling facilities(application of water recycling facilities, utilization of stormwater, the amounts of 11,795㎥/year, 400㎥/year of water recycling facility, building artificial pond, the additional cost will be 2,000 million won)

5. Evaluations and project proposal of the stormawater retention system for combined operation
ㆍOperation and maintenance of the stormawater retention system for combined operation : analysis of rainfall catchment efficiency(97% of winter season, 83.9% of summer season), status of water qualities of stormwater in storage tank (compliance with standards for use - electrical conductivity, pH, COD, T-N, T-P, turbidity)
ㆍEvaluations of performance of stormwater management plant and retrofitting : a compliment of the inlet of multi-functional catchment system(increase the catchment quantity), retrofitting pipeline retention facilities(level control)
ㆍPerformance evaluation and commercialization of multi-functional catchment system : an assesment of catchment efficiencies(82.0%), an assesment of removing pollutants(in initial rainfall)
ㆍPerformance evaluation and commercialization of stereoscopic stormwater management technology and pipeline retention facilities : an assessment of system performance(design of system and decreasing run-off(24.8㎥ at 84.8mm/day of rainfall), an assessment of pipeline retention facilities(quantity of supplied water(to road 36.8%, to grass 11.5%, to wetland 51.7%), effects of dilution, decrease the ground temperature by watering)
ㆍCommercialization of the smart nutrient reduction technologies for the utilization of recreation water : smart treatment technologies(the management of T-N & T-P by circulating wetland water)
ㆍProject proposal of stormwater retention system combined with treated sewer water : methods of application for Pyeongchang winter olympic new sports complex

6. Application of metal membrane on field system for treated sewer water and stormwater recycling
ㆍPermeation characteristics and water qualities of light-sensitized TiO₂ metal membrane
- The size of TiO₂ nano particles was 372nm, zeta potential was -22.7mV and various sizes of aggregates were formed.
- The amounts of generated reactive oxygen species increased linearly when TiO₂ concentration was increased.
ㆍThe treatment of stormwater using a metal membrane of anode oxidation : The amounts of generated reactive oxygen species increased when metal oxidants and TiO₂ were reacted at the same time.
ㆍOxidation of organic compounds by metal oxidants and TiO₂ particles : The removal efficiency by photocatalytic reaction was increased when TiO₂ concentrations were increased or initial concentrations of organic compounds were decreased(5 μM of 4CBA could be degraded by 90% in 2 hours at the condition of 25 mg/L of TiO₂).