A5101402886- Wastewater Treatment and Nitrogen Removal
- Phosphorus and nutrient management
- Odor and Emission Control Technologies
- Agriculture, Soil, Plant Science
- Constructed Wetlands for Wastewater Treatment
- Composting and Vermicomposting Techniques
- Recycling and Waste Management Techniques
- Catalytic Processes in Materials Science
- Radioactive element chemistry and processing
- Fire effects on ecosystems
- Nuclear and radioactivity studies
- Conservation Techniques and Studies
- Consumer Perception and Purchasing Behavior
- Nanomaterials for catalytic reactions
- Viral Infectious Diseases and Gene Expression in Insects
- Catalysts for Methane Reforming
- Thermochemical Biomass Conversion Processes
- Ecology and Conservation Studies
- Copyright and Intellectual Property
- Ammonia Synthesis and Nitrogen Reduction
- Chemical Synthesis and Characterization
- Radioactive contamination and transfer
- Energy and Environmental Systems
- Food Quality and Safety Studies
- Cultural and Historical Studies
Kangwon National University
2008-2023
Korea Atomic Energy Research Institute
2016-2017
University of Hawaiʻi at Mānoa
2002
Struvite recovered from waste streams is considered as a sustainable alternative to commercial phosphate (P) fertilizers manufactured P rock. In this study, struvite was swine wastewater and pre-treated air-dried material (AM), microwave irradiated (MM), oven-dried (OM), incinerated (IM) reduce the moisture content. Based on their solubility crystalline nature, AM IM were selected for further experiments. The nutrient leaching loss fertilizing value of evaluated in comparison fused...
Struvite crystallization using fluidized bed reactors (FBRs) is one of the most commonly used methods for nutrient recovery from different waste streams. However, struvite swine wastewater containing much higher solids FBR has not been studied extensively. In this study, we therefore designed and optimized key operating conditions parameters, i.e., pH (9.0, 9.5, 10.0), circulation rate (CR) (1.5, 3.0, 4.5 L/Lreactor·h), hydraulic retention time (HRT) (1, 3, 5 h) to ensure efficient removal...
In this study, a novel treatment approach combining biological treatment, struvite crystallization, and electrochemical was developed its efficiency for the simultaneous removal of pollutants recovery nutrients from high strength swine wastewater (SWW) verified. For all parameters, maximum efficiencies in lab-scale test were obtained range 93.0-98.7% except total solids (TS) (79.4%). Farm-scale process showed overall nitrogen (TN), phosphorus (TP), soluble organic carbon (sTOC), color as...
In this study, a practical decontamination process was developed to remove uranium from gravel using soil washing method. The effects of critical parameters including particle size, H2SO4 concentration, temperature, and reaction time on removal were evaluated. optimal condition for two-stage found be size 1-2 mm, 1.0 M H2SO4, temperature 60°C, 3 h, which satisfied the required concentration self-disposal. Furthermore, most extracted removed waste solution by precipitation, implying that...
The agricultural sector is considered one of the major sources greenhouse gas (GHG) emissions globally. livestock industry as a significant contributor, accounting for about 18% GHG measured in carbon dioxide (CO2) equivalent from practices. Depending on farming practices and climatic conditions, GHGs such methane (CH4) nitrous oxide (N2O) agriculture can vary significantly. Country-specific emission factors are, therefore, needed precise estimation to avoid uncertainties. This study was...
In this study, an attempt was made to develop a real-time control strategy using oxidation–reduction potential (ORP) and pH (mV) time profiles for the efficient operation of bio-liquor circulation system (BCS) in swine farms its effectiveness reducing odor emission through improving manure properties slurry pit evaluated. The lab-scale BCS used study comprised bioreactor pit. operated sequence inflow → anoxic phase aerobic improvement elucidated by comparing results (circulation type, CT)...
Apart from using as fertilizer for plants, the application of struvite may be expanded to animal feed industries through proper pre-treatment. This study aimed investigate safety and efficacy pre-treated (microwave irradiated (MS) incinerated (IS)) in feeds. For assessment, an vivo toxicity experiment thirty female Sprague Dawley rats (average body weight (BW) 200 ± 10 g) was conducted. The were randomly divided into five groups, including a control. Based on BW, MS IS applied daily by oral...
Due to rapid economic return, mixed crop-swine farming systems in Korea have become more intensive. Intensive practices often cause nutrient surpluses and lead environmental pollution. Nutrient budgets can be used evaluate the impact as a regulatory policy instrument for management. This study was conducted select budgeting approach applicable farms suggest an effective manure treatment method reduce on-farm production.In this study, we compared current ideal gross balance (GNB) approaches...
The objective of this study was to evaluate the feasibility reutilizing phosphorus (P) recovered as struvite from swine wastewater an alternative commercial P sources in broiler feed. pre-treated microwave irradiated (MS) and incinerated (IS) reduce NH4-N concentration before application. A preliminary on growth performance blood metabolites chickens then performed assess effect MS IS by comparing with monobasic dicalcium phosphate (MDCP, control). total 204 male Ross 308 (mean body weight...
The aim of this study was to investigate the performance developed real-time controlled bio-liquor circulation system (BCS) on a farm-scale optimize bioreactor operation for manure treatment, and subsequently reduce both manure-related malodor greenhouse gas (GHG) emissions from slurry pits. BCS operated sequentially as per swine inflow (anoxic, aerobic, settling) pit. duration each operational phase self-adjusted in using novel algorithm detecting control point oxidation-reduction potential...
The livestock industry, especially swine production, has been pressurized by vicinity complaints about odor in Korea. Therefore, a lot of effort undertaken regarding reducing the emissions from pigsties, widely carried out and washing manure slurry pit liquid-phase compost particularly spotlighted with outstanding performance reduction. However, such called bio-liquor circulation system (BCS) controlled timer designated reaction time, which cannot guarantee performance. This research...
50년간 우리나라의 산불발생원인은 시대에 상관없이 입산자실화에 의한 산불이 가장 많이 발생하였다. '60-'70년대는 입산자실화외에 성묘객부주의, 어린이불장난, 논밭두렁태우기, 쓰레기소각, 담뱃불순 이었으나, '80년대 이후에는 담뱃불, 어린이불장난 순으로 나타났다. 입산자실화를 제외하고 성묘객부주의와 어린이불장난에 산불발생건수는 지속적으로 감소하고 있으며 반면에, 담뱃불에 증가하고 있는 것으로 논밭두렁태우기와 쓰레기소각에 산불은 '90년대 쓰레기 종량제 실시이후 있으며, '70년대 이후 농산촌 어린이 인구수의 급격한 감소에 함께 발생건수가 크게 감소하였다. 성묘객부주의에 산불발생건수가 감소하는 것은 매장에서 화장으로 분묘에서 납골당을 선호하는 장례문화의 변화가 산불발생건수의 많은 영향을 미친 판단된다. Over the past 50 years, causes of forest fire were mainly broken out by accidential mountain...
본 연구의 목적은 급변하는 디지털 환경에서 유아동의 스마트폰 과의존을 측정하기 위한 관찰자 척도를 개발하고 타당화하는 것이다. 이를 위해 문헌 분석과 전문가 FGI를 통해 과의존의 하위요인을 조절력 상실, 현저성, 문제적 결과로 구성하였으며, 결과는 신체건강, 정신건강, 대인관계 맥락, 생산성으로 세분화하였다. 예비조사와 본조사를 거쳐 총 20문항의 최종 개발하였으며, 신뢰도와 타당도 검증결과 양호한 수준으로 나타났다. 또한 z 점수를 활용한 규준 설정과 ROC 분석, 수정된 Angoff 방법을 일반군, 잠재적 위험군, 고위험군의 분류 기준점을 마련하였다. 일반군은 사용에 특별한 어려움이 없는 상태로, 스마트폰을 적절히 조절하여 사용하며 일상생활에 지장이 수준이다. 반면 위험군은 사용 조절력이 약화되어 약속 시간을 어기거나 늘려달라고 요구하는 등 신체적·정신적 문제가 나타나기 시작하는 상태이다. 고위험군은 대한 통제력을 상실하여 외에 다른 활동을 거의 하지 않으며, 주변...
Recently, circulating biologically treated manure in slurry pits has been used as an odor reduction technology, but few successful results have reported, due to the lack of proper control strategies for bioreactors. This study was conducted investigate performance developed real-time controlled bio-liquor circulation system (BCS) at farm scale. The BCS operated sequentially per swine inflow (anoxic, aerobic, and settling) pit. Each operational phase self-adjusted using a novel algorithm...