• Research article

    Composting of livestock manure using complex functional microbes with nitrogen utilization and enzyme-active bacteria

    질소이용 및 효소활성의 기능성 복합미생물을 이용한 축분퇴비화

    Yan-Qing Wang, Jae-Hyeong Shin, Sang-Min Park, Soo-Ki Kim

    왕옌칭, 신재형, 박상민, 김수기

    This research focused on the use of composite microbial preparations, derived from the complex strains (Alcaligenes aquatilis, Rhodococcus jostii, … + READ MORE
    This research focused on the use of composite microbial preparations, derived from the complex strains (Alcaligenes aquatilis, Rhodococcus jostii, Alcaligenes faecalis, Lysinibacillus varians, Bacillus megaterium, Bacillus velezensis, Bacillus subtilis, Glutamicibacter arilaitensis, Cupriavidus nectar, Bacillus licheniformis, Pediococcus acidilactici and Bacillus sp. SinR4), in compost production in cold regions. These strains, isolated from livestock manure, compost, and soil, were examined for their heat stress resistance and antagonism. About 30 days after putting microorganisms in the compost (T), It showed that the treatment group had a higher average temperature than the control, with the peaks being 60.1°C and 58.9°C, respectively. Moreover, the treatment group had less production of gases like ammonia, amine, and hydrogen sulfide, and a shorter deodorization time than the control group. The results suggest that the use of such composite microorganisms can enhance compost production by promoting temperature increase, reducing odorous gas production, and inhibiting thermal stress. - COLLAPSE
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    31 August 2023

  • Research article

    A study on analyzing the image influence factor of ‘centralized livestock manure management project’

    가축분뇨 공동자원화사업 이미지 영향 요인에 관한 연구

    Gab One Han, Seung Jee Hong, Jong Oui Park

    한갑원, 홍승지, 박종의

    This study analyzes the public’s perception of the Centralized Livestock Manure Management (CLMM) project in order to expand and revitalize the facilities … + READ MORE
    This study analyzes the public’s perception of the Centralized Livestock Manure Management (CLMM) project in order to expand and revitalize the facilities of the domestic CLMM project. In addition, the study was conducted to objectively analyze the causes and incidence of complaints in order to establish and provide data for revitalization an effective CLMM facility in the future. Therefore, from April 16 to May 18, 2018, a survey was conducted among the general public about the CLMM project, asking about the knowledge and information sources of the CLMM project, general awareness, image influence factors, complaint factors, image importance, image enhancement activity organizations, and demographics. A total of 300 surveys were conducted, and 287 were analyzed after excluding cases of insufficient survey responses. Based on analysis results, it is believed that when setting the direction of the project, considering the image impact of the CLMM project, the impact on other industries, economic growth, reduction of agricultural production cost, environmental friendliness and social service should be communicated to the local people when implementing the project, and the safety of the working environment, career development, creativity of work, cultural activities and contribution to social development should be considered based on objective data to communicate the image. In addition, the CLMM project should be promoted by public institutions, focusing on knowledge transfer about the project, the importance of their role, livestock manure Management policies, and solutions to environmental pollution such as livestock manure. The roles of other stakeholders are also described in the text. - COLLAPSE
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    31 August 2023

  • Research article

    Comparison of ventilation rate according to the lengths of air flow measurement device for measuring the ventilation rate from a pig barn

    돈사 환기량 측정용 풍량 측정 장치 길이에 따른 환기량 비교

    Okhwa Hwang, Joshua Nizel Halder, Junsu Park

    황옥화, 죠슈아 나이젤 할더, 박준수

    The length of air flow measurement device for measuring the ventilation rate from a pig barn is an factor that affects the … + READ MORE
    The length of air flow measurement device for measuring the ventilation rate from a pig barn is an factor that affects the estimation of ventilation rate. This study focused on ventilation rate comparison according to the length of air flow measurement device of hood-type. The pig barns (5 m × 8 m × 7 m) was installed an mechanically forced exhaust fan of chimney-type. The ventilation rate respectively was evaluated on 1) the device of length by a long (5 parts duct) or short (3 parts duct) and 2) whether the device was installed or not to a exhaust fan. At this time, there were also conducted in the condition of the presence or absence of a honeycomb duct, which was the last phase of the device. Both experiments were tested according to the operating rate of the exhaust fan (30, 50, 70, and 100%). The ventilation rate were lower in the long-length device than in the short-length from both experiments. In experiment 2, the reduction rate of ventilation rate compared with non-installed was higher in the long-length device than in the short-length. In conclusion, the findings confirmed that long-length device was caused the underestimate of ventilation rate. - COLLAPSE
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    31 August 2023

  • Research article

    A field survey of CO2 concentration and temperature both inside and outside vinyl greenhouse applied compost and liquid fertilizer

    가축분뇨 퇴액비가 시용된 비닐하우스의 내외부 CO2 농도와 온도 변화 실태 조사 연구

    Ji-Eun Byeon, Jin Soo Lim, Jong-Won Ryoo, Sun-Goo Hwang

    변지은, 임진수, 류종원, 황선구

    The areas of vinyl greenhouse have steadily grown in Korea. Climate condition is far from optimal inside vinyl greenhouses because of the … + READ MORE
    The areas of vinyl greenhouse have steadily grown in Korea. Climate condition is far from optimal inside vinyl greenhouses because of the limited ventilation and lack of cooling and heating. Carbon dioxide was more than 50% higher than pre-industrial levels. Agricultural activities are estimated to account for about 13.5% of the total greenhouse gas. The objective of this study was to predict the CO2 concentration and temperature in the inside and outside of vinyl greenhouse applied compost and liquid fertilizer. In this study, we compared the CO2 concentration and temperatures inside and outside greenhouses. The investigation was performed in 54 vinyl greenhouses located in Yeoju and Boryeong regions, Korea. The CO2 concentration inside and outside of vinyl greenhouse were measured in the period from 2021 to 2022. The mean CO2 concentration inside a greenhouse in the Yeoju and Boryeong was 499.6 and 516.2 ppm, respectively. Inside the greenhouse, the highest mean CO2 concentration had values of 600.8 ppm, and the minimum level of CO2 was 477 ppm in Boyeong. The seasonal CO2 concentration was observed in March and April with a maximum occurrence and in July-August with a minimum occurrence. The average CO2 concentration of inside the vinyl greenhouse is 10.1 ppm higher than that of outside atmospheric CO2 concentration. During summer season, inside temperatures was high as 31.9~33.7°C. The difference between the inside and outside temperatures of vinyl house was around 1~3°C. Therefore monitoring of CO2 concentration and temperature of vinyl greenhouse is needed. - COLLAPSE
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    31 August 2023
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