가정용 소형 퇴비화용기에 의한 부엌쓰레기의 분산식 퇴비화 - Ⅴ. 현장조건에서 퇴비화 -

서정윤,주우홍 ( Jeoung Yoon Seo,Woo Hong Joo ) 한국환경농학회 1996 한국환경농학회지 Vol.15 No.2

This study was conducted to investigate the possibility of composting of household garbage. The composter with the double layer walls was operated for 60 days in each season. The following results were obtained at the end of the experiment, if the time was not specified. 1) The maximum temperature was 31℃ in spring, 36℃ in summer and 50℃ in winter. 2) The mass was reduced to an average of 58.5%. 3) pH values of the compost were 8.21 in spring, 8.29 in summer and 7.94 in winter. 4) The ash contents were 55.8% in spring, 57% in summer and 73.8% in winter. 5) The nitrogen contents were in the range of 0.2∼5.8%. Its values were the highest in winter and the lowest in summer. 6) Inorganic contents of the compost were in the range of : P₂O_5 ; 1.5∼4.41%, K₂O ; 0.02∼1.31%, CaO 0.13∼1.68% and MgO 0.05∼1.22%. 7) Heavy metal contents of the compost were in the range of : Zn; 13∼89㎎/㎏, Cu; 4∼62㎎/㎏, Cd; 1∼21㎎/㎏, Pb; N.D.∼97㎎/㎏, Cr; N.D.∼37 and Hg; N.D.∼1.38㎎/㎏.

가정용 소형 발효용기에 의한 음식물쓰레기 퇴비화과정 중 질석의 첨가효과

서정윤,허종수,한종필,박주원,황면훈,Seo, Jeoung-Yoon,Heo, Jong-Soo,Han, Jong-phil,Park, Ju-Won,Hwang, Myun-Hoon 유기성자원학회 2000 유기물자원화 Vol.8 No.3

Compostable household wastes(mainly food residues) were composted in a small bin for 30 days, in which compostable household wastes were fed every day and mixed thoroughly under aerobic conditions. Three small bins were employed. In the first bin only recycled compost was composted, in the second, compostable household wastes with recycled compost, and in the third compostable household wastes with recycled compost and vermiculture. The correct decomposition rate of each composting material was calculated during composting. Total reduced rate of the weight after 30 days was 57.32% when composting the compostable household wastes with recycled compost, and 64.71% when composting them with recycled compost and vermiculite. In the case of composting the compostable household wastes with the recycled compost, the total weight reduction rate for a day was 6.81% and the total decomposition rate 6.81%. Their difference was not great. But in the case calculated with only compostable household wastes the total weight reduction rate was 56.34% and the decomposition 6.79%. When compostable household wastes were composted with the recycled compost and vermiculite, the total weight reduction rate was 64.99% and the decomposition rate 1.48%, but the total weight reduction 4.36% and the decomposition rate 35.46% when calculated with only compostable household wastes. MgO, $K_2O$ and Cr concentrations in the composting mixture during the early composting time were higher when composted with vermiculite than without it, but organic matter, CaO, NaCl, and $P_2O_5$ concentrations were contrarily diluted because of their lower concentration of vermiculite when compostable household wastes were composted with vermiculite.

가정용 소형 퇴비화용기에 의한 부엌쓰레기의 분산식 퇴비화 - Ⅲ. 실험실조건에서 이중벽 소형 용기에 의한 퇴비화 연구 -

서정윤,주우홍 ( Jeoung Yoon Seo,Woo Hong Joo ) 한국환경농학회 1995 한국환경농학회지 Vol.14 No.2

This study was conducted to obtain practical information on the efficient drying of animal manure under the sunny dry condition. The effects of the height of manure pile (5, 10, 15, and 20㎝), stirring times (0, 1, 2, and 4 times/day), the addition of dried manure (30%, w/w), and the type of drying bed on the removal of water from fresh pig manure were investigated in a plastic house. Pig manure was dried very well by lowering the height of manure pile and the drying efficiency was the highest at 10㎝ height. Water evaporation rate was the greatest at the twice-stirring per day treatment. The addition of dried manure as bulking material enhanced the water evaporation rate of wet pig manure. The amounts of water removed for 19 days under the condition of 10㎝ height of manure pile and twice-stirring in spring, summer, autumn and winter were 75.6, 73.3, 54.6 and 32.6㎏/1.2㎡, respectively.

수직 흐름 제올라이트 갈대 여과상에 의한 생활하수 처리

서정윤(Jeoung-Yoon Seo) 한국생물공학회 2007 KSBB Journal Vol.22 No.2

수평 흐름 제올라이트 갈대 여과상에 의한 인공하수 처리

서정윤(Jeoung-Yoon Seo),최민수(Min Soo Choi) 한국생물공학회 2003 KSBB Journal Vol.18 No.6

연구논문 : 경삼남도 황강 수계의 식물상과 식생의 특성

서정윤 ( Jeoung Yoon Seo ),박경훈 ( Kyung Hun Park ),유주한 ( Ju Han You ) 한국환경복원기술학회(구 한국환경복원녹화기술학회) 2013 한국환경복원기술학회지 Vol.16 No.1

This study is carried out to offer raw data and establish strategy for conservation and restoration of river ecosystem by objective surveying and analysing the flora and vegetation distributed in Hwang river, Gyeongsangnam-do. The flora identified in this site were 406taxa including 95 families, 252 genera, 360 species, 3 subspecies, 40 varieties and 3 forms. The rare plants were 3taxa including Sagittaria sagittifolia subsp. leucopetala, Hydrocharis dubia and Acorus calamus. The endemic plants were 4taxa including Populus ronenriglandu1osa, Salix koriyanagi, Paulownia coreana and Weigela subsessilis. The specific plants by floristic region were 17taxa including Salix siuzeWi, Poncirus rrjfoliara, Poainogeton, naackianus and so forth. The naturalized plants were 39taxa including Phytolacce americana, C1enopodiun glaucam, Lepidium virginicum, Oenothera enythrosepala, Xanthium canadense, Lolium inultijiorurn and so forth. The invasive alien plants were Ambrosia arre,nisijfolia and Ambrosia trfida. The whole NI and UI were each 9.6% and 13.9%. The hydrophytes were 27 axa including Marsilea quadrfo1ia, Nvmphaea ret ragona, C`erarophvlluin deinersurn, Trapa japonica and so forth. In the results of growth forms of the hydrophytes, emergent species were 14taxa, 3taxa of floating-leaved species, 4taxa of free-floating species and 6taxa of submerged species. The dominant vegetations were Salix spp. community, Miscanthus sacchariflorus community, Phragmites japonica community and Phragmites communis community.

수평 흐름 제올라이트 갈대 여과상에 의한 생활하수 처리

서정윤(Jeoung-Yoon Seo),김은호(Ean Ho Kim) 한국생물공학회 2006 KSBB Journal Vol.21 No.1

음식쓰레기 1차 부숙퇴비의 숙성과정중 상태변화

서정윤 ( Jeoung Yoon Seo ) 한국환경농학회 1997 한국환경농학회지 Vol.16 No.2

The fresh food waste compost, which was composted in a small bin for average one month, was cured in a pile in the field for seven months. The pile was turned once a month. The various components of the compost were investigated for the curing period. The maximun temperature rised to 65℃ after curing of four months. The moisture content of the compost droped to 61.7% after twelve months. After that, the rainfall affected very much the moisture content of the compost. pH of the compost increased gradually to 8.92 for curing. Ash content rised continually to 60.5% for curing. However, it did not exceed 25% ash content, which is the by-product limit value. The accumulation of the inorganic components occured and most of the heavy matals except for Cd generally were accumulated as curing proceeded.

발효건조장치의 가동온도가 음식물쓰레기의 분해 및 이 · 화학성에 미치는영향

서정윤(Jeoung-Yoon Seo),박주원(Ju-Won Park),이영형(Young-Hyeung Lee) 유기성자원학회 2000 유기물자원화 Vol.8 No.1

음식물쓰레기 발효건조장치의 기동온도는발효물질의 분해속도및 발효물질의 이 화학성 뿐만아니라장치의 가동에 소요 되는에너지 %에 크게 영호E을미친다.따라서 한번에 lOOkg의 음식물쓰레기를발효건조시킬수있는시판되는발효건조기를사 용히여 가동온도를 35,45,55와 70 ℃에서 가동하면서 발효물질의 분해속도및 이 - 화학적 특성의 변화를조사하였다.분해속도는 35 0C와700C에서 가장빨랐으며 모든온도에서 기동초기 10시간내에 급격하게 분해되는비슷한양상을보였다.온도가높을 수록분해가 빨랐다.가통기간에 따른발효물질의 pH는가동온도 55"C와 700C에서 빠랙1 증7}하였다.발효물질의 질소함링연 가동기간에 따라별다른경향을나타내지 않았다.발효물질 중P2Ü5와CaO함량은기동기간에 따라증가하였으나MgO,K₂O와 NaO의함량은축적되지않았다. 구리의함량은 100mg/kg(건조물질함량)이었으며 Cd,pb및 G은분석한계이하이었다. This study was carried out to investigate the effects of operating temperatures on decomposition and physicho-chemical properties of household food wastes in a fermentation dlyer, which was manufactured by Samwoo Co. Ltd. The household food wastes of 100kg can be put and dried in this dryer at once. The experiments were performed at each temperatrure of 35oC, 45oC, 55C and 70C for two days respecrively. The samples taken at the fìxed rime were dried at 105 0C and analyzed to fìnd the decomposirion rate and the concemrarion of each subsrance. The results obrained were as foUows : The decomposition rare ar 35 and 70 0C was the highesr and showed the similar tendency during the expemnεmal period. The higher the operaring temperature was, 버e faster the water contem of 바1ε composting material reduced. pH value increased at the operating temperature of 55 and 700C and was higher than at the other operating remperanlfes. Nirrogen comem clid nor show any tendency during the experimental period. P20 5 and CaO content increased during the experimental period bur MgO, KzO and NaCI were not accumulated. Cu content based on dry matrer was in the ra.nge of ND ~ 100.4 mg/kg and Cd, Pb and Cr were nor detected.

음식쓰레기 퇴비화과정 충 중금속함량 변화

서정윤(Jeoung - Yoon Seo) 유기성자원학회 1996 유기물자원화 Vol.4 No.1

The heavy metal concentration in mixed and separately collected household food waste, and their compost during the composting period was analysed. The mixed and separately collected food waste had Cd content of 8 mg/kg in spring and its content of 13 mg/kg in winter respectively. Its content was higher than by-product compost limit value(5 mg Cd/kg). Cd concentration in separately collected food waste in a house was higher in January, February, April and May than by-product compost limit value (5 mg Cd/kg). When Cd concentration in the initial composting material was higher than 5 mg/kg, its concentration in the compost of household food waste during the composting period was higher than by-product compost limit value, but it was not accumulated in the compost during the composting period. Fly ash was added to separate\y collected household food waste to adjust its moisture content for composting. Its addition had moisture conditioning and Cd concentration reducing effect in the compost. The average one month composted fresh compost from the mixed collected household food waste was matured in a pile out of doors for 7 months with turning the pile once a month and its heavy metal concentration was examined. Accumulation of the heavy metals in the compost did not occur during the composting period, because they were washed out during the rainfall. 가정에서 분리수거한 쓰레기와 혼합쓰레기 및 퇴비화 과정중에 있는 쓰레기의 중금속 농도를 측정하였다. 카드융의 농도는 봄철에 8 mg/kg 쓰레기, 겨울철에 13 mg/kg 쓰레기였다. 중금속의 농도는 월별로 큰 차이를 보였으며 1 월과 2월,4월,5월에는 카드륨의 함량이 부산물 퇴비의 기준인 5 mg/kg 쓰레기의 농도를 초과하였다. 가정쓰레기가 혼합되기 전 분리수거된 음식쓰레기의 퇴비화 과정중에 카드융의 함량을 측정한바,봄철과 겨울철에 부산물 퇴비화의 기준치를 초과하였다. 분리수거된 가정쓰레기에 수분조절제로 첨가된 석탄회는 퇴비중의 중금속 함량을 낮추는 효과가 있었다. 소형 퇴비화 용기에서 1 개월 퇴비화한 음식쓰레기를 야외에서 야적하여 숙성시켰는데,이 기간동안에 중금속의 축적은 일어나지 않았다.