• 농업과학연구
• /
• 제2권1호
• /
• pp.233-240
• /
• 1975

돈분뇨(豚糞尿)의 공해(公害)를 조사(調査)하기 위(爲)하여 유성종축장(儒城種畜場) 홍도동양돈장(弘道洞養豚場)에서 사육(飼育)되고 있는 모돈(牡豚) 27두(頭)를 가지고 분뇨량(糞尿量), 질소(窒素), 인산(燐酸) 가리(加理) 함량(含量) 기생(寄生) 충란(蟲卵), 검사등(檢事等)을 실시(實施)하였으며 돈사오수(豚舍汚水)의 정화(淨化)를 목적(目的)으로 돈분(豚糞)에 발효제(醱酵齊) 오니등(汚泥等)을 첨가(添加)하고 정유물(淨游物), 증발잔유물(蒸發殘留物), 열감작량, B.O.D 등(等)을 검정(檢定)한 결과(結果) 다음과 같은 결과(結果)를 얻었다. 1) 분뇨량(糞尿量)은 1일평균(日平均) 유성종축장(儒城種畜場)이 최고(最高) 2700g, 최저(最低) 500g 이었고 홍도동양돈장(弘道洞養豚場)이 최고(最高) 4500g, 최저(最低) 450g으로서 분뇨비(糞尿比)는 1 : 1이었다. 2) 질소(窒素), 인산(燐酸) 가리(加理)를 분석(分析)한 결과(結果) 질소(窒素)는 분(糞)이 0.514 ppm, 뇨(尿)가 0.802 ppm, 인산(燐酸)은 분(糞)이 0.0739%, 뇨(尿)가 2.261%, 가리(加里)는 분(糞)이 0.0967%, 뇨(尿)가 1.094%이였다. 3) 분(糞)의 기생충란(寄生蟲卵)을 조사(檢査)한 결과(結果) 돈폐충(豚肺蟲) 및 장결절충란(腸結節蟲卵)이 가장 많고 회충(蛔蟲)이 다음이며 편충(鞭蟲)과 간충란(桿蟲卵)이 가장 적었다. 4) 발효제(醱酵齊)의 첨가효과(添加效果)는 무처리(無處理)에 비(比)하여 건조잔유물(乾燥殘留物), 부유물(浮留物), 열감작량, B.O.D 등(等)의 감량(減量)이 나타났으나 현저하지 못하였고 오니(汚泥)를 첨가(添加)할때의 분해효과(分解效果)는 발효제(醱酵齊)에 비(比)하여 상승(上昇) 되었다.

• 유기물자원화
• /
• 제8권2호
• /
• pp.102-113
• /
• 2000

본 연구에서는 지렁이처리기술의 실증실험을 통하여 규모의 확대가능성을 파악하고 아울러 유기성오니 처리에 대한 대책방안을 제시하기 위한 목적으로 실제 현장에 사육상을 설치하여 지렁이의 이식방법에 따른 지렁이의 거동 및 정화조.분뇨오니의 처리효율에 대하여 비닐하우스상과 비교검토하였다. 그 결과, 노지사육상에서의 지렁이의 지렁이사육상의 6개월간 먹이 섭취율은 0.27~0.33톤/$m^2$ 로 나타나고, 분변토 발생량은 사육상 6개월간 단위 면적당 평균 0.15톤/$m^2$이었으며 급이된 분뇨케잊의 약 45.5% (44.1~46.7%)로 나타나 절반 정도가 분변토로 배출되어, 비닐하우스 사육상간의 차이는 보이지 않았다. 노지 사육상에서의 지렁이 서식밀도는 최대밀도가 $7kg/m^2$을 기록한 적도 있으나 평균적으로 약 $6.5kg/m^2$을 나타내었고 계절별로는 봄과 가을에 밀도가 높으나 여름에는 다소 낮아지는 경향을 보였으며, 노지사육상에서의 지렁이의 연령분포도는 성체가 많고 유체가 적게 나타나는 역피라미드 형으로 나타났다. 지렁이를 이용하여 처리하는 당해사업소(하우스시설 1200평, 노지 7000평)에는 매립처리비용 및 운반비로 소요되는 비용의 절감효과와 생산된 분변토를 판매한 수익으로 월간 960만원의 수입이 창출되었을 뿐만 아니라 기존의 매립처리방법에 비하여 환경친화적인 것으로 판단되었다.

• 대한환경공학회지
• /
• 제36권5호
• /
• pp.367-377
• /
• 2014

국내 최대 상수원인 팔당호는 하천형 호소로 분류되며, 팔당호 수질은 외부오염원의 영향이 크다. 이에 본 연구에서는 팔당호 상류지역의 오염원 분포와 오염물질 유출특성을 분석하여 BOD와 TP 관리를 위한 중점관리 오염원을 선정하고자 하였다. 이를 위해 11개 단위유역에 대한 오염원별 발생부하량과 배출부하량을 조사하고, 74개 소하천의 수질 유량 측정결과를 이용하여 유달부하량과 유역면적당 유달부하 밀도를 분석하였다. 오염원별 BOD, TP 발생부하량과 배출부하량, 유달부하량을 분석한 결과, BOD 발생부하량은 축산계가 66.0%로 가장 높은 비율을 차지하였고, BOD 배출부하량은 생활계가 42.7%를 차지하였으며, BOD 유달부하량은 축산계와 생활계가 각각 36.4%, 34.3%를 차지하는 것으로 나타났다. TP 발생부하량과 배출부하량, 유달부하량 모두 축산계에서 가장 높은 비율을 차지하였으며, 각각 82.5%, 44.4%, 46.7%로 나타났다. 또한 BOD 유달부하밀도는 인구밀도가 높은 경안천 유역이 $14.6kg/km^2/d$으로 가장 높았고, TP 유달부하밀도는 가축사육두수가 많은 청미천 유역이 $1.23kg/km^2/d$이 가장 높게 나타났다. 이러한 연구결과를 통해 팔당호 수질개선을 위해서는 생활오수와 가축분뇨를 중심으로 오염원관리가 필요하며 경안천 유역은 생활오수에 대한 관리가 필요하고 남한강 유역, 특히 청미천 유역은 가축분뇨에 대한 관리가 필요한 것으로 판단되었다.

• 한국축산시설환경학회지
• /
• 제19권2호
• /
• pp.81-88
• /
• 2013

We planned to study how the chemical disposal designed by SOP can affect on physicochemical compositions of the livestock excrement. According to Livestock Manure Management Scheme, we experimented in two steps; the first step, NaOH treatment-Citric acid neutralization, and then the second procedure, Thermophilic Aerobic Oxidation (TAO) system. Physicochemical compositions of the 3-days-old samples after NaOH treatment were pH 10.31, EC 24.54 mS/cm, SCOD 3,022 mg/L, T-N 4,315 mg/L, $NH{_4}^+-N$ 1,960 mg/L, and not detected E. coli.. And those of one-day-old samples after citric acid neutralization were pH 7.36, EC 32.89 mS/cm, $SCOD_{Mn}$ 12,733 mg/L, T-N 4,787 mg/L, $NH{_4}^+-N$ 2,450 mg/L, and E. coli. not detected. In contrast, the physicochemical compositions of the treatment plots after the second treatment with TAO system (72hr) were pH 9.42 EC 24.21 mS/cm, $SCOD_{Mn}$ 3,660 mg/L, T-N 3,616 mg/L, $NH{_4}^+-N$ 1,190 mg/L, and no detection of E. coli.

• 복식
• /
• 제58권8호
• /
• pp.63-73
• /
• 2008

From the ancient Korea to the late Joseon Korean fur and leather had been preferred in and out of Korea for their good quality and excellent manufacturing skill. Since Unified Silla (A.D.676${\sim}$A.D.936) Korean fur and leather were manufactured divisionally by workmen specialized in materials and products, and such manufacturing process was succeeded to Goryeo and Joseon. Manufacturing of fur and leather was consisted of as follows: hunting and butchering - peeling - beating with a paddle and removing fat - oil manufacturing - drying - tanning, then cutting and sewing, and there was a special caring method. In order to make good fur and leather, each process of manufacturing needed particular techniques and all available methods were tried to have tender fur and leather by using smoking, excrement, lime, vegetable tannin and even cerebral liquid. And also required mouth-chewing and hand-pounding with a lot of time and of labor Keeping furs resilience and flexibility, sowing several skins together, even when the after-all-process skin was converted into clothes, was much more difficult than sewing fabric. Thus, the manufacturing cost was as much expensive as skin materials, and the volume of manufacturing of fur and leather was also limited. Therefore, fur and leather must have been popular for scarcity value in the manufacturing process, and this scarcity must have caused an extreme luxury of fur.

• 환경위생공학
• /
• 제22권4호
• /
• pp.23-32
• /
• 2007

Changes in the characteristics of dissolved organic matter was studied at selected stations in the Nakdong river basin using physical and chemical methods. Characteristics of dissolved organic matters were analysed and assessed. Production of disinfection byproducts were also investigated. Distribution of the organic compounds according to the Molecular weight(MW) indicate that MWs higher than 100K were highest with cattle excrement wastewater and MW between 100-10K were highest with waters from forest streams. Low MW compounds (Jess than 1K) were highest with the effluents from environmental facilities. Results of resin fractionation study show that acidic hydrophobic substances(AHS) were dominant in many stations. The values were higher in the samples from mainstreams and sidestreams where the influence of organic matter is higher than the water from environmental facilities. Hydrophilic neutral substances(HoN) such as hydrocarbon, pesticides and detergents were higher in the wastewater treatment facilities. HoN values of water from the forest streams were 4.7% indicating there is no synthetic pollutant.

• 한국과학교육학회지
• /
• 제14권3호
• /
• pp.285-292
• /
• 1994

The purpose of this study is to investigate the misconception about circulatory / excretional system and to determine the effectiveness of two teaching strategies. The subject was 214 middle school students. The control group was instructed with the traditional teaching method.On the other hand, the experimental group was taught with the concept mapping teaching method. Then the effectiveness of the two teaching strategies were compared in terms with the changes of their conceptions about circulatory/excertional system. The major findings of this study are as follows. 1. The major misconception types were identified. 1) The function of blood is only transportation. 2) The artery is equal to arterial blood. 3) The colon and the anus are also excretional organs. 4) Urine is formed from the bladder. 5) Urine and feces are also excrement. 2. Different conceptional change was observed between control group and experimental group at 0.05 significance level. The concept mapping strategy was more effective than traditional teaching method. 3. No significent difference was found between male and female students in the effectiveness of concept mapping strategy.

• 보존과학회지
• /
• 제25권3호
• /
• pp.317-322
• /
• 2009

딱정벌레목 빗살수염벌레과의 Nicobium castaneum이 2006년 제주민속박물관 소장품, 2007년 미리벌민속발물관 소장품과 2008년 제주도에서 보관되어온 상여에서 목재를 가해하고 있음이 발견되었다. 본 종으로부터 목제 문화재의 보존을 위한 동정 및 해충 관리를 위해 성충 형태, 충공 및 갱도 등 가해 형태, 배설물 등에 관해 보고하는 바이다.

• 한국환경보건학회지
• /
• 제3권1호
• /
• pp.22-26
• /
• 1976

Korea Parasite Eradication Association alleged in its seasonal spring report in 1975 that 36.8 percent of primary, middle and high school students in Seoul area are infected with parasites. Such a high rate of infection is a result of having used raw excrement for manure. Soil is, therefore, to a large extent infected with parasite eggs. In order to present helpful reference materials for preventing parasite infection in the area where human feces have been used for manure, soil in Seoul area and the suburban districts is sampled at random and then the rate of infection in various areas and the variation of infection rate in the same area are studied. The results are as follows 1) The parasite infection rates the according to districts are, Sootaik-ri 39.9%, Chamsil-dong14.2%, Songpa-dong 13.2%, Sageun-dong 12.8% Chayang-dong 11.4%, Sungsoo-dong 8.5%. The above figures show that the rate becomes higher as the area is farther from the urban and residential districts and nearer to the rural area. 2) The rates of detected parasites according to their kinds are as follows Ascaridae 55.9%, Ancylostomatidae 19.9%, Trichocephalus 13.5%, Trichostrongylus 5.7%, Tenia 3.9%, Enterobius 1.1% 3) The monthly variation of infection rate in the same districts, in the case of Sageun-dong, is, August 25.7%, July 18.9%, June 16.2%, September 15.3% April 12.6%, May 11.3%. The above shows that the infection rate of soil is comparatively higher in the summer season.

• 상하수도학회지
• /
• 제35권1호
• /
• pp.27-37
• /
• 2021

Tetracycline is one of the most commonly used as antibiotics for the livestock industry and it is still widely used nowadays. Tetracycline and its metabolites are excreted with excrement, which is difficult to completely removed with conventional sewage treatment, therefore it is apprehended that the tetracycline-resistant bacteria occurs. In this study, the oxidant named ferrate(VI) was used to degrade the tetracycline and investigate the reaction between ferrate(VI) and tetracycline under various aqueous conditions. The highest degradation efficiency of tetracycline occurred in basic condition (pH 10.1 ± 0.1) because of the pKa values of tetracycline and ferrate(VI). The results also showed the effect of water temperature on the degradation of tetracycline was not significant. In addition, the dosage of ferrate(VI) was higher, the degradation of tetracycline and the self-degradation of ferrate(VI) also higher, finally the efficiency of ferrate(VI) was lower. The results said that the various mechanisms effects the reaction of ferrate(VI) oxidation, it required the consideration of the characteristics of the target compound for optimal degradation efficiency. Additionally, intermediate products were detected with LC/MS/MS and three degradation pathways were proposed.