• Title, Summary, Keyword: 잔재물

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Investigation of the Current Status on Generation Route and Recycling of Residue derived Animals (동물성 잔재물의 발생경로 및 재활용업체의 재할용 실태에 대한 조사)

  • Lee, Ju-Ho;Phae, Chae-Gun
    • Journal of the Korea Organic Resources Recycling Association
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    • v.17 no.2
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    • pp.81-92
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    • 2009
  • This study investigated the occurrence of residues derived animals produced during the process of slaughter and the subsequent channels of processing those residues derived animals; the status of recycling of these residues derived animals by recycling business is investigated to utilize the results as the basic data for management purposes. At present, animal slaughter is highly specialized and the residues derived animals obtained from the slaughter of animals are separated and dissected into different parts to serve as fodder and residual compost. Some of the residues derived animals obtained from slaughter, which are edible are utilized for edible purposes and those parts which are not edible such as horns, claws, fats etc. are confirmed to be recycled. Poultry residues derived animals are mostly recycled as single-component feed, used as original forms, residual compost whereas fish remains are recycled mostly as singlecomponent feed etc. Most of the companies that recycle residues derived animals are situated in provinces such as Jeollanamdo, Jeollabukdo, Gyeongsangnamdo, Gyeongsangbukdo, where many of the slaughterhouses are located. And many of these recylcing business find themselves in the vicinity of these slaughterhouse. Majority of these slaughterhouse are capable of processing residues derived animals in the range of 10~60 ton/day, which is quite small in terms of processing capacity. The problem encountered in the recycling of the residues derived animals is the occurrence of foul smell caused by the decomposition, for which appropriate measures have to be taken. The residues derived animals are on many occasions directly collected and transported to save costs and secure required amount of residues derived animals.

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Feasibility Evaluation of Co-Incineration with MSW for Efficient Recycling of the Rejects after Separation Processes in MRF (재활용 기반시설에서 발생하는 선별 잔재물의 자원화를 위한 도시생활폐기물과의 혼합소각 가능성 평가)

  • Shin, Taek-Soo;Sung, Baek-Nam;Yeon, Ik-Jun;Cho, Byung-Yeol;Kim, Kwang-Yul
    • Journal of Korean Society of Environmental Engineers
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    • v.33 no.10
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    • pp.767-773
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    • 2011
  • The purpose of this study was to investigate the possibility of an alternative fuel resource by incinerating a mix of combustible MSW (municipal solid waste) and offals after separating recyclable material at the MRF (material recovery facilities) location. We analyzed the physical and chemical properties including the 3-contents, the calorific value, and chemical compositions of the separation rejects in MRF, and compared the results with combustible MSW. Moreover, we experimented the trend of combustible properties and the concentration change of air pollutants at mixed incineration in the MSW incinerator. According to the results of the experiment, the separation rejects showed higher heating value (5,865 kcal/kg), and lower moisture and ash content than combustible MSW. Since we have incinerated MSW in the MSW incinerator mixing the offals at 30% and 50% respectively, we know that the change of the concentration of dust, $SO_2$, $NO_2$, and CO did not appear significant, and not exceed the pollutants emission regulation. But, considering the enhancement of the HCl emission concentration (max. 33.7 ppm) at the co-incineration of the 50% offals, we believe that the proper mixing ratio of the separation rejects would become within 30%.

Effect of a Mixture of Extracts from Residues of Onion Left after Onion Harvesting and Purslane (Portulaca oleracea) on Productivity and Quality Characteristics of Organic Onions (양파 수확 후 잔재물과 쇠비름 추출물이 유기농 양파의 수확량 및 품질 특성에 미치는 영향)

  • Kim, Tae-Won;Jeon, Byeong-Gyun;Lee, Sung-Ho
    • Journal of Life Science
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    • v.27 no.12
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    • pp.1430-1436
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    • 2017
  • This study assessed the effects of treatment with sap extract from onion residues postharvest and purslane on the quality and quantity of organic onions. At the bending stage, onions treated with the sap extract showed vigorous growth, with higher plant heights, more leaves, and longer sheath lengths than untreated onions. The onion yield was significantly increased when the plant was treated with extracted sap as compared with that of untreated plants (p<0.05). The bulb weight distribution of onions in the mixed onion and purslane treatment was also significantly increased (~300 g) as compared with that of the other treatment (p<0.05). Except for CaO and S, the mineral content of the onions produced from plants treated with the onion and purslane extract mixture was higher than those of onions in the other treatment. The hardness of onions produced from plants treated with the onion and purslane extract was significantly increased (8% and 20%, respectively) as compared with that of onions produced from plants treated with the onion extract only or no treatment (p<0.05). However, there was no significant difference in the sugar contents of the onions produced from extract-treated and nonextract-treated plants. Postharvest, the content of inorganic components (phosphate, calcium, sulfuric acid, and manganese) was higher in soil treated with the onion extract than in soil treated with the onion and purslane extract and non-treated soil. It can be concluded that residues left after onion harvests and purslane extract can be used as natural and environmentally friendly materials for the cultivation of organic onions.

Optimization of Cement Manufacturing Process for Heat Source Application of Automobile Shredder Residue (자동차 폐차잔재(ASR)의 시멘트제조 열원활용공정의 최적화)

  • Oh, Sea-Cheon;Kwon, Woo-Teck;Kim, Soo-Ryong
    • 한국신재생에너지학회:학술대회논문집
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    • pp.464-467
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    • 2008
  • 폐차잔재물중 가연성 성분을 시멘트 제조공정의 열원으로 활용하기 위한 연구가 현재 활발히 진행 중에 있다. 그러나 이러한 폐차잔재물을 시멘트 제조공정의 보조열원으로 사용하기 위해서는 에너지활용에 대한 경제성 및 환경기준과 더불어 시멘트 제조공정의 안정적 조업조건에 대한 검토가 이뤄져야만 하며 특히 폐차잔재물의 연소시 시멘트 제조공정에서의 염소물질의 거동특성에 대한 연구가 반드시 선행되어야만 한다. 따라서 본 연구에서는 이러한 폐차잔재물의 시멘트 제조공정에 대한 열원활용의 최적조건을 도출하고자 현장적용 전 킬른내 염소성분의 제어를 위한 Bypass unit의 Cyclone에 대한 전산모사연구를 수행하였으며 이러한 전산모사결과를 바탕으로 실제 시멘트 제조공정에 대한 폐차잔재물의 현장적용 실험을 수행하였다. 또한 본 연구로부터 시멘트 제조공정에 대한 폐차잔재물의 열원활용 가능성을 확인할 수 있었으며 폐차잔재물의 투입시 시멘트 제조공정의 안정적 조업조건을 확보할 수 있었다.

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Investigation on Sorting Efficiency for Recyclable Materials and Its Improvement Measure at Domestic Sorting Facility (국내 재활용품 선별시설에서 선별 현황 및 개선방안)

  • Kim, Joo-Sin;Pak, Daewon
    • Journal of the Korea Organic Resources Recycling Association
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    • v.25 no.2
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    • pp.15-26
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    • 2017
  • This study was conducted to investigate and analyze the discharge characteristics of recyclable material from S-city, S-district, in order to improve the sorting efficiency in recycling sorting facility. The characteristics of recyclable materials collected were analyzed in three different scopes; source origin, collection and transportation, and sorting steps. The average of recyclable waste generation is $0.121kg/day^*man$. Regional collection period appears to be three times a week, and the density of mixed recyclable wastes showed the average of $202.4kg/m^3$ in the waste collection vehicle. In the analysis into the sorting steps, the average of carrying amount of mixed recycling products is 1,154.6 ton/month, the average of appeared density is $181kg/m^3$, the average amount of separated recycling products is 448.5kg/month, and the density of recycling residue is found out to be $48kg/m^3$. The sorting rate of recyclable material is 38.85% and the percentage of residues is 55.90%. Out of 7,744.8 tons of the total recyclable residues, 4,272.1 tons were found out to be possible recylable materials. As a result of increasing the recycling rate of residues, the encouragement of base-recycling, the automation and retrofit of sorting equipment, and energy recovery from recycling residue were discussed.

Correction Method of Anaerobic Organic Biodegradability by Batch Anaerobic Digestion (회분식 혐기소화에 의한 혐기적 유기물 분해율의 보정 방법)

  • Kim, Seung-Hwan;Oh, Seung-Yong;Kim, Chang-Hyun;Yoon, Young-Man
    • Korean Journal of Soil Science and Fertilizer
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    • v.45 no.6
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    • pp.1086-1093
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    • 2012
  • This research was carried out to develop the correction method of VDI4630 method improving accuracy, and investigated the effects of carbonate ion ($CO_3{^{2-}}$) and reactant water ($H_2O$) on anaerobic organic biodegradability in VDI4630 method. Pig blood, pig intestine residue, pig digestive tract content, and cattle rumen content were experimented as waste biomasses. Chemical formulas of pig blood, pig intestine residue, pig digestive tract content, and cattle rumen content were $C_{3.78}H_{8.39}O_{1.46}N_1S_{0.01}$, $C_{9.69}H_{15.42}O_{2.85}N_1S_{0.03}$, $C_{25.17}H_{43.32}O_{15.04}N_1$, $C_{27.23}H_{42.38}O_{15.93}N_1S_{0.11}$, respectively. And amount of reactant moisture for the anaerobic degradation of organic materials were 0.336, 0.485, 0.227, 0.266 mol, respectively. In pig blood, pig intestine residue, pig digestive tract content, and cattle rumen content, anaerobic organic biodegradability presented as $B_u/B_{th}$ were 82.3, 81.5, 70.8, and 66.1%, and anaerobic organic biodegradability (AB) by VDI4630 method were 72.2, 87.8, 74.2, 62.0%, and that were significantly different with anaerobic organic biodegradability presented as $B_u/B_{th}$. The effects of carbonate ion and reactant water on anaerobic organic biodegradability were not significant, But Accuracy of anaerobic organic degradability was expected to able to be improved by the correction method of VDI4630 considering the carbonate ion at digestate and the reactant water quantified.

Recovery of Calcium Phosphate from Sewage Sludge Ash (하수슬러지 소각재로부터 Ca-P 형태의 인 회수)

  • Jung, Jinmo;Yoon, Seok-Pyo
    • Journal of the Korea Organic Resources Recycling Association
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    • v.26 no.1
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    • pp.29-37
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    • 2018
  • In this study, optimum extraction conditions for phosphorus recovery from sewage sludge ash(SSA) were investigated. For this purpose, an experiment was conducted to determine optimal recovery conditions for Ca-P type phosphorus by using calcium component in the recycled aggregate residue. The phosphorus content of sewage sludge ash was confirmed to be 5.0 %. When $H_2SO_4$ was used as an extract, concentration of 1 N $H_2SO_4$, L/S ratio of 10, and extraction time of 30 min were found to be the optimal extraction conditions. Phosphorus was extracted by using optimal extraction conditions, and then the heavy metals eluted with phosphorus were removed using 1~20 g of cation exchange resin. In 20 g of cation exchange resin, Fe 71.3%, Cu 82.4%, Zn 79.9%, and Cr 15% were removed. After that, the mixing ratio of the calcium extract obtained from the recycled aggregate residue (RAR) was changed to 1:1, 1:5, 1:10. The pH of the SSA to RAR mixture was adjusted to 2, 4, 8 and 12 by the addition of 5 N NaOH to the mixture of 1:5, and the phosphorus was recovered as Ca-P type precipitate. The optimum pH was 8. When recycled aggregate residues were used, the weight of calcium phosphate increased, but the amount of wastewater generated also increased. Therefore, it was concluded that the use of recycled aggregate residue was not economically feasible.

The Measurement of Biochemical Methane Potential in the Several Organic Waste Resources (유기성 폐자원별 메탄 생산 퍼텐셜 측정 연구)

  • Kim, Seung-Hwan;Kim, Hyun-Cheol;Kim, Chang-Hyun;Yoon, Young-Man
    • Korean Journal of Soil Science and Fertilizer
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    • v.43 no.3
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    • pp.356-362
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    • 2010
  • This research studied the bio-methane potential of several waste biomass materials as alternative sources for biogas production, and the laboratory procedure for measuring the biochemical methane potential was described. The wastes from four agro-industries (sewage, livestock, food wastewater treatment sludge and cattle rumen substance generating in slaughter house) were evaluated as substrates for the assay of biochemical methane potential. In order to estimate the ultimate methane yield, two empirical equations (modified Gompertz equation and exponential equation) was investigated. The ultimate methane yield of sewage, livestock, food sludge and lumen substance estimated by the modified Gompertz equation were 0.086, 0.147, 0.146, and 0.121 L $CH_{4}\;g^{-1}\;VS_{added}$, respectively. The ultimate methane yield estimated by the exponential equation were 0.109, 0.246 and 0.174 L $CH_{4}\;g^{-1}\;VS_{added}$ in sewage, livestock sludge and lumen substance. And the ultimate methane yield estimated by the exponential equation showed more high values in the range of 26.7 ~67.3% than the ultimate methane yield estimated by the modified Gompertz equation.

Evaluation of Solidified Fuel Value of Dairy Cattle Manure Digested by Semi-Dry Anaerobic Digestion Method (젖소분뇨 반 건식 혐기소화 잔재물의 고체연료화 가능성 평가)

  • Jeong, Kwang-Hwa;Kim, Jung Kon;Lee, Dong-jun;Cho, Won-Mo;Ravindran, B.;Kwag, Jung-Hoon
    • Journal of the Korea Organic Resources Recycling Association
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    • v.24 no.4
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    • pp.95-103
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    • 2016
  • The objective of this study was to investigate feasibility of semi-dry anaerobic digestion using dairy cattle manure and to evaluate solidified fuel value of semi-dry anaerobic digestate. To evaluate semi-dry anaerobic digestion using dairy cattle manure, 950 mL bottle type anaerobic reactor was set in the constant temperature room maintained at $35^{\circ}C$. To produce anaerobic digestate for making solidified fuel, acrylic cylindrical anaerobic digester(1,000 mm width ${\times}$ 450 mm height) was set in the constant room temperature to carry out batch test of semi-dry anaerobic digestion using same dairy cattle manure. Moisture content of dairy cattle manure and inoculum solution for anaerobic digestion were 80.64% and 96.83%, respectively. The dairy cattle manure and the inoculum solution was mixed by 1:1 ratio(v/v) for anaerobic digestion. Water content and VS/TS(Volatile Solids/Total Solids) of mixture of substrate and inoculum were 89.74% and 83.35%, respectively. In case of non-inoculated anaerobic digester, the biogas was not produced. By the semi-dry anaerobic digestion, the calorific value of the digestate was reduced by 20% compare to fresh dairy cattle manure. In other hand, ash content increased from 15% to 18.4%. The contents of Cr, Pb, Cd and S of pellet produced from anaerobically digested dairy cattle manure were not against the standard regulation for livestock manure solidified fuel. Therefore, it can be used as fuel that anaerobic digestate produced after semi-dry anaerobic digestion using dairy cattle manure.