Optimum Recovery of Biogas from Pig Slurry with Different Compositions

Park, Woo-Kyun; Park, Jun-Gyu; Kwon, Soon‐Ik; Chae, Kyu-Jung; Park, Noh-Back

doi:10.5338/kjea.2010.29.2.197

Cited by 7 publications

(3 citation statements)

References 4 publications

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“…Swine manure (TS: 3.84% and VS: 2.36%) was processed with a CSTR (Kim et al, 2001), and the stirring speed was 90 rpm, which is the optimal stirring speed for 3% solid content (Park et al, 2010). At this speed, 120 min of stirring was conducted in a day, and four different stirring intervals (5 min/h, 10 min/2 h, 15 min/3 h, and 20 min/4 h) were used.…”

Section: Swine Manurementioning

confidence: 99%

Evaluating Feeding of Organic Waste and Stirring Interval to Optimize Anaerobic Digestion

Kim¹,

Kim

2014

Journal of Biosystems Engineering

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Purpose:In the process of anaerobic digestion, stirring of the digester and feeding of organic waste into the digester have been considered important factors for digestive efficiency. The objective of this study was to determine the most appropriate conditions for both stirring interval of the digester and organic feeding frequency in order to improve anaerobic digestion performance. Methods: A 5-L anaerobic digester was used to conduct continuous batch tests to process swine manure and food waste. Four different stirring intervals of the digester were used: 5 min/h, 10 min/2 h, 15 min/3 h, and 20 min/4 h. Results: The application of swine manure to the digester every 5 min/h resulted in the highest production of biogas as well as the highest removal rates of volatile solids (VS) and total chemical oxygen demand. Stirring the digester with a mixture of swine manure and food waste at intervals of 5min/h and 10min/2 h produced the highest biogas yields of 515.3 mL/gVS and 521.1 mL/gVS, respectively. To test different supply frequencies, organic waste was added to the digester in either a 12-hor 24-h cycle. The 24-h cycle produced 1.5-fold greater biogas production than that during the 12-h cycle. Conclusions: Thus, from the above results, to optimize anaerobic digestion performance, the ideal stirring condition must be 5min/h for swine manure feeding and 10min/2h for co-digestion of food waste and swine manure in a 24-h cycle.

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Section: Swine Manurementioning

confidence: 99%

Evaluating Feeding of Organic Waste and Stirring Interval to Optimize Anaerobic Digestion

Kim¹,

Kim

2014

Journal of Biosystems Engineering

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“…슬러리형 돈사는 양돈농가에서 사육경영상 유지관 리가 용이하여 선호하고 있으나, 유기성 폐기물의 해양투기 금지 등에 의하여 돈분슬러리의 처리가 큰 문제로 대두되고 있다. 슬러리 형태의 돈분뇨는 일반적으로 유기물 함량이 높 고, 수분함량 및 생분해율이 높아 혐기성 처리에 적합한 조건 을 가지고 있어 유기물 감량에 따른 처리비용 절감, 폐자원의 대체에너지 이용, 농경지의 액비 활용시 악취 저감, 세균성 미생물 감소 측면에서 혐기성 소화기술을 이용한 돈분슬러리 처리가 적절한 방법으로 보고되고 있다(Park et al, 2010).…”

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“…저장기간이 길어지면 저장기간 중에 가수분해가 진행되어 생물학적 이용 가능한 유기물이 감소하기 때문에 돈사의 구조 및 돼지 사육형태, 계절 등 돈분슬러리 성상과 특성을 고려한 운전이 이루어져야 소화효율이 증대되는 것으 로 알려져 있다(Park et al, 2010).따라서 본 연구에서는 돈분 슬러리의 저장 특성이 혐기소 화 효율에 미치는 영향을 관찰하기 위해 돈분 슬러리의 저장 형태, 계절별 성상변화 및 저장온도 등에 따른 가용화 특성 및 유기물의 거동을 분석하였다.도에 따른 성상변화를 방지하기 위해 경기도 R 축산연구소(Fig. 1)에서 채취하였고, 돈분 슬러리 내 협잡물 및 모래 등 을 제거하기 위해 2 mm 체(sieve)로 거른 후 사용하였다.…”

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Solubilization Characteristics of Piggery Slurry by Different Storage type and Temperature Conditions

Park¹,

Park²,

Park³

et al. 2010

Korean Journal of Environmental Agriculture

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Abstract:The current study investigated the fate of organic matter in piggery slurry under two different store systems(closed store system and open store system) in association with different temperature. Thirty days after storing in both systems at 20℃, it was observed that the content of organic matter remained in piggery slurry with closed store system was twice more than that with open store system implying more efficient degradation of organic matter with open store system. Temperature also influenced on the organic matter degradation in piggery slurry as shown decline in TS and VS contents as the temperature increased. With store at 35℃, 29% of initial organic matter was reduced while there was only 23% reduction of organic matter at 20℃. There was no difference in the type of organic fatty acids(VFAs) produced under the range of temperature(20, 35℃) simulating summer condition. Increases in organic fatty acids contents with hydrolysis and acid producing microbial was observed from 15 days after initiating store of the piggery slurry and the total organic acid amount produced 30 days after store was 2,829 mg․COD/L and 9,123 mg․COD/L at 20℃ and 35℃, respectively. These corresponded to 5.4% and 17.4% of the initial organic matter contents in piggery slurry, respectively.

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Effect of Methane Production from Pig Manure Slurry According to The Solids Concentration and The Crushing Solids of Pig Manure Slurry

Jeong¹,

Kim²,

Lee³

et al. 2015

Journal of the Korea Organic Resource Recycling Association

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Recently, the number of anaerobic digestion facility for livestock manure is on the rise in Korea.All of the livestock manure anaerobic digestion facilities in operation use pig manure slurry as a substrate for anaerobic digestion. Generally, pig manure slurry is composed of 97% water and 3% solids. The particulate matter, such as corn in the form of particles that is undigested by pig is contained in the pig manure slurry. Particulate matter is a factor reducing the effectiveness of biogas production in the anaerobic digestion process. In this study, mechanical grinding treatment was applied to analyze the effect of methane production from pig manure slurry by reducing the particle size of the slurry. On the other hand, the effect of the solid concentration levels on methane production and methane content of the biogas was analyzed. The fine particle concentration in the pig manure slurry was increased by the mechanical grinding treatment. And methane production and methane content of the biogas were higher in grinded pig manure slurry than untreated raw slurry.

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Optimum Recovery of Biogas from Pig Slurry with Different Compositions

Cited by 7 publications

References 4 publications

Evaluating Feeding of Organic Waste and Stirring Interval to Optimize Anaerobic Digestion

Evaluating Feeding of Organic Waste and Stirring Interval to Optimize Anaerobic Digestion

Solubilization Characteristics of Piggery Slurry by Different Storage type and Temperature Conditions

Effect of Methane Production from Pig Manure Slurry According to The Solids Concentration and The Crushing Solids of Pig Manure Slurry

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