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Potential Methane Production on Anaerobic Co-digestion of Swine Manure and Food Waste
( Joung Du Shin ),( Sang Won Park ),( Sang Hyoun Kim ),( Jack Duangmanee ),( Po Heng Lee ),( Shi Hwu Sung ),( Bong Hoon Lee ) 한국환경농학회 2008 한국환경농학회지 Vol.27 No.2
Anaerobic co-digestion of swine manure and food waste for biogas production was performed in serum bottles at various volatile solids (VS) contents and mixing ratios of two substrates (swine manure : food waste = 100 : 0 ~ 0 : 100). Through kinetic mode of surface methodology, the methane production was fitted to a Gompertz equation. The ultimate methane production potential of swine manure alone was lower than that of food waste regardless of VS contents. However, it was appeared that maximum methane production potentials in 80 : 20 of the mixing rate at VS 3% was enhanced at 144.7%, compared to its only swine manure. The potential increased up to 815.71 ml/g VS fed as VS concentration and food composition increased up to 3.0% and 20%, respectively. The ultimate amount of methane produced had significantly a positive relationship with that of methane yield rate. Overall, it would be strongly recommended that feeding stocks use 20% of mixing ratio of food waste based on VS 3% contents when operating the anaerobic reactor on site at 35℃ if not have treatment of its anaerobic waste water.
Run-off Impact Assessment of the Steeped Cornfield to Small Stream
Shin, Joung-Du,Lee, Jong-Sik,Kim, Won-Il,Jung, Goo-Bok,So, Kyu-Ho,Lee, Jung-Teak,Lee, Myong-Sun The Korean Society of Environmental Agriculture 2005 한국환경농학회지 Vol.24 No.4
This experiment was conducted to evaluate the nutrient loss and to assess the eutrophication into small stream by intensive rains in the steeped cornfield during cultivation. The crop cultivated was a soiling com (DW5969), and the experimental plots were divided into two parts that were 10 and 18% of slope degrees. The amount of T-N and T-P loss was calculated by analysis of surface run-off water quality, and was investigated the effect of eutrophication to small stream as a part of life cycle assessment (LCA) methodology application. For the surface run-off water quality, EC and T-N values were highest in first runoff event as compared to the other events and maintained the stage state with litter variations at every hour during the runoff period except for EC in the slope 18%. However, T-P concentration has been a transient stage after runoff event of July 27. Total surface run-off ratio was not significantly different with slope degrees, but amount of T-N and T-P losses at 18% of slope were high as $5.96kg\;ha^{-1}\;and\;0.65kg\;ha^{-1}$ as relative to 10% of slope degree, respectively. Furthermore, T-N losses from run-off water in the sloped cornfield 10 and 18% were approximately 9.8 and 12.5% of the N applied as fertilizer when the fertilizer applied at recommended rates after soil test, respectively. For the eutrophication impact to the small stream, it was shown that $PO_4$ equivalence and Eco-indicator value at 18% of slope degree were greater as much $6.11kg\;ha^{-1}$ and 0.81 as compared to the slope angle 10%, respectively. Therefore, it was appeared that each effect of nutrient losses, eutrophication and Eco-indicator value was enhanced according with higher slope degree.
Predicting Methane Production Potential of Anaerobic Co-digestion of Swine Manure and Food Waste
Joung Du Shin,Sung Su Han,Ki Cheol Eom,Shih Wu Sung,Sang Won Park,Hyun Ook Kim 대한환경공학회 2008 Environmental Engineering Research Vol.13 No.2
Anaerobic co-digestion of swine manure and food waste for biogas production was performed in serum bottles at 2% volatile solids(VS) concentration and various mixing ratios of two substrates(swine manure: food waste=100:0~0:100). Through kinetic mode of surface methodology, the methane production was fitted to a Gompertz equation. The specific methane production potential of swine manure alone was lower than that of food waste. However, maximum methane production potential increased up to 1.09-1.22% as food waste composition increased up to the 80%. The maximum methane production value of food waste was 544.52㎖/g VS. It was observed that the maximum methane production potential of 601.86㎖/g VS was found at the mixing ratio of 40:60.
( Joung Du Shin ),( Min Su Han ),( Jin Ho Kim ),( Goo Bok Jung ),( Sun Gang Yun ),( Ki Cheol Eom ),( Myoung Sun Lee ) 한국환경농학회 2003 한국환경농학회지 Vol.22 No.3
Objective of this study was to investigate the influences of harvest index and percolation water quality as irrigated the discharge waters from an industrial and a municipal wastewater treatment plants and seawater (1:5 seawater: tap water) as alternative water resources during tillering stage for drought stress. There were four different treatments such as the discharge water from an industrial (textile dyeing manufacture plant) wastewater treatment plant (DIWT),discharge water from the municipal wastewater treatment plant (DIWT) seawater (1:5) and ground-water as a control. For the initial chemical compositions of alternative waters, it appeared that higher concentrations of COD, Mn^(2+), and Ni^(+) in DIWT were observed than reused criteria of other country for irrigation, and concentrations of EC_(i), Cl and SO₄ in seawater were higher than that for irrigation. Harvest index was not significantly different between DIWT and DMWT with different irrigation periods in two soil types, but that of seawater (1:5) is decreased with irrigation periods in clay loam soil and not different between 10 days and 20 days of irrigation periods in sandy loam soil. For percolation water qualities, values of sodium adsorption ratio (SAR) are increased with prolonging the imgation periods of seawater (1:5) and DIWT, but those of DMWT were almost constant through the cultivation periods regardless of the irrigation period in both soil types. EC_(i) of percolation waters is eventually increased with prolonging days after irrigation regardless of irrigation periods in both soil types. Therefore, it might be concluded that there was potentially safe to irrigate the discharge water from municipal wastewater treatment plant relative to harvest index, SAR and EC_(i) values of the ground water through the rice cultivation period at tillering stage for drought period.
Potential Methane Production on Anaerobic Co-digestion of Swine Manure and Food Waste
Shin, Joung-Du,Park, Sang-Won,Kim, Sang-Hyoun,Duangmanee, Jack,Lee, Po-Heng,Sung, Shi-Hwu,Lee, Bong-Hoon The Korean Society of Environmental Agriculture 2008 한국환경농학회지 Vol.27 No.2
Anaerobic co-digestion of swine manure and food waste for biogas production was performed in serum bottles at various volatile solids(VS) contents and mixing ratios of two substrates(swine manure:food waste=$100:0{\sim}0:100$). Through kinetic mode of surface methodology, the methane production was fitted to a Gompertz equation. The ultimate methane production potential of swine manure alone was lower than that of food waste regardless of VS contents. However, it was appeared that maximum methane production potentials in 80 : 20 of the mixing rate at VS 3% was enhanced at 144.7%, compared to its only swine manure. The potential increased up to 815.71 ml/g VS fed as VS concentration and food composition increased up to 3.0% and 20%, respectively. The ultimate amount of methane produced had significantly a positive relationship with that of methane yield rate. Overall, it would be strongly recommended that feeding stocks use 20% of mixing ratio of food waste based on VS 3% contents when operating the anaerobic reactor on site at $35^{\circ}C$ if not have treatment of its anaerobic waste water.