著者

中村 修 佐藤 剛史

雑誌

長崎大学総合環境研究 (ISSN:13446258)

巻号頁・発行日

vol.4, no.2, pp.1-9, 2002-04-30

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It is possible to return livestock's urine to environment safely and to reuse it as resource through biological decomposition. Most of livestock's urine, however, is disposed of unsuitably, and it is regarded as one of prime causes of water pollution now. Since 1999,livestock farmers are obligated to dispose of livestock's urine suitably by law. In the other words, livestock farmers have to pay the cost of livestock's urine disposition. The purpose of this paper is to investigate the effects and problems of the recircular process of livestock's urine practiced in Kishima area Saga Prefecture. In Kishima area, livestock's urine is reused as liquid fertilizer with a kind of simple process, by which livestock's urine simply mixed with some phosphoric acid and silicone is used as one kind of liquid fertilizer in paddy fields. The merits of the disposition process to livestock farmers can be concluded as : firtly, the cost of livestock's urine disposition can be cut considerably, secondly, farmland can be reserved by recirclar use of livestock's urine, and thidly, the labor burdan bearing with livestock's urine disposition can be lightened greatly. As well the merits to cultivation farmers include : to lighten the labor burdan of fertilizer spreading, to cut the cost of the chemical fertilizer, to improve the quality of rice and to stabilize the yield of rice, to provide the high value-added agricultural products. The technique of recirclar use of the livestock's urine for the liquid fertilizer was developed from the viewpoint of intra-regional circular use. Therefore, it is hopeful to convert the social cost of environment conservation for the regional common benefits into farmer's individual cost economically by this way.

著者

柿沼 伸良 相田 卓 佐藤 剛史 阿尻 雅文 新井 邦夫

出版者

一般社団法人 日本エネルギー学会

雑誌

石炭科学会議発表論文集 第38回石炭科学会議 (ISSN:24238295)

巻号頁・発行日

pp.123-126, 2001-11-13 (Released:2017-03-22)

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Taiheiyo coal extraction experiments with supercritical water (SCW) and SCW-Phenol mixtures were conducted at 400℃ and 25MPa using a semi-continuous apparatus. With increasing the concentration of phenol, the extraction yield increased up to 80wt%-daf. Extraction yield of Yallourn coal extraction shows 80wt%-daf, while that of Adaro coal shows 65wt%-daf with the SCW-PhOH (80wt%) mixtures. Mechanism of the co-solvent reactive extraction was discussed based on the analysis of the products. This suggests the capping effect of phenol to prevent from polymerization of products.

著者

佐藤剛史 内田美智子 九州大学佐藤ゼミ著

出版者

五月書房

巻号頁・発行日

2012

著者

藤原 諒也 大谷 智一 佐藤 剛史 矢部 光保

出版者

九州大学大学院農学研究院

雑誌

九州大学大学院農学研究院学芸雑誌 (ISSN:13470159)

巻号頁・発行日

vol.67, no.2, pp.81-90, 2012-09-20 (Released:2012-10-02)

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Can farmers sell agricultural products at the higher price by reduction of greenhouse gas (GHG)? Or can we find the decreasing marginal willingness to pay(MWTP)by the increasing reduction rate of GHG emission under the law of diminishing marginal utility? If so, what is the most beneficial way to deal with GHG emission for farmers? In order to answer these questions, we conducted an internet survey and got 2062 response. We used Ordered Probit Model to analyze consumer’s preference of rice produced by reduction of GHG emission and find the following results: the highest MWTP for reduction rate of GHG was 10.10 yen between 5 and 10 percent; 6.13 yen was between the 10 and 20 percent; 4.59 yen was between 20 and 50 percent; 0.89 yen was between 50 and 70 percent; MWTP, however, increased by up to 4.20 yen between 70 and 100 percent. Base on this result, we can say that consumers appreciate even a small reduction of GHG and then for farmers to start such activities from the small redaction is effective way when they sell environmental friendly agricultural products. Consumers also find another value for high reduction rate of GHG close to 100 percent. Additionally, other characteristics of consumers who appreciate reduction of GHG were young generation, high income, and more knowledge of farmer’s activities of GHG reduction. 温室効果ガス削減に関する農家の努力は, 農産物の付加価値として, より高い価格では販売することは可能であろうか. また, 温室効果ガスの削減率の増加につれて, 限界効用逓減の法則に従い, 追加1当たり支払意志額は低減であろうか. もし, そうであれば, 農家としてどの程度の削減努力を行うのが妥当であろうか. このような問いに答えるため, 20代以上の女性に対して, インターネットサーベイを行い, 2062名から回答を得た. そして, 米5キログラムを対象に, 温室効果ガス排出量削減に配慮した米への選好について, 順序プロビット・モデルを用いた分析を行い, 以下の結果を得た. 回答者は二酸化炭素の追加1%削減当たりの支払意思額は5% 〜 10%間が最も高く10.10円となり, 10% 〜 20%間が6.13円, 20% 〜 50%間が4.59円, 50%〜 70%間が0.89円と逓減した. 他方, 70% 〜 100%間では上昇し4.20円となった. この結果から, 削減が少量であったとしても消費者は削減を評価しており, 温暖化問題に配慮した農産物を販売する場合, まずは, 生産者は少量の削減に取り組むことが効率的だと考えられる. 他方, 100%に近い削減に対しては, 消費者は新たな価値を見いだしていることも明らかになった. また, 温室効果ガス排出量を削減した農産物を相対的に高く評価するのは, 若い世代や年収の高い消費者, 農家の取組に関する知識が多い消費者であった.

著者

西川 芳昭 佐藤 剛史

出版者

久留米大学

雑誌

産業経済研究 (ISSN:03897044)

巻号頁・発行日

vol.45, no.4, pp.573-596, 2005-03-25