Agriculture using unused waste heat of incinerator-Development of agriculture-aquaculture complex system and verification tests

2021 Fiscal Year Final Research Report

• Project/Area Number: 17KT0070
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Multi-year Fund
• Section: 特設分野
• Research Field: Agricultural Resources for the Next Generation
• Research Institution: Utsunomiya University
• Principal Investigator: Yamane Kenji 宇都宮大学, 農学部, 教授 (60240066)
• Co-Investigator(Kenkyū-buntansha): 飯郷 雅之 宇都宮大学, 農学部, 教授 (10232109) ; 池口 厚男 宇都宮大学, 農学部, 教授 (10222415) ; 前田 勇 宇都宮大学, 農学部, 教授 (10252701)
• Project Period (FY): 2017-07-18 – 2022-03-31
• Keywords: アクアポニックス / デシカント冷房 / 微生物叢

Outline of Final Research Achievements

Trial tests of lettuce hydroponics (HP), aquaculture of catfish (AC), and aquaponics (AP) were performed. Accumulation of nitrate nitrogen and phosphate in the nutrient solution was reduced in the AP and HP groups. Nitrifying bacteria and nitrate bacteria were detected in the nutrient solution. AP has been shown to be a sustainable cultivation system even in small systems. A demonstration test of a desiccant cooling system using hot air of about 43C from the low temperature waste heat of about 98C of an incinerator was conducted in a strawberry greenhouse. Cooling ability was 175 W, and COP was estimated to be 0.32. It was confirmed that the moisture adsorbed on the adsorbent can be desorbed in this system, and thus the possibility of cooling using waste heat was shown.

Free Research Field

園芸科学

Academic Significance and Societal Importance of the Research Achievements

閉鎖系のアクアポニックスにおける餌の役割および微生物の動態を明らかにした点は学術的に意義がある．また，廃熱を利用したデシカント冷房の開発は学術的に意義がある．園芸と水産の複合経営や省エネルギー的な栽培につながるという観点から社会的にも意義がある．