Properties and Salinity of Sedimentation Solid Discharged from Aquaculture Tanks for Farmland Application
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- YAMAOKA Masaru
- Faculty of Agriculture, University of the Ryukyus
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- NAKAMURA Ichirou
- Faculty of Agriculture, University of the Ryukyus
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- KINJO Kazutoshi
- Faculty of Agriculture, University of the Ryukyus
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- ENDO Masato
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology
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- YAMASHINA Fumika
- Graduate School of Engineering and Science, University of the Ryukyus
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- YAMAUCHI Chihiro
- Organization for Research Promotion, University of the Ryukyus
Bibliographic Information
- Other Title
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- 農地還元に向けた養殖水槽の沈殿固形物の性状及び塩分についての考察
Abstract
<p>The fertilizer components and salinity of sediments (fish feces, leftovers, etc.) collected from aquaculture tanks, where saltwater fish are raised, were investigated for application to farmlands. The sedimentation solids were acidic at pH 4.9, and the C/N ratio was lower than those of cattle manure and swine manure. Total nitrogen and phosphate were higher than those of cattle manure and swine manure, but potassium was much lower than those of cattle manure and swine manure. The content of heavy metals in the sedimentation solids was well below the allowable amount for sludge fertilizer. The sedimentation solids contained high concentrations of chloride (Cl-) and sodium (Na+) ions. The origin of the Cl- and Na+ was thought to be due to seawater in the sedimentation solids. Since commercial compost made from cattle manure contained about 1.82% Cl- and 0.57% Na+ in dry matter, it was considered that the sedimentation solids would not be a problem in application to agricultural land if the Cl- and Na+ contents were similar or lower.</p>
Journal
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- Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering
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Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering 91 (2), I_149-I_155, 2023
The Japanese Society of Irrigation, Drainage and Rural Engineering
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Keywords
Details 詳細情報について
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- CRID
- 1390860609162728960
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- ISSN
- 18847242
- 18822789
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- Text Lang
- ja
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- Data Source
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- JaLC
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- Abstract License Flag
- Disallowed