Recycling of biodiesel fuel wastewater for use as a liquid fertilizer for hydroponics

Wastewater is discharged during washing processes in the production of biodiesel fuel (BDF) using alkaline catalysts. It can be recycled as a liquid fertilizer for hydroponics by adding essential components for plant growth. The effects of the liquid fertilizer on plant growth were investigated. Liq...

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Bibliographic Details
Published inJournal of material cycles and waste management Vol. 19; no. 3; pp. 999 - 1007
Main Authors Kohda, Jiro, Nakano, Yasuhisa, Kugimiya, Akimitsu, Takano, Yu, Yano, Takuo
Format Journal Article
LanguageEnglish
Published Tokyo Springer Japan 01.07.2017
Springer Nature B.V
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Summary:Wastewater is discharged during washing processes in the production of biodiesel fuel (BDF) using alkaline catalysts. It can be recycled as a liquid fertilizer for hydroponics by adding essential components for plant growth. The effects of the liquid fertilizer on plant growth were investigated. Liquid fertilizer containing a smaller amount of the BDF wastewater had a similar effect on plant growth as the standard nutrient solutions. This result reveals that BDF wastewater can be recycled for use as a liquid fertilizer for hydroponics. However, fertilizer with a larger amount of the BDF wastewater showed poor and varied plant growth due to the growth of microorganisms in the contaminated wastewater. Hence, when BDF wastewater becomes contaminated during storage, sterilization is necessary to recycle it as a liquid fertilizer. Moreover, contamination during storage should be avoided for successful recycling.
ISSN:1438-4957
1611-8227
DOI:10.1007/s10163-016-0545-5