Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 62, Issue 3, Pages 691-698Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jf404265f
Keywords
cleaner production; rice straw; soil; wastewater treatment; organic fertilizer; Eudrilus eugeniae; palm oil mill effluent (POME); vermicomposting
Funding
- Department of Higher Education, Malaysia [FRGS/1/2013/STWNO3/MUSM/02/1]
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In this laboratory-scale study, earthworms were introduced as biodegraders of palm oil mill effluent (POME), which is a wastewater produced from the wet process of palm oil milling. POME was absorbed into amendments (soil or rice straw) in different ratios as feedstocks for the earthworm, Eudrilus eugeniae. The presence of earthworms led to significant increases in pH, electrical conductivity, and nutrient content but decreases in the C/N ratio (0.687-75.8%), soluble chemical oxygen demand (19.7-87.9%), and volatile solids (0.687-52.7%). However, earthworm growth was reduced in all treatments by the end of the treatment process. Rice straw was a better amendment/absorbent relative to soil, with a higher nutrient content and greater reduction in soluble chemical oxygen demand with a lower C/N ratio in the vermicompost. Among all treatments investigated, the treatment with 1 part rice straw and 3 parts POME (w/v) (RS1:3) produced the best quality vermicompost with high nutritional status.
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