Phosphate-Solubilizing Potential of Aspergillus niger TISTR 3254 and Penicillium notatum TISTR 3560 and Their Application with Rice Noodle Wastewater for Compost Production
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Abstract
This research aimed to compare the phosphate rock solubilization efficiency of the fungi Aspergillus niger TISTR 3254 and Penicillium notatum TISTR 3560, as well as the use of their mixed culture to enhance major nutrient contents in compost derived from cattle manure, using discarded rice noodle wastewater (RNW) as a supplementary organic nutrient source. The experiment was conducted at the laboratory scale at 30 °C for 8 days. The results showed that the mixed culture of A. niger TISTR 3254 and P. notatum TISTR 3560 achieved the highest phosphate solubilization, reaching 85.43 mg/L, and reduced the pH from 7.03 to 5.81, which was significantly lower than that obtained from single-strain fermentation (P < 0.05). For compost development, the addition of 2% (v/w) discarded RNW and 5% (w/w) phosphate rock, together with 1.5% (w/w) mixed fungal inoculum, resulted in the highest phosphorus content of 0.93%, along with nitrogen and potassium contents of 1.65% and 3.06%, respectively, which complied with the organic fertilizer standards of the Department of Agriculture. Storage of the compost at room temperature for 15 days led to a slight reduction in major nutrient contents; however, the values remained within the standard limits. The findings indicate that the application of fungi in a co-fermentation system with discarded RNW significantly enhances phosphate solubilization efficiency and compost quality at the 95% confidence level. Moreover, this approach provides a sustainable alternative for agricultural waste utilization, reduces production costs, and is environmentally friendly.
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King Mongkut's Agricultural Journal
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