Abstract
Starch wastes are organic pollutants that have a negative impact on the environment. Bacillus cereus BX16, a newly isolated strain with the capacity to exclusively digest starch, was separated and purified using food waste (FW). The efficiency of starch breakdown by Bacillus cereus BX16 was greatly influenced by operational parameters, such as organic load rates (OLRs), pH and temperature. According to the findings, Bacillus cereus BX16 degraded more effectively at the starting starch concentration of 20 g/L. Further optimization resulted in approximately 90% and 99% removal of soluble chemical oxygen demand (SCOD) and polysaccharides, over a wide range of settings (pH 5.0–9.0, 25 °C to 37 °C). In addition, when starch was effectively degraded, 90% of the residual SCOD (<5000 mg/L) consisted mainly of proteins and volatile fatty acids (VFAs). In contrast, in the absence of active Bacillus cereus BX16, the residual polysaccharide and glucose concentration jumped to 20,000 mg/L. Ultimately, the unique biological method of treating starch waste with Bacillus cereus BX16 also proves the effectiveness of microbial treatment.
Published Version
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