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A novel process was developed to pretreat and store biomass concurrently.
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CaO2 loading and moisture content were critical to process performance.
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10% CaO2 loading and 80% moisture content were require to maintain alkaline pH.
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The reducing sugar yield of water hyacinth was enhanced by ∼2.5-fold.
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The process could be used to consolidate the pretreatment and storage of biomass.