METHOD OF SLUDGE PRETREATMENT FOR IMPROVED DIGESTIBILITY AND REDUCED SCALING
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United States of America
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Issued Date -
Dec 26, 2024
app pub date -
Jul 22, 2022
filing date -
Jul 22, 2022
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Abstract
A method of pretreating wastewater sludge including applying an amount of at least 0.01 g/g TSS Ca(ClO)2 to wastewater sludge to enhance digestibility of the sludge and reduce phosphorus concentration therein and then allowing sufficient time for the wastewater sludge to densify to a treated sludge having a specific resistance to filtration (SRF) of 3 to 4 (1010 m/Kg). The resulting treated sludge composition being sterilized, free of harmful bacteria, and useful as a fertilizer, particularly for growing mushrooms.
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