Abstract
This study investigates the waste cardboard (WCB) fungal pretreatment (Oligoporus placenta and Tremetes hirsuta) under monoculture and mixed culture and then composting for 35 d after mixing with cow dung in different ratios. Fungal pretreatment caused significant reduction in cellulose (28.3–35.8%), hemicellulose (61.4–68.4%), lignin (67.5–69.3%) content in WCB. Pretreated WCB showed better rates of decrement in total organic carbon (26.02–47.92%), carbon-to-nitrogen ratio (19.4–23.5), and lignocellulose contents, as well as incensement in total nitrogen (40.48–63.31%), total potassium (51.92–73.91%), germination index (88.5–102.0%), and elemental (Cu, Fe, Zn, Cr, and Mn) levels. Dehydrogenases (142–210 µg g−1h−1), and β-galactosidase (210–256 µg g−1h−1) activities indicates high microbial-mediated mineralization in setups. Results suggested that WCB could be used as a valuable substrate for valuable-added compost preparation after pretreating with a consortium of white-rot fungi.
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