Improving green waste composting by addition of sugarcane bagasse and exhausted grape marc. (October 2016)

• Record Type: Journal Article
• Authors: Zhang, Lu; Sun, Xiangyang
• Is Part Of: Bioresource technology. Volume 218(2016)
• Page Start: 335
• Page End: 343
• Publication Date: 2016-10
• Subjects: Exhausted grape marc -- Green waste -- Sugarcane bagasse -- Two-stage composting; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2016.06.097
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Sugarcane bagasse (SCB) and exhausted grape marc (EGM) were added to compost. SCB and/or EGM enhanced the two-stage composting of green waste. Physico-chemical and microbiological properties explained the rapid decomposition. Temperature, water retention, microorganisms, enzymes, and nutrients were optimized. Combination of 15% SCB and 20% EGM reduced the two-stage composting time to 21 days. Abstract: The composting of lignocellulosic waste into compost is a potential way of sustainably disposing of a waste while generating a useful product. The current study determined whether the addition of sugarcane bagasse (SCB) (at 0, 15, and 25%) and/or exhausted grape marc (EGM) (at 0, 10, and 20%) improved the two-stage composting of green waste (GW). The combined addition of SCB and EGM improved composting conditions and the quality of the compost product in terms of temperature, water-holding capacity, particle-size distribution, coarseness index, pH, electrical conductivity, water-extractable organic carbon and nitrogen, microbial numbers, enzymatic activities, polysaccharide and lignin content, nutrient content, respiration, and phytotoxicity. The optimal two-stage composting and the best quality compost were obtained with the combined addition of 15% SCB and 20% EGM. With the optimized two-stage composting method, the compost matured in only 21 days rather than in the 90–270 days required for traditional composting.