Addition of fish pond sediment and rock phosphate enhances the composting of green waste. (June 2017)

• Record Type: Journal Article
• Authors: Zhang, Lu; Sun, Xiangyang
• Is Part Of: Bioresource technology. Volume 233(2017)
• Page Start: 116
• Page End: 126
• Publication Date: 2017-06
• Subjects: Cation exchange capacity -- Composting temperature -- Elemental composition -- Germination index -- Microbial biomass -- NH3 emission; 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.2017.02.073
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Fish pond sediment (FPS) and rock phosphate (RP) were added to composting materials. FPS and/or RP addition enhanced the degradation and humification of GW composting. Physico-chemical and microbiological properties explained the rapid decomposition. Temperature, NH3 emission, microorganisms, enzymes, and nutrients were optimized. Combination of 25% FPS and 15% RP reduced the two-stage composting time to 22 days. Abstract: The objective of this work was to study the two-stage composting of green waste (GW) as affected by addition of fish pond sediment (FPS; at 0, 25, and 35%) and/or rock phosphate (RP; at 0, 10, and 15%). The combined addition of FPS and RP greatly accelerated GW degradation and improved compost quality in terms of composting temperature, windrow volume, pH, electrical conductivity (EC), cation exchange capacity (CEC), NH3 emission, microbial biomass, enzyme activities, nutrient content, and seed germination. The two-stage composting was optimal with the combined addition of 25% FPS and 15% RP. In addition to producing the highest quality compost product, the optimal combination resulted a mature compost in only 22 days rather than in the 90–270 days required with traditional composting.