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Objective: The goal of this research was to evaluate the influence of the incorporation of Sugarcane Filter Cake (SFC) as an amendment material (AM) on the process of biowaste (BW) composting and the quality of the final product. Methods: In this study the effect (in terms of stability, maturity and agricultural value) of SFC incorporation on four mixture proportions BW: SFC (100:00–control; 90:10; 80:20 and 70:30) was evaluated on a pilot scale. Results: The results show that overall, the incorporation of SFC enabled thermophilic temperatures to be achieved in a shorter time than the control treatment and improved the stability conditions (oxygen consumption <1.0 mgO2/gVSh), germination index (GI >80%: mature product) and quality product index (FI >3.5: high soil fertilization potential). The mixing ratio 80:20, showed the best product quality (highest total N content: 2.32%, TP: 1.42%, CEC: 65.5 meq/100 g), lower electrical conductivity (EC) value (0.38 dS/m) and total and fecal coliforms (15.3 and 4.0 NMP/g respectively), complying with technical standards (Colombian and Chilean) for organic products used as fertilizers and amendments or soil conditioners. In addition to demonstrating the best results of GI and FI (123.40% and 4.67 respectively), Objetivo: Evaluar cómo la incorporación de cachaza (CA) como material de enmienda, afecta la eficiencia del proceso y la calidad del producto final del compostaje de biorresiduos de origen municipal (BOM). Materiales y métodos: En este estudio se evaluó a escala piloto y en términos de estabilidad, madurez y valor agrícola, el efecto de la incorporación de CA sobre el compostaje de BOM en cuatro proporciones de mezcla BOM:CA (100:00– control; 90:10; 80:20 y 70:30). Resultados: Los resultados mostraron que en general, la incorporación de CA permitió alcanzar temperaturas termofílicas en menor tiempo que el tratamiento control y alcanzar mejores condiciones de estabilidad (consumo de oxígeno <1,0 mgO2/gSVh), Índice de Germinación (IG >80%: indicador de un producto maduro) e Índice de calidad de compost (IF >3,5: indicador de alto potencial de fertilización de suelos), siendo la proporción 80:20 la de mejor calidad del producto (mayor contenido de NT: 2,32%, PT: 1,42%, CIC: 65,5 meq/100g), menor valor de CE (0,38 dS/m) y de coliformes totales y fecales (15,3 y 4,0 NMP/g respectivamente), cumpliendo con normas técnicas como la colombiana y la chilena para productos orgánicos utilizados como fertilizantes y acondicionadores del suelo, además de los mejores resultados de IG e IF (123,40% y 4,67 respectivamente).

Objective: The goal of this research was to evaluate the influence of the incorporation of Sugarcane Filter Cake (SFC) as an amendment material (AM) on the process of biowaste (BW) composting and the quality of the final product. Methods: In this study the effect (in terms of stability, maturity and agricultural value) of SFC incorporation on four mixture proportions BW: SFC (100:00–control; 90:10; 80:20 and 70:30) was evaluated on a pilot scale. Results: The results show that overall, the incorporation of SFC enabled thermophilic temperatures to be achieved in a shorter time than the control treatment and improved the stability conditions (oxygen consumption <1.0 mgO2/gVSh), germination index (GI >80%: mature product) and quality product index (FI >3.5: high soil fertilization potential). The mixing ratio 80:20, showed the best product quality (highest total N content: 2.32%, TP: 1.42%, CEC: 65.5 meq/100 g), lower electrical conductivity (EC) value (0.38 dS/m) and total and fecal coliforms (15.3 and 4.0 NMP/g respectively), complying with technical standards (Colombian and Chilean) for organic products used as fertilizers and amendments or soil conditioners. In addition to demonstrating the best results of GI and FI (123.40% and 4.67 respectively), Objetivo: Evaluar cómo la incorporación de cachaza (CA) como material de enmienda, afecta la eficiencia del proceso y la calidad del producto final del compostaje de biorresiduos de origen municipal (BOM). Materiales y métodos: En este estudio se evaluó a escala piloto y en términos de estabilidad, madurez y valor agrícola, el efecto de la incorporación de CA sobre el compostaje de BOM en cuatro proporciones de mezcla BOM:CA (100:00– control; 90:10; 80:20 y 70:30). Resultados: Los resultados mostraron que en general, la incorporación de CA permitió alcanzar temperaturas termofílicas en menor tiempo que el tratamiento control y alcanzar mejores condiciones de estabilidad (consumo de oxígeno <1,0 mgO2/gSVh), Índice de Germinación (IG >80%: indicador de un producto maduro) e Índice de calidad de compost (IF >3,5: indicador de alto potencial de fertilización de suelos), siendo la proporción 80:20 la de mejor calidad del producto (mayor contenido de NT: 2,32%, PT: 1,42%, CIC: 65,5 meq/100g), menor valor de CE (0,38 dS/m) y de coliformes totales y fecales (15,3 y 4,0 NMP/g respectivamente), cumpliendo con normas técnicas como la colombiana y la chilena para productos orgánicos utilizados como fertilizantes y acondicionadores del suelo, además de los mejores resultados de IG e IF (123,40% y 4,67 respectivamente).

The intensive breeding of beef cattle in Juncosa de les Garrigues (Catalonia, Spain) leads to the production of a large volume of manure that needs appropriate management. Land application in the area at agronomic rates is not enough to ensure good management practices, making necessary extended on-farm storage and the export of part of the production to long distances. In this context, the implementation of a collective treatment based on composting could help in enhancing the handling of manure. We assessed a full-scale composting process based on turned windrows (W), and involving treatment of beef cattle manure (CM) alone (two typologies were considered according to carbon-to-nitrogen ratios of ~25 (CM1, W1) and ~14 (CM2, W2)), or mixed with bulking agent (CM2/BA, W3) and dewatered digested sewage sludge (CM2/BA/DDSS, W4). Composting significantly improved the transportability of nutrients (final volumes were 40–54% of the initial volume). Temperature >55°C was reached in all the treatments but following different time patterns. Under the applied conditions of turning and rewetting, 14 weeks of processing did not ensure the production of stable, and mature, compost. Thus, only compost from W1 attained the maximum degree of stability as well as concentration of ammonium–N < 0.01% (with ammonium–N/nitrate–N ratio of 0.2) and low phytotoxicity. However, high pH, salinity, and heavy metal contents (Cu and Zn) may limit its final use. Addition of BA was advised to be kept to minimum, whereas use of DDSS as a co-substrate was not recommended in agreement to the higher loss of N and levels of heavy metals in the final compost., Postprint (updated version)