Evaluation of two microcosm systems for co-treatment of LDPEoxo and lignocellulosic biomass for biochar production

Biomaterials Research

Laura C. Castillo-Carvajal¹  Raúl A. Poutou-Piñales²  Lucía A. Díaz-Ariza³  Alejandra Castillo-Toro⁴  Diana N. Céspedes-Bernal⁴  Leonardo Peña-Carranza⁴  Luis D. Gómez-Méndez⁴  Adriana I. Páez-Morales⁴  Aura M. Pedroza-Rodríguez⁴  Juan F. Mateus-Maldonado⁴  Juan C. Salcedo-Reyes⁵ 

[1] Facultad de Ciencias de la Salud, Universidad Anáhuac Campus Norte, Huixquilucan, Estado de México, Mexico;Laboratorio de Biotecnología Molecular, Grupo de Biotecnología Ambiental e Industrial (GBAI). Departamento de Microbiología. Facultad de Ciencias. Pontificia Universidad Javeriana, Bogotá, D.C., Colombia;Laboratorio de Interacciones Planta Suelo Microorganismos (LAMIC), Grupo de Investigación en Agricultura Biológica. Departamento de Biología. Facultad de Ciencias, Bogotá, D.C., Colombia;Laboratorio de Microbiología Ambiental y de Suelos, Unidad de Investigaciones Agropecuarias (UNIDIA). Departamento de Microbiología. Facultad de Ciencias. Pontificia Universidad Javeriana, Bogotá, Colombia;Laboratorio de Películas Delgadas y Nanofotónica. Departamento de Física. Facultad de Ciencias. Pontificia Universidad Javeriana, Bogotá, D.C., Colombia;

关键词: Malachite green;    Germination test;    Plastic roughness;    Oxo-biodegradable low-density polyethylene;   

DOI  :  10.1186/s40824-021-00222-w

来源: Springer

【 摘 要 】

BackgroundThe co-transformation of solid waste of natural and anthropogenic origin can be carried out through solid-state-fermentation systems to obtain bio-products with higher added value and lower environmental impact.MethodsTo evaluate the effect of Pleurotus ostreatus on co-transformation of oxo-degradable low-density polyethylene (LDPEoxo) sheets and lignocellulosic biomass (LCB), were assembled two 0.75 L microcosm systems in vertical (VMS) and horizontal (HMS) position. The pre-treated sheets with luminescent O2 plasma discharges were mixed with pine bark, hydrolyzed brewer’s yeast and paper napkin fragments and incubated for 135 days at 20 ± 1.0 °C in the presence of the fungus. With the co-transformation residues, biochar (BC) was produced at 300 ± 1.0 °C (BC300) for 1 h, then used to carry out adsorption studies, using the malachite green dye (MG) at pH 4.0, 7.0 and 9.0 ± 0.2. Finally, the biochar was the substrate for the germination of carnation seeds (Dianthus caryophyllus) and Ray-grass (Lolium sp.) in vitro.ResultsFor HMS, the decrease in static contact angle (SCA) was 63.63% (p = 0.00824) and for VMS 74.45% (p = 0.00219), concerning the pristine. Plastic roughness in VMS was higher (26%) concerning the control. Throughout the 135 days, there were fungal growth and consequently laccase (Lac), manganese peroxidase (MnP) and lignin peroxidase (LiP) activities. During the first 75 days, CO2 production increased to 4.78 ± 0.01 and 4.98 ± 0.01 mg g-1 for HMS and VMS, respectively. In MG adsorption studies, the highest amount of the colourant adsorbed at both pH 4.0 and 7.0 ± 0.2.ConclusionsFinally, the biochar or the biochar enriched with low concentrations of plant growth-promoting microorganisms and inorganic fertilizer favours the germination of Dianthus caryophyllus and Lolium sp., seeds.

【 授权许可】

CC BY