Abstract
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.
Highlights
Polyethylene (PE) is a plastic insulating material for electrical conductivity, malleable and hydrophobic [1]
Biotransformation of Oxodegradable low-density polyethylene (LDPEoxo) sheets in Vertical Microcosm Systems (VMS) and Horizontal Microcosm systems (HMS) During 135 days of treatment with P. ostreatus, the hydrophobicity of the LDPEoxo sheets was determined in HMS and VMS employing static contact angle (SCA)
In this work, the co-biodegradation of LDPEoxo pretreated with O2 plasma and lignocellulosic biomass (LCB) was assumed, by employing P. ostreatus, under controlled conditions, in two microcosm systems
Summary
Polyethylene (PE) is a plastic insulating material for electrical conductivity, malleable and hydrophobic [1]. Have been estimated that from 1950 to 2015, about 8.3 billion metric tons of plastic products, including PE, were produced, of which 6.3 billion metric tons became solid waste, of which 12% incinerated, while the remaining 79% was disposed of in landfills or inappropriately ended up in water bodies and natural ecosystems [2]. The excessive use and production of these non-degradable products have led to their accumulation; their control, proper disposal and waste treatment become very difficult. Besides the illegal dumping of solid waste, landfills influence the accumulation of LDPE in natural ecosystems due to torrential rains and landslides, among others [4]. The harmful effect of oxo-degradable lowdensity polyethylene (LDPEoxo) on ecosystems result from improper disposal of plastic waste after use. The 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
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
