Industrial Biowastes Research Articles

Characterization of fresh biowastes for biogas production and environmental health in Niger Delta, Nigeria

BackgroundEnvironmental pollution is a public health problem in Niger Delta, Nigeria. Therefore, the aims of the present study were to: identify the major fresh biowastes in Bayelsa State, Niger Delta; quantify the biogas yields from mono-digestion and co-digestion of identified biowastes; determine the first day of biogas production during hydraulic retention time; assess pH variations during anaerobic digestion; and evaluate biogas flame colours.MethodsFifteen communities in Bayelsa State were randomly selected, and on-the-spot assessment and quantification of the biowastes found in each community were carried out daily per week. Mono-digestion of 20 kg of each biowaste and co-digestion of 10 kg of animal waste with 10 kg of plant waste were carried out respectively under anaerobic conditions. Cumulative biogas yield and pH were measured using a pH meter and weighing scale respectively. Biogas flame colours during combustion were visually assessed.ResultsExactly 120.61 metric ton of fresh biowastes was found to be generated per week in Bayelsa State, Niger Delta. Industrial biowastes were the highest [47.6 tonnes, (39.46%)], followed by abattoir biowastes [33 tonnes (27%)], market and roadside sellers biowastes [25.5 tonnes (21.14%)], and farm biowastes [14.51 (12.03%)]. Biogas yields (kg) were: 0, 0, 0, 0, 0, 17, 14, 2, 18, 16, 17, 15 and 1 kg for palm oil mill effluent (POME), orange fruit waste (OFW), pineapple peels (PP), plantain peels, cassava mill effluent (CME), rumen digesta (RD), cow dung, sewage, PP-RD, plantain peels-cow dung, POME-rumen digesta, OFW-cow dung, and CME-sewage respectively. The first day of biogas production for RD, cow dung, sewage, PP-RD, plantain peels-cow dung, POME-RD, OFW-cow dung, and CME-sewage was on the 6th, 32nd. 56th, 1st, 26th, 18th, 25th, and 60th day of hydraulic retention time respectively. A dominant blue flame colour mixed reddish yellow or orange flames were found during biogas combustion. A slight increase in pH was found in all the biodigester media.ConclusionsIn the present study, a variety of biowastes yielding various quantities and qualities of biogas were identified in Bayelsa State, Niger Delta. The study’s findings have provided evidence-based data that might be explored as a road map and catalyst for policy creation against inadequate biowaste management and as sustainable alternatives to the expensive liquefied petroleum gas. The potential of current research study to be scaled up for commercial use is implicated in the present study.

The water extracts from the oil cakes of Prinsepia utilis repair the epidermal barrier via up-regulating Corneocyte Envelope-proteins, lipid synthases, and tight junction proteins

Ethnopharmacological relevancePrinsepia utilis Royle, native to the Himalayan region, has a long history of use in traditional medicine for its heat-clearing, detoxification, anti-inflammatory, and analgesic properties. Oils extracted from P. utilis seeds are also used in cooking and cosmetics. With the increasing market demand, this extraction process generates substantial industrial biowastes. Recent studies have found many health benefits with using aqueous extracts of these biowastes, which are also rich in polysaccharides. However, there is limited research related to the reparative effects of the water extracts of P. utilis oil cakes (WEPUOC) on disruptions of the skin barrier function. Aim of the studyThis study aimed to evaluate the reparative efficacy of WEPUOC in both acute and chronic epidermal permeability barrier disruptions. Furthermore, the study sought to explore the underlying mechanisms involved in repairing the epidermal permeability barrier. Materials and methodsMouse models with induced epidermal disruptions, employing tape-stripping (TS) and acetone wiping (AC) methods, were used. The subsequent application of WEPUOC (100 mg/mL) was evaluated through various assessments, with a focus on the upregulation of mRNA and protein expression of Corneocyte Envelope (CE) related proteins, lipid synthase-associated proteins, and tight junction proteins. ResultsThe polysaccharide was the major phytochemicals of WEPUOC and its content was determined as 32.2% by the anthranone-sulfuric acid colorimetric method. WEPUOC significantly reduced transepidermal water loss (TEWL) and improved the damaged epidermal barrier in the model group. Mechanistically, these effects were associated with heightened expression levels of key proteins such as FLG (filaggrin), INV (involucrin), LOR (loricrin), SPT, FASN, HMGCR, Claudins-1, Claudins-5, and ZO-1. ConclusionsWEPUOC, obtained from the oil cakes of P. utilis, is rich in polysaccharides and exhibits pronounced efficacy in repairing disrupted epidermal barriers through increased expression of critical proteins involved in barrier integrity. Our findings underscore the potential of P. utilis wastes in developing natural cosmetic prototypes for the treatment of diseases characterized by damaged skin barriers, including atopic dermatitis and psoriasis.

Aerated Static Pile Composting for Industrial Biowastes: From Engineering to Microbiology.

This work demonstrated the feasibility of an industrial-scale aerated static pile composting system for treating one of the common biowastes-soybean curd residue. The mixing ratios of the feedstock were optimized to achieve a carbon-nitrogen ratio and a moisture level in the ranges of 25-35 and 60-70%, respectively. This open-air composting system required 6-7 months to obtain a mature compost. Solvita and seed germination tests further confirmed the maturity of the compost, with 25% compost extract concentration yielding the best germination index in the absence of phytotoxicity. The bacterial and fungal compositions of the compost piles were further examined with metagenomic analysis. Thermoactinomyces spp., Oceanobacillus spp., and Kroppenstedtia spp. were among the unique bacteria found, and Diutina rugosa, Thermomyces dupontii, and Candida taylorii were among the unique fungi found in the compost piles, suggesting the presence of good microorganisms for degrading the organic biowastes.

New Trends in Supercritical Fluid Technology and Pressurized Liquids for the Extraction and Recovery of Bioactive Compounds from Agro-Industrial and Marine Food Waste.

Growing consumer interest in healthy foods has led to an increased demand for bioactive compounds derived from eco-technologies. This review highlighted two emerging technologies, pressurized liquid extraction (PLE) and supercritical fluid extraction (SFE), which are based on clean processes aimed at recovering bioactive compounds from different food sources. We studied how the different processing conditions provide many advantages and a great opportunity to obtain compounds with antioxidant, antibacterial, antiviral, or antifungal activity from plant matrices and industrial biowaste, especially antioxidant compounds (anthocyanins and polyphenols) due to their important role in health promotion. Our research was conducted through a systematic search in different scientific databases related to the PLE and SFE topics. The review analyzed the optimal extraction conditions using these technologies, which lead to the efficient extraction of bioactive compounds, the use of different equipment, and recent combinations of SFE and PLE with other emerging technologies. This has given rise to the development of new technological innovations, new commercial applications, and the detailed recovery of various bioactive compounds extracted from different plant and marine life food matrices. These two environmentally friendly methodologies are fully valid and have great future application prospects in biowaste valorization. They represent a feasible technological tool that can promote the implementation of a circular economy model for the food industry. The underlying mechanisms of these techniques were discussed in detail and supported by current literature.

Valorization of persimmon calyx, an industrial biowaste, as a potential resource for antioxidant production

Valorization of persimmon calyx, an industrial biowaste, as a potential resource for antioxidant production

One-step fabrication of size-controllable, biowaste-templated Li4SiO4 spherical pellets via freeze-drying method for cyclic CO2 capture

High-temperature cyclic CO2 capture based on Li4SiO4 adsorbent has drawn extensive attentions in recent decades. Especially, the fabrication of Li4SiO4 adsorbent pellets with sufficient mechanical strength has been considered as an essential precondition for achieving its practical looping application. In this work, size-controllable Li4SiO4 spherical pellets were one-step fabricated via a novel freeze-drying method. And a typical industrial biowaste, bagasse, was employed as a low-cost and carbon–neutral pore-forming agent to enhance the CO2 capture performance of freeze-dried Li4SiO4 pellets. It is investigated that as the increasing of liquid-to-solid ratio, the diameter of pellets gradually decreases from 2.3 mm to 0.9 mm and the interior structure becomes dense and nonporous, resulting in the inhibition of CO2 capture capacity and the enhancement of mechanical strength. As a result, the LP2.5 exhibit a capacity of 0.15–0.17 g CO2/g adsorbent while that of LP7.5 decreases to only 0.07 g/g. To compensate this capacity decline, the biowaste bagasse was further acted as the pore-forming agent to improve the porosity and structure of LP 7.5 pellets, leading to an effective capacity promotion of 0.04–0.06 g/g. Meanwhile, however, it also leads to a slight decline of mechanical strength. All of above conclusions contribute to the future development and practical applications of Li4SiO4 adsorbent pellets.

Repurposing Xylan Biowastes for Sustainable Household Detergents

Seeking sustainable and biocompatible detergent remains a big challenge. In this work, we report a new type of polysaccharide nanocrystal that is extracted from available industrial xylan biowastes via mild ammonium persulfate (APS) aqueous oxidation, which subsequently serves as a sustainable household detergent. By carefully adjusting the oxidation conditions (∼0.5 M, 60 °C), plate xylan hydrated nanocrystals (XNCs) can be accessed in reasonable yield (∼23%) with diameters of 30–50 nm and thicknesses of 5–12 nm. In comparison to the cellulose nanocrystal (CNC), the crystalline structure of XNCs demonstrates remarkable humidity-dependent behavior. Additionally, the acetylated xylan nanocrystals (AXNCs) exhibit high surface/interface activity to form stable Pickering emulsions, intriguing cleaning efficiency in removing stains from fabric surfaces, and the capability to de-wet oil from various types of tableware material. Seed germination, crop growth, and aquatic ecotoxicological evaluation demonstrate that AXNCs show no toxicity toward plants and zebrafish (median lethal concentration > 20,000 mg/L) with which they can be applied either as eco-friendly laundry or kitchen detergents. Our work presents a new avenue for converting industrial biowastes into sustainable household materials.

Heterogeneous catalytic activation of persulfate for the removal of rhodamine B and diclofenac pollutants from water using iron-impregnated biochar derived from the waste of black seed pomace

Waste reutilization in environmental remediation is highly desired as a new strategy in the scientific community for environmental applications. Industrial biowaste has been used significantly to produce biochar, which can be used in environmental remediation. In this study, a low-cost iron-impregnated modified biochar (FeBS800) was successfully prepared using a one-step pyrolysis method with waste black seed pomace as a “waste-to-resource” strategy and applied to activate peroxydisulfate (PDS) for the degradation and mineralization of rhodamine B (RhB) and diclofenac (DCF) in water. The physicochemical properties of the FeBS800 catalyst were investigated by various characterization analytical methods. The developed FeBS800 catalyst exhibits excellent catalytic activity and good stability in PDS activation. In the FeBS800/PDS system, the degradation efficiency within 10 min reached up to 98.2 % and 88.3 %, while the mineralization efficiencies within 30 min reached 48 % and 68.7 % for 20 mg/L RhB and DCF, respectively, with slight iron ions leaching of less than 3 mg/L. The optimum removal conditions of the FeBS800/PDS system were found to be 1.5 g/L catalyst dose and 10 mM PDS initial concentration at circumneutral pH solution. Moreover, the radical quenching experiment revealed that the main reactive oxygen species (ROS) responsible for the pollutants’ degradation in FeBS800/PDS system are in the order of 1O2 > •OH > O2•- > SO4•-, while singlet oxygen plays a leading role. The degradation kinetics of both pollutants (RhB and DCF) were well-fitted to the pseudo-first-order model. Furthermore, a possible mechanism pathway of PDS activation for generation ROS in the FeBS800/PDS system was proposed. Overall, the research results suggested that the modified FeBS800 could have a promising potential in activating PDS for the removal of refractory organic pollutants from water.

Top-Down Production of Sustainable and Scalable Hemicellulose Nanocrystals.

Polysaccharide nanocrystals have led to the development of multifunctional and sustainable materials, but most are glucose-based carbohydrates derived from valuable natural sources. Here, we present a top-down strategy that enables one, for the first time, to isolate xylose-based hemicellulose nanocrystals from available industrial biowastes. By leveraging the selective oxidation of alkaline periodate, as high as 34 wt % solid yield is accessible. The hemicellulose nanocrystals exhibit platelet-like shapes (10-20 nm thickness, 30-80 nm wide), crystalline features, and superior dispersibility in water. We also showcase their successful interface applications for one-dimensional (1D) carbon nanotube (CNT) nanoinks and two-dimensional (2D) transition-metal dichalcogenide (TMD) nanozymes, which are comparable to the traditional cellulose nanocrystals. The scalable, low-cost, and sustainable hemicellulose nanocrystals can be envisioned to provide an alternative for glucose-based polysaccharide nanocrystals, as well as hold promise for the high-value utilization of biowastes.

Rapid, selective, and room temperature dissolution of crystalline xylan by a hydrotrope

Selective dissolution of industrial biowaste is of significant importance for the valorization of biomass. Especially, fractionation of polysaccharides with similar structures is more challenging. Herein, a new kind of cationic hydrotrope, tetraethylammonium hydroxide (TEAH), has been developed for rapid, efficient, and selective dissolution of industrial biowastes-xylan type hemicelluloses from viscose fiber mills. When the concentration of TEAH is 15 wt%, the solubility of industrial crystalline xylan reaches to 13.39 wt% at room temperature. Crystalline or amorphous xylan can be regenerated by adding water or ethanol, with 57.98 % and 95.45 % yields, respectively. Additionally, we showcase hemicelluloses were near-completely extracted from holocellulose without degrading cellulose under ambient temperature by simply adjusting the concentration of TEAH, demonstrating the advantage of the hydrotropic feature. This hydrotrope solvent system features selective, rapid, and room temperature dissolution polysaccharides, which will shed new light in technological applications of the industrial spinning or biorefining processes.

Hydrothermal Carbonization of Spent Coffee Grounds for Producing Solid Fuel

Spent coffee grounds (SCG) are industrial biowaste resulting from the coffee-brewing process, and they are often underutilized and end up in landfills, thereby leading to the emission of toxic gases and environmental damage. Hydrothermal carbonization (HTC) is an attractive approach to valorize wet biomass such as SCG to valuable bioproducts (i.e., hydrochar). Thus, in this work, the HTC of SCG was carried out in a 500 L stainless steel vessel at 150, 170, 190, 210, and 230 °C for 30 min, 60 min, 90 min, and 120 min and a feedstock to water weight ratio of 1:5, 1:10, and 1:15, and the use of the resulting hydrochar as a solid fuel was evaluated. The results showed that a high energy recovery (83.93%) and HHV (23.54 MJ/kg) of hydrochar was obtained at moderate conditions (150 °C, 30 min, and feedstock to water weight ratio of 1:5) when compared with conventional approaches such as torrefaction. Following this, the surface morphology, functionality, and combustion behavior of this hydrochar were characterized by SEM, FTIR, and TGA, respectively. In short, it can be concluded that HTC is an effective approach for producing solid fuel from SCG and the resulting hydrochar has the potential to be applied either in domestic heating or large-scale co-firing plants.

Application of organic wastes to soils and legislative intricacies in a circular economy context

Currently, the absence of specific regulations on soil fertilization gives rise to sectorial normative with different regional approaches regarding application conditions, quality and other conditions that reused materials must meet. The purpose of this case study in Galicia (NW Spain) is to analyse the coherence of legal texts in the application of organic waste in soils regarding a more circular economy. The context of the case study is characterized by several Directives such as the Nitrates Directive or the "out of date" Directive on sewage sludge, among others, the lack of soil quality protection regulations and the existence of different administrative levels (European Union, Member State and Region). Manures and other agriculture wastes represent the main source of wastes being vastly applied to soils without previous treatment. Other waste streams (i.e. industrial biowaste, municipal biowaste and sewage sludge) undergo treatment generating commercial fertilizers, biostabilized wastes, technosols and waste-treated products that are subject to different standards. The screening of regulations and scientific literature detected limiting situations in the recycling of organic wastes due to natural or legal issues. On the other hand, risky applications are identified due to the lack of quality requirements for waste-treated products under regional legislation, or no mandatory compliance with codes of good agricultural practices for manures and waste-treated products. Contradictory situations of legal regulations and other issues were outlined and discussed. Final considerations were outlined to promote a more effective recycling of organic wastes and the design of a suitable legislation adapted to the natural conditions of the region.Graphical abstract

Hydrothermal co-carbonization of industrial biowastes with lignite toward modified hydrochar production: Synergistic effects and structural characteristics

Attempts to prepare high-grade and clean solid fuels from biowastes and low-rank coals are essential for protecting the environment and utilizing the energy from low-grade resources. The improvement of hydrothermal carbonization (HTC) and co-carbonization (co-HTC) on the upgrading and denitrogenation capabilities of industrial biowastes with low-rank coal as lignite (LC) was evaluated at 120–300 °C. The results demonstrated that coupled upgrading and denitrogenation occurred with a more intense effect on industrial biowastes than LC during the HTC process. For co-HTC in the prevailing hydrolysis (180 °C) or polymerization (240 °C) stage, an optimal mixing ratio of industrial biowaste/LC of 1:1–3:1 could result in an enhanced experimental calorific value, energy recovery efficiency, nitrogen removal efficiency, and weakened experimental nitrogen content, demonstrating the significant positive synergies on both upgrading and denitrogenation capabilities. The corresponding synergistic coefficients were maximized at 7% and − 23% for the calorific value and nitrogen content of hydrochars, respectively. The combined analyses of XPS, 13C NMR, and FTIR could provide evidence that these synergies of co-HTC were intrinsically associated with LC: (1) its more stable carbon and nitrogen functionalities; (2) promotion of its components or reaction sites on prevailing hydrolysis and polymerization reactions at corresponding temperature stages.

Sodium Lignosulfonate: an Industrial Bio-Waste for the Colouration and UV Protective Finish of Nylon Fabric

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Evaluation on the enhanced solid biofuel from co-hydrothermal carbonization of pharmaceutical biowastes with lignite

Pharmaceutical biowastes are typical wet low-grade industrial biowastes, exhibiting a dual characteristic of hazardous waste and renewable resource. Their efficient and clean energy utilization is important and indispensable from the viewpoint of environmental protection and resource savings. However, low energy density and high nitrogen content are two typical defective characteristics to be resolved. In this study, targeting at solid biofuel product, co-hydrothermal carbonization of two pharmaceutical biowastes (Chinese herb residue and antibiotic fermentation residue) with a low-rank coal (ShenMu lignite coal, SLC) were performed at a fixed prevailing temperature (240 °C) and different mixing mass ratios. The compositional features, the structural properties, and the thermo-chemical behaviors of co-hydrochar products were evaluated to determine their fuel properties. The results indicated that co-hydrothermal carbonization of pharmaceutical biowastes with 25–50% SLC could achieve favorable energy recoveries and nitrogen removal for the reaction system. Under the circumstances, notable synergistic enhancements on both upgradation and denitrogenation capabilities were revealed, producing compatible co-hydrochar with high energy density (HHV up to 24–25 MJ/kg) and stable nitrogen structures (nitrogen content as low as 1.4–2.0 wt%). Furthermore, compared to feedstock or mono-hydrochar, co-hydrochar product exhibited better pyrolysis behavior with less N-containing and incombustible gaseous components, and longer combustion process with more stable flame. Thus, co-hydrothermal carbonization with lignite coal would be a potential strategy to transform pharmaceutical biowastes into clean and high-grade solid biofuel.

Effects of the use of agricultural ashes, metakaolin and hydrated-lime on the behavior of self-compacting concretes

Self-compacting concrete (SCC) is an innovative product, which has fluidity and cohesion to cover the entire length of the piece and fill the spaces between reinforcement. However, currently, its use in construction sites is linked to a high consumption of cement. This generates a series of environmental problems such as depletion of natural resources and increased CO2 emissions. To mitigate these environmental problems, it is necessary to seek supplementary, locally available materials, to provide a sustainable and efficient way forward for the construction industry. In this perspective, this research investigates the effects of the use of metakaolin (MK), sugar cane bagasse ash (SCBA), rice husk ash (RHA) and hydrated-lime (HL) on rheological (slump flow, J-ring and V-funnel), mechanical (compressive strength) and durability (electrical resistivity, accelerated carbonation and mercury intrusion porosimetry) behavior in SCC. Portland Cement was replaced from 0% to 60% by mineral admixtures in mixtures with and without 10% HL. The results indicated that the SCC produced with agricultural ashes presented physical behaviors compatible with the standards and obtained compressive strength equivalent to the reference SCC (REF). Moreover, these concretes presented carbonation depth lower than the normative values and electrical resistivity significantly higher than the SCC-REF, reducing the probability of corrosion of the steel bars and, therefore, validating the use of ash obtained from industrial bio-waste in the production of SCC. The HL also presented itself as a good re-alkalizer of the cement matrix.

Comprehensive Characterization of Industrially Discarded Cymbopogon Flexuosus Stem Fiber Reinforced Unsaturated Polyester Composites: Effect of Fiber Length and Weight Fraction

ABSTRACT Industrial biowaste used as reinforcing materials for polymer composites has attained paramount importance. In this work, biowaste such as Cymbopogon flexuosus stem fiber (CFSF) was reinforced with unsaturated polyester. The results confirmed the enhancement of the mechanical properties with an increase of up to 30 wt.% fiber content and fiber length up to 40 mm. However, further addition declines the properties due to debonding of fiber with the matrix as identified by SEM analysis carried out in fractured specimens. It was also observed that the incorporation of CFSF decreased the rate of water absorption and increased the composite thermal stability.

Luminescent hybrid biocomposite films derived from animal skin waste

The leather industry generates approximately ten million tons of solid bio-wastes that can be used to synthesize various multifunctional materials with exciting properties. One such approach involves developing advanced hybrid materials, which is considered one of the key areas but the underdeveloped materials science discipline. This work explored methods to use collagen derived from leather industry bio-wastes to form hybrid films via two different ways: to produce luminescent carbon dots (Cdots) and develop hybrid films. The polymeric collagen was mixed with Cdots and reduced graphene oxide (rGO) to create flexible composite films that exhibit improved thermal, mechanical, electrical, and luminescent properties. The Cdot films displayed enhanced luminescence. The Kubelka-Munk transformation of the diffuse reflectance reveals a massive increase in absorbance in the visible light region with the addition of rGO. Besides, the developed films displayed electrical conductivity and weak ferromagnetic characteristics and showed enhanced biocompatibility. These findings highlight new avenues for converting industrial bio-wastes into useful multifunctional materials in scalable and inexpensive ways, thereby diminishing environmental pollution and enhancing environmental sustainability.

Proteins from Agri-Food Industrial Biowastes or Co-Products and Their Applications as Green Materials.

A great amount of biowastes, comprising byproducts and biomass wastes, is originated yearly from the agri-food industry. These biowastes are commonly rich in proteins and polysaccharides and are mainly discarded or used for animal feeding. As regulations aim to shift from a fossil-based to a bio-based circular economy model, biowastes are also being employed for producing bio-based materials. This may involve their use in high-value applications and therefore a remarkable revalorization of those resources. The present review summarizes the main sources of protein from biowastes and co-products of the agri-food industry (i.e., wheat gluten, potato, zein, soy, rapeseed, sunflower, protein, casein, whey, blood, gelatin, collagen, keratin, and algae protein concentrates), assessing the bioplastic application (i.e., food packaging and coating, controlled release of active agents, absorbent and superabsorbent materials, agriculture, and scaffolds) for which they have been more extensively produced. The most common wet and dry processes to produce protein-based materials are also described (i.e., compression molding, injection molding, extrusion, 3D-printing, casting, and electrospinning), as well as the main characterization techniques (i.e., mechanical and rheological properties, tensile strength tests, rheological tests, thermal characterization, and optical properties). In this sense, the strategy of producing materials from biowastes to be used in agricultural applications, which converge with the zero-waste approach, seems to be remarkably attractive from a sustainability prospect (including environmental, economic, and social angles). This approach allows envisioning a reduction of some of the impacts along the product life cycle, contributing to tackling the transition toward a circular economy.

Blends of Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate) with Fruit Pulp Biowaste Derived Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate-co-3-Hydroxyhexanoate) for Organic Recycling Food Packaging.

In the present study, a new poly(3-hydroxybutyrate-co-3-hydroxyvalerate-co-3-hydroxyhexanoate) [P(3HB-co-3HV-co-3HHx)] terpolyester with approximately 68 mol% of 3-hydroxybutyrate (3HB), 17 mol% of 3-hydroxyvalerate (3HV), and 15 mol% of 3-hydroxyhexanoate (3HHx) was obtained via the mixed microbial culture (MMC) technology using fruit pulps as feedstock, a processing by-product of the juice industry. After extraction and purification performed in a single step, the P(3HB-co-3HV-co-3HHx) powder was melt-mixed, for the first time, in contents of 10, 25, and 50 wt% with commercial poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV). Thereafter, the resultant doughs were thermo-compressed to obtain highly miscible films with good optical properties, which can be of interest in rigid and semirigid organic recyclable food packaging applications. The results showed that the developed blends exhibited a progressively lower melting enthalpy with increasing the incorporation of P(3HB-co-3HV-co-3HHx), but retained the PHB crystalline morphology, albeit with an inferred lower crystalline density. Moreover, all the melt-mixed blends were thermally stable up to nearly 240 °C. As the content of terpolymer increased in the blends, the mechanical response of their films showed a brittle-to-ductile transition. On the other hand, the permeabilities to water vapor, oxygen, and, more notably, limonene were seen to increase. On the overall, this study demonstrates the value of using industrial biowaste derived P(3HB-co-3HV-co-3HHx) terpolyesters as potentially cost-effective and sustainable plasticizing additives to balance the physical properties of organic recyclable polyhydroxyalkanoate (PHA)-based food packaging materials.