Cleaner Waste Systems最新文献

{"title":"Motivating recycling behaviour: The role of deposit return systems and collection point design","authors":"Marie Hartmann,&nbsp;Elena Cavagnaro","doi":"10.1016/j.clwas.2025.100334","DOIUrl":"10.1016/j.clwas.2025.100334","url":null,"abstract":"<div><div>This preliminary applied research study explores the potential effectiveness of Deposit Return Systems (DRS) in encouraging recycling behaviour in a HORECA (Hotel, Restaurant, Café) setting. A DRS starts with the introduction of a deposit collection point to facilitate that the guests return the deposit-levied packaging that they purchased on the business premise. The central research question in this study addresses how to lead guests to proper recycling behaviour. Recycling behaviour is conceptualized as disposing of deposit cans and bottles in specific collection points. Although the success of sustainable initiatives depends both on guest behaviour and on product design, these two angles are seldom applied together in general and in HORECA in particular. To answer the central question, we combined behavioural sciences with design for sustainable behaviour in an exploratory manner. Consequently, we introduced different prompt communication strategies and deposit collection point nudges, to explore which combination is most successful in leading guests to proper recycling behaviour in a canteen setting. Examples of strategies are visual prompts and verbal instructions. To measure the success of the nudges and prompts two measures were used: the deposit-levied packaging that ended in the collection point or in the garbage bin was counted; the level of recycling contamination. Chi-square was applied to analyse the data. The study highlights that the presence of a collection point increases guests’ motivation to collect deposit-levied packaging separately. The results show that the design of the collection points played a crucial role in reducing recycling contamination, as crate shaped collection point resulted in less recycling contamination compared to a bin shaped one. The findings suggest that, with proper product design and communication, DRS can be effectively applied not only in school canteens but also in cafes, catering services, and other HORECA businesses. The study uniquely employed an exploratory approach in a real-life setting in a university canteen to test the different behavioural interventions.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"12 ","pages":"Article 100334"},"PeriodicalIF":0.0,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144366409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Production of protein biomass from Chlorella vulgaris using foliar fertilizer nutrients","authors":"Yesica Jhoana Benavides Escobar ,&nbsp;John Alexander Muelas Calambas ,&nbsp;Iván Dario Otero Ramírez ,&nbsp;Karen Sofia Muñoz-Pabon ,&nbsp;Jorge Luis Sánchez Ortega ,&nbsp;Jhon Edinson Nieto Calvache","doi":"10.1016/j.clwas.2025.100337","DOIUrl":"10.1016/j.clwas.2025.100337","url":null,"abstract":"<div><div>One of the main challenges for industries in microalgae cultivation is the cost of their culture media. In this study, the use of two foliar fertilizers as alternative and lower cost culture media (MFF) for the production of <em>Chlorella vulgaris</em> compared to a control medium (BG11) was analyzed. The results for the MFF showed that on day 7 cell counts of up to 1.11 × 10⁷ cells/mL were obtained, in addition to a biomass yield of up to 0.32 g.L⁻¹ with an N:P ratio of 20:1. The highest protein content with MFF was on day 7, reaching maximum values (on a dry basis, db) of 54 g/100 g, however, lipids (1.48 g/100 g db) were low compared to literature. In addition, antiradical activity was observed by DPPH and ABTS methods and reducing power by FRAP method, supported by the presence of phenolic compounds and carotenoids, which increased significantly (p &lt; 0.05) between day 7 and 10 of cultivation. It is concluded that the MFF allow obtaining a significant amount of protein biomass on day 7, comparable to that of a control culture medium and that in addition, this biomass is rich in bioactive compounds that increase with the depletion of nutrients in the medium.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"12 ","pages":"Article 100337"},"PeriodicalIF":0.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Green adsorption of oil and grease from wastewater using oil palm leaves activated carbon","authors":"Muhammad Raza Ul Mustafa ,&nbsp;Muhammad Usama Salim Gandapur ,&nbsp;Hifsa Khurshid","doi":"10.1016/j.clwas.2025.100330","DOIUrl":"10.1016/j.clwas.2025.100330","url":null,"abstract":"<div><div>Oil and grease contamination in wastewater poses a significant environmental threat due to its persistence and harmful ecological effects. Conventional treatment methods are often limited by high costs, inefficiency, and the risk of secondary pollution. This study investigates the use of oil palm leaves-based activated carbon (OPLAC) as a low-cost, environmentally friendly adsorbent for removing oil and grease from wastewater. A Central Composite Design (CCD) under Response Surface Methodology (RSM) was employed to optimize the process, resulting in 17 batch experiments. The model successfully predicted oil and grease removal efficiency. The regeneration and reusability study has also contributed to great results. It identifies optimal conditions at pH 6, 0.16 g adsorbent dosage, and 44 min contact time to achieve a high removal efficiency of 99.4 %. The Langmuir isotherm and pseudo-second-order kinetic models best describe adsorption data. Both have R² values of 0.99, confirming strong model fit and consistent adsorption behaviour. The regeneration and reusability efficiency of OPLAC was 92 %, 85 % and 77 % with a 15 % loss. These findings highlight the potential of OPLAC as a viable solution for treating oil- and grease-laden wastewater and as a means to valorize agricultural waste, contributing to circular economy practices and sustainable water management.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"12 ","pages":"Article 100330"},"PeriodicalIF":0.0,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144330741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pineapple peel waste enhances manure protein degradation: Statistical optimization","authors":"Noori M. Cata Saady,&nbsp;Tasnia Hasan Nazifa","doi":"10.1016/j.clwas.2025.100335","DOIUrl":"10.1016/j.clwas.2025.100335","url":null,"abstract":"<div><div>Animal farms generate large amounts of manure suitable as feedstock for producing biogas by anaerobic digestion (AD). However, AD encounters difficulties when manure contains excessive protein levels. This study investigates using pineapple peel waste (PPW)-derived protease enzyme (bromelain) to enhance manure’s protein degradation and improve biogas production. It aims to improve the degradation of manure protein and mitigate the inhibitory ammonia accumulation problem. The study applied a Box–Behnken design and analyzed the data using the Response Surface Methodology (RSM) to optimize protein reduction and diminish ammonia levels. It examined the single and two-way impacts of parameters such as manure dosage, PPW dosage, and degradation duration. The statistically derived optimal degradation conditions of 9 g VS_manure L⁻¹, 4 g VS_PPW L⁻¹, and 48 h degradation time achieved 36 ± 0.25 % protein reduction. However, the highest reduction of ammonia nitrogen (NH₃-N) of 72 ± 0.48 % was achieved under the optimal combinations of 6.5 g VS_manure L⁻¹, and 7 g VS_PPW L⁻¹ , and 48 h. Fourier Transform Infrared (FTIR) spectroscopy and Scanning Electron Microscopy (SEM) analyses revealed changes, particularly weakening and cleavage of hydrogen and amide I, II, and III bonds, confirming hydrolyzed manure's protein structural and morphological alterations. The hydrolyzed substrate characterization, paired with the rigorously developed statistical data, strongly supports using PPW as an effective agent to address the ammonia accumulation challenges. The PPW significantly and effectively enhances protein breakdown within manure, potentially increasing hydrogen and methane generation during AD.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"12 ","pages":"Article 100335"},"PeriodicalIF":0.0,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144307550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sustainable use of MDF waste in construction","authors":"Oly Vololonirina ,&nbsp;Louis Augé–Collomb ,&nbsp;Amandine Delfau ,&nbsp;Tiphaine De La Croix Vaubois ,&nbsp;Florence De Mengin Fondragon","doi":"10.1016/j.clwas.2025.100329","DOIUrl":"10.1016/j.clwas.2025.100329","url":null,"abstract":"<div><div>Medium-Density Fiberboard (MDF) has become a ubiquitous material in furniture and construction. However, its increasing use generates significant waste. This paper proposes an approach to addressing these challenges by exploring its potential use in construction to minimize incineration and landfilling. The first part of the paper consists in reviewing the current state of knowledge regarding MDF, the waste recovery techniques, and associated challenges. It shows that many methods were studied but were not developed on an industrial scale.</div><div>In the second part, we explain the materials and methods used to investigate the potential of incorporating MDF waste into concrete. For that, MDF waste was ground and used as substitution of coarse mineral aggregates with a mass proportion from 0 % to 9 %. As a very preliminary study, the parameters studied were limited to the density and absorption coefficient of the MDF aggregates and the compressive strength of concrete. The results showed that because of the high absorption coefficient of the organic aggregates, the slump of fresh concrete was between 3 and 14 cm and the compressive strength of hardened concrete samples at 12 days were below 5 MPa for samples containing GMDF. However, it is reasonable to predict that the compressive strength of specimens containing MDF waste can align with the requirements for non-structural lightweight concrete (below 17 MPa at 28 days) providing some improvements on the mixing formulation including adjustment of the water content by the treatment of GMDF prior to casting of concrete or fixing the water-to-cement ratio.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"12 ","pages":"Article 100329"},"PeriodicalIF":0.0,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144296803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design principles for city waste reduction: Addressing gaps in public reporting for zero waste","authors":"Jarnae Leslie ,&nbsp;Paul James Brown ,&nbsp;Susanne Pratt ,&nbsp;Melissa Edwards","doi":"10.1016/j.clwas.2025.100326","DOIUrl":"10.1016/j.clwas.2025.100326","url":null,"abstract":"<div><div>As cities respond to growing demands of waste management, what and how information is publicly reported is becoming more important. Despite the evolution of sophisticated reporting systems, inconsistent, incomplete, and misunderstood waste management data create gaps in public reporting and accountability. The objective of this research is to explore gaps in public disclosures of information about an active city waste management system to identify and understand barriers towards a waste reduction target. This paper presents a case study through desktop analysis of waste management reporting within a local government area in Sydney, Australia, where waste is managed between the local government (the City of Sydney) and industry stakeholders. Three key barriers to transparent, inclusive, and auditable public reporting were identified as impacting the city waste reduction target: (i) an ambiguous target, (ii) conflicting and inconsistent waste data, and (iii) incomplete disclosures. Seven design principles are derived to support the myriad of stakeholders required to achieve more impactful city waste reduction targets and contribute to the limited empirical studies of zero waste implementation. Namely, (i) Transparency in Existing Sustainability Commitments, (ii) Disclosure of Material Flows, (iii) Inclusion of Stakeholder Relationships, (iv) Identification and Disclosure of Gaps in Public Reporting, (v) Development of Detailed Target Definition and Action Plan, (vi) Development of Baseline Waste Data and Progress Reporting Timeline, and (vii) Development of Detailed Budget to Achieve Targets.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"12 ","pages":"Article 100326"},"PeriodicalIF":0.0,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144330744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimizing biogas production through the co-digestion of tannery fleshing, cowdung, and sewage water using response surface methodology","authors":"Shilpy Rani Basak,&nbsp;Ahmad Hasan Nury,&nbsp;Srijon Das Swarup,&nbsp;Md. Jahir Bin Alam,&nbsp;Md. Imran Kabir","doi":"10.1016/j.clwas.2025.100332","DOIUrl":"10.1016/j.clwas.2025.100332","url":null,"abstract":"<div><div>Tannery waste management presents a significant environmental challenge, as improper disposal practices lead to the contamination of land and water bodies. Anaerobic co-digestion has the potential to convert protein-rich tannery fleshing into renewable energy. However, the selection of substrates and its dosing as well as physicochemical properties remain the prime factors for energy production and optimization. Therefore, this study aims to optimize biogas production through the anaerobic co-digestion of tannery fleshing, cowdung, and sewage water using Central Composite Design, inclusive Response Surface Methodology. The impact of temperature (35–45°C), volatile solid (VS) concentration (3500–7000 mg/L), and substrate-to-inoculum ratio (S/I; 1–1.5) in biogas production have been investigated and analyzed using 19 batch experiments. The optimal temperature of 45°C, VS of 6800 mg/L, and S/I of 1.33 have been evaluated producing nearly 6700 mL of biogas (71 % of CH₄) after 35 days. The response surface model shows R² &gt; 99 % with no significant lack-of-fit in predicting the biogas production. These findings may lead to implementing circular bio-economy practices, promoting environmental sustainability, and producing efficient energy.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"12 ","pages":"Article 100332"},"PeriodicalIF":0.0,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144296804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recycling of inherently flame-resistant fabrics for protective clothing: A comprehensive review","authors":"GM Nazmul Islam ,&nbsp;Dave Kasper ,&nbsp;Ted Parker ,&nbsp;Patricia I. Dolez","doi":"10.1016/j.clwas.2025.100331","DOIUrl":"10.1016/j.clwas.2025.100331","url":null,"abstract":"<div><div>The accelerated consumption of flame-resistant (FR) fabrics increases the amount of textile waste. Moreover, aramids take a very long time to degrade in landfills and should not be incinerated. Mechanical recycling offers opportunities to tackle this challenge. Yet, limited information is available on this topic. The mechanical recycling process comprises collection of cleaned used FR garments, sorting of fabrics based on fibre content and color, removal of accessories, shredding, blending with virgin fibres, spinning into yarns, knitting/weaving, dyeing, and production of new FR garments. Remaining challenges include the presence of residual contaminants from prior fire exposure; reduction in fibre length after shredding; difficult balance between performance and cost; and dyeing conditions to accommodate the different fibres and residual color on the recycled fibres. Moving forward, researchers should optimize the processes from used garment collection to new FR garment production as well as develop solutions to remove the per- and polyfluoroalkyl substances (PFAS) liquid-repellent finishes from the fabrics prior to recycling. It will also be important to assess the long-term performance of fabrics made with recycled fibres. Combining the different expertise required to tackle these challenges will be key for mechanical recycling to improve the sustainability of FR protective clothing.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"12 ","pages":"Article 100331"},"PeriodicalIF":0.0,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144291055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of electro-fenton parameters for phenol degradation in portable toilet wastewater: Advancing towards sustainability","authors":"Brayan Alexis Parra-Orobio ,&nbsp;Yolanda Rico-Lizcano ,&nbsp;Jonathan Soto-Paz ,&nbsp;Luis Alfonso Guerra-Hernández ,&nbsp;Pablo César Manyoma-Velásquez ,&nbsp;Yorgi San Juan-Garisado ,&nbsp;Jesús David Álvarez-Trujillo ,&nbsp;Miguel Casallas Ojeda","doi":"10.1016/j.clwas.2025.100328","DOIUrl":"10.1016/j.clwas.2025.100328","url":null,"abstract":"<div><div>Wastewater from portable toilets (WWPT) is characterized by a variety of recalcitrant chemical compounds such as phenols and organics that are difficult to treat by conventional methods. However, WWPT treatment is scarce in literature, especially with a focus on sustainability. In this study, the Electro-Fenton (EF) process was used to remove phenols and organics from WWPT and to analyze the toxicity of the effluent for water reuse purposes. The experimental design used response surface methodology to determine the occurrence of operating parameters such as hydrogen peroxide dose (100, 174, 200 g L⁻¹) and current density (10, 50, 90 A m⁻²). The experiments were performed in a 3 L reactor in batch mode. It was found that the optimum operating conditions were 187 g L⁻¹ and 90 A m⁻², which allowed obtaining an effluent pH of 7.4, TSS removal of 87.6 % (418 mg L⁻¹), chemical oxygen demand of 96.4 % (191.5 mg L⁻¹), biological oxygen demand of 98 % (87 mg L⁻¹), phenols with 98 % (0.15 mg L⁻¹) and germination index of 108.9 %. This showed that treated WWPT can be used for irrigation. In terms of cost, the treatment could be US$ 0.88 L⁻¹. Overall, the EF process is presented as a suitable process to treat WWPT and reduce the pollution load on the environment.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"12 ","pages":"Article 100328"},"PeriodicalIF":0.0,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144271521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Toward high-performance green building: Influence of geopolymer and straw fiber on mechanical and thermal performance","authors":"Mohamed Char,&nbsp;Amine Tilioua","doi":"10.1016/j.clwas.2025.100327","DOIUrl":"10.1016/j.clwas.2025.100327","url":null,"abstract":"<div><div>Raw earth bricks were stabilized with a kaolin-based geopolymer binder activated by an alkaline solution, then reinforced with straw fibers to improve their mechanical and thermal performance. Formulations were prepared with a geopolymer content ranging from 0 % to 6 % by weight. The optimum 6 % formulation was combined with straw fiber contents ranging from 0 % to 1.5 % by weight. Samples were characterized for density, thermal conductivity, thermal diffusivity, mass heat capacity, volumetric heat capacity, thermal effusivity, compressive strength, and tensile strength. Incorporating the geopolymer significantly improved mechanical properties, with increased compressive strength from 0.892 MPa to 3.076 MPa and tensile strength from 0.114 MPa to 0.624 MPa. In parallel, a slight increase in thermal conductivity was observed, reaching 0.629 W/m.K for sample G6. Adding straw fibers to formulations containing 6 % geopolymer enabled a progressive reduction in thermal conductivity, reaching a minimum value of 0.316 W/m.K for 1.5 % fibers (G6F6). The volumetric heat capacity increased significantly to 3.0013 × 10⁶ J/m³ .K. At the same time, the thermal effusivity reached 973.12 W.s ¹ ᐟ²/m².K. Mechanically, tensile strength continued to grow with the addition of fiber, reaching 0.923 MPa. In contrast, compressive strength peaked at 5.217 MPa at 0.75 % fiber (G6F3) before decreasing at higher contents. These results show that an optimum compromise between thermal and mechanical performance is obtained for a straw fiber content of 0.75 % and 1 % by weight.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"12 ","pages":"Article 100327"},"PeriodicalIF":0.0,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144254938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}