{"title":"Behaviors of useful bacterial communities associated with the cultivation of Aurantiochytrium sp. strain L3W using fermented wastes at different pH values","authors":"Toshikazu Suenaga, Erina Shimura, Brilian Pamungkas, Takehiko Gotoh, Wataru Nishijima, Satoshi Nakai","doi":"10.1007/s10163-025-02182-y","DOIUrl":"10.1007/s10163-025-02182-y","url":null,"abstract":"<div><p><i>Aurantiochytrium</i> sp. strain L3W is a halophilic and heterotrophic microorganism that produces polyunsaturated fatty acids. Fermented foods may contain lactic acid bacteria with potential probiotic effects. Here, we investigated whether a biomass mixture containing both polyunsaturated fatty acids and lactic acid bacteria can be produced as a functional eco-feed for poultry by culturing <i>Aurantiochytrium</i> sp. strain L3W using unsterile fermented food wastes, specifically <i>Hiroshimana</i> old pickles and rice vinegar production residue, at pH 4 and 7. The biomass mixture produced at both pH values contained polyunsaturated fatty acids. At pH 4, the dominant bacteria were lactic acid bacteria, such as <i>Lactobacillus sakei</i> and <i>Lactobacillus coryniformis</i>, for which probiotic effects have been reported, whereas at pH 7, lactic acid bacteria comprised a minor component of the biomass. The isolated lactic acid bacteria tolerated acidic conditions (~ pH 4). Prevalent pathogenic bacteria <i>Salmonella</i>, <i>Vibrio</i>, and <i>Campylobacter</i> were not detected in the food wastes. The results confirmed the feasibility of producing a functional feed additive for poultry not only to enrich polyunsaturated fatty acids in eggs but also to create a healthy intestinal environment by culturing <i>Aurantiochytrium</i> sp. strain L3W at pH 4 using fermented food waste in the absence of pathogens.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"27 3","pages":"1406 - 1417"},"PeriodicalIF":2.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10163-025-02182-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Eric Parfait Ze, Théodore Tchotang, Wolfgang Nzié, Wilfried Boade Nyame, Mpoung Léon Arnaud, Théophile Tchakounté Mbakop
{"title":"Recycling of Carica papaya trunk fiber plies: experimental and analytical characterization","authors":"Eric Parfait Ze, Théodore Tchotang, Wolfgang Nzié, Wilfried Boade Nyame, Mpoung Léon Arnaud, Théophile Tchakounté Mbakop","doi":"10.1007/s10163-025-02190-y","DOIUrl":"10.1007/s10163-025-02190-y","url":null,"abstract":"<div><p>The main aim of this work is to show that it is possible to use <i>Carica papaya</i> trunk fiber plies as honeycomb cores in sandwich structures. To achieve this, the plies were extracted using the traditional method (water retting). Chemical and physical characterization of the plies yielded 54% cellulose, 23% hemicellulose and 22% lignin, with a crystallinity index of 45.39% and a density of 0.644 g/cm<sup>3</sup>. SEM data showed a rough microfiber tangle. Mechanical tests produced a Young's modulus of 8.73 GPa, a stress at break of 58.98 MPa, a maximum elongation of 11%, a flexural modulus of 920.7 MPa, a stress at break in three-point bending of 7.36 and 5.72 MPa in four-point bending and a shear stress of 0.32 MPa. Although analytical calculation did not take the microstructure into account, the results were 4.9% lower than the experimental results, so Gibson's model provides a reliable approach. Following these results and their comparison with materials available on the market, papaya fiber plies have a place in sandwich materials as honeycomb cores.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"27 3","pages":"1495 - 1505"},"PeriodicalIF":2.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10163-025-02190-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Serhan Ilkentapar, Ezgi Örklemez, Ugur Durak, Sedat Gülçimen, Savaş Bayram, Niğmet Uzal, Burak Uzal, Okan Karahan, Cengiz Duran Atis
{"title":"Evaluation of diatomite substitute with thermal power plant waste fly ash in sustainable geopolymer through life cycle assessment","authors":"Serhan Ilkentapar, Ezgi Örklemez, Ugur Durak, Sedat Gülçimen, Savaş Bayram, Niğmet Uzal, Burak Uzal, Okan Karahan, Cengiz Duran Atis","doi":"10.1007/s10163-025-02184-w","DOIUrl":"10.1007/s10163-025-02184-w","url":null,"abstract":"<div><p>This research demonstrates the potential of diatomite as a fly ash replacement to improve mechanical properties and environmental sustainability and presents it as a viable alternative for sustainable construction. Additionally, a life cycle assessment (LCA) was conducted on the produced mortars to quantitatively compare their environmental impacts using a cradle-to-gate approach. In mixtures, it was used by replacing the diatomite in the ratios of 1%, 2%, 3%, 4%, and 5% by weight of the fly ash. Workability, unit weight, flexural and compressive strength, abrasion resistance, elevated temperature resistance and microstructure analysis were carried out. The results indicated that replacing 1%, 2%, and 3% diatomite increased the compressive and flexural strength of mortars due to their higher specific surface area. Two percent replacement of diatomite provided the best results. FESEM results of 3% diatomite inclusion showed more intense and compact microstructure of geopolymer. Diatomite inclusion increased the abrasion resistance of geopolymer. Since 2% diatomite replacement was found to be optimum, the LCA results showed that geopolymer mortar with 2% diatomite has 25% lower impacts in terms of global warming potential and 10% lower impacts in terms of terrestrial ecotoxicity than conventional Portland cement mortar.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"27 3","pages":"1418 - 1435"},"PeriodicalIF":2.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ateh Suh Nkwekeu Ndiforngu, Roberto Raga, Abdou Nasser Njoya Mfokou, Paula Ngo Fin Tan, Gergino Yemele Chounna
{"title":"Material recovery as a strategy for landfill remediation: a case study of Nkolfoulou landfill, Cameroon","authors":"Ateh Suh Nkwekeu Ndiforngu, Roberto Raga, Abdou Nasser Njoya Mfokou, Paula Ngo Fin Tan, Gergino Yemele Chounna","doi":"10.1007/s10163-025-02157-z","DOIUrl":"10.1007/s10163-025-02157-z","url":null,"abstract":"<div><p>This study sought to evaluate the potential advantages of recovering both fresh and old waste from the Nkolfoulou landfill as a remediation technique, a means of gaining airspace, and a means of retrieving material, thus increasing the flow of secondary resources in the local economy. The current treatment procedures were assessed. Waste sampling and characterization, largely based on an adapted version of the French standard for household waste characterization, was carried out for six districts of the capital of Cameroon (Yaounde1- Yaoundé 6) for fresh and old waste samples. The results revealed the low efficiency of the current waste management strategy and highlighted that fresh waste recovery would yield a potential of roughly 22% of recoverable material and a 29.2% gain in airspace per ha which is more significant than the current system. This would consequently prolong the lifespan of the landfill. In addition, landfill mining had a recovery potential of 19%, but to address the current state of the landfill and economy, pretreatment of waste by material recovery of fresh waste proved more feasible and beneficial. It would be advised as a primary barrier and preferred to landfill mining.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"27 3","pages":"1932 - 1943"},"PeriodicalIF":2.7,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10163-025-02157-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xuan Wu, Haipeng Yang, Lin Shen, Yue Jiang, Haobo Wang, Xueqin Li
{"title":"Effect of physical pretreatment of mixed food waste on protein hydrolysis and optimization of process conditions through response surface methodology","authors":"Xuan Wu, Haipeng Yang, Lin Shen, Yue Jiang, Haobo Wang, Xueqin Li","doi":"10.1007/s10163-025-02188-6","DOIUrl":"10.1007/s10163-025-02188-6","url":null,"abstract":"<div><p>Physical pretreatment methods can improve the protein hydrolysis of food waste. This paper investigates the effects of three physical pretreatment methods of mixed food waste on the variance of soluble protein concentration. A higher thermal pretreatment temperature (95 ℃) can shorten the protein hydrolysis time to 12 h. A longer microwave pretreatment time (90 s) can shorten the protein hydrolysis time by 50%. Compared with these pretreatment methods, ultrasonic pretreatment (20 min) is more effective because the protein hydrolysis time is further shortened by 36 h and the protein hydrolysis rate is higher (ultrasonic: 82.4%, microwave: 77.8%, thermal: 78.8%). This paper also studies the effects of three ultrasonic factors by using the response surface methodology (RSM). The protein hydrolysis rate is 86.96% under optimal ultrasonic conditions: an acoustic energy density of 102 W/L, an ultrasonic time of 23 min, and an initial ultrasonic temperature of 33 ℃. The <i>R</i><sup>2</sup> value and predicted <i>R</i><sup>2</sup> of the RSM model are 0.9925 and 0.9162, respectively. The relative error between the actual value and the predicted value obtained from the RSM model is 1.24%. That means the protein hydrolysis rate of mixed food waste can be predicted by the proposed RSM model.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"27 3","pages":"1369 - 1378"},"PeriodicalIF":2.7,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Splitting tensile strength behavior of dredged sediment with cement stabilization and straw fiber reinforcement","authors":"Dong-Yu Luo, Lei Lang, Bo Zhang","doi":"10.1007/s10163-025-02177-9","DOIUrl":"10.1007/s10163-025-02177-9","url":null,"abstract":"<div><p>This study investigated the splitting tensile strength behaviors of dredged sediment (DS) with Portland cement (PC) stabilization and straw fiber (SF) reinforcement. A series of splitting tensile strength (STS) tests were conducted to explore the STS and associated tensile stress–strain evolutions of PC-stabilized and SF-reinforced DS (CSFDS) under influences of PC content, SF content, SF length, and water content. In addition, the coupling action between PC stabilization and SF reinforcement inside CSFDS was clarified. The results show that incorporating SF weakened the STS of cement-stabilized DS (CDS), and the optimum SF content and length were, respectively, determined to be 0.4% and 2–5 mm. Incorporating suitable amount of SF could obviously alleviate the brittleness characteristics of CDS, and CSFDS exhibited strain-hardening characteristics under SF content of 0.2–0.6%. The effective empirical STS prediction model of CSFDS that comprehensively considers the influence of multiple factors was established. The “bridge effect” of SF inside CSFDS was beneficial for the ductility improvement, while the porous properties of SF and the wetting and erosion effects may be the intrinsic cause of strength decline of CDS with incorporating SF. The key findings can advance the recycling of CSFDS in geotechnical engineering applications and the collaborative resources utilization of DS and SF.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"27 3","pages":"1379 - 1393"},"PeriodicalIF":2.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Bio-hydrogen production from various waste resources through circular economy: current technologies and future perspective","authors":"Partha Kundu, Sindhu Vinodhan Vineetha, Adithya Mohan, Athira Ravikumar","doi":"10.1007/s10163-025-02183-x","DOIUrl":"10.1007/s10163-025-02183-x","url":null,"abstract":"<div><p>In the present global scenario, the imperative need for decarbonisation is rapidly driving the push towards the technologies for production of bio-hydrogen as a promising biofuel for the future. The escalating pace of industrial development and urban expansion has led to significant environmental degradation and intensifying the focus on bio-hydrogen. Consequently, research endeavours are directed towards its production using diverse renewable and sustainable resources. Over the past decades, numerous process and technologies have evolved for advance in bio-hydrogen production across various dimensions. To further enhancing the productivity of existing technologies, there is a need of growing emphasis on processes, that are not only more efficient but also commercially and economically viable, with a particular focus on resources like solid biomass and liquid waste over other renewable sources. The present study discussed in details about various process which includes thermochemical, biological, and electrochemical conversions, coupled with modified pre-treatment methods employing suitable conditions and parameters, which are emerging as more efficient, cost-effective means to enhance the yield of bio-hydrogen production as compared to conventional technologies. The present study specifically delved into a critical analysis of diverse technologies/processes developed over the years, particularly in the context of sustainable utilization of waste resources to circular economy through the generation of hydrogen.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"27 3","pages":"1263 - 1282"},"PeriodicalIF":2.7,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Elution suppression effect of radioactive cesium from municipal solid waste incineration fly ash using 10-[(tert-butyldiphenylsilyl)oxy]-decanoic acid","authors":"Taiga Kaseda, Narihito Ogawa, Yuya Koike","doi":"10.1007/s10163-025-02170-2","DOIUrl":"10.1007/s10163-025-02170-2","url":null,"abstract":"<div><p>We studied the suppression of radioactive Cs elution from municipal solid waste incineration (MSWI) fly ash using 10-[(<i>tert</i>-butyldiphenylsilyl)oxy]-decanoic acid. The synthesized decanoic acid derivative coated on MSWI fly ash containing less than 8000 Bq kg<sup>−1</sup> of radioactive Cs, and the amount of radioactive Cs eluted into pure water was measured by the Japanese Leaching Test No. 13. The elution rate of <sup>137</sup>Cs from raw fly ash was normalized to 100%, and the relative elution rate of <sup>137</sup>Cs using 10-[(<i>tert</i>-butyldiphenylsilyl)oxy]-decanoic acid was 25.3%. The synthesized carboxylic acid showed a high elution suppression effect on <sup>137</sup>Cs in MSWI fly ash. SEM revealed that the water repellent layer was maintained on the MSWI fly ash treated with carboxylic acid synthesized around JLT-13. In addition, the contact angle measurement showed that the surface of the MSWI fly ash treated with the synthesized carboxylic acid for water repellency was hydrophobic. These results indicate that the surface of the MSWI fly ash was changed by applying a water repellent treatment with the synthesized carboxylic acid. </p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"27 3","pages":"1316 - 1323"},"PeriodicalIF":2.7,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10163-025-02170-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A renewable porous ceramic developed by rice husk and granite cutting sludge","authors":"Ying-Chieh Lee, Annisa Oktafianti Nurlatifah, Huei-Jyun Shih, Endrika Widyastuti","doi":"10.1007/s10163-025-02181-z","DOIUrl":"10.1007/s10163-025-02181-z","url":null,"abstract":"<div><p>This study addresses the issues related to the consumption of granite cutting sludge and rice husk. The rice husks were sourced from the rice farming, while the granite powders were derived from granite cutting sludge. The granite powders were densified through sintering at high temperature. The effects of rice husk content and sintering temperature on the microstructures, absorption capacities and mechanical properties of porous ceramics were investigated. It is found that the granite powders mixed with 10% rice husk and sintered at 1060 °C exhibit excellent performance, including a water absorption capacity of 26% and a compressive strength of 40 MPa. These results are comparable to commercial porous ceramics but lower sintering temperature. Consequently, this porous ceramic significantly enhances grass growth. Therefore, the porous ceramic demonstrates its potential as a new water absorption material, effectively addressing the waste issues of granite cutting sludge and rice husk in Taiwan.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"27 3","pages":"1394 - 1405"},"PeriodicalIF":2.7,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Simultaneous waste valorization of sewage sludge and waste glass as raw materials for eco-friendly floor tile fabrication through sintering treatment with alkali agent addition","authors":"Yan Jhang Chen, Li Pang Wang","doi":"10.1007/s10163-025-02175-x","DOIUrl":"10.1007/s10163-025-02175-x","url":null,"abstract":"<div><p>In this study, an alternative approach for the simultaneous waste valorization of sewage sludge (SS) and waste glass (WG) was proposed through eco-friendly floor tile (FT) fabrication with alkali agent addition in sintering treatment. The effects of SS:WG mixing ratio, alkali agent concertation, sintering temperature, and sintering duration on the physical properties of the fabricated FT, including bending strength, bulk density, water absorption, and porosity were investigated. The results indicated that under the optimal conditions of an SS:WG mixing ratio of 1:3, a solid–liquid ratio of 2 g/g, a sintering temperature of 750 °C, and a sintering duration of 60 min, the fabricated FT had a bending strength of 22.5 MPa, a bulk density of 1.31 g/cm<sup>3</sup>, a water absorption of 17.8%, and a porosity of 18.3%, meeting the CNS-9737 and ISO 13006:2018 for external and internal uses. The carbon dioxide (CO<sub>2</sub>) emission of the proposed approach was reduced by more than 50% compared to traditional methods. The results demonstrated that the simultaneous waste valorization of SS and WG could be achieved for resources sustainable utilization. In addition, the eco-friendly fabrication of FT could also be achieved through reducing the required sintering temperature.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"27 2","pages":"1228 - 1244"},"PeriodicalIF":2.7,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143564326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}