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https://www.readbyqxmd.com/read/28415499/antibacterial-effect-of-peo-coating-with-silver-on-aa7075
#1
P Cerchier, L Pezzato, K Brunelli, P Dolcet, A Bartolozzi, R Bertani, M Dabalà
In this work, plasma electrolytic oxidation (PEO) coatings were produced on AA7075 using alkaline solution containing silicates compounds and silver micrometric particles in order to give to the coating an antimicrobial effect. In the optic of circular economy, silver chloride derived from the acid pre-treatment of electronic scraps was used as raw material and successively silver powders were synthesized from silver chloride solution using glucose syrup as reducing agent. The coatings were characterized by scanning electron microscope (SEM), X-ray diffraction analysis (XRD), X-ray photoelectron spectroscopy (XPS), potentiodynamic polarization test and antimicrobial tests...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28412853/nitrogen-behaviour-during-thermal-drying-of-mechanically-dewatered-biosludge-from-pulp-and-paper-industry
#2
Kati Mustonen, Ivan Deviatkin, Jouni Havukainen, Mika Horttanainen
An ongoing call to implement a circular economy is underway in the European Union, and a specific attention has been placed on the forest industry, which seeks additional recycling routes for its side streams, including biosludge. Biosludge is often dried and incinerated, thus wasting the nitrogen contained therein. This paper describes a study in which the release of nitrogen during thermal drying; the impact of the drying temperatures of 130, 180, and 210°C on the mass of ammonia released; and the potential for recovery of nitrogen from biosludge were examined...
April 17, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28411529/free-ammonia-pre-treatment-of-secondary-sludge-significantly-increases-anaerobic-methane-production
#3
Wei Wei, Xu Zhou, Dongbo Wang, Jing Sun, Qilin Wang
Energy recovery in the form of methane from sludge/wastewater is restricted by the poor and slow biodegradability of secondary sludge. An innovative pre-treatment technology using free ammonia (FA, i.e. NH3) was proposed in this study to increase anaerobic methane production. The solubilisation of secondary sludge was significantly increased after FA pre-treatment at up to 680 mg NH3-N/L for 1 day, under which the solubilisation (i.e. 0.4 mg SCOD/mg VS; SCOD: soluble chemical oxygen demand; VS: volatile solids) was >10 times higher than that without FA pre-treatment (i...
April 7, 2017: Water Research
https://www.readbyqxmd.com/read/28404509/recycled-tetrahedron-like-cucl-from-waste-cu-scraps-for-lithium-ion-battery-anode
#4
Hongying Hou, Yuan Yao, Song Liu, Jixiang Duan, Qishu Liao, Chengyi Yu, Dongdong Li, Zhipeng Dai
The wide applications of metal Cu inevitably resulted in a large quantity of waste Cu materials. In order to recover the useful Cu under the mild conditions and reduce the environmental emission, waste Cu scraps were recycled in the form of CuCl powders with high economic value added (EVA) via the facile hydrothermal route. The recycled CuCl powders were characterized in terms of scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD). The results suggested that the recycled CuCl powders consisted of many regular tetrahedron-like micro-particles...
April 9, 2017: Waste Management
https://www.readbyqxmd.com/read/28401315/improving-the-tool-box-for-robust-industrial-enzymes
#5
REVIEW
J A Littlechild
The speed of sequencing of microbial genomes and metagenomes is providing an ever increasing resource for the identification of new robust biocatalysts with industrial applications for many different aspects of industrial biotechnology. Using 'natures catalysts' provides a sustainable approach to chemical synthesis of fine chemicals, general chemicals such as surfactants and new consumer-based materials such as biodegradable plastics. This provides a sustainable and 'green chemistry' route to chemical synthesis which generates no toxic waste and is environmentally friendly...
April 11, 2017: Journal of Industrial Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28393682/new-feed-ingredients-the-insect-opportunity
#6
L W D van Raamsdonk, H J van der Fels-Klerx, J de Jong
In the framework of sustainability and a circular economy, new ingredients for feed are desired and, to this end, initiatives for implementing such novel ingredients have been started. The initiatives include a range of different sources, of which insects are of particular interest. Within the European Union, generally, a new feed ingredient should comply with legal constraints in terms of 'yes, provided that' its safety commits to a range of legal limits for heavy metals, mycotoxins, pesticides, contaminants, pathogens etc...
April 10, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28386158/valorisation-to-biogas-of-macroalgal-waste-streams-a-circular-approach-to-bioproducts-and-bioenergy-in-ireland
#7
Silvia Tedesco, Joseph Stokes
Seaweeds (macroalgae) have been recently attracting more and more interest as a third generation feedstock for bioenergy and biofuels. However, several barriers impede the deployment of competitive seaweed-based energy. The high cost associated to seaweed farming and harvesting, as well as their seasonal availability and biochemical composition currently make macroalgae exploitation too expensive for energy production only. Recent studies have indicated a possible solution to aforementioned challenges may lay in seaweed integrated biorefinery, in which a bioenergy and/or biofuel production step ends an extractions cascade of high-value bioproducts...
2017: Chemické Zvesti
https://www.readbyqxmd.com/read/28367754/waste-pickers-in-global-south-informal-recycling-sector-in-a-circular-economy-era
#8
Costas Velis
No abstract text is available yet for this article.
April 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28335689/trends-of-occupational-hygiene-in-finland
#9
Rauno Pääkkönen, Milja Koponen
The aim of this work is to evaluate and describe the current status of, and prospects for, the future of occupational hygiene in Finland. The main sources of information include a seminar held in the annual meeting of Finnish Occupational Hygiene Society, and interviews with different stakeholders. Nanotechnology and other new materials, changing work environments, circular economy including green jobs, new medical methods, and advances of construction methods were recognised as future challenges. Future work opportunities for occupational hygiene experts included exposure assessments in indoor air surveys, private consulting and entrepreneurship in general, international activities, and product safety issues...
March 24, 2017: International Journal of Occupational Safety and Ergonomics: JOSE
https://www.readbyqxmd.com/read/28314153/sewage-sludge-disposal-strategies-for-sustainable-development
#10
Małgorzata Kacprzak, Ewa Neczaj, Krzysztof Fijałkowski, Anna Grobelak, Anna Grosser, Małgorzata Worwag, Agnieszka Rorat, Helge Brattebo, Åsgeir Almås, Bal Ram Singh
The main objective of the present review is to compare the existing sewage sludge management solutions in terms of their environmental sustainability. The most commonly used strategies, that include treatment and disposal has been favored within the present state-of-art, considering existing legislation (at European and national level), characterization, ecotoxicology, waste management and actual routs used currently in particular European countries. Selected decision making tools, namely End-of-waste criteria and Life Cycle Assessment has been proposed in order to appropriately assess the possible environmental, economic and technical evaluation of different systems...
March 14, 2017: Environmental Research
https://www.readbyqxmd.com/read/28273595/environmental-assessment-of-the-entire-pork-value-chain-in-catalonia-a-strategy-to-work-towards-circular-economy
#11
Isabel Noya, Xavier Aldea, Sara González-García, Carles M Gasol, María Teresa Moreira, Maria José Amores, Desirée Marín, Jesús Boschmonart-Rives
Pork industry in Catalonia plays a foremost and representative role in the Spanish pork sector. Beyond the economic benefits, conventional practices in the pork industry also imply a number of environmental impacts that need to be dealt with. In this context, the environmental performance of traditional linear pork chain in Catalonia was evaluated through a LCA approach. The outcomes of the analysis showed that both fodder production and transport activities were identified as the critical stages of the system...
March 4, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28257181/novel-indicators-for-the-quantification-of-resilience-in-critical-material-supply-chains-with-a-2010-rare-earth-crisis-case-study
#12
Benjamin Sprecher, Ichiro Daigo, Wouter Spekkink, Matthijs Vos, René Kleijn, Shinsuke Murakami, Gert Jan Kramer
We introduce several new resilience metrics for quantifying the resilience of critical material supply chains to disruptions and validate these metrics using the 2010 rare earth element (REE) crisis as a case study. Our method is a novel application of Event Sequence Analysis, supplemented with interviews of actors across the entire supply chain. We discuss resilience mechanisms in quantitative terms-time lags, response speeds, and maximum magnitudes-and in light of cultural differences between Japanese and European corporate practice...
March 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28161336/dynamic-visualisation-of-municipal-waste-management-performance-in-the-eu-using-ternary-diagram-method
#13
R Pomberger, R Sarc, K E Lorber
This contribution describes the dynamic visualisation of European (EU 28) municipal waste management performance, using the Ternary Diagram Method. Municipal waste management performance depends primarily on three treatment categories: recycling & composting, incineration and landfilling. The framework of current municipal waste management including recycling targets, etc. is given by the Waste Framework Directive - 2008/98/EC. The proposed Circular Economy Package should stimulate Europe's transition towards more sustainable resources and energy oriented waste management...
February 1, 2017: Waste Management
https://www.readbyqxmd.com/read/28155071/sequential-application-of-waste-whey-as-a-medium-component-for-kluyveromyces-lactis-cultivation-and-a-co-feeder-for-lipase-immobilization-by-clea-method
#14
Aušra Veteikytė, Rimantas Šiekštelė, Bronius Tvaska, Inga Matijošytė
Currently, much attention is paid to technologies which can be drivers of the circular economy across different sectors, in particular, to develop technologies for utilization or reusability of biocompatible materials from industrial waste. One of such is the milk whey, which is a cheap biobased raw material, the disposal of which is a major problem for the dairy industry. Our proposed and investigated technology is based on a continuous exploitation of the whey combining microbiology and biotechnology. Primarily, whey was used as a nutrition source for the cultivation of Kluyveromyces lactis with the aim to produce the targeted biocatalyst-lipase...
February 2, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28145685/from-the-ontonagon-boulder-to-the-circular-economy
#15
David Sedlak
No abstract text is available yet for this article.
February 1, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28097922/cascade-use-indicators-for-selected-biopolymers-are-we-aiming-for-the-right-solutions-in-the-design-for-recycling-of-bio-based-polymers
#16
Jakob Hildebrandt, Alberto Bezama, Daniela Thrän
When surveying the trends and criteria for the design for recycling (DfR) of bio-based polymers, priorities appear to lie in energy recovery at the end of the product life of durable products, such as bio-based thermosets. Non-durable products made of thermoplastic polymers exhibit good properties for material recycling. The latter commonly enjoy growing material recycling quotas in countries that enforce a landfill ban. Quantitative and qualitative indicators are needed for characterizing progress in the development towards more recycling friendly bio-based polymers...
April 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28094158/the-mass-flow-and-proposed-management-of-bisphenol-a-in-selected-norwegian-waste-streams
#17
Hans Peter H Arp, Nicolas A O Morin, Sarah E Hale, Gudny Okkenhaug, Knut Breivik, Magnus Sparrevik
Current initiatives for waste-handling in a circular economy favor prevention and recycling over incineration or landfilling. However, the impact of such a transition on environmental emissions of contaminants like bisphenol A (BPA) during waste-handling is not fully understood. To address this, a material flow analysis (MFA) was constructed for selected waste categories in Norway, for which the amount recycled is expected to increase in the future; glass, vehicle, electronic, plastic and combustible waste...
January 13, 2017: Waste Management
https://www.readbyqxmd.com/read/28094157/stabilization-of-tannery-sludge-by-co-treatment-with-aluminum-anodizing-sludge-and-phytotoxicity-of-end-products
#18
E Pantazopoulou, O Zebiliadou, M Mitrakas, A Zouboulis
A global demand for efficient re-utilization of produced solid wastes, which is based on the principles of re-use and recycling, results to a circular economy, where one industry's waste becomes another's raw material and it can be used in a more efficient and sustainable way. In this study, the influence of a by-product addition, such as aluminum anodizing sludge, on tannery waste (air-dried sludge) stabilization was examined. The chemical characterization of tannery waste leachate, using the EN 12457-2 standard leaching test, reveals that tannery waste cannot be accepted even in landfills for hazardous wastes, according to the EU Decision 2003/33/EC...
January 13, 2017: Waste Management
https://www.readbyqxmd.com/read/28093953/case-study-is-the-catch-all-plastics-bin-useful-in-unlocking-the-hidden-resource-potential-in-the-residual-waste-collection-system
#19
Lukas Kranzinger, Kerstin Schopf, Roland Pomberger, Elisabeth Punesch
Austria's performance in the collection of separated waste is adequate. However, the residual waste still contains substantial amounts of recyclable materials - for example, plastics, paper and board, glass and composite packaging. Plastics (lightweight packaging and similar non-packaging materials) are detected at an average mass content of 13% in residual waste. Despite this huge potential, only 3% of the total amount of residual waste (1,687,000 t y(-1)) is recycled. This implies that most of the recyclable materials contained in the residual waste are destined for thermal recovery and are lost for recycling...
January 1, 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28060850/a-framework-to-evaluate-the-impact-of-armourstones-on-the-chemical-quality-of-surface-water
#20
Lars Duester, Dierk-Steffen Wahrendorf, Corinna Brinkmann, Anne-Lena Fabricius, Björn Meermann, Juergen Pelzer, Dennis Ecker, Monika Renner, Harald Schmid, Thomas A Ternes, Peter Heininger
Today, basic requirements for construction works include the protection of human health and of the environment. In the tension area between economic demands, circular flow economy and environmental safety, a link between the results from standardized leaching tests and the respective environmental quality standards must be created. To derive maximum release limits of metals and metalloids for armourstones in hydraulic engineering, this link is accomplished via a simple model approach. By treating natural materials and industrial by-products the same way, the article delivers an overview on the recent regulative situation in Europe as well as describes and discusses an innovative approach to derive maximum release limits for monolithic construction products in hydraulic engineering on a conceptual level...
2017: PloS One
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