Search results for "Recycling"
showing 10 items of 207 documents
Efficiency of Daphnia magna in removal of green microalgae cultivated in Nordic recirculating aquaculture system wastewater
2020
The increase of global aquaculture production has boosted the development of recirculating aquaculture systems not only because they reduce water use but also provide opportunities for waste management and the use of released nutrients. The dissolved nutrients can be efficiently removed from recirculating aquaculture system wastewater by microalgae, and microalgae can be harvested from the wastewater with low costs by zooplankton such as Daphnia. The purpose of this study was to evaluate the feasibility of using microalgae and Daphnia for bioremediation of recirculating aquaculture system wastewater in Nordic conditions. We evaluated the growth and filtration efficiency of the waterflea Dap…
Recykling odpadów z szyb samochodowych i szkła budowalnego z folią PVB
2016
Dokonano analizy możliwości wykorzystania odpadów z szyb samochodowych klejonych oraz bezpiecznego szkła budowlanego z folią PVB. Aktualnie najczęściej stosowaną folią w szkle klejonym jest folia poliwinylobutyralu (PVB). Niniejsza praca przedstawia analizę możliwości odzyskania surowców w postaci folii PVB i szkła z odpadów szyb klejonych. Analizowana metoda polega na rozpuszczeniu folii PVB oraz separacji folii od kawałków szkła. Przedstawiono również możliwości zastosowania rozpuszczonej folii PVB, a szkła jako wsadu surowcowego w hutach szkła.
Plastmasas atkritumu pārstrāde Latvijā
2022
Bakalaura darbā “Plastmasas atkritumu pārstrāde Latvijā” tika veikts pētījums, par esošajiem uzņēmumiem Latvijā, kas nodarbojas ar plastmasas atkritumu pārstrādi. Konkrēti tika apskatīti četri uzņēmumi AS “PET Baltija”, SIA “Nordic Plast”, SIA “Grindplast”, SIA "Why Recycle". Uz doto mirkli šie četri uzņēmumi ir lielākie uzņēmumu Latvijā, kas nodarbojas ar plastmasas atkritumu pārstrādi. Tomēr uzņēmumi spēj pārstrādāt tikai četru veidu plastmasu PET, LDPE, HDPE un PP (kas ir tieši plēves). Darbā tika apskatīts, kāda veida plastmasas produktus uzņēmumi saražo. Apskatīta sīkāka informācija par uzņēmumu finansiālo stāvokli pēdējos gados, tādā veidā meklējot skaidrojumu vai uzņēmumi ir spējīgi …
On the effectiveness of different additives and concentrations on the re-building of the molecular structure of degraded polyethylene
2006
Mechanical recycling is an easy and economic way to re-use plastic waste as secondary materials, but, in general, their properties are worse with respect to the reclaimed materials and the virgin polymer. The aim of this work was to study the effect of concentration and reaction kinetics of two additives, an ethylene-co-glycidyl methacrylate (Lotader) and a hydroxylamine derivative (CGX), in the re-building of a degraded polyethylene. CGX is a nitroxyl radical generator able to form branching in polyolefins while the epoxy groups of Lotader can react with the functional groups present in the recycled polyethylene. The results indicate that the CGX has a higher reaction rate than Lotader, pr…
Recycling of Thermoset Materials and Thermoset-Based Composites: Challenge and Opportunity
2022
Thermoset materials and their composites are characterized by a long life cycle with their main applications in aircrafts, wind turbines and constructions as insulating materials. Considering the importance of recovery and valorization of these materials at their end-of-life, avoiding landfilling, the interest concerning their recycling grows continuously. The thermoset materials and their composites, to be successfully recovered and valorized, must degrade their three-dimensional structures and recover the mono-oligomers and/or fillers. The thermoset materials could successfully degrade through thermal treatment at different temperatures (for example, above 1000 °C for incineration, ca. 50…
Strawberry fields forever: that is, how many grams of plastics are used to grow a strawberry?
2019
In the agricultural sector, plastic is one of the most important tools for improving the managerial and economic performance of companies. The horticultural production under protected cultivation, in particular, makes abundant use of plastic polymers. Polymers that mostly turn into waste. This study aims to identify the main characteristics and factors affecting the decision of farmers operating in the strawberry production sector to recycle the plastic material used on-farm and quantify the plastic used in relation to the different types of materials used. Data come from one of the Italian most specialized areas in the strawberry sector, Marsala. Main findings show that behind a typical 25…
About_Change
2022
Il contributo raccoglie i rapporti epilogativi (Research Report) di una specifica ricerca condotta sulla tecnologia come scienza applicata al patrimonio dell’esistente oltre le good practices, al di fuori di nicchie elitarie poco rappresentative della comune produzione edilizia. Queste, ora, hanno bisogno di un approccio tecnologicamente flessibile, innestato sul consenso e sulla partecipazione evolutiva del già fatto e dal potersi ancora fare (Germanà, 2008). Ci riferiamo alla tecnologia edilizia come scienza del costruire capace di innescare nuovi percorsi del fare inerenti ai processi di trasformazione, completamento e rigenerazione dell’esistente; da ricerche ‘sensibili’ a nuove qualità…
On the degree of binder activity of reclaimed asphalt and degree of blending with recycling agents
2020
It is common practice to assume full blending of the aged binder of reclaimed asphalt (RA) within the design of new asphalt mixtures. Although being practical, this assumption has often led designers to asphalt mixtures lacking binder. Hence, going towards recycled asphalt mixtures (RAM) there is a need to have a better understanding of the blending phenomena, to have a general agreement on terminology and finally adapting RA classification and mix design procedures accordingly. This manuscript aims at being both a reference and stimulus for the scientific community to work in this direction and on this basis provides a nomenclature and a theoretical framework of the blending phenomena. The…
Effects of Chinese youth consumer recycling behavior decisions : application of TPB theory to beverage container recycling system adoption
2016
Increasing municipal waste is a challenge that China is facing during decades, especially along with the economic growth. Although recycling is apparently an efficient method to deal with the problem, 2% of solid waste recycled in China revealed there is barrier in the path. The recycling system is developing in China by government and companies, hence understanding and predicting Chinese consumers’ acceptance of the system is necessary. This research is aim to understand the Chinese youth consumers’ recycling behavior through the view on beverage container recycling behavior. Hypothesizes in this study is proposed according to the theoretical framework of the TPB, which is attitude toward …
Re-Urban | De-frag. Progetti per trasformare la circonvallazione di Palermo
2014
This article presents a short survey of contemporary approaches to re-cycling, up-cycling and recovering urban freeways. Further, it introduces the assumptions and some initial descriptions of cases study of the Degree studio "In-FRA. Architettura e infrastruttura nella città contemporanea", that Z. Tesoriere conducts since 2013 at the University of Palermo. The studio focuses on how enhancing architectural conditions of urban freeways in contemporary urban realm, with particular attention to the circonvallazione of Palermo.