Search results for "Waste"

Discharge management in fresh and brackish water RAS: Combined phosphorus removal by organic flocculants and nitrogen removal in woodchip reactors

2020

The current study combined P and N removal using organic flocculant chemicals and woodchip bioreactors in both freshwater and brackish water (7 ppm) recirculating aquaculture systems (RAS). The use of carbon (C) containing flocculant chemicals in the process was hypothesized to further stimulate C-demanding N removal (denitrification) in bioreactors. The trial of combined P and N removal consisted of four treatments: freshwater and brackish water RAS with and without the addition of supernatant from flocculation process to the woodchip reactor. Duplicate woodchip reactors were used per treatment and the trial was run for six weeks. 56 % and 49 % of P was removed from fresh and brackish slud…

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…

Interlinkages between operational conditions and direct and indirect greenhouse gas emissions in a moving bed membrane biofilm reactor

2016

Nitrous oxide (N2O) can be emitted during wastewater treatment contributing to the global warming due to its high global warming potential,. During the last ten years, several efforts have been provided to improve knowledge on: key mechanisms, operating factors and influent features affecting the N2O production/emission. However, the knowledge on the investigated issues is not completely mature. Indeed, in terms of mathematical modelling, literature shows that a reliable model has not yet been established due to the huge data set required and the complexity of the mechanistic models indicated as the most accurate. In this work, the first attempt to perform a multiregression analysis is pres…

DEVELOPMENT OF A NEW SATURATED VAPOUR-ANODE, SATURATED VAPOUR-CATHODE AMTEC-LIKE DEVICE

Husk Energy Supply Systems for Sunflower Oil Mills

2020

Together with solar, wind, and hydro renewable energy sources (RES), biomass constitutes an integral part of the high-renewables electricity systems. Considerable feedstocks for electricity generation are process-based residues. Ukraine is the world leader in sunflower seed production, therefore, husk (a by-product of oil production) is a promising biofuel for combustion- based power plants. The plants consume primarily electricity and fossil fuels (natural gas or fuel oil) for steam production. Their usage affects the edible oil production cost and impacts on climate change. The above facts force us to look for alternatives. By-product (husk) utilization can reduce exhaustible energy consu…

Resistant ammonia-oxidizing archaea endure, but adapting ammonia-oxidizing bacteria thrive in boreal lake sediments receiving nutrient-rich effluents

2018

Climate change along with anthropogenic activities changes biogeochemical conditions in lake ecosystems, modifying the sediment microbial communities. Wastewater effluents introduce nutrients and organic material but also novel microbes to lake ecosystems, simulating forthcoming increases in catchment loadings. In this work, we first used 16s rRNA gene sequencing to study how the overall sediment microbial community responds to wastewater in six boreal lakes. To examine forthcoming changes in the lake biogeochemistry, we focused on the ammonia-oxidizing archaea (AOA) and bacteria (AOB), and examined their functional and compositional community response to wastewater. Although we found the l…

PRODUZIONE DI RIFIUTI A RISCHIO INFETTIVO E INDICI DI COMPLESSITÀ IN UN “CENTRO TRAPIANTI”

2015

Questo studio analizza la produzione di rifiuti a rischio infettivo in una grande struttura ospedaliera specializzata per le attività di trapianto: Ismett (Istituto Mediterraneo per i Trapianti e Terapie ad Alta Specializzazione), che si trova a Palermo. Sono state determinate le relazioni fra la quantità e la composizione dei rifiuti, da una parte; la complessità della struttura e la natura delle cure erogate, dall’altra. In letteratura si trovano regolarmente i risultati di ricerche sulla produzione di rifiuti a rischio infettivo nei più diversi Paesi del mondo; i dati pubblicati provengono quasi esclusivamente da Ospedali Generali, anche complessi e di Alta Specializzazione. Tali dati po…

Thermophilic anaerobic digestion of source separated institutional food waste and kitchen waste

2013

Two decades of discussion on charitable food aid in Finland : analysing the framing by and through the media

2016

Jo kaksi vuosikymmentä virallisen sosiaalipolitiikan rajapinnoilla toiminut ruoka-apu on murrosvaiheessa: Tulisiko toiminta hiljaisen hyväksynnän sijaan tunnustaa, jolloin avun kohdentamista ja järjestämistä voidaan avoimesti kehittää yhdessä kirkon, kunnallisen sosiaalitoimen ja yksityisen sektorin kesken? Onko toiminnan fokus siirtymässä väliaikaiseksi tarkoitetusta akuutin nälän torjunnasta kohti sosiaalipoliittisen ruoka- köyhyyden ja ekologisen ruokahävikin ongelmat yhdistävää ratkaisumallia? Julkisen, yksityisen ja kolmannen sektorin yhteistyönä toteutettavan saksalaisen ruoka-apumallin (Berliner Tafel -ruokapankkiverkosto) rantautuminen Suomeen (Yhteinen Pöytä …

From Scarcity to Abundance : Food Waste Themes and Virtues in Agrarian and Mature Consumer Society

2019

Uusitalo and Takala address the food waste problem as a societal phenomenon and examine ethical virtues, values linked to them and food practices in two different time periods: agrarian society (1885–1917) and mature consumer society (2008–2017), in Finland. They use data from newspapers to uncover how ethical principles can underpin understanding of the food waste phenomenon. The study shows how the virtues adopted by food chain actors guide their practices towards sustainable ways of handling excess food. While societal themes of food waste are changing, virtues and food practices are changing as well, but some deep-rooted societal virtues and values persist. The chapter concludes with re…