Viimeksi syötetyt Tieteelliset julkaisut
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Effect of Precipitation Temperature on the Properties of Cellulose Ultrafiltration Membranes Prepared via Immersion Precipitation with Ionic Liquid as Solvent
(MDPI, 25.09.2018)Supported cellulose ultrafiltration membranes are cast from a cellulose-ionic liquid solution by the immersion precipitation technique. The effects of coagulation bath temperature and polymer concentration in the casting ... -
Carbon handprint – An approach to assess the positive climate impacts of products demonstrated via renewable diesel case
(Elsevier, 28.09.2018)The capacity to calculate and communicate the beneficial environmental impact of products and services is lacking in scientific guidelines. To fill this gap, this article presents a new approach for calculating the carbon ... -
Alcohol promoted methanol synthesis enhanced by adsorption of water and dual catalysts
(Elsevier, 03 / 2018)Alcohol-promoted methanol synthesis uses heterogeneous methanol synthesis catalysts in alcoholic solvents where the alcohols act as a co-catalyst. In the presence of alcohol, the reaction proceeds through alcohol formate ... -
Effect of mixing on enzymatic hydrolysis of cardboard waste: Saccharification yield and subsequent separation of the solid residue using a pressure filter
(Elsevier, 04 / 2012)Cellulosic wastes, from sources such as low-quality cardboard and paper, are regarded as potential feedstocks for bioethanol production. One pathway from these cellulosic materials to ethanol is saccharification (hydrolysis) ... -
Removal of chloride from fly ash produced in hazardous waste incineration by leaching and displacement washing in a vertical filter press
(SAGE Publishing, 11.01.2013)Fly ash is generated in large quantities by waste incineration processes. Chloride is commonly present in the fly ash produced by the incineration of hazardous materials, such as polyvinylchloride plastic. Major difficulties ... -
Steam dewatering of filter cakes in a vertical filter press
(Taylor & Francis, 27.06.2013)Steam dewatering of filter cakes is recognized as a competitive alternative to conventional air drying and thermally assisted mechanical dewatering (TAMD). The main benefit of cake dewatering with high-pressure steam is ... -
Experimental Study on the Influence of Selected Process Variables on the Separation of a Fine Particle Suspension with a Pilot Scale Decanter Centrifuge
(Taylor & Francis, 18.06.2013)Decanter centrifuges are used widely in the chemical and process industries for dewatering and classification of solid-liquid suspensions. The most important applications of this class of centrifuges are found in wastewater ... -
Use of filter aids to improve the filterability of enzymatically hydrolyzed biomass suspensions
(American Chemical Society, 26.09.2013)Filter aids are used in challenging filtration applications, such as the deliquoring of biomass suspensions and separation of fine particles from liquids. Organic filter aids, typically composed of cellulose, may be the ... -
Influence of enzyme loading on enzymatic hydrolysis of cardboard waste and size distribution of the resulting fiber residue
(Elsevier, 05 / 2014)Enzymatic hydrolysis of lignocellulosic biomass to sugars alters the properties of the cellulosic fibers. Several process variables, including enzyme loading, play an important role in these changes. Many physical properties ... -
Enzymatically hydrolyzed and agitated biomass suspensions: experimental determination of fiber size distributions and filtration characteristics
(Editura Academiei Romane, 2014)Separation processes in general present a significant challenge in the production of bioethanol from lignocellulosic materials. Solid-liquid separation,prior to the concentration of ethanol (for instance, by distillation),is ... -
Wet grinding of CaCO3 with a stirred media mill: Influence of obtained particle size distributions on pressure filtration properties
(Elsevier, 03 / 2015)Chemical and process industries utilize stirred media mills for efficient fine grinding of solids. Stirred media mills, also referred to as stirred ball or stirred bead mills, generally have a good ability to produce fine ... -
Enabling safe dry cake disposal of bauxite residue by deliquoring and washing with a membrane filter press
(SAGE Publications, 16.02.2015)Dry cake disposal is the preferred technique for the disposal of bauxite residue, when considering environmental issues together with possible future utilisation of the solids. In order to perform dry cake disposal in an ... -
Dissolution of sodium, aluminum and caustic compounds from bauxite residues
(Elsevier, 08 / 2015)Bauxite residues consist of solid particles and a strongly alkaline liquid. Depending on the selected disposal method, the solids content of washed bauxite residues varies from 30 to 70 w-%. The objective of this study is ... -
Recovery of sodium from bauxite residue by pressure filtration and cake washing
(Elsevier, 10.08.2015)Bauxite residue, the main waste fraction of alumina production, is extremely hazardous to the environment, as well as to human health. After the recovery of the pregnant liquor, the washed and thickened bauxite residue is ... -
Prediction of pressure filtration characteristics of CaCO3 suspensions ground in a vertical stirred media mill
(Elsevier, 11 / 2015)Cake filtration is an important unit operation in the processing of minerals and pigments. The filtration characteristics are strongly dependent on the upstream processing of the ore, such as grinding parameters. This study ... -
Separation, treatment and utilization of inorganic residues of chemical pulp mills
(Elsevier, 01.10.2016)The major inorganic solid residues of chemical pulp mills include green liquor dregs, various lime residues, recovery boiler fly ash, and salt cake produced at the chlorine dioxide generator. Only a small proportion of ... -
Solid-liquid separation of hydrolysates obtained from enzymatic hydrolysis of cardboard waste
(Elsevier, 07 / 2012)Enzymatic hydrolysis provides an environmentally friendly pathway from cellulosic biomass to sugars that can be fermented to produce ethanol. The hydrolysis step has a marked influence on the overall efficiency of the ... -
Reduction of the width of particle size distribution to improve pressure filtration properties of slurries
(Elsevier, 03 / 2017)The filtration properties of mineral slurries depend for instance on the properties of the solid particles and on the way how these particles arrange themselves when the filter cake is formed. In cake filtration applications, ... -
Effective removal of hazardous trace metals from recovery boiler fly ashes
(Elsevier, 15.02.2018)The objective of this study is to introduce a treatment sequence enabling straightforward and effective recovery of hazardous trace elements from recovery boiler fly ash (RBFA) by a novel method, and to demonstrate the ... -
Local properties of filter cakes formed from pH-adjusted bauxite residue slurries
(Elsevier, 03.04.2018)Solid-liquid separation of bauxite residue is a topical issue in the alumina industry, not least due to the great quantity and problematic properties of this highly alkaline residue. The objective of this contribution is ...
