1,720,998 research outputs found
Influence of membrane flux, ultrasonic frequency and recycle ratio in the hybrid process USAMe
No full textThis paper focused on the combination of membrane ultrafiltration, adsorption and ultrasound processes in one hybrid process called USAMe for improving membrane wastewater treatment performance and membrane fouling control. Different tests were conducted at different ultrasound frequencies and recycle ratio. Improved permeate quality in the USAMe process. Membrane fouling reduction with the combined application of ultrasound and activated carbon. Influence of ultrasound frequency, membrane flux and recycle ratio on treatment performance
Water Energy Nexus: evalutation of the enviromental impact in the national and international scenarios
No full textCost effective removal of COD in the pre-treatment of wastewater from paper industry
No full textDifferent pre-treatment processes were applied to investigate the removal of chemical oxygen demand (COD) from paper mill effluent. The objective of this paper is to find the optimal operating conditions for coagulation process. The effect of key operational parameters, including the type of coagulant, initial pH, temperature, and coagulant dose, on the percent removal of COD was investigated. Under the optimal operational conditions, the treatment of wastewater from paper industries by coagulation has led to a reduction of fee paid for wastewater discharged
Degradation of Gaseous VOCs by Ultrasonication: Effect of Water Recirculation and Ozone Addition
No full textUltrasonication with water recirculation slightly enhanced the removal of toluene compared to water recirculation alone due to conjunction of pyrolysis and hydroxyl radical oxidation with absorption. On the other hand, the addition of ozone with ultrasonication decreased the removal efficiency due to scavenging of hydroxyl radicals. The reaction rate for ozone and OH radicals produced during the US process was faster compared to the rate for ozone and toluene
Hydrogen production in electro membrane bioreactors
No full textReduction of organic and nutrient compounds. Membrane fouling control through the decrease of membrane fouling precursors and quorum sensing. Energy production in terms of hydrogen
Self-forming dynamic membrane: a review
No full textThis paper presents self-forming dynamic membrane (SFDM) process as a promising alternative to membrane technology. A stable dynamic membrane (DM) is mainly composed of gel layer and cake layer which are responsible for filtration and biodegradation. An understanding of the formation mechanism and impact of operating conditions, support mesh, sludge properties and configuration on the formation, and characteristics of the dynamic membrane is essential to optimize the efficiency and reduce fouling propensity of this technology. The paper thus aims to promote its applicability on wastewater treatment. Review of the influence of mesh support properties, different operating conditions and sludge properties on SFDM performance, and cost comparison between MBR and SFDMBR technologies
Fuzzy-assisted ultrafiltration of wastewater from milk industries
No full textThe whey is a by-product rich in organic substances; the system, as conceived, is self-learning
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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