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Visar resultat 1 - 5 av 81 uppsatser som matchar ovanstående sökkriterier.

  1. 1. Automation of a rotating bed reactor for PFAS remediation

    Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för fysik

    Författare :Axel Martin; [2023]
    Nyckelord :Programming; automation; experimentation; optimization;

    Sammanfattning : Properties such as being water and oil repellent and being heat resistant make per- and polyflouroalkyl substances (PFAS) useful in a wide range of products. Since they do not break down in the environment, PFAS pollution makes it way back into drinking water and seafood. LÄS MER

  3. 2. Analysis of Methanol Based Chlorine Dioxide Production : An analysis of sodium chlorate reduction efficiency and investigation of salt cake filter wash on an SVP-LITE® system

    Kandidat-uppsats, Karlstads universitet

    Författare :Emil Lundh; [2023]
    Nyckelord :ECF; SVP-LITE®; chlorine dioxide; bleaching; ECF; SVP-LITE®; Klordioxid; blekning;

    Sammanfattning : This work aimed to determine how effective an SVP-LITE® chlorine dioxide plant at Vallviks Bruk was running. This was done by determining the chemical consumption per unit of chlorine dioxide produced. The calculations relied upon online instrumentation that was manually validated. LÄS MER

  4. 3. Driftoptimering av luftningssystem och närsaltsdosering i ett skogsindustriellt reningsverk : Utvärdering av en biologisk reningsprocess ur ett energi-, miljö- och kostnadsperspektiv

    Master-uppsats, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Författare :Selma Zetterlund; Olivia Schwartz; [2023]
    Nyckelord :Simulink; reningsteknik; luftning; närsaltsdosering; reglerteknik;

    Sammanfattning : Dagens samhälle står inför många utmaningar där energieffektivisering är en stor del för att nå Sveriges energipolitiska mål. Det finns anledning att effektivisera och optimera energianvändningen i Sveriges papper- och massaindustrier då de står för en stor andel av nationell energiförbrukning. LÄS MER

  5. 4. Experimental Study of Flow Fields in Moving Bed Biofilm Reactors

    Master-uppsats, KTH/Hållbar utveckling, miljövetenskap och teknik

    Författare :Shea Nee Chew; [2023]
    Nyckelord :Moving bed biofilm reactors; Biofilm carriers; Mechanical mixing; Mixer configurations; Carrier mixing; Biofilmsreaktorer med rörlig bädd; Biofilmsbärare; Mekanisk blandning; Blandarkonfigurationer; Bärarblandning;

    Sammanfattning : With the rise in global energy prices, as well as energy consumption being the largest source of greenhouse gas emissions, biofilm-based systems utilized for wastewater treatment, such as moving bed biofilm reactors (MBBRs), have grown in popularity for their lower energy consumption compared to conventional activated sludge processes. However, this technology requires large amounts of energy to constantly distribute and suspend its biofilm carrier within the reactor by either aerators or mechanical mixers. LÄS MER

  7. 5. Electrosynthesis of persulfate and hydrogen gas with boron doped diamond as the anode material

    Kandidat-uppsats, KTH/Kemiteknik

    Författare :Sandra Shneker; Tsion Abebaw Kebede; Vera Lindbäck; [2022]
    Nyckelord :Boron-doped diamond; persulfate; flow cell; electrosynthesis; current efficiency;

    Sammanfattning : The efficiency of boron-doped diamond electrodes (BDD) has been investigated by electrolysis of an aqueous solution containing sodium sulfate. A Synthesis StarterKit from Condias was used, which contained the BDD anode with an active surface area of 3.14 cm2, and electrosynthesis was performed in a batch mode reactor. LÄS MER