Sökning: "air treatment"

Visar resultat 21 - 25 av 278 uppsatser innehållade orden air treatment.

1. 21. The application of low-cost sensors in estimates of greenhouse gases : A field study at a wastewater treatment plant

   Kandidat-uppsats, Linköpings universitet/Filosofiska fakulteten; Linköpings universitet/Tema Miljöförändring

   Författare :Daniel Montecinos; Saga Magnusson; [2022]
   Nyckelord :Methane; Carbon dioxide; wastewater treatment; Low-cost sensor network; Measurement; Environmental monitoring;

   Sammanfattning : Anthropogenic activity has caused increased concentrations of greenhouse gases (GHGs) in the atmosphere which has resulted in global warming gaining momentum. GHG emission estimates up to date are insufficient and in order to mitigate GHG emissions of anthropogenic origin fluxes of GHGs need to be mapped. LÄS MER

3. 22. Biochar and hemp as peat substitutes in organic growing media : effects on nutrient availability and nutrient uptake

   Master-uppsats, SLU/Dept. of Biosystems and Technology (from 130101)

   Författare :Malin Nilsson; [2022]
   Nyckelord :Growing media; substrate; biochar; hemp; peat substitution; nutrient availability; nutrient use efficiency;

   Sammanfattning : This study aimed at evaluating the suitability of biochar and hemp as partial or complete replacement of peat in horticultural growing media, with specific emphasis on the effects on nutrient availability and plant nutrient uptake. The study was motivated by the environmental concerns surrounding the use of peat, along with a desire to explore possible uses for biochar and a crop residue from hemp cultivation. LÄS MER

4. 23. Life Cycle Assessment of a small scale, solar driven HVR water purification system

   Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

   Författare :Sharang Kolathur; [2022]
   Nyckelord :life cycle assessment; air gap membrane distillation; solar energy; levelized cost; grid operated system; livscykelanalys; luftgapmembrandestillation; solenergi; utjämnade kostnader; nätdrivet system;

   Sammanfattning : Water purification systems have made access to drinking water easier by treating water sources which previously could not be used for drinking. Such systems however require energy and materials to build and operate which means they have environmental impacts. LÄS MER

5. 24. Numerisk modellering av tvåfasströmning och syretransport i bubbelkolumner : Metodutveckling för att förutsäga syretransportshastigheten i rent vatten och surfaktantlösningar

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

   Författare :Fredrik Andersson; [2022]
   Nyckelord :Bubbelströmning; bottenluftning; syresättning; surfaktanter; computational fluid dynamics;

   Sammanfattning : I samband med det globala samhällets ökande populationsmängd och ekonomiska utveckling ökar färskvattenkonsumtionen och mängden avloppsvatten som produceras. Avloppsvatten behöver renas innan det släpps ut för att inte påverka miljön negativt. LÄS MER

7. 25. Purification of Volatile Organic Compounds in Channeled Ventilation Pipes at the Sysav Water Treatment Plant for Hazardous Waste

   Master-uppsats, Lunds universitet/Kemiteknik (CI)

   Författare :Erik Wiktorsson; [2022]
   Nyckelord :VOC; Zeolite; Catalytic combustion; Sysav; Chemical Engineering; Chemistry; Technology and Engineering;

   Sammanfattning : Several channeled emissions at the Sysav water treatment plant for hazardous waste as of December 2021 exceed permitted levels of unknown volatile organic compounds (VOCs) stated in the European Parliament councils’ directives 2010/75/EU. A range of possible treatment methods are briefly discussed before zeolite adsorption, and thermal regeneration followed by catalytic combustion is decided to be the method of greatest feasibility and is the subject of further investigation. LÄS MER