Essays about: "volatile fatty acids"

Showing result 1 - 5 of 40 essays containing the words volatile fatty acids.

  1. 1. Stabilizing biogas processes at high ammonia : effects of acetate pulse-feeding on the microbial population

    University essay from SLU/Department of Molecular Sciences

    Author : Oscar Dolk; [2020]
    Keywords : biogas; anaerobic digestion; ammonia inhibition; acetate enrichment;

    Abstract : This study investigated the problem of ammonia inhibition in biogas reactors, commonly occurring when protein rich substrates are used in anaerobic digestion processes. Ammonia inhibition is one of the foremost causes of failure in anaerobic digestion, leading to process instability, with symptoms commonly expressed as; reduction in biogas produced, decreased methane content in the gas and accumulation of volatile fatty acids. READ MORE

  3. 2. Edible Fungal Production using Acetic Acid as Carbon and Energy Source

    University essay from Högskolan i Borås/Akademin för textil, teknik och ekonomi; Högskolan i Borås/Akademin för textil, teknik och ekonomi

    Author : Barbara Mae Alontaga; Anna Axebrink; [2020]
    Keywords : VFA; Volatile fatty acid; acetic acid; Fungi; Carbon source; Energy source;

    Abstract : Volatile fatty acids (VFAs) have become attractive and gained high research interest due to its significance for the chemical industry and economical advantage. These acids can be produced by utilizing organic waste such as food waste as substrate through anaerobic digestion. READ MORE

  4. 3. Volatile fatty acid production and application as external carbon source for denitrification

    University essay from KTH/Hållbar utveckling, miljövetenskap och teknik

    Author : Cora Michelle Döhler; [2020]
    Keywords : VFAs; co-fermentation; primary sludge; food waste; denitrification; external carbon source; MBBR;

    Abstract : By rethinking wastewater treatment plants (WWTPs) as resource recovery facilities, it is possible to de- velop the next generation of WWTPs. Moreover, it allows to accomplish environmental goals, such as reducing the CO2 footprint, and comply with increasing effluent standards regarding the concentration of nitrogen in a more sustainable way. READ MORE

  5. 4. Polyhydroxyalkanoate Production from Municipal Waste Streams

    University essay from KTH/Resursåtervinning

    Author : Elsa Eriksson; [2020]
    Keywords : Polyhydroxyalkanoate; volatile fatty acids; mixed culture; bioreactor; municipal waste streams; Polyhydroxialkanoat; flyktiga fettsyror; blandad kultur; bioreaktor; kommunalt avfall;

    Abstract : Polyhydroxyalkanoates (PHAs) are a group of bioplastics, which are produced through microorganisms. They are accumulated in granules inside bacteria’s cell cytoplasm and serve as an energy reserve. READ MORE

  6. 5. Development of a GC Method for the Quantification of Short Chain Carboxylic Acids in Aqueous Solution

    University essay from Linköpings universitet/Institutionen för fysik, kemi och biologi

    Author : Anton Åkervall; [2020]
    Keywords : DAI-GC-FID; Direct Aqueous Injection; Gas Chromatography; Flame Ionization Detector; SCFA; Short Chain Fatty Acids; Formic Acid; Acetic Acid; Lactic Acid; EGR; Exhaust Gas Recirculation; CAC; Charged Air Cooler; FFD; Fractional Factorial Design;

    Abstract : Petroleum powered vehicles emit volatile organic compounds (VOCs) through combustion that contributes to the pollution of the environment. A technique in the 1970s was developed to decrease these emissions, especially for nitrogen oxides (NOx) and sulphuric oxides (SOx) which is called exhaust gas recirculation (EGR). READ MORE