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Showing result 16 - 20 of 61 essays matching the above criteria.

1. 16. Partial denitrification as nitrite provider for mainstream anammox

   University essay from Lunds universitet/Kemiteknik (CI)

   Author : Felix Wallin Holmin; [2020]
   Keywords : Water engineering; Environmental engineering; Mainstream anammox; Partial denitrification; PDA; MBBR; Nitrogen removal; Vattenförsörjningsteknik; Avloppsteknik; Technology and Engineering;

   Abstract : In traditional wastewater treatment, nitrogen is removed through the biological process combination of nitrification and denitrification. Although it is a well-established method, the need for aeration and possible addition of an external carbon source results in it being an energy-negative and costly process, thus making alternative methods for nitrogen removal compelling to examine. READ MORE

3. 17. Groundwater denitrification by fluidized bioelectrochemical systems

   University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

   Author : Lena Bonin; [2020]
   Keywords : Bioelectrochemistry; fluidized bed reactor; bioremediation; denitrification; groundwater; reduced graphene oxide;

   Abstract : Groundwater (GW) accounting for most of the freshwater available around the World, finding sustainable techniques to depollute it is of crucial importance for safe drinking water supply. The extensive use of fertilizers in the agriculture, as well as other anthropogenic activities, are contributing to the excessive nitrate levels in some aquifers. READ MORE

4. 18. Mainstream Deammonification process monitoring by bacterial activity tests

   University essay from KTH/Hållbar utveckling, miljövetenskap och teknik

   Author : Andrea Carranza Muñoz; [2020]
   Keywords : Ammonia Oxidizing Bacteria AOB ; Anammox; Bacterial activity; Deammonification; Heterotrophic bacteria; IFAS; Mainstream wastewater; Nitrite Oxidizing Bacteria NOB ; Nitrogen Removal.;

   Abstract : Deammonification is a widely used technology for side stream treatment with rich ammonium streams at relatively high temperatures, such as, the reject water coming from dewatering units in treatment of digested sludge and industrial wastewaters. The deammonification process has lower operational costs than conventional systems, consumes less energy, enables the increase of biogas production and it is easy to implement. READ MORE

5. 19. Volatile fatty acid production from co-fermentation of primary sludge and food waste without pH control

   University essay from KTH/Hållbar utveckling, miljövetenskap och teknik

   Author : Binyam Bedaso; [2019]
   Keywords : Volatile fatty acid; Co-fermentation; Primary sludge; Food waste;

   Abstract : The production of volatile fatty acids (VFAs) from waste stream is gaining high attention because of their high market value and wide range of applications. In this study, the production of VFA from co-fermentation of primary sludge from wastewater treatment plant and food waste without pH control was evaluated using a pilot-scale reactor in a semi-continuous mode of operation. READ MORE

6. 20. Application of volatile fatty acids from waste as an external carbon source for the denitrification process

   University essay from KTH/Hållbar utveckling, miljövetenskap och teknik

   Author : Chengyang Pan; [2019]
   Keywords : Volatile fatty acids VFAs ; Denitrification; External carbon sources; Wastewater treatment; Manometric method; Flyktiga fettsyror VFAs ; Denitrifikation; Externa kolkällor; Avloppsrening; Manometrisk metod;

   Abstract : The gap between resource demand for the industrialized world and non-renewable feedstock like fossil fuels, essential agricultural fertilizer is getting increasingly severe, which has resulted in alarming-increasingly impacts on worldwide environmental problems. Meanwhile, wastewater treatment plants (WWTPs), as an essential facility for urbanization, is also confronting new rising challenges such as energy consumption and operation costs rather than only improving effluent wastewater quality. READ MORE