Essays about: "oxygen nitrogen uptake"

Showing result 1 - 5 of 9 essays containing the words oxygen nitrogen uptake.

1. 1. Closed ecological life support systems : cycling of carbon, nitrogen and water

   University essay from SLU/Dept. of Ecology

   Author : Hugo Persson; [2020]
   Keywords : closed ecological system; cycling; closure; life support; biosphere; CEEF; MELiSSA; Biosphere 2; bioregenerative; CELSS; environmental;

   Abstract : Materially closed life support systems containing biological components that provide atmosphere, food and water for a human crew has been investigated for use in space travel since the 1960s. The internal cycling of organic material is the essence of these systems and their design and function is the question at issue for this thesis, which has been conducted as a literature study. READ MORE

3. 2. Photosynthesis response to temperatures – A study of fertilized and unfertilized Picea abies : Fotosyntes i respons till temperatur – En studie av gödslad och ogödslad Picea abies

   University essay from Linnéuniversitetet/Institutionen för skog och träteknik (SOT)

   Author : Anna Schyman; [2018]
   Keywords : photosynthesis; CO2; nitrogen; Picea abies; Rubisco;

   Abstract : The effect climate change has on forest trees is a large scaled topic. It is to believe that one of the largest threat to the environment today is global warming (IPPC, 2007). The use of fossil fuels seems to be the big threat with its greenhouse gas (GHG) emission and therefore forest is of interest. Forest contributes in several ways. READ MORE

4. 3. Biodiesel and Hydrogen Production : A Study of Nostoc sp. in Pulp and Paper Wastewater

   University essay from Umeå universitet/Institutionen för tillämpad fysik och elektronik

   Author : Duane Kimani; [2016]
   Keywords : Bioenergy; Hydrogen Production; Biodiesel; Cyanobacteria; Wastewater treatment;

   Abstract : The modernized world is over-consuming low-cost energy sources that strongly contributes to environmental stress. As a consequence, the interest for environmentally friendly alternatives has increased immensely. One such alternative is utilizing the diazotrophic nature of the heterocystous filamentous cyanobacteria Nostoc sp. READ MORE

5. 4. Biological phosphorus removal from wastewater with a moving bed biofilm reactor process

   University essay from Lunds universitet/Kemiteknik (CI)

   Author : Rebecca Arvidsson; [2015]
   Keywords : biological wastewater treatment; EBPR; MBBR; denitrifying phosphorus removal; vattenförsörjningsteknik; avloppsteknik; water engineering; environmental engineering; Technology and Engineering;

   Abstract : The human population is increasing and more wastewater, rich in nutrients, is produced. Increased levels of nutrients such as phosphorus, nitrogen and organic matter in water bodies present a risk for eutrophication, toxicity to the water-living fauna and oxygen depletion. READ MORE

6. 5. Evaluation of Nitration/Anammox process by bacterial activity tests.

   University essay from KTH/Mark- och vattenteknik

   Author : Anna Mika; [2015]
   Keywords : Partial Nitritation Anammox process; Integrated fixed-film acti-vated sludge IFAS reactor; Batch tests; Specific Anammox Activity SAA ; Nitrate Uptake Rate NUR ; Oxygen Uptake Rate OUR ; Ammonium Oxi-dizing Bacteria AOB ; Nitrite Oxidizing Bacteria NOB ; Heterotrophic bac-teria;

   Abstract : Partial Nitritation/Anammox process (deammonification process), by which occurs oxidation of ammonium to nitrogen gas by autotrophic bacteria in anaerobic conditions, considered to be cost-effective and environmentally friendly method of nitrogen removal. Present research work focuses on achieving a high nitrogen removal degree, thanks to Anammox bacteria, while providing the best performance of the ongoing process. READ MORE