Authors:
Lozan, Raisa; Tarita, A.; Sandu, Maria; Mosanu, Elena; Procopii, Diana
Lozan, Raisa; Tarita, A.; Sandu, Maria; Mosanu, Elena; Procopii, Diana
Conference: International Symposium “The Environment and the Industry”
Date: November 16-18, 2011
Location: Bucharest, Romania
Published: 2011
Volume: I
Keywords:
Surface water
BOD
COD
Nitrogen compounds
Moldova
Surface water
BOD
COD
Nitrogen compounds
Moldova
Abstract:
There are presented the results obtained on the degree of transformation of organic and inorganic substances in water units have been performed on laboratory modeling of natural surface waters, particularly small rivers, which often serve as receptors of wastewater discharged. Decomposition of dissolved substances in water under normal conditions takes place under the action of complex processes in chemical and biochemical data. Particular importance is assigned biochemical processes related to the vital activity of microorganisms that can take place both in the presence of oxygen (aerobic conditions) and in his absence (anaerobic). Flowing water, loaded (polluted) with so many residues cannot be treated in a natural way, and optimal conditions for microorganisms in river water based on the principle filtration and oxygenation were created in laboratory conditions. For enrichment of the samples with oxygen was done on artificial aeration by bubbling air at additional time intervals (3 hours). The results show that supplementary oxygen enrichment increases the biochemical oxidation of organic matter and ammonium ions contained in the water, settling organic matter content decrease by approx. 74% after an aeration period of 6 hours and ammonia approx. 86%.
There are presented the results obtained on the degree of transformation of organic and inorganic substances in water units have been performed on laboratory modeling of natural surface waters, particularly small rivers, which often serve as receptors of wastewater discharged. Decomposition of dissolved substances in water under normal conditions takes place under the action of complex processes in chemical and biochemical data. Particular importance is assigned biochemical processes related to the vital activity of microorganisms that can take place both in the presence of oxygen (aerobic conditions) and in his absence (anaerobic). Flowing water, loaded (polluted) with so many residues cannot be treated in a natural way, and optimal conditions for microorganisms in river water based on the principle filtration and oxygenation were created in laboratory conditions. For enrichment of the samples with oxygen was done on artificial aeration by bubbling air at additional time intervals (3 hours). The results show that supplementary oxygen enrichment increases the biochemical oxidation of organic matter and ammonium ions contained in the water, settling organic matter content decrease by approx. 74% after an aeration period of 6 hours and ammonia approx. 86%.