Évaluation du rôle des bio-additifs dans la dégradation des boues de fosse septique et conception de méthodes de mesure de l'activité méthanogène

Authors: Laurens, Jean-Matthieu
Advisor: Dorea, Caetano ChangVanrolleghem, Peter A.
Abstract: Additives for septic tank treatment are available in order to improve their performance. However, their influence has not yet been proven. A research project was initiated to assess the influence of bio-additives on septic tank sludge degradation. The study was conducted at laboratory scale with regard to three treatment products tested on six different effluent samples from emptied septic tanks. A blank (without additive) was used as a reference to assess the natural degradation of septic tank sludge and to compare with the effects of the bio-additives. These samples were incubated at 35°C for ten days. In order to evaluate the bio-additive contribution, the following parameters were measured: total solids, volatile solids, chemical oxygen demand, fecal coliforms and methane production, and that before, halfway and at the end of each test. The statistical analysis of the results (analysis of variance and Dunnett’s test) was inconclusive to highlight a difference between the bio-additives and the reference at a confidence level of 5%. Another part of this project was to design laboratory methods for methane measurement. These tests were conducted at the same time as the bio-additives experiments. The statistical results seem conclusive as to the reliability of the measurements made with the experimental apparatus designed in the laboratory.
Document Type: Mémoire de maîtrise
Issue Date: 2017
Open Access Date: 24 April 2018
Permalink: http://hdl.handle.net/20.500.11794/27492
Grantor: Université Laval
Collection:Thèses et mémoires

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