Banca de DEFESA: MILLA GOMES ALBUQUERQUE
Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.STUDENT : MILLA GOMES ALBUQUERQUE
DATE: 20/05/2022
TIME: 09:00
LOCAL: meet.google.com/sec-ooam-pts
TITLE:
Evaluation of dog manure for energy purposes and utilization of biosolids.
KEY WORDS:
Domestic animals; energy use; metano.
PAGES: 75
BIG AREA: Engenharias
AREA: Engenharia Sanitária
SUMMARY:
The current family model, most often, is composed of one or more animals where dogs and cats are present, contributing significantly to the production of waste, bringing risks to human health. In 2018, it was reported that in Brazil there was a population of 54.2 million dogs, where they may be concentrated in homes, kennels, zoonosis control centers (CCZ), society organizations focused on the rescue of animals (pet ONGs) and some are in street situation, the amount generated by these animals was visualized in an average of 340 g/day of waste. The problem was exalted due to the problems related to sanitary issues and the production of greenhouse gases, but it was also realized that it was necessary to pay attention to issues related to the proliferation of zoonotic diseases. One type of treatment for the waste is the process of anaerobic biological degradation (anaerobic digestion) of the organic matter present in the biomass, this produces biogas where methane (CH4) that represents about 60 to 80% in the volumetric composition of the mixture, being a colorless and combustible gas with high calorific value. Depending on the percentage of methane in biogas, its calorific value can vary from 5,000 to 7,000 kcal/m³. Given the context described, it was necessary to produce information regarding the potential production of CH4 from dog waste, with a view to its energy recovery and proper disposal in the environment, with the help of biochemical methane potential (BMP) tests that evaluate the ability to degrade solid or liquid substrates through the generation of biogas and CH4 under standard conditions, subsequently certifying whether the experimental data are within the expected through kinetic analysis using kinetic modeling based on the maximum potential of biogas and CH4 of the substrates. To this end, it was proposed to determine the per capita production of waste produced by dogs belonging to the Canil do Corpo de Bombeiros de Pernambuco; to characterize these wastes through physical-chemical tests; to evaluate the potential for CH4 and biogas production through Biochemical Methane Potential (BMP) tests on a laboratory scale; test 05 kinetic models (first order, logistic, modified Gompertz, Fitzhurgh and cone) from the experimental data; and, finally, propose a more appropriate alternative sanitary management for the biosolids according to the research results. The results obtained were that the puppies have a per capita production of 215.8 g/day. The physicochemical characterization resulted in pH, electrical conductivity, moisture, total solids, COD, alkalinity and other values of 7.58, 7053 ms/cm, 67.44%, 32.56%, 4311.11 mgO2L-1 and 3103.54 mgCaCO3L-1, respectively; The methane potential found was 99.63 Nml. gSV-1 (with bicarbonate) and 123.79 Nml.gSV-1 (without bicarbonate); And the dog waste produced a high methane concentration of approximately 79%. With this, it was realized that dog waste is an excellent substrate for anaerobic digestion; the tested kinetic models presented excellent fits with the experimental data; and that the introduction of sodium bicarbonate presented a negative impact on the potential methane generation, but bicarbonate showed positive results in the speed of biodegradation, in the stabilization time of organic matter.
BANKING MEMBERS:
Externa à Instituição - LILIANA ANDREA DOS SANTOS
Interna - 2545388 - ROSANGELA GOMES TAVARES
Externa ao Programa - 3300999 - ROSSANNA BARBOSA PRAGANA
Presidente - 1743265 - VALMIR CRISTIANO MARQUES DE ARRUDA