Banca de DEFESA: GIOVANA AGUIAR BATTISTI KROTH

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : GIOVANA AGUIAR BATTISTI KROTH
DATE: 30/10/2020
TIME: 09:30
LOCAL: Web Conferência via xxx - xxxx
TITLE:

Composting of Laying Poultry Carcasses: Assessment of Degradation Efficiency and Stabilization by Monitoring of Physical-Chemical and Microbiological Parameters.

KEY WORDS:

composting, laying hen, inoculante, grinded, agriculture waste.

PAGES: 45
BIG AREA: Ciências Agrárias
AREA: Medicina Veterinária
SUMMARY:

Even though composting is an extensively studied technique, several factors continue to hinder its efficiency and applicability. In addition, there are no in-depth and numerous studies with carcasses of laying birds, on a full scale, using different treatments. Thus, the objectives of this work were: To evaluate, in physico-chemical and microbiological terms, the efficiency of different composting conditions regarding the degradation and stabilization of laying bird carcasses, including specific bacterial inoculation as potentially accelerating the process. 600 laying hens were used, 40 in each treatment containing whole hens (treatments 1 and 2, without and with bacterial inoculation, respectively) and 60 in treatments with crushed hens (treatments 3 and 4, with and without bacterial inoculation, respectively). Each treatment contained 115 kg of wet shavings (55%), and approximately 78 kg (T1 and T2) and 117 kg (T3 and T4) of carcasses. The initial C / N ratio was 11.56 for T1 and T2 and 9.85 for T3 and T4. The cells (masonry, 1 m3), were placed in a screen-protected and covered environment. Temperature, conductivity, humidity, pH and microbiological activity (hydrolysis of fluorescein diacetate - FDA) were measured weekly. Monthly, several other parameters were evaluated, such as Coliforms Escherichia coli, Total Coliforms, Clostridium perfrigens and Salmonella spp., Biochemical Oxygen Demand (BOD), ash content and some nutrients. It was identified that the T3 and T4 treatments presented a significantly higher decomposition rate than T1 and T2, considering the windrow temperature behavior. The stabilization of temperatures, by treatment, occurred in: T1 49 days and 36.4 ° C; T2 55 days and 37.9 ° C; T3 56 days and 37.8 ° C; T4 51 days and 38.0 ° C. In the same period, T3 and T4 remained 5 ° C above T1 and T2, respectively. The microbiological activity (AM) was increasing in all treatments, with brief differences between them, while there was a reduction in BOD and temperature. Although the initial C / N ratio in T3 and T4 is less suitable for the composting process, the grinding of the carcasses enabled the stability of a greater number of birds in the same space and time, proving to be potentially advantageous. At the end, the compounds were analyzed based on some parameters of Normative Instruction (IN) No. 27/2006, as amended by IN 7/2016 (ANNEX V) and IN 25/2006 of the Ministry of Agriculture, Cattle and Supplying.

BANKING MEMBERS:
Externo ao Programa - 586.249.379-49 - CLAUDEMIR MARCOS RADETSKI - STRASBOURG
Presidente - 1836822 - CLEDER ALEXANDRE SOMENSI
Externo à Instituição - EVERTON LUIS KRABBE