The adoption of intensive pig farming systems brought economies of scale, greater productivity and logistic gains, but it increased the incidence of infections and animal stress levels, resulting in bouts of infectious diseases and making the use of antimicrobials in subtherapeutic or preventive doses necessary to promote growth and to mitigate the occurrence of diseases.

However, the rise of viral infections in recent years, the increase in bacteria that are resistant to antimicrobials ...

Status: Completed     Start date: Tue Aug 01 00:00:00 GMT-03:00 2017

The main environmental problems associated with the waste produced in intensive pig farming are its high organic load, high amount of nutrients, the presence of some metallic species and of micro-organisms, some of which are known pathogenic agents. In general, the waste treatment systems in pig farms still lack the ability to reduce or eliminate pathogenic agents from the waste produced, a fact which makes it difficult to reuse the water in the very facility or even in agriculture. Seasonal flu

Status: Completed     Start date: Thu Jan 01 00:00:00 GMT-03:00 2009

The process of organic waste biodigestion is quite old, as the first unit was installed in Bombay, India, in 1819; in Australia, a company has produced and industrialized methane from sewage since 1911. China has 4.5 million biodigesters that produce gas and organic fertilizer, the main role of which is sanitation in rural areas. However, different aspects related to biodigesters are still lacking. This work aimed at studying and improving a biodigester system, and its general goal was the devel

Status: Completed     Start date: Sun Apr 01 00:00:00 GMT-03:00 2007