Aspectos ambientais, produtivos e econômicos do aproveitamento de resíduo úmido de cervejaria na alimentação de cordeiros em sistema de confinamento

Abstract

RESUMOObjetivou-se com este trabalho avaliar a geração e o poder poluente do resíduo úmido de cervejaria e determinar aspectos produtivos e a economicidade do uso desse resíduo em substituição ao alimento concentrado na alimentação de cordeiros confinados em fase de terminação. Foram utilizados 25 cordeiros, machos, não-castrados, da raça Texel, oriundos de parto simples, desmamados aos 69 dias de idade em média. Foram avaliados cinco níveis de substituição do alimento concentrado por resíduo úmido de cervejaria, sendo 0%, 25%, 50%, 75% e 100%. Termos para indexação: Confinamento, meio ambiente, ovinos, resíduo de cervejaria. ABSTRACTThe objectives of this work were to evaluate the generation and the pollutant power of brewery residues and to determinate the productive and economic aspects of the use of this residue as replacement to the concentrate meal on the diet of lamb in feedlots as the finishing phase. Twenty-five male, non-castrated Texel lambs, single born, weaned at the age of 69 days were used. They were offered diets with five levels (0%, 25%, 50%, 75%, and 100%) of brewery residues replacing the meal concentrate. The lambs were slaughtered 77 days after the installation of the experiment. For every 100 kg barley grain used as source material, 132.02 kg of brewery residue was generated. The brewery residue was classified as Class IIA and showed pH value of 4.63, for BOD 5 of 659 mg O 2 L -1 and for COD of 10769.9 mg O 2 L -1 , revealing that this residue has high pollutant charge. There was a quadratic effect on the dry matter food intake and a decreasing linear effect on the daily weight gain and the cold carcass weight with the increase in the level of brewery residues. The economical analysis showed that there was a linear decrease in the feed costs with the increase of the quantity of brewery residues in the diets. However, no effect of the inclusion level of the brewery residues on the profit related to live animal or carcass sales was verified. INTRODUÇÃODa mesma forma que aconteceu com a indústria, a evolução do agronegócio e o desenvolvimento dos processos de transformação de alimentos levaram à geração de muitos resíduos, sendo que estes são um dos principais problemas ambientais, não só do Brasil, mas do mundo como um todo (Giordano, 2000).Os resíduos gerados nos processos agroindustriais representam perdas econômicas no processo produtivo e, se não receberem destinação adequada, podem proporcionar problemas ambientais, em razão da sua carga poluidora. Dentre estes resíduos, existem vários que podem ser utilizados na alimentação de ruminantes, podendo ser citados, como exemplo, a polpa cítrica, a casca e o farelo de arroz, a torta de algodão e o resíduo úmido de cervejaria. Este último tem se destacado, uma vez que é gerado em grande volume durante o ano todo (Brochier, 2007).O resíduo úmido de cervejaria é resultante da fase inicial do processo de fabricação de cervejas, e apresenta-

Dry brewery residue in broiler chickens feed

“…Besides, the CRE contents detected in the current research were also similar to that obtained by Café et al (2012), of 0.44 mg dL -1 . The existence of alterations in the values of this variable is typically associated with pathological conditions, and its elevation is possibly indicative of a reduction of renal activity accompanied by a degeneration of the muscular tissue.…”

“…However, they were similar to that found by Café et al (2012) of 32.23 mg dL -1 TAG in the blood serum of broiler chickens at 42 days of age, created in a thermoneutral environment.…”

Use of dried brewers' grains instead of soybean meal to feed lactating cows

“…The use of agribusiness waste for ruminant feed provides a reduction in feed cost and allows for the reuse of organic material in animal production, thus preventing waste accumulation and environmental pollution (Brochier and Carvalho, 2009). Among the various industrial wastes, brewers' grains has increased due the excessive supply used for increased beer production in Brazil (Albuquerque et al, 2011).…”

“…Among the various industrial wastes, brewers' grains has increased due the excessive supply used for increased beer production in Brazil (Albuquerque et al, 2011). The amount of wet brewers' grains is 32.02% higher than the amount of barley used for the initial process of brewing beer (Brochier and Carvalho, 2009). High humidity of waste might limit its utilization on farms distant from the brewing industry, because the humidity prevents transportation and storage.…”

Residue of brewery on broiler nutrition

“…O resíduo de cervejaria apresenta cerca de 24% de proteína bruta e 2.500 kcal/kg de energia bruta, e pesquisas já demonstraram seu potencial de utilização na alimentação de cordeiros (Brochier andCarvalho, 2009, Gilaverte et al, 2011), cabras , suínos (Albuquerque et al, 2011) e bovinos (Geron et al, 2008 distribuídos em delineamento inteiramente casualizado.…”