Biotreatment of swine manure by production of aquatic valuable biomasses

Posted in: Environment by admin on January 1, 1998 | No Comments

Dust in Livestock Buildings (EIRC) French Version

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Siting and Swine Facilities – French Version

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Canola meal and enzyme supplementation

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Carbohydrases in 25% canola-meal diet consumed freely by weaned pigs: increased daily gain (up to 13%), increased feed intake (up to 16%), did not affect feed efficiency, reduced viscosity of digesta in ileum, and did not affect nutrient digestibility. Beneficial effects of enzyme supplementation to a wheat-canola meal diet fed to weaned pigs were not related to improved nutrient digestibility, but rather to increased feed intake. The increase in feed intake is hard to explain directly. However, reduced viscosity of digesta in the distal small intestine suggests that increased feed intake is related to an increased passage rate.

Draught animal welfare.

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Do domestic pigs prefer short-term to medium-term confinement?

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A review of the road transport of slaughter sheep.

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Use of local carbohydrate sources and a protein supplement by pig farmers in a Colombian village in the Andean Hills

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Management of Bedded_Pack Manure from Swine Hoop Structures

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Hoop structures are increasing in use throughout the mid-west United States and Western Canada. Due to their relatively new emergence manure management strategies are currently being developed. This study set out to examine the moisture and nitrogen variability within the bedding pack, and second to evaluate the effectiveness of four composting strategies. Moisture content of the bedding pack was determined by the resting area, which was interdependant on the season. Moisture content was higher in the dunging area (60-70% moisture) which promoted anaerobic conditions and therefore relatively little decomposition to the resting area.
Composting trials examined four alternatives: turned manure spreader built pile, non-turned manure spreader built pile, turned loader built pile and a non-turned loader built pile. The manure spreader built piles saw large volume and mass reductions relative to the non-turned loader built pile. However the amount of nitrogen contained in the manure was greatest with the non-turned loader built pile, less ammonia volatilization occurs due to the lack of turning.

Odor Carrying Characteristics of Dust from Swine Facilities

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Odour complaints represent a large number of the complaints centred around intensive swine production units. Previous studies have shown a correlation between odour and aeresol particles from dust buildings but three fundamental questions till need to be answered: what types of compounds make dust unpleasant? How much odour does it carry? What sizes of particles carry the most odour? Through the use of gas chromatography results show there are aprroximately 70-100 volatile compounds absorbed on dust, as well shows similar compounds between grower and finisher units with respect to peak retention time. These componds are similar in winrter and summer months, however their peak retention time varies between seasons. As well, the study indicated all rentention times of all major compounds was less than 22 minutes, indicating that indolic compunds are not associated witrh dust or feed.