John I. Sewell

Dairy Lagoon Effects on Groundwater Quality

ABSTRACT IN 1973 a primary anaerobic lagoon and effluent holding pond system was constructed (Fig. 1) to receive and treat the lot runoff and waste from the experimental dairy on the West Tennessee Experiment Station at Jackson. The dairy milks 110 cows and is equipped with an alley flush system utilizing recycled water from the holding pond, a reservior receiving effluent from the primary lagoon. The cows are confined to concrete alleys approximately 70 per-cent of the time. The objectives of this study were to eval-uate the effects of the lagoon system on nearby ground-water quality and to determine changes in holding pond water quality with time.

Treating Runoff from Agricultural Operations for Use As a Water Supply

ABSTRACT IN a 3 year study, the operation and input require-ments of various rural water treatment methods were investigated. Runoff was pretreated with sand filtration followed by treatments of chlorination, ozonation, or ultraviolet radiation. Results indicated that chlorination remains ef-fective and dependable, and that when chlorine, alone, can adequately treat water, it is a more practical solution than other treatments. Ozonation was im-practical for individual rural use. Ultraviolet radiation was effective in disinfecting water, but provided no treatment for excess organic matter or chemicals. Equipment investment for the various treatment facilities varied greatly, but operating costs were almost identical.

Floor Types and Ventilation on Beef Animal Performance

ABSTRACT A SHEET metal beef finishing barn A with two rows of 10 pens separated by a feeding alley and hav-ing open sides and enclosed ends was completed at The University of Tennessee Aluminum Company of America* (Alcoa) Farm. The facility (Fig. 1) was constructed from an existing barn with a concrete-slab floor remodeled to include 12 pens with experimental aluminum-slat floors and two pens with reinforced concrete-slat floors. The concrete-slab floor was left intact for six pens. In 1974, ventilation fans were provided for two aluminum-slat floor pens. Four feeding trials involving a total of 131 animals were conducted. Primary objectives of the study were to determine the effects of floor types and ventilation on animal perfor-mance and knee swelling. A secondary objective was to develop waste man-agement criteria for slatted-floor systems.