Experiences with Biofilter on a Slatted Floor Hog Barn

Posted in: Environment by admin on January 1, 1999 | No Comments

This tudy examined th use of a biofilter for removing odourous gases from exhaust air from a slatted floor pit manure storage swine finishing facility. The objectives of the study were to determine the amount of surface area of biofilter is required for hog space, what the effective residence time of the biofilter is, how much odour can be removed from the air and optimal conditions that promote bacterial growth.

CoveredLaggon System for Swine Waste Treatment and Energy Recovery

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A covered anaerobic lagoon was studied and evaluated its impact on water quality, flow rate measurements, pathogens, odour and biogas production. A two lagoon series was used for waste management, a covered anaerobic lagoon as primary treatment and a traditional lagoon as storage. To monitor performance of the lagoon water quality samples were taken from raw manure and from the covered lagoon. Total phosphorus (TP), ortho-phopsphorus (OP), chemical oxygen demand (COD), total organic carbon (TOC), total solids (TS) and volatile solids (VS) were reduced by 74%, 58%, 94%, 93%, 75% and 87% respectively in the covered lagoon system. When pit management included discharging pit every eight days these levels decreased by 62%, 58%, 28%, 18%, 23% and 27% respectively. When pit discharge was moved from 8 to 4 days a significant loading of TKN, NH3-N, TP, OP, COS, TS and VS was observed. Methane production in the anaerobic lagoon was affecrted by discharge frequency and temperature. Significant pathogen reduction was observed. Total coliforms were reduced by three magnitudes in the covered lagoon and one magnitude in the storage lagoon. E. Coli were reduced by 2.5 magnitudes in the covered lagoon and 70% in the storage lagoon. Finally, odour intensity, irriation intensity and unplesantness were reduced by 24%, 37% and 16% respectively in the covered lagoon and 68%, 83% and 33% respectively in the storage lagoon.

Evaluating the Use of Straw and Other Floating Materials to Control Odor Gases from Pig Manure Storage Units

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This study demonstrated that straw applied to outdoor manure storage and other floating covers can effective reduce odour and H2S emissions from these units. These covers are cost effective, ranging in price from $0.08 per square foot for straw cover or $0.40 per square foot for a more premanenet geotextile cover. However, these covers are not without there challenges. The length of time the straw covers stayed afloat varied accordingly to factors like rainfall, depth of manure storage, surface area and manure characteristics. As well, larger manure storage units increase the difficulty in applying the straw in a evenly distributed pattern. During the manure removal process, additional agitation may be required in order to incorporate the straw in the manure.

IMPROVING THERMOPHILIC ANAEROBIC DIGESTION OF SWINE MANURE

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Hydrologic Monitoring to Characterize Dominant Controls of Ground-Water Flow and Transport in An Area of Confined Animal Operations on a Mantled Karst Terrane, Northwestern Arkansas

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Methane emissions from an anaerobic swine lagoon

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PSC Elstow Feed Grain Utilization

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Performance and carcass quality of growing-finishing pigs submitted to reduced nocturnal temperature

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Summer months bring elevated temperatures, which can reduce pig growth rate by decreasing feed intake. It has been suggested that a reduced temperature setpoint during summer months could sustain pig performance by perhaps modifying pig eating behavior and stimulating the average daily feed intake. Both a pilot study and a large scale experiment were conducted to evaluate the impact of a reduced nocturnal temperature strategy on the performance and carcass quality of growing-finishing pigs over summer months. The reduced temperature setpoint was set 6A?A?C lower than typical commercial barn temperature setpoints. The rooms with reduced temperature setpoints resulted in a lowered nocturnal room temperature, 1.6A?A?C cooler at night, but no effect on daytime room temperature. The average daily temperature fluctuation in the reduced nocturnal temperature (RNT) rooms was increased by 2.1A?A?C. In the large scale trial, feed intake and ADG was higher than in the control rooms. These results were not found to be statistically significant; however, reducing temperature setpoint could provide a net return of 0.80 CAN$/pig sold raised during summer months in Saskatchewan.

Pathophysiology of bit control in the horse.

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Responses of piglets to early separation from the sow.

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