Changes in chemical properties during composting of spent pig litter at different moisture contents

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

Gas Emissions from Swine Facilities (EIRC) French

Posted in: Prairie Swine Centre by admin on | No Comments

Sociology and Swine Facilities – French Version

Posted in: Prairie Swine Centre by admin on | No Comments

Evaluation of humidity sensors in a swine barn

Posted in: Prairie Swine Centre by admin on | No Comments

Humidity sensors are affected by the air quality in livestock buildings. New sensor models should be tested under actual barn conditions to assess their long-term integrity. An experimental procedure was developed to meet this requirement. After initial static and dynamic calibrations in a specially designed humidity chamber in the laboratory, the test sensors were installed in a livestock building for one year. Several times during the year, the sensors were temporarily removed from the barn and taken back to the laboratory for calibration against a reference hygrometer ad determination of static and dynamic properties including accuracy, hysteresis, and time response. A bank of 72 TDK humidity sensors with different filters and coatings were evaluated with this procedure in a grower/finisher room. The drift of various static and dynamic sensor characteristics over time, the reliability, and the durability of the sensors were identified and the best sensor treatment was selected. The results confirmed the value and practicality of the test procedure, and led to recommendations for the appropriate length of the in-barn evaluation period, calibration frequency, and required replication.

Stable vices: what are they, and can we prevent them?

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Behaviour, social interactions and lesion scores of group-housed sows in relation to floor space allowance.

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Early handling increases lamb affinity for humans.

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Cup Waterer Doesn't 'Runneth Over'

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This article compared two types of hog waterers. Two 1000 head, contract finishing buildings were used for the study. Single source pigs of a startweight 45-50lbs were used and entered the facility the same day. In a three month period, 10000 less gallons of water was used in the room with cup waterers compared to that in the nipple drinker room. Cup waterers, besides being low labour and low maintenance, can reduce the water bill and cost for manure removal. It was determined that bowl waterers made of cast iron with a porcelain finish were impossible to break with normal use.

Digestibility and nitrogen retention in fattening pigs fed different levels of ensiled cassava leaves as a protein source and ensiled cassava root as energy source

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Thermochemical Conversion of Swine Manure: Temperature and Pressure Responses

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The trend of hog production is to larger more intesnive operations. One of the largest impediments to these operations are manure and odour related problems. A thermochemical conversion (TCC) process is one where sufficient heat (160-250 C) and subsequent pressure applied to the manure for a period of 120-180 minutes resulting in swine manure sludge and oil products. The results found were preliminary, however, the TCC process was shown to reduce the chemical oxygen demand levels by 94% and approximately 8.5% of the volatile solids were converted into an oil product.