New mathematical model of particle size distribution for swine building dust.

Posted in: Environment by admin on January 1, 1995 | No Comments

Particle size distribution is important to characterize airborne dust and to design particulate matter control strategies. New data are needed on particle size distribution in swine buildings, and the existing particle size distribution models need to be evaluated. The log-normal, power law, and Weibull models did not adequately describe the particle size distribution of dust samples collected in rooms housing pigs. An alternative two-parameter empirical model was developed that fit the data much more closely than the other models. The parameters of the particle size distribution function did not vary significantly among rooms housing pigs in different stages of production, suggesting that similar dust control strategies may be developed for a wide variety of pig housing facilities.

Minimum Distance Separation I (MDS I)

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Implementation guidelines are presented for the determination of minimum distance separation between livestock production units or farms and other rural land use. The document is to be used when planning and development applications are realized or reviewed. The required separation distances between existing farm and new non-farm uses are provided considering the animal species, and the livestock units or potential livestock units. A data sheet can be directly uses to present the information regarding a farm and neighbouring land uses.

Treatment of Swine Wastes by High-Rate-Modified-Anaerobic-Proces (HRAMP).

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The technology discussed here is efficient for operating temperature of 25 to 30 C so it is more efficient in warm climates where the outside temperature stays always high.

Options for Managing Odor.

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In 1993 after the North Carolina General Assembly and the North Carolina State University recognized that swine odor problems had to be address in a specific way, the Swine Odor Task Force was formed. Two broad questions were to be answered and they are: “What are the primary sources and causes of odors from swine operations? and How can those odors be reduced or make less offensive?”. The swine production has doubled in North Carolina in the last four years with no real adjustment to environmental considerations and manure management and also increasing contacts between non-farming rural residents and farms. In many communities, odor complaints started making the news. The answer on the questions are presented in this report and information about the industry growth, public conflicts, odors, waste management, water quality are presented. Options for odor reduction are also presented for now and for the future. The main avenues toward odor reduction are related to overall better management thorough out the production.

This document covers well the situation of odour and the information is presented in order to be understood by a broad group of reader. However it is not possible to refer to the information sources used in order to write this report as the references are not given.

Cross Seasonal Studies of Airborne Microbial Populations and Environment in Swine Buildings: Implications for Worker and Animal Health

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Effect of litter oiling and ventilation rate on air quality, health, and performance of turkeys.

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An experiment was conducted to study the effects of the application of rapeseed oil to litter, and ventilation rate, on the health status and growth performance of male heavy turkeys at 16 weeks of age. Litter oiling and increased ventilation rate significantly reduced the concentration of aerosol dust particles and the incidence of lung lesions.

Minimum Distance Separation II (MDS II)

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Implementation guidelines are presented for the determination of minimum distance separation between livestock production units or farms within rural areas. The document is to be used when planning and development applications are realized or reviewed. A data sheet can be directly uses to present the information regarding a farm about the farm and a calculation help determine the distances for the location of the building considering the barn odour potential for given animal species.

A Preliminary Study of Piggery Waste Treatment by an Upflow Sludge Bed Anaerobic Reactor and a Packed Bed Anaerobic Reactor.

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Two different reactor techniques have been used and compared. For the anaerobic packed bed reactor the reactor itself is filled with a support that increase the contact area between the micro-organisms and the manure to be treated. For the sludge bed, the micro-organisms remain in the sludge bed in the bottom of the reactor. Such treatment techniques are more efficient when the temperature in the bioreactor stays relatively high, the manure degradation from the micro-organisms activity is thus more efficient. The climate of Cuba and Mexico are well advantaged with their yearly high ambient temperature.

Odor and Odor Policy Criteria

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Very general information is given on the odor and gas emissions, human health and perceptions, odor control technologies and measuring methods. The criteria for establishing policies on odor are presented. Those policies can be either based on actual odor emission, on separation distances, on odor emissions modeling and finally on nuisance complaints.

Airborne Dust Concentrations in Livestock Buildings and the Effect of Feed

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