Dust Effects on Odor and Odor Compounds

Posted in: Environment by admin on January 1, 1997 | No Comments

The influence of dust particules on odors coming from livestock building was evaluated in laboratory using full-scale installations. The ventilation air coming from four nursery rooms ventilated separately passed through chopped cornstalks and corncobs used as substrate in four biofilters. Samples of the ventilation air before and after the biofilters treatments were taken for dust analysis (total dust concentration, the particule distribution) and odor threshold determination by olfactometry. The results obtained showed that the odor threshold could be reducted to up to 76% with particules removal of nearly 100%. These results agreed with previous work suggesting that dust particules are odor carrier as the odor compounds probably adhere to the particles. The biofilters used were effective in removing particules in excess of 10 microns.

The odor emission reduction by dust removal is very interesting. This work however doesn’t give any information about the investment and operation cost of such biofilters as booster fans have to be used to push the ventilated air through the filters. Dust removal would be even more interesting if the dust inside the building could be controled to improve the inside conditions for swine and workers.

Harmful Gas and Odor Emissions under Use of Feed and Slurry Additives

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This investigation was done on a laboratory scale with manure samples for the “oxygen information” substances (quartz or chalk powder), the manure acidification treatment (using lactic acid) and the manure algae treatment. The investigation on the Bentonite feeding additive and the manure yeast treatment were done directly in pig housing. The laughing gas mentioned in the abstract is NO2. The “oxygen information” substances highly advertised and commonly used in Germany, Austria and Switzerland is apparently “equipped with oxygen information by means of cosmic energy”.
Further tests have to be done on a farm scale for the products that worked well in laboratory before recommendations could be done and the impact of manure acidification on soil and crop production has to be verified.
Odour reduction is claimed but no results are shown to confirm it.

County Human Health Concerns from Air Pollution

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The Renville County’s involvement in the Hydrogen sulfide testing of potential odor emission source is discussed as well as a proposed odor ordinance being developed by the county. Summaries of different U.S. studies are also presented on H2S and odor and their effect on health.

Caracterisation hedonistique des odeurs par la mesure des reactions neurovegetatives (Odor hedonics caracteristics by autonomic responses measurements)

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Experiments have been done to link the autonomic responses (such as cardio-respiratory frequency, skin potential, resistance, temperature blood flow) and the subjective verbal responses resulting of induced odors (pleasant and unpleasant ones). Each individual has preferred channels responses in one or two autonomic parameters and the protocol and equipment allowed the verification of these reactions and the classification of the individuals by their specific reactions.
The autonomic responses are more informative because they are more diversified than the verbal responses and give information about the affective state of the subject exposed to an odor. Also in some cases autonomic responses can be registered while the subject is not reporting odor detection. The proposed method can make the link between the subjective reactions obtained by the autonomic responses and the

Links are being made between odor perception and the affective state of the person exposed to a specific odor; links that are not often made with verbal comments. This is interesting because this type of research could better understand the affective reaction to long unpleasant odor exposure.

Fertilizing Cropland with Swine Manure

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Different aspects of manure management are presented as manure should be considered has nutritive to crops and has having an economic value. The important elements of manure valorization are presented such ad manure inventory assessment with manure sampling and testing to obtain the nutrients content. The methods are presented with averaged values of nutrients in manure. The application rates are also discussed and some attention should be put to the fact that nitrogen is not 100% available the first year and a certain portion of the N is going to be used the 2nd and the 3rd year and is also going to be lost. The necessity of a multi-year plan is also presented including in that plan spreading priority and follow up with crop rotations. An important element of manure management is the spreader calibration and calculation methods are presented for solid and liquid manure. Incorporation soon after spreading is still the best way to valorize the value of manure.

This article is general and present the necessity of manure management to assure that the nutrients available are well utilize and that manure application doesn’t result in losses of nitrogen in runoff and nitrates found in the water. Manure analysis should be done as the values presented in the document are not recent and changes have occur in the diet that have direct link to the nutrients content.

Composting of Swine Manure Slurry to Control Odour, Remove Water, and Reduce Pollution Potential

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Behaviour of early-weaned pigs

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An experiment was conducted to investigate the effects of current early weaning practices on the behaviour of piglets in the nursery and through the grower/finisher phase. Two treatments were compared: weaning at 21 or weaning at 12 days of age. Treatments were housed in separate but identical on-site nursery rooms, and within the same grower/finisher rooms. Pigs weaned at 12 days of age were found to be slower to develop normal levels of eating behaviour than those weaned at 21 days of age, but did so by 48 h after weaning. During the subsequent 5 a

Understanding cow behavior.

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Environmental enrichment for dairy calves and pigs.

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When Sows Drink Less

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Limiting water to swine can result in water depravation and urinary tract ailments. The author looks at water requirements of swine and how temperature may affect this requirement. Pregnant sow water intake and feed comparisons are made.