Swine Carcass Composting as Part of an Environmentally Friendly Production System

As a consequence of normal swine production, mortalities must be handled on a daily basis. Average death losses of 4100 kg/year (9,000 lbs/year) per 100 sows pose a significant management and disposal task for Iowa swine producers. Several methods of disposal have been used for this costly and time-consuming task

Survey Monitoring of Air Quality from Bedded Swine Systems

Six deep-bedded swine finishing production sites were surveyed for hydrogen sulfide, ammonia and odor concentrations. Each site was observed four different times with readings 6 times over a 36 hour period. Hydrogen sulfide, ammonia and odor were measured at the building edge and downwind 100 feet. Hydrogen sulfide and ammonia were measured 500 feet downwind also. The site averages for hydrogen sulfide were found to range from 25 to 228 ppb at the building edge, 2 to 11 ppb 100 feet downwind and 4 to 8 ppb 500 feet downwind. Ammonia site averages were found to range from 2 to 11 ppm at the building edge, undetectable with the chosen equipment (below 1 ppm) to 3 ppm downwind 100 feet and undetectable at 500 feet. Odor threshold site averages ranged from 130 to 580 at the building and 80 to 500 at a point 100 feet from the building

Case Study Comparison of Three Styles of Swine Finishers

Three styles of swine finishing facilities were compared to establish the economic benefit of each style of building. Styles included a curtain-sided finisher, a modified open front finisher, and a cargill unit. Information was collected on energy consumption, water consumption, animal performance, temperature performance, and carcass leanness. Preliminary results indicated the best feed efficiency occurred in the modified open front, whereas the lowest mortality occurred in the curtain-sided finisher. Temperature performance was much tighter in the curtain sided finisher than the other two building styles. A preliminary partial cost comparison indicated that the modified open front facility had the lowest cost with the curtain-sided and the modified open front both out performing the cargill uni

Colorado Native Plant Society Newsletter, Vol. 2 No. 6, November-December 1978

The Colorado Native Plant Society Newsletter will be published on a bimonthly basis. The contents will consist primarily of a calendar of events, notes of interest, editorials, listings of new members and conservation news. Until there is a Society journal, the Newsletter will include short articles also. The deadline for the Newsletter is one month prior to its release.https://epublications.regis.edu/aquilegia/1011/thumbnail.jp

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Lean Aircraft Initiative Plenary Workshop presentatio

Colorado Native Plant Society Newsletter, Vol. 3 No. 1, January-February 1979

The Colorado Native Plant Society Newsletter will be published on a bimonthly basis. The contents will consist primarily of a calendar of events, notes of interest, editorials, listings of new members and conservation news. Until there is a Society journal, the Newsletter will include short articles also. The deadline for the Newsletter is one month prior to its release.https://epublications.regis.edu/aquilegia/1012/thumbnail.jp

Survey of sediment quality in Sabine Lake, Texas and vicinity

The toxicity of sediments in Sabine Lake, Texas, and adjoining Intracoastal Waterway canals was determined as part of bioeffects assessment studies managed by NOAA’s National Status and Trends Program. The objectives of the survey were to determine: (1) the incidence and degree of toxicity of sediments throughout the study area; (2) the spatial patterns (or gradients) in chemical contamination and toxicity, if any, throughout the study area; (3) the spatial extent of chemical contamination and toxicity; and (4) the statistical relationships between measures of toxicity and concentrations of chemicals in the sediments. Surficial sediment samples were collected during August, 1995 from 66 randomly-chosen locations. Laboratory toxicity tests were performed as indicators of potential ecotoxicological effects in sediments. A battery of tests was performed to generate information from different phases (components) of the sediments. Tests were selected to represent a range in toxicological endpoints from acute to chronic sublethal responses. Toxicological tests were conducted to measure: reduced survival of adult amphipods exposed to solid-phase sediments; impaired fertilization success and abnormal morphological development in gametes and embryos, respectively, of sea urchins exposed to pore waters; reduced metabolic activity of a marine bioluminescent bacteria exposed to organic solvent extracts; and induction of a cytochrome P-450 reporter gene system in exposures to solvent extracts of the sediments. Chemical analyses were performed on portions of each sample to quantify the concentrations of trace metals, polynuclear aromatic hydrocarbons, and chlorinated organic compounds. Correlation analyses were conducted to determine the relationships between measures of toxicity and concentrations of potentially toxic substances in the samples. Based upon the compilation of results from chemical analyses and toxicity tests, the quality of sediments in Sabine Lake and vicinity did not appear to be severely degraded. Chemical concentrations rarely exceeded effects-based numerical guidelines, suggesting that toxicant-induced effects would not be expected in most areas. None of the samples was highly toxic in acute amphipod survival tests and a minority (23%) of samples were highly toxic in sublethal urchin fertilization tests. Although toxic responses occurred frequently (94% of samples) in urchin embryo development tests performed with 100% pore waters, toxicity diminished markedly in tests done with diluted pore waters. Microbial bioluminescent activity was not reduced to a great degree (no EC50 <0.06 mg/ml) and cytochrome P-450 activity was not highly induced (6 samples exceeded 37.1 ug/g benzo[a]pyrene equivalents) in tests done with organic solvent extracts. Urchin embryological development was highly correlated with concentrations of ammonia and many trace metals. Cytochrome P450 induction was highly correlated with concentrations of a number of classes of organic compounds (including the polynuclear aromatic hydrocarbons and chlorinated compounds). (PDF contains 51 pages

Colorado Native Plant Society Newsletter, Vol. 3 No. 4, July-August 1979

The Colorado Native Plant Society Newsletter will be published on a bimonthly basis. The contents will consist primarily of a calendar of events, notes of interest, editorials, listings of new members and conservation news. Until there is a Society journal, the Newsletter will include short articles also. The deadline for the Newsletter is one month prior to its release.https://epublications.regis.edu/aquilegia/1015/thumbnail.jp

Colorado Native Plant Society Newsletter, Vol. 2 No. 5, September-October 1978

The Colorado Native Plant Society Newsletter will be published on a bimonthly basis. The contents will consist primarily of a calendar of events, notes of interest, editorials, listings of new members and conservation news. Until there is a Society journal, the Newsletter will include short articles also. The deadline for the Newsletter is one month prior to its release.https://epublications.regis.edu/aquilegia/1010/thumbnail.jp

Colorado Native Plant Society Newsletter, Vol. 3 No. 3, May-June 1979

The Colorado Native Plant Society Newsletter will be published on a bimonthly basis. The contents will consist primarily of a calendar of events, notes of interest, editorials, listings of new members and conservation news. Until there is a Society journal, the Newsletter will include short articles also. The deadline for the Newsletter is one month prior to its release.https://epublications.regis.edu/aquilegia/1014/thumbnail.jp