Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"dairy slurry"”.
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Absorption of nitrogen from a liquid by pine bark
… from an aqueous solution and from a dairy slurry, in the laboratory and in a field treatment of dairy slurry. Preliminary experiments indicated that the initial nitrogen concentration of the solution had a significant effect on the rate of nitrogen absorption. The range of physical …
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International biogas applications
… have grown steadily in recent years. Animal slurry and sewage sludge have been traditionally used as feedstock for AD, however, substrates such as the organic fraction of municipal solid waste (OFMSW) and energy crops are preferred due to their higher methane yields. Concerns about the …
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Biomethane production from grass silage: laboratory assessment to maximise yields
… of grass silage and co-digestion with slurry, as would occur on Irish farms, is investigated in laboratory trials. Grass silage was shown to have 7 times greater methane potential than dairy slurry on a fresh weight basis (107 m3 t-1 v 16 m3 t-1). However, comprehensive trace element …
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Biomethane production from macroalgae
… from mono-digestion and co-digestion with dairy slurry revealed that both seaweeds could be digested at maximum biomethane efficiency to a loading rate of 4 kg VS m-3 d-1. Accumulation of salt in the digesters was a concern for long term digestion and it was reasoned that suitable …
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Soil properties, lime and phosphorus fertiliser management affecting grass production in Ireland
… (r = 0.48), while applications of organic P (dairy slurry) to low P and low pH soils showed greater returns in soil test P with 124% fertiliser P replacement value, when compared to chemical P additions in these incubated soils.><0.0001) with the change in soil P levels (-0.46 & -0.42). While …
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Phosphorus runoff potential of different sources of manure applied to fescue pastures in Virginia
… In the first experiment, four sources of manure (dairy slurry, piggery waste, beef solids, and poultry litter) and triple superphosphate (TSP) were applied iso-nitrogenously to pasture plots (1.5 m2, 10% slope) with 31 ppm Mehlich 1-P soil test. The P treatments were amended in spring at a rate of …
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Nitrogen dynamics and biological response to dairy manure application
… surface broadcast and subsurface injection of dairy slurry on nitrogen and carbon cycling, crop yield, and biologic responses to proxy soil health. In a forced air-flow laboratory incubation, manure injection reduced ammonia volatilization by 87% and 98% in a sandy loam and clay loam soil, …