Der Shop des Honighäuschens

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Hunde züchten
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Mykozönosen von Wurzel und Stamm von Jungbäumen unterschiedlicher Bestandsbegründungen
92,00 € Add to cart
Mit den Ohren eines Hundes
22,00 € Add to cart
Unser Katzenalltag ist besonders
21,90 € Add to cart
Hunde-Trainingstagebuch Hundeerziehung
7,95 € Add to cart
Style diversity in Asteraceae: morphology, anatomy, phylogeny, and function
139,00 € Add to cart
Sehr geehrter, lieber Herr Keiler
19,95 € Add to cart
$Honighäuschen (Bonn) - As the number of biogas plants expanded in recent years significantly, the supply of nutrients per hectare in livestock intensive regions has also increased. Hence, nutrient and digestate management is becoming more important for the biogas plants operators. Therefore, the objectives of the present thesis were to investigate the technical applicability of solar drying systems with the additional use of waste-heat from biogas cogeneration plants to improve the efficiency of the drying line and to concentrate the nutrients in digestate. Additionally, this thesis focused on the volatilization of nitrogen during digestate drying and further to investigate the short-term plant uptake of nitrogen and phosphorus for differently processed digestate. The technical applicability was tested in trials in a large-scale hybrid waste-heat/solar dryer to study the influence of additional waste-heat utilization from a combined heat and power unit and a micro turbine on the drying process. Water evaporation and energy consumption of the drying process were measured to determine the drying performance and the drying behavior under different operating modes. The nitrogen emissions in the exhaust air of the large-scale hybrid waste-heat/solar dryer were detected by Fourier transform infrared spectroscopy. With the results of the measurements, the volatilization of nitrogen in the form of ammonia was calculated to quantify the emission rate and the nitrogen loss during the drying process for untreated digestate and the separated solid fraction of digestate. The short-term fertilizer quality of digestate was investigated in pot experiments with barley plants. The nitrogen and phosphorus uptake of the plants was determined for solid dried digestate, solid and liquid fractions of separated digestate and untreated digestate. Special focus was on the influence of substrate treatment on the nutrient uptake of the organic fertilizer. The study demonstrated that a hybrid waste-heat solar dryer presents a suitable low-maintenance and low-workload option. The drying of digestate leads to a concentration of phosphorus and organically bounded nitrogen.$
Drying of biogas digestate in a hybrid waste-heat/solar dryer and the effect on nitrogen emissions and fertilizer quality
30,80 € Add to cart
Entwicklung strategischer Marketingkonzepte für Forstbetriebe
19,80 € Add to cart
Welsh Corgi
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Molekularbiologische Untersuchungen zur Alkaloidsynthese bei Claviceps
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Mein Hund
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Asiatische Hornisse in der Region Bonn und Rhein-Sieg aufgetaucht

Der Shop des Honighäuschens

Hunde züchten

Mykozönosen von Wurzel und Stamm von Jungbäumen unterschiedlicher Bestandsbegründungen

Mit den Ohren eines Hundes

Unser Katzenalltag ist besonders

Hunde-Trainingstagebuch Hundeerziehung

Style diversity in Asteraceae: morphology, anatomy, phylogeny, and function

Sehr geehrter, lieber Herr Keiler

Drying of biogas digestate in a hybrid waste-heat/solar dryer and the effect on nitrogen emissions and fertilizer quality

Entwicklung strategischer Marketingkonzepte für Forstbetriebe

Welsh Corgi

Molekularbiologische Untersuchungen zur Alkaloidsynthese bei Claviceps

Mein Hund

Querdenker, Wespen und aculeate Hymenopteren

Dachdecker trifft Baumhummel – was tun?

Filialisierung bei Hornissen

Wildbienen, Bienenhotels und Kindergärten – Gehören Wildbienen zu Deutschland?

Ein Hornissennest in einem Rollladenkasten

Hilfe, eine riesige Hornisse baut bei mir