TY  - JOUR
A1  - Meyer-Kohlstock, Daniel
A1  - Haupt, Thomas
A1  - Heldt, Erik
A1  - Heldt, Nils
A1  - Kraft, Eckhard
T1  - Biochar as Additive in Biogas-Production from Bio-Waste
JF  - ENERGIES
N2  - Previous publications about biochar in anaerobic digestion show encouraging results with regard to increased biogas yields. This work investigates such effects in a solid-state fermentation of bio-waste. Unlike in previous trials, the influence of biochar is tested with a setup that simulates an industrial-scale biogas plant. Both the biogas and the methane yield increased around 5% with a biochar addition of 5%-based on organic dry matter biochar to bio-waste. An addition of 10% increased the yield by around 3%. While scaling effects prohibit a simple transfer of the results to industrial-scale plants, and although the certainty of the results is reduced by the heterogeneity of the bio-waste, further research in this direction seems promising.
KW  - Festphasen-Fermentation
KW  - Biogasanlage
KW  - Organischer Abfall
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20170406-31119
ER  - 
TY  - CHAP
A1  - Peter, Lutz
A1  - Kiewitt, Walter
T1  - Staubbelastung an Arbeitsplätzen in Bauschuttaufbereitungs-anlagen
N2  - Technologischer Ablauf in einer Bauschuttaufbereitungsanlage; Gefährdungen und Belastungen bei der Bauschuttaufbereitung, Schwerpunktaktion zur messtechnischen Aufklärung der Staubbelastung der Beschäftigten bei der Bauschuttaufbereitung, Durchführung der Messungen, Auswertung. Die dargestellten Untersuchungsergebnisse belegen, dass durch gezielte Maßnahmen die Staubkonzentrationen unter die vom Gesetzgeber vorgegebenen Grenzwerte gesenkt werden können. Bauschuttaufbereitungsanlagen ohne jegliche Einrichtungen zur Staubminimierung sind aus der Sicht des Arbeitsschutzes nicht tolerierbar.
KW  - Arbeitsschutz
KW  - Baustelle
KW  - Bauschutt
KW  - Gefahrstoff
KW  - Messung
Y1  - 2001
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-3937
ER  - 
TY  - JOUR
A1  - Schmitz, Tonia
A1  - Kraft, Eckhard
T1  - Pilot scale photobioreactor system for land-based macroalgae cultivation
JF  - Journal of Applied Phycology
N2  - Marine macroalgae such as Ulva intestinalis have promising properties as feedstock for cosmetics and pharmaceuticals. However, since the quantity and quality of naturally grown algae vary widely, their exploitability is reduced – especially for producers in high-priced markets. Moreover, the expansion of marine or shore-based cultivation systems is unlikely in Europe, since promising sites either lie in fishing zones, recreational areas, or natural reserves. The aim was therefore to develop a closed photobioreactor system enabling full control of abiotic environmental parameters and an effective reconditioning of the cultivation medium in order to produce marine macroalgae at sites distant from the shore. To assess the feasibility and functionality of the chosen technological concept, a prototypal plant has been implemented in central Germany – a site distant from the sea. Using a newly developed, submersible LED light source, cultivation experiments with Ulva intestinalis led to growth rates of 7.72 ± 0.04 % day−1 in a cultivation cycle of 28 days. Based on the space demand of the production system, this results in fresh mass productivity of 3.0 kg m−2, respectively, of 1.1 kg m−2 per year. Also considering the ratio of biomass to energy input amounting to 2.76 g kWh−1, significant future improvements of the developed photobioreactor system should include the optimization of growth parameters, and the reduction of the system’s overall energy demand.
KW  - Makroalgen
KW  - Photobioreaktor
KW  - macro algae
KW  - photobioreactor
KW  - ulva intestinalis
KW  - LED light source
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20211207-45401
UR  - https://link.springer.com/article/10.1007/s10811-021-02617-7
VL  - 2021
SP  - 1
EP  - 10
ER  -