TY  - JOUR
A1  - Hoffstadt, Kevin
A1  - Pohen, Gino D.
A1  - Dicke, Max D.
A1  - Paulsen, Svea
A1  - Krafft, Simone
A1  - Zang, Joachim W.
A1  - Fonseca-Zang, Warde A. da
A1  - Leite, Athaydes
A1  - Kuperjans, Isabel
T1  - Challenges and prospects of biogas from energy cane as supplement to bioethanol production
JF  - Agronomy
N2  - Innovative breeds of sugar cane yield up to 2.5 times as much organic matter as conventional breeds, resulting in a great potential for biogas production. The use of biogas production as a complementary solution to conventional and second-generation ethanol production in Brazil may increase the energy produced per hectare in the sugarcane sector. Herein, it was demonstrated that through ensiling, energy cane can be conserved for six months; the stored cane can then be fed into a continuous biogas process. This approach is necessary to achieve year-round biogas production at an industrial scale. Batch tests revealed specific biogas potentials between 400 and 600 LN/kgVS for both the ensiled and non-ensiled energy cane, and the specific biogas potential of a continuous biogas process fed with ensiled energy cane was in the same range. Peak biogas losses through ensiling of up to 27% after six months were observed. Finally, compared with second-generation ethanol production using energy cane, the results indicated that biogas production from energy cane may lead to higher energy yields per hectare, with an average energy yield of up to 162 MWh/ha. Finally, the Farm²CBG concept is introduced, showing an approach for decentralized biogas production.
Y1  - 2020
U6  - http://dx.doi.org/10.3390/agronomy10060821
SN  - 2073-4395
VL  - 10
IS  - 6
PB  - MDPI
CY  - Basel
ER  - 
TY  - CHAP
A1  - Kasper, Katharina
A1  - Schiffels, Johannes
A1  - Krafft, Simone
A1  - Kuperjans, Isabel
A1  - Elbers, Gereon
A1  - Selmer, Thorsten
T1  - Biogas Production on Demand Regulated by Butyric Acid Addition
T2  - IOP Conference Series: Earth and Environmental Science. Bd. 32
Y1  - 2016
U6  - http://dx.doi.org/10.1088/1755-1315/32/1/012009
SN  - 1755-1315
N1  - ICARET 2016, International Conference on Advances in Renewable Energy and Technologies, Putrajaya, MY, Feb 23-25, 2016
VL  - 32
SP  - 012009/1
EP  - 012009/4
ER  - 
TY  - JOUR
A1  - Cheenakula, Dheeraja
A1  - Hoffstadt, Kevin
A1  - Krafft, Simone
A1  - Reinecke, Diana
A1  - Klose, Holger
A1  - Kuperjans, Isabel
A1  - Grömping, Markus
T1  - Anaerobic digestion of algal–bacterial biomass of an Algal Turf Scrubber system
JF  - Biomass Conversion and Biorefinery
N2  - This study investigated the anaerobic digestion of an algal–bacterial biofilm grown in artificial wastewater in an Algal Turf Scrubber (ATS). The ATS system was located in a greenhouse (50°54′19ʺN, 6°24′55ʺE, Germany) and was exposed to seasonal conditions during the experiment period. The methane (CH4) potential of untreated algal–bacterial biofilm (UAB) and thermally pretreated biofilm (PAB) using different microbial inocula was determined by anaerobic batch fermentation. Methane productivity of UAB differed significantly between microbial inocula of digested wastepaper, a mixture of manure and maize silage, anaerobic sewage sludge, and percolated green waste. UAB using sewage sludge as inoculum showed the highest methane productivity. The share of methane in biogas was dependent on inoculum. Using PAB, a strong positive impact on methane productivity was identified for the digested wastepaper (116.4%) and a mixture of manure and maize silage (107.4%) inocula. By contrast, the methane yield was significantly reduced for the digested anaerobic sewage sludge (50.6%) and percolated green waste (43.5%) inocula. To further evaluate the potential of algal–bacterial biofilm for biogas production in wastewater treatment and biogas plants in a circular bioeconomy, scale-up calculations were conducted. It was found that a 0.116 km2 ATS would be required in an average municipal wastewater treatment plant which can be viewed as problematic in terms of space consumption. However, a substantial amount of energy surplus (4.7–12.5 MWh a−1) can be gained through the addition of algal–bacterial biomass to the anaerobic digester of a municipal wastewater treatment plant. Wastewater treatment and subsequent energy production through algae show dominancy over conventional technologies.
KW  - Biogas
KW  - Methane
KW  - Algal Turf Scrubber
KW  - Algal–bacterial bioflm
KW  - Circular bioeconomy
Y1  - 2022
U6  - http://dx.doi.org/10.1007/s13399-022-03236-z
SN  - 2190-6823
N1  - Corresponding author: Dheeraja Cheenakula
VL  - 13
SP  - 15 Seiten
PB  - Springer
CY  - Berlin
ER  -