Mesophilic anaerobic co-digestion of cow manure and biogas crops in full scale German biogas plants: A model for calculating the effect of hydraulic retention time and VS crop proportion in the mixture on methane yield from digester and from digestate storage at different temperatures

Anaerobic Co-digestion of Pig Manure with Dried Maize Straw

“…Giuliano et al (2013) found that substitution of 25% energy crop with 25% agro-waste in co-digestion of PM with energy crops achieved the greatest methane production of 0.54 m 3 /kg VS. In addition to these studies, Linke et al (2013) built a model to calculate the maximum methane production that could be achieved at different hydraulic retention time (HRT) by optimizing crop proportion in the co-digestion of cow manure with crops. For instance, it was found that the maximum methane yield of 388 L/kg at HRT of 60 days could be achieved only if choosing the proper crop proportion.…”

A dynamic model for calculating methane emissions from digestate based on co-digestion of animal manure and biogas crops in full scale German biogas plants

“…Because methane formation within the monitoring program was not referred to volatile solid (VS) of the input feed a conversion of data was performed (cf. Linke et al, 2013). This is necessary in order to provide comparability of methane yield from co-fermentation mixtures of manure and biogas crops.…”

“…In Linke et al (2013) a model for computing methane yield in a CSTR as well as methane yield in the storage tank as a function of hydraulic retention time and crop proportion in the input material has been introduced. However, in the developed model steady state is assumed for the whole biogas plant.…”

“…However, the actual storage time is not constant throughout a year, because the removal rate of the digestate from the storage tank is nonconstant. Based on the model for calculating the effect of hydraulic retention time and VS crop proportion in any mixture with animal slurry on methane yield from digester and from digestate storage (Linke et al, 2013) the aim of this study is the prediction of methane emissions from storage tanks under conditions simulating practical use, i.e., realistic temperatures of the digestate in the storage tank and common removal rates of the digestate.…”

Integrated manure management to reduce environmental impact: II. Environmental impact assessment of strategies

“…Monogastric animal species are known to excrete more labile carbon, that increases CH 4 production from manure, compared to ruminants (Jensen and Sommer, 2013). CH 4 emission factors can be estimated in more detail by using the maximum methane production potential (B0), and methane conversion factor (MCF) of specific manure products (IPCC, 2006b;Linke et al, 2013). Here, we addressed the uncertainty in CH 4 emission factors by including a ±50% uncertainty range.…”