The poultry meat industry generates about 60 million tons of waste annually. However, such waste can serve as a cheap material source for sustainable liquid fertilizers or biostimulant production. Moreover, its practical potential associated with the circular economy is evident. One of the options for waste feather reprocessing is to use a hydrolysis process, whose operating parameters vary depending on the waste material used. The better the quality of the waste feathers, the less energy is needed; moreover, a higher yield of amino acids and peptides can be achieved. These are the main operational parameters that influence the overall environmental and economic performance of the hydrolysis process. The assessment of process operational environmental aspects confirmed that the environmental impacts of hydrolysate production are highly dependent on the amount of electricity required and its sources. This fact influences the midpoint and the endpoint impacts on the observed environmental impact categories. It also minimizes the pressure associated with fossil resource scarcity and the related impact on climate change. During an economic evaluation of the process, it was found that the option of processing more fine waste, such as CGF, provided a 5% saving in energy costs related to the reduction in the cost per liter of hydrolysate of 4.5%. Finally, a case study experiment confirmed the fertilizing effect of the hydrolysate on pepper plants (biometric parameters, yield). Thus, the hydrolysate produced from the waste feathers can serve as a substitute for nitrate fertilizing, which is commonly drawn from raw fossil materials.

Circular Economy

10.3390/pr10122478

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Evaluation of Biomass Potential and its Mobilization for Energy Production in Crisis Situations

European Biomass Conference and Exhibition Proceedings (2012)

Kamila Vávrová Jan Weger J. Bubeník J. Šedivá Jaroslav Knápek

Mobilization

10.5071/20theubce2012-1bv.1.8

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Results of testing of native willows and poplars for short rotation coppice after three harvests.

Aspects of applied biology (2011)

Jan Weger Kamila Havlíčková J. Bubeník E. Booth Nigel G. Halford

Short rotation coppice

Short rotation forestry

Salicaceae

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Agroforestry systems as new strategy for bioenergy — Case example of Czech Republic

Energy Reports (2022)

Tomáš Králík Kamila Vávrová Jaroslav Knápek Jan Weger

The paper deals with the analysis of economic efficiency of innovative agroforestry systems (AFS) using coppiced tree belts (CTB), which combine the advantages of traditional alley cropping with the short rotation coppice (dense plantation of fast-growing trees for biomass — SRC) on an agricultural field. We have analyzed and compared such innovative agroforestry system (AFS-CTB) with conventional food crops production in conventional 4 crop year rotation (winter barley, winter wheat, rapeseed and corn). The minimum price of production, (based on net present value criterion), was performed to enable simultaneous assessment of annual and perennial crops over time in order to obtain also economic evaluation and comparison. Our results show that AFS-CTB generate similar income and profits as from conventional annual crops when cultivating on suitable sites and adhering to good farming principles.

Short rotation coppice

Short rotation forestry

Crop Rotation

10.1016/j.egyr.2022.02.098

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FIRSt RESUltS OF EValUatION OF MIxED POPlaR aND wIllOw SHORt ROtatION COPPICE

Jan Weger J. Bubeník

The article presents first results of evaluation of experimental short rotation coppice, which was established as row mixture of selected poplar and willow clones in locality Dalovice in 1999. The goal of evaluation is to assess yield and stability of mixed short rotation coppice. Therefore experimental harvests of above ground biomass and measurements of quantitative characteristics (height, stem diameter and number) of trees were performed between 2005 and 2009. Collected data were statistically evaluated using analysis of variance (aNOV

Short rotation coppice

Short rotation forestry

Salicaceae

Variance components

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