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Techno-economic assessment of potato waste management in developing economies

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Abstract

The warming climate results in higher losses in potato production, storage and processing, especially in developing countries. Feeding, anaerobic fermentation, combustion, composting and charring of potato peels with reject potatoes were analyzed on a pilot scale. It was revealed that feeding is the most promising alternative; however, additional energy inputs for potato waste steaming are advisable to break down trypsin inhibitors that naturally decrease protein digestibility. Other results indicate that it is advisable to ferment the slurry obtained with post-harvest residues into biogas and subsequently pyrolyze dewatered fermentation residues into biochar. It is appropriate to subsequently enrich the biochar by the liquid fraction of fermentation residues via filtration. Enough indications was found that this setup provides multiple horizontal synergies as well as parallel synergies, both technical and economic, that altogether create prerequisites for sustainability of developing agriculture.

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Abbreviations

ADG:

Average daily gain

AFP:

Air-filled porosity

AL:

Albumin

BET:

Microporosity

BOD:

Biological organic demand

BR:

Basal respiration

BS:

Base saturation

BUN:

Blood urea nitrogen

CEC:

Cation exchange capacity

CH:

Cholesterol

CR:

Creatinine

HM:

Hemoglobin

HWC:

Hot water extractable carbon

HWN:

Hot water extractable nitrogen

HWP:

Hot water extractable phosphorus

L:

Labile fraction of organic matter

MEp:

Metabolizable energy for pigs

Nmin:

Mineral nitrogen

PCV:

Packed cell volume

PMN:

Potentially mineralizable nitrogen

R:

Resistant fraction of organic matter

TP:

Total porosity

TPR:

Total protein

VS:

Volatile solids

WR:

Water retention

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Correspondence to Josef Maroušek.

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Maroušek, J., Rowland, Z., Valášková, K. et al. Techno-economic assessment of potato waste management in developing economies. Clean Techn Environ Policy 22, 937–944 (2020). https://doi.org/10.1007/s10098-020-01835-w

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  • DOI: https://doi.org/10.1007/s10098-020-01835-w

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