Tag Archives: crop residues

176-187 K. Meiramkulova, A. Bayanov, T. Ivanova, B. Havrland, J. Kára and I. Hanzlíková
Effect of different compositions on anaerobic co-digestion of cattle manure and agro-industrial by-products
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Effect of different compositions on anaerobic co-digestion of cattle manure and agro-industrial by-products

K. Meiramkulova¹, A. Bayanov¹, T. Ivanova²*, B. Havrland², J. Kára³ and I. Hanzlíková³

¹L.N. Gumilyov Eurasian National University, Department of Management and Engineering in the Field of Environmental Protection, Satpayev str., KZ010008 Astana, Kazakhstan
²Czech University of Life Sciences, Faculty of Tropical AgriSciences, Department of Sustainable Technologies, Kamýcká 129, CZ16500 Prague, Czech Republic
³Research Institute of Agricultural Engineering, Drnovská 507, CZ16101 Prague, Czech Republic
*Correspondence: ivanova@ftz.czu.cz

Abstract:

The present research is dedicated to the study of anaerobic co-digestion process of different biomass materials. Anaerobic co-digestion of digested sludge, grass silage, haylage and cattle manure was evaluated in mesophilic tank reactors in the lab-scale experiment. Twelve laboratory scale tank reactors (1.5 L) were used during the incubation period of 45 days. First triplet of reactors was fed with pure digested sludge and the other three with different mixtures having the volumetric ratios of 30/35/25/10, 40/30/20/10 and 50/25/15/10 for digested sludge/corn silage/grass haylage/cattle manure. Methane production was analyzed for all lab-scale reactors individually. The resulting specific methane production of above-mentioned batches was 336.34, 238.1 and 233.23 LSTP[CH4] kg-1[TVS], respectively. Other results such as cumulative biogas and methane yield, volumetric biogas and methane yield, volumetric biogas and methane yield per day were also assessed. These results had the highest meaning when complex substrate had no more than 30% of inoculum.

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103-110 T. Šima,, L. Nozdrovický, M. Dubeňová, K. Krištof and J. Krupička
Effect of crop residues on nitrous oxide flux in the controlled traffic farming system during the soil tillage by LEMKEN Rubin 9 disc harrow
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Effect of crop residues on nitrous oxide flux in the controlled traffic farming system during the soil tillage by LEMKEN Rubin 9 disc harrow

T. Šima¹,*, L. Nozdrovický², M. Dubeňová³, K. Krištof⁴ and J. Krupička⁵

¹,²,⁴Slovak University of Agriculture in Nitra, Faculty of Engineering,
Department of Machines and Production Systems, Tr. A. Hlinku 2, 94976 Nitra,
Slovak Republic; *Correspondence: tomasko.sima@gmail.com
³Slovak University of Agriculture in Nitra, Faculty of Engineering, Department
of Production Engineering, Tr. A. Hlinku 2, 94976 Nitra, Slovak Republic
⁵Czech University of Life Sciences Prague, Faculty of Engineering, Department
of Agricultural Machines, Kamýcká129, 16521 Prague, Czech Republic

Abstract:

Nitrous oxide (N2O) is one of the most important greenhouse gases. Agriculture, especially soil tillage and the use of fertilisers, significantly contributes to N2O emissions from soil into the atmosphere. The aim of the paper was the comparison of the amount of nitrous oxide emissions released from the soil into the atmosphere depending on crop residues in conditions of a controlled traffic farming (CTF) system. Monitoring points were selected in parts of a field with/ without crop residues and in trafficked and non-trafficked areas. There were realised three variants of the experiment: before soil tillage, right after soil tillage and seven days after soil tillage. Soil tillage was carried out by a LEMKEN Rubin 9 disc harrow with a JOHN DEERE 8230 tractor on the loamy soil after the harvest of winter wheat. The used laboratory method of measuring N2O emissions released from the soil into the atmosphere consists of collecting soil samples from the field and their subsequent analysis in the laboratory. There were used INNOVA devices which consist of a photo-acoustic field gas monitor INNOVA 1412 based on the infrared photo-acoustic detection method, a multipoint sampler INNOVA 1309 used for gas sampling transport to the gas analyser INNOVA 1412, and a notebook with operation software used for the control and setup of the analysis. There was discovered an effect of crop residues and soil compaction on the nitrous oxide flux.

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