Co-composting of poultry manure mixtures amended with biochar – The effect of biochar on temperature and C-CO2 emission

Czekała, Wojciech; Malińska, Krystyna; Cáceres, Ramón; Janczak, Damian; Dach, Jacek; Lewicki, Andrzej

doi:10.1016/j.biortech.2015.11.019

Cited by 215 publications

(121 citation statements)

References 24 publications

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“…Thus, our initial hypothesis stating that OMbiochar interactions might be enhanced by worm activity similarly to OM-clay interactions is not supported by results. However, this is in line with other studies showing that the presence of biochar accelerates the composting process (Sánchez-García et al, 2015;Czekala et al, 2016). Three processes might explain why the worms drastically modify the complex interactions between clay, biochar and OM: (1) the microbial colonization of biochar might be enhanced in the worm gut decreasing their long-term resistance to biodegradation; (2) biochars might enhance worm activity, as suggested by Augustenborg et al (2012) to explain the increase in CO 2 emissions when biochar was added to soil in the presence of worms; and (3) during composting with a biochar-clay mixture, the worms might increase the contact between clay and biochar in their gut, leading to the partial saturation of clay surfaces with carbon compounds originating from biochar and thus to a reduction in the available surface area.…”

Section: 2supporting

confidence: 77%

The effects of worms, clay and biochar on CO<sub>2</sub> emissions during production and soil application of co-composts

Barthod

Rumpel

Paradelo

et al. 2016

SOIL

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Abstract. In this study we evaluated CO 2 emissions during composting of green wastes with clay and/or biochar in the presence and absence of worms (species of the genus Eisenia), as well as the effect of those amendments on carbon mineralization after application to soil. We added two different doses of clay, biochar or their mixture to pre-composted green wastes and monitored carbon mineralization over 21 days in the absence or presence of worms. The resulting co-composts and vermicomposts were then added to a loamy Cambisol and the CO 2 emissions were monitored over 30 days in a laboratory incubation. Our results indicated that the addition of clay or clay/biochar mixture reduced carbon mineralization during co-composting without worms by up to 44 %. In the presence of worms, CO 2 emissions during composting increased for all treatments except for the low clay dose. The effect of the amendments on carbon mineralization after addition to soil was small in the short term. Overall, composts increased OM mineralization, whereas vermicomposts had no effect. The presence of biochar reduced OM mineralization in soil with respect to compost and vermicompost without additives, whereas clay reduced mineralization only in the composts. Our study indicates a significant role of the conditions of composting on mineralization in soil. Therefore, the production of a low CO 2 emission amendment requires optimization of feedstocks, co-composting agents and worm species.

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Section: 2supporting

confidence: 77%

The effects of worms, clay and biochar on CO<sub>2</sub> emissions during production and soil application of co-composts

Barthod

Rumpel

Paradelo

et al. 2016

SOIL

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“…1) (Czekała et al, 2016). After many experiments, it was discovered that the minimum chamber volume needs to be greater than 120 dm 3 .…”

Section: Methodsmentioning

confidence: 99%

Changes in Acrylamide Monomer Content During Composting of Dairy Processing Sludge

Mroczek-Krzyzelewska¹

2017

Appl Ecol Env Res

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Abstract. This paper focused on the results of an experiment involving sewage sludge drawn from a typical dairy processing plant after application of polyacrylamide (PAM) flocculant in an approximate dosage of 3.5 kg Mg -1 dry matter for dewatering and subsequently taken for aerobic fermentation in a lab-scale bioreactor with a capacity of 120 dm 3 within 31 days. Since it can not be ruled out that such sewage sludge will be used as a good soil fertilizer for edible plants, e.g. vegetables, the concentration of neurotoxic and carcinogenic residual acrylamide monomer (AMD) was monitored throughout the composting process. Analysis of AMD was conducted using the HPLC method for compost samples taken after the 1 st day of the experiment, on the 10 th day and on the last 31 st day of the experiment. The results obtained from the composting process with measurement of temperature and air flow intensity indicate that aerobic composting resulted in a significant reduction of the AMD content in the compost, up to 23% of the initial value. It appears to be the case that intensive processes of biochemical degradation during aerobic fermentation of sludge from the dairy processing plant significantly reduces the threat of residual monomers being released into the environment from a polyacrylamide applied as a chemical sludge conditioner.

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“…The experimental design was described in detail by [13]. A diagram of the compost bioreactor is presented in Fig.…”

Section: Methodsmentioning

confidence: 99%

The influence of the C: N ratio on the composting rate

Neugebauer¹,

Sołowiej²,

Piechocki³

et al. 2017

SGCE

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Sewage sludge was composted with the addition of straw and sawdust to modify the C: N ratio of dry matter. The experiment was conducted in closed and insulated bioreactors, at four C: N ratios: 9.2, 12.1, 17.0 and 26.4. The following parameters were measured during the composting process: temperature inside the bioreactor, aeration rate, ammonia and carbon dioxide emissions from the bioreactor. The composting process lasted 25 days. Temperature was measured after the end of composting, up to day 33 of the experiment. The measured parameters were used to calculate accumulated temperature and composting rate. The results indicate that the C:N ratio significantly influenced the temperature inside the bioreactor (the higher the C:N ratio, the higher the temperature and composting rate) as well as cumulative emissions of CO 2 , H 2 S and NH 3 . The lowest cumulative gas emissions were noted in bioreactor R2 where the C: N ratio was very low at 12. Our results suggest that sewage sludge can be effectively composted with the addition of only 40% of straw / sawdust as bulking agents which increase substrate porosity and improve the C: N ratio. The substrate was effectively sanitized in all four bioreactors.

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Co-composting of poultry manure mixtures amended with biochar – The effect of biochar on temperature and C-CO2 emission

Cited by 215 publications

References 24 publications

The effects of worms, clay and biochar on CO<sub>2</sub> emissions during production and soil application of co-composts

The effects of worms, clay and biochar on CO<sub>2</sub> emissions during production and soil application of co-composts

Changes in Acrylamide Monomer Content During Composting of Dairy Processing Sludge

The influence of the C: N ratio on the composting rate

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Co-composting of poultry manure mixtures amended with biochar – The effect of biochar on temperature and C-CO2 emission

Cited by 215 publications

References 24 publications

The effects of worms, clay and biochar on CO&lt;sub&gt;2&lt;/sub&gt; emissions during production and soil application of co-composts

The effects of worms, clay and biochar on CO&lt;sub&gt;2&lt;/sub&gt; emissions during production and soil application of co-composts

Changes in Acrylamide Monomer Content During Composting of Dairy Processing Sludge

The influence of the C: N ratio on the composting rate

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Product

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The effects of worms, clay and biochar on CO<sub>2</sub> emissions during production and soil application of co-composts

The effects of worms, clay and biochar on CO<sub>2</sub> emissions during production and soil application of co-composts