The effect of precomposted sewage sludge mixture amended with biochar on the growth and reproduction of Eisenia fetida during laboratory vermicomposting

Malińska, Krystyna; Zabochnicka-Świątek, Magdalena; Cáceres, Ramón; Marfà, Oriol

doi:10.1016/j.ecoleng.2016.01.042

Cited by 100 publications

(49 citation statements)

References 42 publications

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“…Indeed, biochar addition had contradictory effects on worm reproduction. Biochar alone reduced the number of juveniles and cocoons of Eisenia to zero, contrary to what Malińska et al (2016) observed during the vermicomposting of a sewage sludge-biochar mixture. These contrasting influences of biochar on worm activity may be explained by the different biochar chemical characteristics due to specific production processes (gasification in our study and pyrolysis in the study by Malińska et al, 2016).…”

Section: 2contrasting

confidence: 40%

“…www.soil-journal.net/2/673/2016/ is supposed to have a high chemical recalcitrance against biological decomposition (McBeath and Smernik, 2009). Biochar produced at high temperatures showed very low carbon emissions during a 200-day incubation in soil (Naisse et al, 2015); thus, we can hypothesize that its mineralization can be neglected compared to OM mineralization over 21 days.…”

Section: Calculations and Statistical Analysismentioning

confidence: 99%

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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

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: 2contrasting

confidence: 40%

Section: Calculations and Statistical Analysismentioning

confidence: 99%

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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“…In studies, the vermicomposting process has removed approximately 90% of the heavy metals from a combination of sewage sludge and spent mushroom compost (Azizi, Lim, Noor, & Abdullah, ). In addition, digestate, sewage sludge, kitchen waste, domestic waste, crude spent wash, and diluted spent wash have required bulking agents, such as old paper, newsprint, cardboard, cow dung, and leaf litter to improve the structure of the wastes, enhance aeration, and absorb excess liquids (Hanc & Dreslova, ; Malinska, Zabochnicka‐Swiatek, Caceres, & Marfa, ; Sonia, Felix, & Antony, ). Precomposting has also provided improved aeration and moisture control and eliminated toxic gases from materials through physical stirring (Song et al., ).…”

Section: Properties Of Vermicompostmentioning

confidence: 99%

Vermicomposting: A sustainable tool for environmental equilibria

Singh

2017

Environmental Quality Mgmt

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Improperly managed organic waste constitutes a serious environment threat across the globe. This has led to a worldwide struggle to strike a balance between the rapid generation of such wastes and protection of the environment. With the unique advantages of lower operational and maintenance costs compared with other waste management technologies, the use of vermicomposting to manage organic wastes has been increasing rapidly in recent years. Still, some factors (e.g., characteristics of substrate composition before and after treatment) are in need of additional, specific studies so that researchers can better understand the metabolism involved in the process. Vermicomposting provides employment opportunities as it protects the environment, augmenting crop productivity when it is used as a fertilizer supplement and helping to maintain ecological balance. Thus, vermicompost plays an important role in the circular economy. This article provides an overview of the research activities that have been conducted on the use of vermicomposts to remove pollutants from the soil, in wastewater treatment, and in organic waste recycling throughout the world. Circular economic assessment has revealed that vermicomposting technology is usually feasible except in certain cases. Most other methods of waste disposal lead to soil deterioration, toxic effects, and increased pollution affecting land, air, water, and living beings, in addition to the sometimes considerable expense of their implementation. Thus, an eco‐friendly method that removes waste in one step is needed. Determining the long‐term performance and sustainable operation of vermicomposting systems still poses a challenge, however, as treatment performance is affected by design parameters, operational conditions, and environmental factors. This article summarizes the factors influencing pollutant removal through the vermicomposting process. Finally, this article highlights additional research that should be conducted on these issues to improve the performance of vermicomposting.

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“…The most popular bulking agents are cereal straw (wheat, rye), sawdust of deciduous trees, hay and maize straw. Difficult to compost wastes such as chicken manure are also combined with biochar [10], [11] and pine bark. To optimize the composting process, fuzzy logic is used to control aeration and heat generation [12], [13].…”

Section: Introductionmentioning

confidence: 99%

The influence of substrate C: N ratios on heat generation during the composting process of sewage sludge

Sołowiej¹,

Neugebauer²,

Dach³

et al. 2017

SGCE

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The volume of sewage sludge generated in Poland has increased significantly in the last two decades due to the construction of new wastewater treatment plants and the upgrading of the existing facilities. Composting is a highly effective method of managing sewage sludge. Sewage sludge has specific physicochemical properties, and it has to be combined with bulking agents to improve the porosity and the C: N ratio of the composted substrate. The aim of this study was to examine the relationships between heat generation during composting and the C: N ratio of substrates composted under identical aeration conditions. The experiment was performed on four batches of sewage sludge combined in different proportions with wheat straw and sawdust with different C: N ratios. Gas emissions (CH 4 , CO 2 , NH 3 , H 2 S) were registered during the composting process, and the amount of heat generated by the composted substrates was calculated. The experiment was conducted in a laboratory system which supported the determination of the amount of generated heat. Heat generation was correlated with the C: N ratio of the composted substrate.

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The effect of precomposted sewage sludge mixture amended with biochar on the growth and reproduction of Eisenia fetida during laboratory vermicomposting

Cited by 100 publications

References 42 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

Vermicomposting: A sustainable tool for environmental equilibria

The influence of substrate C: N ratios on heat generation during the composting process of sewage sludge

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The effect of precomposted sewage sludge mixture amended with biochar on the growth and reproduction of Eisenia fetida during laboratory vermicomposting

Cited by 100 publications

References 42 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

Vermicomposting: A sustainable tool for environmental equilibria

The influence of substrate C: N ratios on heat generation during the composting process of sewage sludge

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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