Producing organic amendments: Physicochemical changes in biowaste used in anaerobic digestion, composting, and fermentation

Chavez-Rico, Vania Scarlet; Bodelier, Paul L. E.; Eekert, M.H.A. van; Sechi, Valentina; Veeken, A.H.M.; Buisman, Cees N.J.

doi:10.1016/j.wasman.2022.06.005

Cited by 21 publications

(15 citation statements)

References 26 publications

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“…Soil C pools and nutrient assessment: Total C and N were determined on an Elemental Analyser (Thermo Scientific™ FlashSmart™, Courtaboeuf, France) while other elements (P, Na, K, Ca, and Mg) were analysed using inductively coupled plasma optical emission spectrometry (ICP-OES; Optima 5300 DV, Perkin Elmer) (Chavez-Rico et al, 2022). A cold-water and hot-water soil extraction (at 20 • C and 80 • C, correspondingly) were used to assess immediately-and short-term available C, N, and P correspondingly following Ghani et al (2003).…”

Section: Methodsmentioning

confidence: 99%

“…To allow an independent comparison between OAs, the same model substrate was used to produce compost, digestate and lactic acid fermented product. This initial substrate resembled biowaste composed of 20% meadow hay and 80% dog food which was used as model-domestic-food waste (Baker et al, 1999;Chavez-Rico et al, 2022;Fernandez-Bayo et al, 2018;Nakasaki et al, 1998;Schloss et al, 2000). Additionally, these OAs were produced in similar reactors under laboratory conditions.…”

Section: Preparation Of Oas and Characterisationmentioning

confidence: 99%

“…Several indicators of quality, specific for each technology, were used. All the details about the design and preparation of the model-initial substrate, the OAs production and characterisation and mass balances are described in Chavez-Rico et al (2022). The solid-fraction of digestate was separated from the liquid one by centrifugation for 20 min at 10,000 rpm because we wanted to assess its properties as an organic soil improver which by definition should have ≥20% dry weight (EU, 2019).…”

Section: Preparation Of Oas and Characterisationmentioning

confidence: 99%

“…Pre-treatment technologies to produce OAs (i.e., composting, anaerobic digestion, and fermentation) modify the organic matter chemistry, elemental composition, and nutrient availability of organic-raw materials in different ways. Technologies that use reducing conditions (i.e., lactic acid fermentation and anaerobic digestion) can increase the availability of easily degradable C and can be more C and N rich than compost (Chavez-Rico et al, 2022), showing that under reducing conditions, characteristics that are related to high-quality OAs can be enhanced. A high-quality OA is defined here as a substrate that can simultaneously increase carbon and nutrient content and promote aggregate formation.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of pre-treatment processes of organic residues on soil aggregates

Chavez-Rico

Bergh

Bodelier

et al. 2023

Environmental Technology & Innovation

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Section: Methodsmentioning

confidence: 99%

Section: Preparation Of Oas and Characterisationmentioning

confidence: 99%

Section: Preparation Of Oas and Characterisationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of pre-treatment processes of organic residues on soil aggregates

Chavez-Rico

Bergh

Bodelier

et al. 2023

Environmental Technology & Innovation

Self Cite

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“…Composting technologies have progressed parallel to a growing interest in organic waste recycling and reducing its environmental impact (Zheng et al ., 2020; de Nobile et al ., 2021; Chavez-Rico et al ., 2022). Nonetheless, limitations in logistics, organization and economic viability still affect the reuse of those materials in agriculture (Westerman and Bicudo, 2005).…”

Section: Introductionmentioning

confidence: 99%

Locally available compost application in organic farms: 2-year effect on biological soil properties

Assirelli¹,

Fornasier²,

Caputo

et al. 2023

Renew. Agric. Food Syst.

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Composting technologies have progressed parallel to the growing interest in recycling organic waste over recent decades, whilst in-field compost application requires technical improvement and more experience in order to optimize their effect according to the agro-environment and the type of crop which follow their incorporation into the soil. In response to compost application, biological soil features were assessed in field by adopting precision agricultural machinery and by limiting soil incorporation to a depth of 15 cm. A 2-year trial was carried out on two sites in the East Po valley (Northern Italy), an agricultural district which, in 2000, was classified as being on the verge of desertification, and where efforts to counteract soil organic matter decline have been underway for some decades. A green-waste compost produced in accordance with current national directives was applied in autumn 2019 and 2020 to two organic fields using precision farming machinery for compost spreading and conventional harrows for incorporation. Fields were divided into two large plots to compare the effect of compost treatment to an untreated control and were managed according to organic farming practices. Seven months after application, microbial biomass, assessed in terms of DNA, and 17 enzymatic activities were estimated by sampling root-explored soil at the vegetative stage of different seed crops for organic horticulture. A significant overall increase of biological soil activity was detected after the second application. The qualitative response varied slightly between the two sites: a higher impact of microbial biomass was observed in the site that was poorer in soil organic matter; whilst in the other, an increase of phosphatase activities contributed more to the general increase of biological activity. Findings show that, in those agricultural soils, an agronomic advantage from compost can be obtained only after repeated applications; furthermore, precision farming technologies facilitate compost application even in small, specialized farms such as those which hosted this trial.

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Functional biochar as sustainable precursors to boost the anaerobic digestion of waste activated sludge from a circular economy perspective: a review

Chen,

Zeng,

Yang

et al. 2024

Biochar

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Waste activated sludge (WAS) is attracting attention for its energy and resource potential. Anaerobic digestion (AD) can be used to efficiently recover energy resources and stabilize pollutants in WAS, with biochar emerging as an ideal additive to boost this process. However, the low abundance of surface functional groups and small pore structure of raw biochar may limit its performance in the AD of WAS. These limitations can be overcome by using functional biochar. In this review, the preparation and modification methods for functional biochar and its role in the AD of WAS are systematically summarized and discussed. Notably, the role of functional biochar in electron transfer, buffering effects, microbial immobilization, alleviation of inhibitory effects, and functional microbial modulation are analyzed. Additionally, the impacts of biochar on digestate utilization, pollutant removal, and carbon fixation are discussed. Special attention is given to functional biochar for its ability to promote circular economy and carbon neutrality. Finally, future perspectives on the use of functional biochar in the AD of WAS are presented. The aim of this review is to provide insights into the application of functional biochar in the AD of WAS from the perspective of performance improvement, resource utilization, and circular economy. Graphical Abstract

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Producing organic amendments: Physicochemical changes in biowaste used in anaerobic digestion, composting, and fermentation

Cited by 21 publications

References 26 publications

Effect of pre-treatment processes of organic residues on soil aggregates

Effect of pre-treatment processes of organic residues on soil aggregates

Locally available compost application in organic farms: 2-year effect on biological soil properties

Functional biochar as sustainable precursors to boost the anaerobic digestion of waste activated sludge from a circular economy perspective: a review

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