Effect of the Addition of Biochar and Coffee Grounds on the Biological Properties and Ecotoxicity of Composts

Kopeć, Michał; Baran, Agnieszka; Mierzwa–Hersztek, Monika; Gondek, Krzysztof; Chmiel, Maria J.

doi:10.1007/s12649-017-9916-y

Cited by 26 publications

(23 citation statements)

References 22 publications

(34 reference statements)

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“…The addition of biochar to compost with sewage sludge decreased the abundance of indicative microorganisms E. coli and Salmonella ssp. and increased the total number of bacteria and fungi [41]. The physico-chemical characteristics of biochar and zeolite may explain the observed changes in the bacterial and fungal communities.…”

Section: Discussionmentioning

confidence: 89%

Bacterial and Fungal Community Dynamics and Shaping Factors During Agricultural Waste Composting with Zeolite and Biochar Addition

Ren

Luo

et al. 2020

Sustainability

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Bacterial and fungal communities play significant roles in waste biodegradation and nutrient reservation during composting. Biochar and zeolite were widely reported to directly or indirectly promote microbial growth. Therefore, the effects of zeolite and biochar on the abundance and structure of bacterial and fungal communities and their shaping factors during the composting of agricultural waste were studied. Four treatments were carried out as follows: Run A as the control without any addition, Run B with zeolite (5%), Run C with biochar (5%), and Run D with zeolite (5%) and biochar (5%), respectively. The bacterial and fungal community structures were detected by high-throughput sequencing. Redundancy analysis was used for determining the relationship between community structure and physico-chemical parameters. The results indicated that the addition of biochar and zeolite changed the physico-chemical parameters (e.g., pile temperature, pH, total organic matter, ammonium, nitrate, and water-soluble carbon) during the composting process. Zeolite and biochar significantly changed the structure and diversity of bacterial and fungal populations. Moreover, the bacterial community rather than the fungal community was sensitive to the biochar and zeolite addition during the composting process. Community phylogenetic characteristics showed that Nocardiopsaceae, Bacillaceae, Leuconostocaceae, Phyllobacteriaceae, and Xanthomonadaceae were the predominant bacterial species at the family-level. Chaetomiaceae and Trichocomaceae were the two most dominant fungal species. The pH, total organic matter, and nitrate were the most important factors affecting the bacterial and fungal population changes during the composting process.

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Section: Discussionmentioning

confidence: 89%

Bacterial and Fungal Community Dynamics and Shaping Factors During Agricultural Waste Composting with Zeolite and Biochar Addition

Ren

Luo

et al. 2020

Sustainability

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“…All these parameters were determined in triplicate to ensure the preciseness of the measurements. [28]. Moreover, to ensure the high quality of the end product, heavy metals content was measured in an external lab, to be then compared to the German quality requirements for compost, as used in gardening and agriculture.…”

Section: Sampling and Analysismentioning

confidence: 99%

Optimization of Food Waste and Biochar In-Vessel Co-Composting

et al. 2020

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As bulking agents (BA) affect the composting process, this work examined the impact of combinations of different organic components in order to obtain an efficient co-substrate for food waste (FW) in-vessel composting. To boost the occurrence of microorganisms inhabiting the compost, mature compost was firstly coupled with wheat straw, added to FW, and considered as a control (BC0). Then, two trials (BC10, BC20) including 10% and 20% of biochar were monitored. The results indicated that the temperature of the amended bioreactors was notably increased compared to the unamended one. Thermophilic temperatures were achieved at 14, 34, and 78 h after the experimental setup for BC20, BC10, and BC0, which lasted for 14, 17, and 12 days, respectively. When it came to an assessment of maturity and stability, the quality of the compost was evaluated against several indicators and compared with the compost quality standards of the UK, France, Canada, the USA, Poland, and Germany. BC10 illustrated a high-quality product in relation to the heavy metal concentration, a C:N ratio which reached 14.97, an AT4 which was lower than 6 (4.36 mg O2/g TS), and a nitrification index of 2.61 (<3). Consequently, the addition of 10% of biochar as a co-substrate showed an improvement of the process evolution and the characteristics of the biofertilizer produced.

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“…Based on the AT 4 value it can be stated that the 12 weeks of maturation reduced the value of the AT 4 parameter to a level that results in the sufficient stabilization of the material [10,40]. Some authors have found that the AT 4 value can be much higher for SSC than for composts from other wastes [12,25]. In a current study an interesting effect was a high level (44.6 Nl kg −1 DM) of GS 21 for the sample after 2 weeks of maturation (No.…”

Section: Stability Degree Tests and Gas Production Potentialmentioning

confidence: 99%

“…Stabilized waste should be characterized by a low value of the AT 4 parameter, below 10 mg O 2 g −1 DM [10]. Many tests are used to assess the stability of waste compost [10,12,[25][26][27][28]. In recent years, a number of automated respirometers have become available on the market, each with a proven 1 3 capability to measure O 2 consumption.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of Composition Changes, Stability Degree and the Potential of Biogas Formation of Sewage Sludge Composts During Maturation Process

Bożym

Siemiątkowski

2019

Waste Biomass Valor

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The aim of this study was to assess the degree of stabilization of composted sewage sludge (SSC) during maturation using tests in aerobic and anaerobic conditions, determining the potential for biogas formation and its composition, as well as changes of mobile and bioavailable forms of metals in SSC after treatment. The samples were taken in the second phase of composting, during the maturation process. The biological stability of SSC samples was determined by detecting an incubation test (GS 21 ) and respiration index (AT 4 ). The potential for biogas formation and composition changes of SSC during maturation were analyzed. It was found that the chemical composition of the tested samples depended on the degree of their maturity. It was found that the both tested methods (AT 4 , GS 21 ) of assessing the stability of waste are sufficient. Treatment under anaerobic conditions did not significantly change the composition of the samples, with the exception of total organic carbon (TOC). A high percentage of methane in biogas for samples at the beginning of the maturation process indicates a high content of biodegradable organic matter in SSC. In addition, the decrease of mobile and bioavailable forms of heavy metals percentage, during the SSC maturation, was found. In order to confirm the results of current study, a long-term field studies should be carried out on the effects of SSCs tested on soils and plants. Graphic AbstractKeywords Sewage sludge compost (SSC) · Maturity · Incubation test (GS 21 ) · Respiration index (AT 4 ) · Biogas potential · Heavy metals * Marta Bożym

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Effect of the Addition of Biochar and Coffee Grounds on the Biological Properties and Ecotoxicity of Composts

Cited by 26 publications

References 22 publications

Bacterial and Fungal Community Dynamics and Shaping Factors During Agricultural Waste Composting with Zeolite and Biochar Addition

Bacterial and Fungal Community Dynamics and Shaping Factors During Agricultural Waste Composting with Zeolite and Biochar Addition

Optimization of Food Waste and Biochar In-Vessel Co-Composting

Assessment of Composition Changes, Stability Degree and the Potential of Biogas Formation of Sewage Sludge Composts During Maturation Process

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