Comparison of varying operating parameters on heavy metals ecological risk during anaerobic co-digestion of chicken manure and corn stover

Yan, Yilong; Zhang, Liqiu; Feng, Li; Sun, Dezhi; Dang, Yan

doi:10.1016/j.biortech.2017.09.146

Cited by 57 publications

(15 citation statements)

References 46 publications

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“…On another side, the accumulation of heavy metals in anaerobic digestate originating from the animal manure is reported due to the routine adding of the microelements to the animal feed to improve the animal productivity. Traces of these microelements, such as iron, nickel, molybdenum, and copper, are essential for some enzymatic reactions as cofactors during the anaerobic digestion process (Chen et al 2014;Zhang et al 2015;Yan et al 2018). The presence of significant amounts of heavy metals in the digestate is a great concern due to its negative impact on soil fertility and crop productivity.…”

Section: Heavy Metalsmentioning

confidence: 99%

Cultivation of microalgae on liquid anaerobic digestate for depollution, biofuels and cosmetics: a review

et al. 2022

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Solid wastes from domestic, industrial and agricultural sectors cause acute economic and environmental problems. These issues can be partly solved by anaerobic digestion of wastes, yet this process is incomplete and generates abundant byproducts as digestate. Therefore, cultivating mixotrophic algae on anaerobic digestate appears as a promising solution for nutrient recovery, pollutant removal and biofuel production. Here we review mixotrophic algal cultivation on anaerobic waste digestate with focus on digestate types and characterization, issues of recycling digestate in agriculture, removal of contaminants, and production of biofuels such as biogas, bioethanol, biodiesel and dihydrogen. We also discuss applications in cosmetics and economical aspects. Mixotrophic algal cultivation completely removes ammonium, phosphorus, 17β-estradiol from diluted digestate, and removes 62% of zinc, 84% of manganese, 74% of cadmium and 99% of copper.

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Section: Heavy Metalsmentioning

confidence: 99%

Cultivation of microalgae on liquid anaerobic digestate for depollution, biofuels and cosmetics: a review

et al. 2022

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“…The ecological risk index (RI) has been used to evaluate the degree of heavy metal contamination based on Eqs. (1) and (2) 18,19 .…”

Section: Speciation Of Heavy Metalsmentioning

confidence: 99%

Residual and ecological risk assessment of heavy metals in fly ash from co-combustion of excess sludge and coal

Tang

Pan

Li³

et al. 2021

Sci Rep

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Co-combustion of municipal excess sludge (ES) and coal provides an alternative method for disposing ES. The present study aims to investigate the residual and ecological risk of heavy metals in fly ash from co-combustion of ES and coal. The total concentration and speciation distribution of heavy metals, characterization of SEM, EDX, XRD and leaching test were carried out to assess the fly ash in this study. The results showed that the total concentrations of Cu, Zn and Mn were higher than others in fly ash, and most heavy metals were concentrated in fine particles. For Cd, Cr and Pb, the percentages of speciation of F4 and F5 were all over 90%, suggesting the relatively lower leaching toxicity. The leaching percent of all heavy metals was lower than 5% by two diluted HNO3 solutions for fly ash. The potential ecological risks increased with the decrease of particle size of fly ash, and Cd accounted for the main fraction for ecological risk despite of lower concentration in comparison to other measured heavy metals.

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“…31 VFAs (acetate, propionate, and butyrate) were measured with highperformance liquid chromatography (HPLC, Agilent 1260, USA) as previously described. 30 Elemental composition (carbon and nitrogen) of freeze-dried CM and CS were measured using an elemental analyzer (Vario EL cube, Germany). A pH-meter was used to measure pH (HACH, USA).…”

Section: Methodsmentioning

confidence: 99%

“…Reactor operating conditions used in this study were based on settings that have been previously outlined. 30 Briey, CM was collected from the Deqingyuan Ecological Farm in Beijing, China. CS, which included leaves, stalks, and cobs, was obtained from a corneld near Zhangjiakou City, Hebei, China, and naturally air-dried to a moisture content of less than 10%.…”

Section: Reactor Operating Parametersmentioning

confidence: 99%

Identification of parameters needed for optimal anaerobic co-digestion of chicken manure and corn stover

Yan

Zhang

et al. 2019

RSC Adv.

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Comparison of varying operating parameters on heavy metals ecological risk during anaerobic co-digestion of chicken manure and corn stover

Cited by 57 publications

References 46 publications

Cultivation of microalgae on liquid anaerobic digestate for depollution, biofuels and cosmetics: a review

Cultivation of microalgae on liquid anaerobic digestate for depollution, biofuels and cosmetics: a review

Residual and ecological risk assessment of heavy metals in fly ash from co-combustion of excess sludge and coal

Identification of parameters needed for optimal anaerobic co-digestion of chicken manure and corn stover

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