Sustainable Production of Sweet Sorghum as a Bioenergy Crop Using Biosolids Taking into Account Greenhouse Gas Emissions

Głąb, Lilianna; Sowiński, Józef

doi:10.3390/su11113033

Cited by 13 publications

(8 citation statements)

References 35 publications

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“…Glab and Sowinski focused on evaluating how sewage sludge and digestate application affect the Carbon footprint of sorghum production, compared with conventional fertilization management. The study concluded that the replacement of synthetic N fertilizers by alternative nutrient sources, such as sewage sludge and digestate resulted in lower GHG emissions and are a promising strategy for low carbon in agriculture [48].…”

Section: Discussionmentioning

confidence: 99%

Industrial Symbiosis through the Use of Biosolids as Fertilizer in Romanian Agriculture

Cioca

Ciomoş²,

Șeitoar³

et al. 2021

Recycling

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Biosolids’ use in agriculture is an example of industrial symbiosis. The application of biosolids (BS) in agriculture is considered one of the most sustainable sewage sludge (SS) management options, but the quality of biosolids has to meet certain requirements regarding the characteristics of the sludge, those of the land and of the type of crop. Web of Science database has been used to search for the relevant literature. The review of studies undertaken in order to determine the economic effects of the use of biosolids in agriculture shows, in the majority, an increase in crop yield and the reduction in costs, due to the reduction in the requirements for the application of chemical or synthetic fertilizers. If the entire sewage sludge production in Romania for 2019 had been used as fertilizer, the estimated cost reduction for farmers would have been almost 3 million Euros—considering the 230.59 thousand tons of dry matter produced in 2019. The estimated savings for 2019 of the sewage and water utilities, if the sewage sludge had been used in agriculture instead of depositing it at the landfill, would have been about 3.9 million Euros. However, the limits of the symbiosis are due to the size of the farms, the type of plants cultivated, pH, slope inclination, heavy metal content and social acceptance. It is impossible to use all the sewage sludge in agriculture, but these figures are a good estimation of the economic effects.

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Section: Discussionmentioning

confidence: 99%

Industrial Symbiosis through the Use of Biosolids as Fertilizer in Romanian Agriculture

Cioca

Ciomoş²,

Șeitoar³

et al. 2021

Recycling

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“…As an alternative nutrient source, ADD contributes to the mitigation of climate change through the reduction of greenhouse gas emissions, both directly (Hao et al, 2016) and indirectly through the production of nitrogenous mineral fertilizers. A system integrating production of biogas and electricity from renewable sources as agro-energy crops (silage sorghum) together with animal husbandry waste (manure) with production of this silage on marginal land using digestate from AD process as soil amendment leading to approaching low carbon agriculture and circular economy by recycling nutrients (Głab et al, 2019).…”

Section: Sorghum Biogas Yieldmentioning

confidence: 99%

Effect of digestate from anaerobic digestion on Sorghum bicolor L. production and circular economy

Popović

Rakašćan

Drazic

et al. 2021

Not Bot Horti Agrobo

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The aim of the research was determination the efficiency of application 50 t ha-1 digestate from the process of anaerobic digestion on the productivity of sorghum (Sorghum bicolor L.) on moderately degraded (calcic gleysol) and fertile (chernozem) agricultural land, in southern Banat, Republic of Serbia. In the field experiment during three years digestate amendment led to an increase in the number of leaves by 28.56% and plant height by 5.34%, which led to an increase in yield by 3.40%. The maximum yield was 2018 (41.74 DM t ha-1) on chernozem. The yield of sorghum was lower on calcic gleysol compared to chernozem by 5.43% and was in positive, medium and very significant dependence on precipitation (0.61) and in positive significant correlation with digestate (0.53) and plant height (0.59). Biogas yield reach 157.05 Nm3 t-1 (9582 Nm3 ha-1) on chernozem with digestate. Digestate had a statistically significant positive effect on all tested characteristics of sorghum as well as biogas yield during all three experimental years. The use of digestate as a by-product in the process of producing biogas based on silage of sorghum, allows the substitution of mineral fertilizers and remediation of damaged soil, which contributes to sustainability from the bio-economic and environmental aspects.

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“…The materials for the study were forages of different sorghum varieties from an experimental plot in Pawlowice (51 • [20]. The plants reach heights of 250-350 cm.…”

Section: Plant Materialsmentioning

confidence: 99%

Changes in the In Vitro Ruminal Fermentation of Diets for Dairy Cows Based on Selected Sorghum Cultivars Compared to Maize, Rye and Grass Silage

et al. 2021

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An in vitro experiment was conducted to determine the impact of silage produced from selected varieties of sorghum on the microbial fermentation profile of cows’ ruminal fluid. To determine the main microbial fermentation products, ruminal fluid samples were obtained from Polish Holstein–Friesian cows. Serum bottles were filled with 80 mL of ruminal samples, and 1 g of one of the following substrates was added: corn silage (CS), grass silage (GS), rye silage (RS), sorghum silage (sweet) (SS1), sorghum silage (grain) (SS2) or sorghum silage (dual-purpose) (SS3). The serum bottles were flushed with CO2 and fermented for 8 and 24 h at 39 °C. After incubation, the obtained gas and rumen fluid were then analysed to determine the methane and volatile fatty acid (VFA) contents using gas chromatography. The use of sorghum silage (SS) resulted in a decrease in the total concentration VFA concentration in the ruminal fluid compared with the use of other silages, especially GS. Moreover, the ruminal fluid contained a lower molar proportion of propionic and butyric acids when SS was used compared with CS. The butyric acid proportion was higher in SS samples than in RS samples. The differences in chemical composition between sorghum varieties did not influence the rumen VFA concentration or profile. A decrease in gas production, but without effects on methanogenesis, was observed when SS was used compared with GS and CS. The analysis demonstrates the physiological processes of fermentation in the rumen, as evidenced by the products of microbial fermentation. The main advantage is that the addition of SS, irrespective of the plant variety, reduced fermentation gas production in the ruminal fluid compared with CS. The silage of the analyzed sorghum varieties may be used in the diets of dairy cows as a substitute for corn and grass silages.

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Sustainable Production of Sweet Sorghum as a Bioenergy Crop Using Biosolids Taking into Account Greenhouse Gas Emissions

Cited by 13 publications

References 35 publications

Industrial Symbiosis through the Use of Biosolids as Fertilizer in Romanian Agriculture

Industrial Symbiosis through the Use of Biosolids as Fertilizer in Romanian Agriculture

Effect of digestate from anaerobic digestion on Sorghum bicolor L. production and circular economy

Changes in the In Vitro Ruminal Fermentation of Diets for Dairy Cows Based on Selected Sorghum Cultivars Compared to Maize, Rye and Grass Silage

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