The energy balance in farm scale anaerobic digestion of crop residues at 11–37°C

Bohn, Irene; Björnsson, Lovisa; Mattìasson, Bo

doi:10.1016/j.procbio.2006.07.013

Cited by 60 publications

(17 citation statements)

References 15 publications

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“…The effluent in this study was produced with an organic loading rate and water dilution rate expected to give a lactate and volatile fatty acid (VFA) concentration of less than 0.2 g dm -3 . This concentration is somewhat higher than that measured in the same reactor in other years, but is consistent with values reported by Zauner and Küntzel (1986) for biodigestion of grass/clover and by Bohn et al (2007) for biodigestion of sugar beet leaves. According to extrapolation from linear-regression equations presented by Kirchmann and Lundvall (1993), N immobilization due to application of such a biogas effluent with a VFA level of 0.2 g dm -3 should be less than 9 mg N pot -1 for the higher (150 N) fertilization level and should be soon remineralized.…”

Section: First Six-week Periodsupporting

confidence: 91%

Use efficiency of nitrogen from biodigested plant material by ryegrass

Gunnarsson

Bengtsson

Caspersen

2010

Z. Pflanzenernähr. Bodenk.

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Apparent nitrogen-use efficiency of the applied mineral N (NUE min ) in effluent from biodigested plant material (BE; C : N org ratio 14:1; mineral N-to-total N ratio 0.5:1) and a nitrate-based inorganic fertilizer (IF), both applied at two rates was investigated in a six-month pot experiment with Italian ryegrass (Lolium multiflorum Lam.). Dry-matter (DM) production was 7% lower and total amount of N in aboveground biomass was 8% lower in BE than in IF at 40 d after sowing (DAS), equal at 81 DAS, and higher in BE than in IF at 136 and 172 DAS. NUE min calculated on the basis of accumulated N in aboveground biomass of ryegrass in fertilized treatments compared to a control without N application was significantly lower in BE than in IF up to the third cut (136 DAS). Total NUE min , total N recovery, and amount of foliage DM were similar for both fertilizers at the end of the experiment. Root biomass, total DM produced including roots and stubble, the fraction of root N to total plant N, and soil mineral N at 172 DAS were higher for BE than for IF. Mineral N applied with biogas-reactor effluent was almost as effective as the nitrate-based mineral fertilizer used for comparison. Within the six-month experimental period net N mineralization, estimated at 12% of organic N in effluent, was not substantial. Hence, the organic compounds in the effluent were relatively recalcitrant.

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Section: First Six-week Periodsupporting

confidence: 91%

Use efficiency of nitrogen from biodigested plant material by ryegrass

Gunnarsson

Bengtsson

Caspersen

2010

Z. Pflanzenernähr. Bodenk.

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“…Anaerobic digestion has now become a commonly applied biological process for stabilization of sewage sludges (Arnaiz et al 2006;Aitken et al 2005). The process is more beneficial among several sludge stabilization methods by reason of it having be able to produce a net energy gain (Mao et al 2004;Bohn et al 2007) in the form of methane gas leading to cost-effectiveness (Mao et al 2004). The biodegradability of waste sludge can be improved by using thermal energy (Bougrier et al 2008), enzymes and bacteria ), ozonation (Zhang et al 2009;Dytczak et al 2007), acidification, alkaline addition (López Torres and Espinosa Lloréns 2008), high pressure homogenization (Kidak et al 2009), mechanical disintegration and ultrasound (Chu et al 2001) pre-treatments.…”

Section: Sludge Digestionmentioning

confidence: 99%

A comprehensive overview of elements in bioremediation

Juwarkar

Singh

Mudhoo

2010

Rev Environ Sci Biotechnol

303

128

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Sustainable development requires the development and promotion of environmental management and a constant search for green technologies to treat a wide range of aquatic and terrestrial habitats contaminated by increasing anthropogenic activities. Bioremediation is an increasingly popular alternative to conventional methods for treating waste compounds and media with the possibility to degrade contaminants using natural microbial activity mediated by different consortia of microbial strains. Many studies about bioremediation have been reported and the scientific literature has revealed the progressive emergence of various bioremediation techniques. In this review, we discuss the various in situ and ex situ bioremediation techniques and elaborate on the anaerobic digestion technology, phytoremediation, hyperaccumulation, composting and biosorption for their effectiveness in the biotreatment, stabilization and eventually overall remediation of contaminated strata and environments. The review ends with a note on the recent advances genetic engineering and nanotechnology have had in improving bioremediation. Case studies have also been extensively revisited to support the discussions on biosorption of heavy metals, gene probes used in molecular diagnostics, bioremediation studies of contaminants in vadose soils, bioremediation of oil contaminated soils, bioremediation of contaminants from mining sites, air sparging, slurry phase bioremediation, phytoremediation studies for pollutants and heavy metal hyperaccumulators, and vermicomposting.

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“…Psychrophilic temperatures can be used for small-scale digesters without heating. However, biogas production at psychrophil temperature is much slower compared to at higher that temperature conditions (Collins et al 2006;Bohn et al 2007;Hesselgren et al 2005). The large-scale anaerobic digesters in Europe are mostly run at mesophilic or thermophilic conditions (Table 6.3).…”

Section: Temperaturementioning

confidence: 99%

Biogas from Lignocellulosic Materials

Kabir

Forgács

Horváth

2015

Lignocellulose-Based Bioproducts

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Methane production via anaerobic digestion is a steadily growing industry in Europe and all over the world. Biomethane reduces the demand for fossil fuels, since it can be used for the production of power and heat or converted to vehicle fuel. Anaerobic digestion is a renewable energy technology; however, it can also be considered as a low-cost environmental-friendly waste management process, since it reduces the emission of greenhouse gases (GHGs), while it stabilizes the wastes. Currently, mainly the organic fraction of household waste, food waste, sewage sludge, manure, and energy crops is used for biogas production; nevertheless, there are a wide range of other organic substrates which can be utilized for biogas production. Among the organic matters, lignocellulosic materials have a great potential. Great abundance worldwide and carbohydrate-rich contents make them an attractive feedstock for biofuel production. Currently, anaerobic digestion of energy crops is widespread; however, biogas production from lignocellulosic residuals and wastes is still under investigation. This chapter focuses on anaerobic digestion of lignocellulosic materials. It explains the anaerobic digestion process and the current technologies used for crops digestion. It also summarizes the biogas potential of different lignocellulosic materials and the latest research on pretreatments to improve the methane yield. Finally, this chapter compares anaerobic digestion of lignocellulosic materials with energy production from these kinds of materials through thermochemical processes.

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The energy balance in farm scale anaerobic digestion of crop residues at 11–37°C

Cited by 60 publications

References 15 publications

Use efficiency of nitrogen from biodigested plant material by ryegrass

Use efficiency of nitrogen from biodigested plant material by ryegrass

A comprehensive overview of elements in bioremediation

Biogas from Lignocellulosic Materials

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