Optimized production of biomethane as an energy vector from low-solids biomass using novel magnetic biofilm carriers

Ramm, Patrice; Terboven, Christiane; Neitmann, Elisabeth; Sohling, Ulrich; Mumme, Jan; Herrmann, Christiane

doi:10.1016/j.apenergy.2019.113389

Cited by 9 publications

(3 citation statements)

References 24 publications

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“…The development of biological biosensors and advanced techniques of microbial detection allow us to identify the degree of concentration of microorganisms on a biological membrane, which is of key importance to the formation of the biofilm. 143 Ramm et al 144 analyzed novel magnetic foam glass particles, able to act as biofilm carriers and to retain active microbial biomass used in the production of biomethane. Magnetic foam glass particles evidently stabilized the methane production process, mostly owing to the beneficial effect on methanogenic microorganisms, which accounted for 49% of the population settled on magnetic carriers.…”

Section: Immobilization Of Biofilms/biofiltersmentioning

confidence: 99%

Intensification of biogas production using various technologies: A review

et al. 2020

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Summary Anaerobic digestion (AD) is an organic matter conversion technology which offers a wide range of options for production of biogas from organic biomass, providing an excellent opportunity to convert abundant bioresources into safe, eco‐friendly, renewable energy. Important factors in the process of AD are the biodiversity of microorganisms, chemical load of oxygen demand, and content of water and total solids. A challenge for the future is to find technologies that will maximally enhance biogas production and to find pathways for biogas to supersede well‐established technologies and practices in the contemporary heavily fossil fuel‐based energy system. Current studies on technologies of biogas production indicate a number of possibilities of using appropriate biological and physicochemical additives, like added enzymes or fruit pomace, as well as immobilizing microorganisms on biofilters. Anaerobic biorefinery is an emerging concept that generates not only bioenergy but also high‐value biochemical products from the same feedstock. This study is a review of articles describing the intensification of biogas production by using various technologies.

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Section: Immobilization Of Biofilms/biofiltersmentioning

confidence: 99%

Intensification of biogas production using various technologies: A review

et al. 2020

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“…Previous studies have shown that the structure and performance of the anaerobic bioreactor and the pretreatment of raw materials are important factors in determining the effect of anaerobic fermentation [22][23][24][25][26]. The selection of biofilm carrier materials is necessary to maintain microbial biomass [27]. In previous work, a mobile bed biofilm reactor was used with a sponge as the carrier to simulate the process using a computational fluid dynamics model [28].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Mesophilic Anaerobic Digestion of Waste-Activated Sludge through Heat Pretreatment and Kinetic Modeling

et al. 2023

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Sewage sludge is a useful raw material for the production of renewable energy due to its stable annual output. In this study, the enhancement of mesophilic anaerobic digestion of sewage sludge through heat pretreatment at 95 °C for 30 min was tested in an anaerobic moving bed biofilm reactor (hAMBBR). The sludge retention time was set at 20, 15, 10, and 5 days during 300 days of operation and compared to a traditional anaerobic continuous stirred tank reactor (AnCSTR) without pretreatment. Results of this research indicate that the digestion ratio of volatile soluble solids in the hAMBBR process could be improved by 50%, and the average conversion ratio of methane could be increased by 45%. When the sludge retention time (SRT) was shortened to 5 days, the methane production approached twice that of the contrast reactor. The expanded anaerobic digestion model, including activated sludge models, was utilized for operation simulation. The effect of sludge retention time (SRT) shortening on volatile suspended solids (VSS) digestibility and methane production was well reproduced with simulations. The research conclusion reveals the impact of pretreatment and reactor types on anaerobic digestion and provides the scientific basis for improving methane production and process efficiency in anaerobic digestion.

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“…Most BPs use manure [5], sewage sludge [6], slaughterhouse waste [7], meat and bone meal [8], ensilaged biomass such as maize silage [9] and sugar beet silage [10], potato pulp [11], and confectionery press cake [12] as substrates for AD. These substrates are processed into nutrient-rich digestate.…”

Section: Introductionmentioning

confidence: 99%

Digestate from Agricultural Biogas Plants as a Reservoir of Antimicrobials and Antibiotic Resistance Genes—Implications for the Environment

Wolak

Bajkacz

Harnisz

et al. 2023

IJERPH

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Antimicrobials and antibiotic resistance genes (ARGs) in substrates processed during anaerobic digestion in agricultural biogas plants (BPs) can reach the digestate (D), which is used as fertilizer. Antimicrobials and ARGs can be transferred to agricultural land, which increases their concentrations in the environment. The concentrations of 13 antibiotics in digestate samples from biogas plants (BPs) were investigated in this study. The abundance of ARGs encoding resistance to beta-lactams, tetracyclines, sulfonamides, fluoroquinolones, macrolide-lincosamide-streptogramin antibiotics, and the integrase genes were determined in the analyzed samples. The presence of cadmium, lead, nickel, chromium, zinc, and mercury was also examined. Antimicrobials were not eliminated during anaerobic digestion. Their concentrations differed in digestates obtained from different substrates and in liquid and solid fractions (ranging from 62.8 ng/g clarithromycin in the solid fraction of sewage sludge digestate to 1555.9 ng/L doxycycline in the liquid fraction of cattle manure digestate). Digestates obtained from plant-based substrates were characterized by high concentrations of ARGs (ranging from 5.73 × 102 copies/gDcfxA to 2.98 × 109 copies/gDsul1). The samples also contained mercury (0.5 mg/kg dry mass (dm)) and zinc (830 mg/kg dm). The results confirmed that digestate is a reservoir of ARGs (5.73 × 102 to 8.89 × 1010 copies/gD) and heavy metals (HMs). In addition, high concentrations of integrase genes (105 to 107 copies/gD) in the samples indicate that mobile genetic elements may be involved in the spread of antibiotic resistance. The study suggested that the risk of soil contamination with antibiotics, HMs, and ARGs is high in farms where digestate is used as fertilizer.

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Optimized production of biomethane as an energy vector from low-solids biomass using novel magnetic biofilm carriers

Cited by 9 publications

References 24 publications

Intensification of biogas production using various technologies: A review

Intensification of biogas production using various technologies: A review

Enhancing Mesophilic Anaerobic Digestion of Waste-Activated Sludge through Heat Pretreatment and Kinetic Modeling

Digestate from Agricultural Biogas Plants as a Reservoir of Antimicrobials and Antibiotic Resistance Genes—Implications for the Environment

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