Carbon-negative biomethane fuel production: Integrating anaerobic digestion with algae-assisted biogas purification and hydrothermal carbonisation of digestate

2021 ◽  
Vol 148 ◽  
pp. 106029
Author(s):  
Uttam K. Roy ◽  
Tanja Radu ◽  
Jonathan L. Wagner
Keyword(s):  
Anaerobic Digestion ◽  
Fuel Production ◽  
Biogas Purification ◽  
Hydrothermal Carbonisation

scholarly journals An Assessment of Different Integration Strategies of Hydrothermal Carbonisation and Anaerobic Digestion of Water Hyacinth

Energies ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5983
Author(s):  
Aaron E. Brown ◽  
Jessica M. M. Adams ◽  
Oliver R. Grasham ◽  
Miller Alonso Camargo-Valero ◽  
Andrew B. Ross
Keyword(s):  
Anaerobic Digestion ◽  
Water Hyacinth ◽  
Large Scale ◽  
Aquatic Macrophyte ◽  
Integration Strategy ◽  
Bioenergy Generation ◽  
Global Presence ◽  
Freshwater Bodies ◽  
Hydrothermal Carbonisation ◽  
Integration Strategies

Water hyacinth (WH) is an invasive aquatic macrophyte that dominates freshwater bodies across the world. However, due to its rapid growth rate and wide-spread global presence, WH could offer great potential as a biomass feedstock, including for bioenergy generation. This study compares different integration strategies of hydrothermal carbonisation (HTC) and anaerobic digestion (AD) using WH, across a range of temperatures. These include (i) hydrochar combustion and process water digestion, (ii) hydrochar digestion, (iii) slurry digestion. HTC reactions were conducted at 150 °C, 200 °C, and 250 °C. Separation of hydrochars for combustion and process waters for digestion offers the most energetically-feasible valorisation route. However, hydrochars produced from WH display slagging and fouling tendencies; limiting their use in large-scale combustion. AD of WH slurry produced at 150 °C appears to be energetically-feasible and has the potential to also be a viable integration strategy between HTC and AD, using WH.

scholarly journals Valorisation of the liquid fraction from hydrothermal carbonisation of sewage sludge by anaerobic digestion

2017 ◽  
Vol 93 (2) ◽  
pp. 450-456 ◽  
Author(s):  
John A Villamil ◽  
Angel F Mohedano ◽  
Juan J Rodriguez ◽  
M Angeles de la Rubia
Keyword(s):  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Liquid Fraction ◽  
Hydrothermal Carbonisation

scholarly journals Valorisation of macroalgae via the integration of hydrothermal carbonisation and anaerobic digestion

2020 ◽  
Vol 312 ◽  
pp. 123539 ◽  
Author(s):  
Aaron E. Brown ◽  
Gillian L. Finnerty ◽  
Miller Alonso Camargo-Valero ◽  
Andrew B. Ross
Keyword(s):  
Anaerobic Digestion ◽  
Hydrothermal Carbonisation

Production of High Calorific Biogas from Organic Wastewater and Enhancement of Anaerobic Digestion

2012 ◽  
Vol 550-553 ◽  
pp. 522-528 ◽  
Author(s):  
Yan Qiu Nie ◽  
Yu Xiu Li ◽  
Hui He ◽  
Wen Jing Zhou ◽  
Zhao Hui Pang ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Retention Time ◽  
Biogas Production ◽  
Calorific Value ◽  
Optimal Dose ◽  
Organic Loading Rate ◽  
Solid Retention Time ◽  
Step Process ◽  
Biogas Purification ◽  
Organic Wastewater

Anaerobic digestion is a widely applied technology to produce biogas from organic wastewater. The biogas calorific value depends on the methane-content. For biogas flows >100 m3/h, the two-step process is usually used for production of high calorific biogas from organic wastewater: the first step, anaerobic digestion; the second step, biogas purification. However, for biogas flows 3/h, biogas purification is not economical, and one-step process according to the big gap between methane and non-methane-gas in solubility at higher pressure or lower temperature, should be condidered. New anaerobic digestion processes, such as micro-aerobic process, electrolysis enhancing methane production process, process of internal circulation anaerobic digester (ICAD) with sewage source heat pump, may all enhance biogas producton or lower biogas production cost. In addition, suitable environmental conditions, such as organic loading rate (OLR), solid retention time (SRT), hydraulic retention time (HRT) and surface area, are all beneficial to enhance methane fermentation. Furthermore, new operation modes and optimal dose of trace metals might be selected.

The Composting Treatment of Residue from Biological Municipal Waste Anaerobic Digestion

2010 ◽  
Vol 129-131 ◽  
pp. 703-707 ◽  
Author(s):  
Lei Feng ◽  
Run Dong Li
Keyword(s):  
Anaerobic Digestion ◽  
Mass Loss ◽  
Methane Concentration ◽  
Gas Production ◽  
Municipal Waste ◽  
High Solids ◽  
Biodegradation Rate ◽  
Fuel Production ◽  
Digestive Juice ◽  
Compost Quality

The high-solids anaerobic digestion of biological municipal waste (BMW) produces both a valuable fuel production (methane) and an anaerobic digestion residue. Compost technology was chosen to treat with anaerobic digestion residue and the conclusion was. 1) The anaerobic digestion of the bio-waste as a whole worked fine during the stabilization stage, the maximum daily gas production happened on the 125th day, the maximum was 91.86L/d and TS concentration in the digestive juice was14.78%, methane concentration was about 50-55%, HRT was 20 days and the biodegradation rate was 65.28%;2) The temperature of AD residue compost entered the thermophilic phase(55°C) on day 3 of composting, lasted at least 3days, the changes in pH followed the same trend with a rise from 6.18 to 7.26 on the 14th day, he final mass loss was 30.12%, which resulted in the compost quality higher than innocuity criteria.

scholarly journals Integration of Hydrothermal Carbonisation with Anaerobic Digestion; Opportunities for Valorisation of Digestate

Energies ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1586 ◽  
Author(s):  
Kiran R. Parmar ◽  
Andrew B. Ross
Keyword(s):  
Anaerobic Digestion ◽  
Biogas Production ◽  
Poor Quality ◽  
Process Water ◽  
Effect Of Temperature ◽  
Solid Loading ◽  
Agricultural Residue ◽  
Heating Value ◽  
Methane Potential ◽  
Hydrothermal Carbonisation

Hydrothermal carbonisation (HTC) has been identified as a potential route for digestate enhancement producing a solid hydrochar and a process water rich in organic carbon. This study compares the treatment of four dissimilar digestates from anaerobic digestion (AD) of agricultural residue (AGR); sewage sludge (SS); residual municipal solid waste (MSW), and vegetable, garden, and fruit waste (VGF). HTC experiments were performed at 150, 200 and 250 °C for 1 h using 10%, 20%, and 30% solid loadings of a fixed water mass. The effect of temperature and solid loading to the properties of biocoal and biochemical methane potential (BMP) of process waters are investigated. Results show that the behaviour of digestate during HTC is feedstock dependent and the hydrochar produced is a poor-quality solid fuel. The AGR digestate produced the greatest higher heating value (HHV) of 24 MJ/kg, however its biocoal properties are poor due to slagging and fouling propensities. The SS digestate process water produced the highest amount of biogas at 200 °C and 30% solid loading. This study concludes that solely treating digestate via HTC enhances biogas production and that hydrochar be investigated for its use as a soil amender.

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