Temperature-Phased Biological Hydrolysis and Thermal Hydrolysis Pretreatment for Anaerobic Digestion Performance Enhancement

Mehari, Beraki Bahre; Chang, Sheng; Hong, Youngseck; Chen, Han

doi:10.3390/w10121812

Cited by 23 publications

(6 citation statements)

References 41 publications

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“…The first stage of the TPAD was thermophilic digestion 55 • C followed by 42 • C which obtained a 23% reduction in VSS. A thermophilic single digestion at 165 • C resulted in a 22% reduction in VSS [56]. The sCOD increased by 287% for the TPAD while the sCOD for the thermophilic digester increased by 378% compared to AD of untreated sludge.…”

Section: Temperature Phased Anaerobic Digestion (Tpad)mentioning

confidence: 99%

A Review of Pretreatment Methods to Enhance Solids Reduction during Anaerobic Digestion of Municipal Wastewater Sludges and the Resulting Digester Performance: Implications to Future Urban Biorefineries

et al. 2020

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The rapid increase in the population is expected to result in the approaching of design capacity for many US wastewater treatment plants (WWTPs) over the next decade. WWTPs treat both municipal and industrial wastewater influents, resulting in the production of biosolids after digestion. Biogas, a potential recovered alternative energy source, is also produced as an output from successful anaerobic digestion. More than 7M of dry tons/year of biosolids produced in the US are most often disposed in either landfills or land-applied (~80%). These options are becoming more challenging to implement due to increases in transportation costs and tipping fees, decreases in the availability of landfill/landfarm space, and most importantly, increased regulations. This situation is strongly encouraging WWTPs to find alternatives for the disposal of biosolids. Developing alternative management/disposal options for biosolids are evolving. One of the most attractive alternative option from a sustainability perspective are biorefineries (converts waste to commercial products), which are a fast-growing option given the push toward circular urban source economies (little to no waste generation). Anaerobic digestion has been widely applied in WWTPs to reduce the volume of activated sludge due to its low energy requirements, effective handling of fluctuations due to organic loading rate, relative flexibility with temperature and pH changes, and since biogas is produced that can be transformed into energy. Various pretreatment methods for waste sludges prior to digestion that have been studied to reduce solids production and increase the energetic content of the biogas are presented and discussed. Solids handling and management, which comprises ~60% of the operational cost of a WWTP, is estimated to save more than $100 M annually by achieving at least 20% reduction in the annual production of biosolids within the US. This review incorporates an assessment of various pretreatment methods to optimize the anaerobic digestion of waste sludges with a focus on maximizing both biosolids reduction and biogas quality.

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Section: Temperature Phased Anaerobic Digestion (Tpad)mentioning

confidence: 99%

A Review of Pretreatment Methods to Enhance Solids Reduction during Anaerobic Digestion of Municipal Wastewater Sludges and the Resulting Digester Performance: Implications to Future Urban Biorefineries

et al. 2020

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“…A similar trend was observed for samples with the addition of iron, regardless of its dose (Figure 2e, Table S5). The reduction in TS could probably be caused by the release of VFAs that had been oven drying during indicator measurement [50]. In turn, in the case of thermochemical method 2 (addition of iron), it could be identified by dosing metallic iron in powder.…”

Section: Selection Of Pretreatment Conditionsmentioning

confidence: 99%

Stimulating Methane Production from Poultry Manure Digest with Sewage Sludge and Organic Waste by Thermal Pretreatment and Adding Iron or Sodium Hydroxide

Jasińska,

Grosser,

Meers

et al. 2024

Energies

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The European Union’s energy policy favors increasing the share of renewable energy in total energy production. In this context, the co-digestion of various waste streams seems an interesting option. This study aimed to determine the effect of selected pretreatment methods on the efficiency and kinetics of the co-digestion process of poultry manure with sewage sludge and organic waste. This research was carried out in four stages: (1) the selection of the third component of the co-digestion mixture; (2) the determination of the most favorable inoculum-to-substrate ratio for the co-digestion mixture; (3) the selection of the most favorable pretreatment parameters based on changes in volatile fatty acids, ammonium nitrogen, extracellular polymers substances (EPS) and non-purgeable organic carbon (NPOC); and (4) the evaluation of anaerobic co-digestion based on the result of the BMP tests and kinetic studies. All the pretreatment methods increased the degree of organic matter liquefaction as measured by the NPOC changes. Waste with a high fat content showed the highest methane potential. The addition of grease trap sludge to feedstock increased methane yield from 320 mL/g VSadd to 340 mL/g VSadd. An optimal inoculum-to-substrate ratio was 2. The pretreatment methods, especially the thermochemical one with NaOH, increased the liquefaction of organic matter and the methane yield, which increased from 340 mL/g VSadd to 501 mL/g VSadd (trial with 4.5 g/L NaoH).

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“…The second bioreactor of the TPAD system is characterised by methane production. Obtained digestate can be reused in agriculture (70).…”

Section: Continuous Stirred Tank Reactor (Cstr) and Its Modificationsmentioning

confidence: 99%

Biogas Production Systems and Upgrading Technologies: A Review

Andlar

Belskaya

Morzak

et al. 2021

Food Technol. Biotechnol. (Online)

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The underutilized biomass and different organic waste streams are today in the focus of research for renewable energy production due to the effusive use of fossil fuels and greenhouse gases emission. In addition, one of the major environmental problems is also a constant increase of the number of organic waste streams. In lot countries, sustainable waste management, including waste prevention and reduction, has become a priority as a means to reduce pollution and greenhouse gas emission. To provide solutions for both energy-related and environmental tasks, application of biogas technologies is one of the promising solutions. This review is aimed to present conventional and novel biogas production systems, as well as purification and upgrading technologies, nowadays applicable in the large scale, with a special focus on the CO2 and H2S removal. It also gives an overview of feedstocks and prominent parameters for biogas production, together with the digestate utilization and application of molecular biology in order to improve the biogas production.

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Temperature-Phased Biological Hydrolysis and Thermal Hydrolysis Pretreatment for Anaerobic Digestion Performance Enhancement

Cited by 23 publications

References 41 publications

A Review of Pretreatment Methods to Enhance Solids Reduction during Anaerobic Digestion of Municipal Wastewater Sludges and the Resulting Digester Performance: Implications to Future Urban Biorefineries

A Review of Pretreatment Methods to Enhance Solids Reduction during Anaerobic Digestion of Municipal Wastewater Sludges and the Resulting Digester Performance: Implications to Future Urban Biorefineries

Stimulating Methane Production from Poultry Manure Digest with Sewage Sludge and Organic Waste by Thermal Pretreatment and Adding Iron or Sodium Hydroxide

Biogas Production Systems and Upgrading Technologies: A Review

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