Anaerobic conversion of the hydrothermal liquefaction aqueous phase: fate of organics and intensification with granule activated carbon/ozone pretreatment

Si, Buchun; Yang, Libin; Zhou, Xuefei; Watson, Jamison; Tommaso, Giovana; Chen, Wan‐Ting; Liu, Qiang; Duan, Na; Liu, Zhidan; Zhang, Yuanhui

doi:10.1039/c8gc02907e

Cited by 94 publications

(54 citation statements)

References 61 publications

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“…Compared to similar technologies for AD sludge management (e.g., landfilling), HTP not only sterilizes the sludge but also converts it into valuable end products with 11-times higher energy recovery and emissions in GHG decreased by 78-85% [2]. Multiple published studies also suggest that an integration of AD and HTP could benefit a resilient water-energy nexus [2,5].…”

Section: Technologiesmentioning

confidence: 99%

“…Energy demand and GHG emissions for implementing the entire system are excluded.) (the data was from previous publications, see more details in [2,5] and supplementary data).…”

Section: Technologiesmentioning

confidence: 99%

“…HTP is a promising method to manage sewage sludge as it can concurrently convert sewage sludge into useful products while also reducing the environmental and health risks posed by excess sewage sludge in the environment. Products from HTP are normally biocrude oil, aqueous products (containing fertilizer precursors), and hydrochar [5,6]. Yields from the process depend on the reaction temperature [6], reaction time [6], feedstock characteristics (e.g., biochemical compositions, physicochemical properties, ash contents [2,6,7], initial pressure [8,9], total solid content [7], co-solvents [9,10], and catalyst composition [6,9].…”

Section: Introductionmentioning

confidence: 99%

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A perspective on hydrothermal processing of sewage sludge

Chen

Haque

et al. 2020

Current Opinion in Environmental Science & Health

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The US annually produces 79 million dry tons of liquid organic waste including sewage sludge.Anaerobic digestion can only reduce the sludge volume by 50% in mass, leaving the other half as a growing waste management and hygienic problem. Hydrothermal Processing (HTP), a set of several chemical digestion processes, could be employed to convert sewage sludge into valuable products and minimize potential environmental pollution risks. Specifically, hydrothermal carbonization and hydrothermal liquefaction have been extensively studied to sustainably manage sludge. Two of the main reasons for this are the high upscaleability of HTP for public waste management and that it is estimated that HTP can recover eleven times more energy from waste products than landfilling. An integration of HTP with anaerobic digestion or recycling the soluble organics (in the HTP aqueous products) into the HTP process could lead to a higher overall rate of energy recovery for municipal sewage sludge.

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Section: Technologiesmentioning

confidence: 99%

“…Energy demand and GHG emissions for implementing the entire system are excluded.) (the data was from previous publications, see more details in [2,5] and supplementary data).…”

Section: Technologiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A perspective on hydrothermal processing of sewage sludge

Chen

Haque

et al. 2020

Current Opinion in Environmental Science & Health

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“…Other benefits of co-digestion include more optimized use of the existing capacity in anaerobic digesters and the generation of more stabilized and nutrient-balanced digestate for the purpose of soil amendment. More technological integration (e.g., granular sludge, hydrothermal liquefaction, microbial fuel cell, and biochar application) will continue to be developed in AD systems [118][119][120][121][122][123][124][125][126]. According to the current research trend, the critical challenge in AD, as well as the bioeconomy is, therefore, to find room for the next wave of innovations that can boost technology and bio-based products to support a more transformative and sustainable waste management of organic fraction in MSW.…”

Section: Anaerobic Digestionmentioning

confidence: 99%

A critical review: emerging bioeconomy and waste-to-energy technologies for sustainable municipal solid waste management

Tsui

Wong

2019

Waste Dispos. Sustain. Energy

143

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Municipal solid waste (MSW) management has emerged as probably the most pressing issue many governments nowadays are facing. Traditionally, Waste-to-Energy(WtE) is mostly associated with incineration, but now, with the emergence of the bioeconomy, it embraces a broader definition comprising any processing technique that can generate electricity/heat or produce a waste-derived fuel. Under the ambit of the circular economy many nations are looking for, additional effort must be made to be sure of acquiring the most updated information and paving a sustainable path for managing MSW in such a frame. In this regard, we have undertaken a critical review of various technologies, with their updated progress, involved in the exploitation of MSW as a renewable resource, along with the critical advantages and limitations on energy and material cycling for sustainable MSW management. Incineration, the most widely used method, is nowadays difficult to further apply due to its dubious reputation and social opposition. Meanwhile, to address the organic fraction of MSW which currently is mostly unrecycled and causes disposal issues, the biological approach presents an attractive option. The new emphasis of bioeconomy leads us to understand how environmental biotechnologies should be better connected/integrated for more sustainable MSW management. This article is concluded with advances of future prospects, which can serve as a timely reminder to encourage competent authorities/researchers to work towards further improvement of the present MSW management system.

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“…[50] , while scant attention is attracted on PHWW utilization and treatment. In recent years, some researchers have treated PHWW using single anaerobic digestion technology [51][52][53] , pretreatment by organic solvents before anaerobic digestion, and microalgae cultivation [44] . Although it could produce biogas like methane, partial organic matters in the PHWW were not degraded or had a deleterious effect on fermentative microbes and microalgae, which limited its further development.…”

Section: Post-hydrothermal Liquefaction Wastewatermentioning

confidence: 99%

Treatment of recalcitrant wastewater and hydrogen production via microbial electrolysis cells

Shen

Zhao

et al. 2019

International Journal of Agricultural and Biological Engineering

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A large amount of real complex wastewaters are generated every year, which leads to a great environmental burden. Various treatment technologies were deployed to remove the contaminants in the wastewaters. However, these actual wastewaters have not been sufficiently treated due to their complex properties, high-concentration organics, incomplete utilization of hard-biodegradable substrates, the high energy input required, etc. Recently, microbial electrolysis cells (MECs), a great potential technology, has emerged for various wastewater treatment, because not only do they demonstrate satisfactory performance during wastewater treatment, but they also generate renewable H 2 as a clean energy carrier. Unlike previous reviews, this review introduced the characteristics of every complicated wastewater, and focused on analyzing and summarizing MEC development for wastewater treatment. The performances of MECs were systematically reviewed in terms of organics removal, H 2 production, Columbic efficiency, and energy efficiency. MEC performances for treating actual complex wastewaters and producing H 2 can be optimized through operation parameters, electrode materials, catalyst materials, etc. In addition, the challenges and opportunities including complexity of wastewaters, instability of H 2 production, robust microorganisms, effect of membrane on two-chamber MEC, and integration of MEC with other treatment processes were deeply discussed. Except for the technical feasibility, both environmental feasibility and economic feasibility also need to meet social requirements. This review can indeed provide a basis for high-efficiency treatment and practical commercial applications of recalcitrant wastewaters via MECs in the future.

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Anaerobic conversion of the hydrothermal liquefaction aqueous phase: fate of organics and intensification with granule activated carbon/ozone pretreatment

Abstract: Hydrothermal liquefaction (HTL) is considered to be a promising route for biofuel production from wet biomass.

Cited by 94 publications

References 61 publications

A perspective on hydrothermal processing of sewage sludge

A perspective on hydrothermal processing of sewage sludge

A critical review: emerging bioeconomy and waste-to-energy technologies for sustainable municipal solid waste management

Treatment of recalcitrant wastewater and hydrogen production via microbial electrolysis cells

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