Inhibitors degradation and microbial response during continuous anaerobic conversion of hydrothermal liquefaction wastewater

Si, Buchun; Li, Jiaming; Zhu, Zongmin; Shen, Mengmeng; Lu, Jianwen; Duan, Na; Zhang, Yuanhui; Liu, Qiang; Huang, Yun; Liu, Zhidan

doi:10.1016/j.scitotenv.2018.02.310

Cited by 79 publications

(35 citation statements)

References 45 publications

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“…For instance, about 20% of the carbon was transferred into PHWW, mainly in forms of monosaccharides, oligosaccharides and short chain organic acids (i.e., acetic acids) (Barreiro et al, 2015;Elliott et al, 2013;Lu et al, 2017;Toor et al, 2011;Zhou et al, 2013). Thus, downstream technologies that can further recover these dissolved organic carbons from PHWW by converting them into higher value products should be pursued as an essential step to promote the overall economic viability and economic feasibility of HTL (Si et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Improved methane production and energy recovery of post-hydrothermal liquefaction waste water via integration of zeolite adsorption and anaerobic digestion

Liu

Zhang³

et al. 2019

Science of The Total Environment

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Hydrothermal liquefaction (HTL) is a promising technology for converting organic wastes into bio-crude oil, with organic-rich post-hydrothermal liquefaction wastewater (PHWW) as by-product. In this study, zeolite adsorption and anaerobic digestion (AD) were integrated to improve the methane production and energy recovery of PHWW from Chlorella 1067. A statistical design for maximum toxicants removal by zeolite was applied before AD process. Zeolite could mitigate the inhibition associated to compounds such as ammonia, N-heterocyclic compounds, etc. in PHWW and thereby shortening the lag phase and increasing methane production by 32-117% compared with that without zeolite adsorption. Zeolite adsorption also increased energy recovery efficiency (up to 70.5%) for this integrated system. Integration of HTL and AD brought higher energetic return from feedstock via oil and biomethane production, which may offer insight into industrial application of microalgae biomass in the circular economy. In addition, carbon and nitrogen flow for the integrated process was determined.

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Section: Introductionmentioning

confidence: 99%

Improved methane production and energy recovery of post-hydrothermal liquefaction waste water via integration of zeolite adsorption and anaerobic digestion

Liu

Zhang³

et al. 2019

Science of The Total Environment

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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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“…Both APL and HTL-AP contain organics such as acetic acid that can serve as a substrate for AD. High concentrations of acetic acid have been observed in APL and HTL-AP (Leng and Zhou 2018;Seyedi 2018;Si et al 2018). However, the presence of some constituents that may be biodegradable but are toxic to anaerobic microbes makes AD of these aqueous liquids currently very challenging.…”

Section: Introductionmentioning

confidence: 99%

Current status of biomethane production using aqueous liquid from pyrolysis and hydrothermal liquefaction of sewage sludge and similar biomass

Seyedi

Venkiteshwaran

2020

Rev Environ Sci Biotechnol

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Pyrolysis and hydrothermal liquefaction (HTL) are potential technologies for renewable energy production and waste valorization using municipal wastewater sewage sludge and other lignocellulosic biomass. However, the organic-rich aqueous pyrolysis liquid (APL) and HTL aqueous phase (HTL-AP) produced currently have no apparent use and are challenging to manage. Furthermore, the toxic organic compounds in them can be harmful to the environment. Anaerobic digestion (AD) may be a viable method to manage the liquids and recover energy in APL and HTL-AP in form of methane-rich biogas. Integrating thermochemical processes with AD could promote a circular economy by recovering resources and reducing environmental pollution. The challenge, however, is the presence of toxic compounds recalcitrant to anaerobic biodegradation such as phenols and nitrogen-containing organics that can inhibit methaneproducing microbes. This review presents information

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Inhibitors degradation and microbial response during continuous anaerobic conversion of hydrothermal liquefaction wastewater

Cited by 79 publications

References 45 publications

Improved methane production and energy recovery of post-hydrothermal liquefaction waste water via integration of zeolite adsorption and anaerobic digestion

Improved methane production and energy recovery of post-hydrothermal liquefaction waste water via integration of zeolite adsorption and anaerobic digestion

Treatment of recalcitrant wastewater and hydrogen production via microbial electrolysis cells

Current status of biomethane production using aqueous liquid from pyrolysis and hydrothermal liquefaction of sewage sludge and similar biomass

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