Degradation of industrial tannin and lignin from pulp mill effluent by aerobic granular sludge technology

Vashi, H.; Iorhemen, Oliver Terna; Tay, Joo‐Hwa

doi:10.1016/j.jwpe.2018.09.002

Cited by 35 publications

(22 citation statements)

References 40 publications

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“…Similar results were found in a study by Mupondi et al [55], in which storage of pine bark for 90 days led to significant CT loss. While CT is known to be a relatively resistant substance and not easily decomposed in nature, it is also known that CT-rich material such as tree bark is often occupied by CT-utilizing bacteria and fungi [56][57][58]. Rapid self-heating of the bark piles indicates high microbial activity, and it is very likely that CT loss in bark during storage is largely accounted for by microbial activity.…”

Section: Discussionmentioning

confidence: 99%

Influence of storage on the physical and chemical properties of Scots pine bark

et al. 2020

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Bark is currently used mainly to produce energy, but the extraction of valuable compounds before combustion offers an interesting cascading use for debarking biomass. Buffer storage is an inevitable part of bark biomass logistics, but substantial dry matter and extractive losses can degrade the properties and reduce the economic value of the raw material during storage. In this study, moisture and ash content, calorific value, and extractives content and composition of Scots pine (Pinus sylvestris) sawmill bark were determined over 2 months of buffer storage, and the change in energy content during storage was calculated. The results showed that the energy content (MWh m−3) of the bark increased 3% during storage, while at the same time the moisture content decreased 16%. The content of acetone-soluble extractives decreased markedly, with only 56% of the original amount remaining after 8 weeks of storage. In particular, hydrophilic, phenolic extractive compounds were rapidly lost after debarking and piling of the bark. About 60% of condensed tannins (CT) and about 26% of the quantified lipophilic compounds were lost after 2 weeks of storage. The fastest rate of decrease and the most significant changes in extractives content and composition occurred within the first 2 weeks of storage. Utilization of these valuable compounds necessitates fast supply of material for further processing after debarking. The comprehensive utilization of bark requires efficiency at all levels of the supply chain to ensure that tree delivery times are kept short and loss of bark is avoided during harvest and transport.

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Section: Discussionmentioning

confidence: 99%

Influence of storage on the physical and chemical properties of Scots pine bark

et al. 2020

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“…The aerobic granular sludge (AGS), compared to traditional activated sludge, has more excellent characteristics in terms of regular shape and compact structure, sedimentation, biomass accumulation, resistance to toxic compounds and high organic load, and removal efficiency of nutrient salts [5][6][7][8]. These made the AGS technique made to be widely used in treatments of high-load industrial wastewater as well as sewage [9][10][11][12]. The stability of AGS is the most important issue in applying AGS-based process in various fields and is related many factors including the composition of influent wastewater, carbon to nitrogen (C/N) ratio, food to microorganisms (F/M) ratio, composition of extracellular polymeric substances (EPS), and rate and temperature of aeration [4,8,[13][14][15][16][17], among which, the C/N ratio of influent water is one of the most important factors for the growth of microorganism and biodegradation of nutrient salt [13,[18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Effects of carbon to nitrogen ratio on the performance and stability of aerobic granular sludge

Kim

Ahn

2020

Environmental Engineering Research

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The purpose of this study was to assess the nutrient salts removal efficiency and stability of the aerobic granular sludge (AGS) by change in C/N (carbon to nitrogen) ratio. The laboratory-scale experiments were performed to analyze the removal efficiencies for organic matter and contents of nitrogen, MLSS, sludge volume index, and extracellular polymeric substances (EPS) under C/N ratio conditions of 5.0, 10.0, 15.0, and 20.0. The microorganisms were observed using optical microscope and the microbial communities were analyzed using pyrosequencing. The increase in C/N ratio from 5.0 to 20.0 increased the organic matter and nitrogen removal efficiency to 95.9 and 79.1%, respectively. For the EPS contents, an influencing factor of granule stability, the polysaccharides to protein (PS/PN) ratio increased from 0.55 to 0.79. For the microbial community, the <i>Thauera</i> was the most common genus in ending phase occupying 63.7%. This microorganism is regarded as one contributing to organic matter degradation and improved production of EPS including AGS of microorganism, thus, may be an explanation of the results of this study such as increase in organic material in AGS and improvement of denitrification efficiency and contents of EPS with increase in C/N ratio.

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“…The application of AGS technology to treatment of pulp mill effluent has achieved significant degradation of both lignin and tannin (97% at an initial concentration of 50 mg/L and above 60% at 100 mg/L). 147 Microorganisms with dominant microbes of Pseudomonas, Corynebacteriaceae, and Flavobacterium were found to degrade diverse recalcitrant compounds. 147 Using sequencing batch biofilm reactor with municipal sludge being seed culture, Kuang et al 148 conducted treatment of lignin-containing wastewater and found the cometabolic system with glucose supplementation as a growth substrate improved lignin and total organic carbon removal by 14.7 and 32%, respectively, compared to the control (without glucose addition).…”

Section: Advanced Process Design For Lignin Bioconversionmentioning

confidence: 99%

“…The application of AGS technology to treatment of pulp mill effluent has achieved significant degradation of both lignin and tannin (97% at an initial concentration of 50 mg/L and above 60% at 100 mg/L) 147. The application of AGS technology to treatment of pulp mill effluent has achieved significant degradation of both lignin and tannin (97% at an initial concentration of 50 mg/L and above 60% at 100 mg/L) 147.…”

mentioning

confidence: 99%

“…example, aerobic granular sludge (AGS) has emerged as a promising technology for wastewater treatment in that the coexistence of aerobic, anoxic, and anaerobic regions and therefore high diversity of microbes. Microorganisms with dominant microbes of Pseudomonas, Corynebacteriaceae, and Flavobacterium were found to degrade diverse recalcitrant compounds 147. Microorganisms with dominant microbes of Pseudomonas, Corynebacteriaceae, and Flavobacterium were found to degrade diverse recalcitrant compounds 147.…”

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confidence: 99%

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Biotransformation of lignin: Mechanisms, applications and future work

Zheng

2019

Biotechnology Progress

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As one of the most abundant polymers in biosphere, lignin has attracted extensive attention as a kind of promising feedstock for biofuel and bio-based products. However, the utilization of lignin presents various challenges in that its complex composition and structure and high resistance to degradation. Lignin conversion through biological platform harnesses the catalytic power of microorganisms to decompose complex lignin molecules and obtain value-added products through biosynthesis.Given the heterogeneity of lignin, various microbial metabolic pathways are involved in lignin bioconversion processes, which has been characterized in extensive research work. With different types of lignin substrates (e.g., model compounds, technical lignin, and lignocellulosic biomass), several bacterial and fungal species have been proved to own lignin-degrading abilities and accumulate microbial products (e.g., lipid

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Degradation of industrial tannin and lignin from pulp mill effluent by aerobic granular sludge technology

Cited by 35 publications

References 40 publications

Influence of storage on the physical and chemical properties of Scots pine bark

Influence of storage on the physical and chemical properties of Scots pine bark

Effects of carbon to nitrogen ratio on the performance and stability of aerobic granular sludge

Biotransformation of lignin: Mechanisms, applications and future work

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