Development of biochemical sulfide potential (BSP) test for sulfidogenic biotechnology application

Chen, Lin; Tsui, To Hung; Ekama, George A.; Mackey, Hamish R.; Hao, Tianwei; Chen, Guanghao

doi:10.1016/j.watres.2018.02.009

Cited by 16 publications

(4 citation statements)

References 60 publications

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“…The release of organic matter and reduction of MSW were promoted by sulfate reduction (Figure ), suggesting that the hydrolysis of MSW was enhanced, which could provide a sufficient substrate for VFA production. The previous study revealed that sulfide could enhance the hydrolysis of waste sludge by improving the hydrolytic enzymes and the disruption of the waste sludge flocs. , In addition, hydrogenotrophic SRB could provide low H 2 partial pressure for hydrogen-producing acetogenic bacteria, which facilitated the production of acetic acid . The restriction of methanogens by sulfide might be another reason for the enhancement of VFA production …”

Section: Resultsmentioning

confidence: 99%

“…The previous study revealed that sulfide could enhance the hydrolysis of waste sludge by improving the hydrolytic enzymes and the disruption of the waste sludge flocs. 18,37 In addition, hydrogenotrophic SRB could provide low H 2 partial pressure for hydrogen-producing acetogenic bacteria, which facilitated the production of acetic acid. 38 The restriction of methanogens by sulfide might be another reason for the enhancement of VFA production.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The interactions among VFA producers and SRB are related to various factors (such as chemical oxygen demand (COD)/SO 4 2– , type of organics, and temperature) . Sulfate reduction could degrade organic waste efficiently and compete with VFA producers for substrates. , In addition, acidogenesis could enhance the sulfidogenesis by providing a reliable carbon source for SRB, and the degradation of propionate by SRB was considered a key degradation pathway during the fermentation process . The previous study showed that sulfide, the main product of sulfidogenesis, could accelerate the disintegration of waste sludge and cell lysis .…”

Section: Introductionmentioning

confidence: 99%

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Co-Metabolic Mechanism Analysis of Sulfidogenesis and Acidogenesis for Mariculture Solid Waste Treatment: Key Functional Microorganisms and Enzymes

Liu,

Deng,

et al. 2023

ACS Sustainable Chem. Eng.

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Sulfidogenesis is a non-negligible process during the acidogenic fermentation of mariculture solid waste (MSW), and its interactions with acidogenesis are still unclear. To fill this gap, this study explored the co-metabolism mechanisms of acidogenesis and sulfidogenesis during the acidogenic fermentation of MSW with thermal (TH) pretreatment, alkaline fermentation (AF), and their combination (TH-AF) pretreatment. The interactions of sulfidogenesis and acidogenesis were altered by the changes in substrate availability and fermentation environment under the intervention of TH and AF pretreatments. Both acidogenesis and sulfidogenesis were boosted with TH pretreatment by supplying adequate substrates, and their competition for substrates was alleviated. Moreover, sulfidogenesis was constrained by 87.3% with TH-AF pretreatment, which reduced volatile fatty acid (VFA) consumption by sulfate reduction bacteria (SRB) and further enhanced the VFA accumulation. Notably, acidogenesis could be promoted by sulfidogenesis due to the enhancement of MSW hydrolysis and enrichment of acidogenic bacteria (Prolixibacter, Ruminococcus, etc.). Different pretreatments could redirect the metabolic pathways by changing the types of key functional microorganisms and enzymes in MSW anaerobic fermentation. Overall, this study provides useful information for developing an efficient and sustainable treatment of MSW.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Co-Metabolic Mechanism Analysis of Sulfidogenesis and Acidogenesis for Mariculture Solid Waste Treatment: Key Functional Microorganisms and Enzymes

Liu,

Deng,

et al. 2023

ACS Sustainable Chem. Eng.

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“…The sludge sulfide production potential was evaluated using the biochemical sulfide potential (BSP) test . Treated sludge (40 mL, 0–15 V) and 40 mL of SRB sludge as inoculum were mixed in the serum bottles (125 mL) to reach an SRB sludge-to-treated sludge ratio of 2 in terms of volatile suspended solids.…”

Section: Methodsmentioning

confidence: 99%

Electrochemical Pretreatment for Sludge Sulfide Control without Chemical Dosing: A Mechanistic Study

Zeng¹,

Hao

Sun³

et al. 2019

Environ. Sci. Technol.

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Sulfide is a toxic and corrosive odorant generated in various sludge treatment and disposal systems. We developed an electrochemical pretreatment (EPT) approach to eliminate sludge sulfide production without adding chemicals. Biochemical sulfide potential (BSP) test was used to evaluate the effectiveness of EPT on sludge sulfide production. The sulfide control was effective with EPT, and we determined the underlying mechanism of EPT. EPT which was operated at 12 V for 720 s eliminated 99% of dissolved sulfide and 100% of gaseous H 2 S (g) . In comparison, the dissolved sulfide reached 104 ± 1 mg S/L in the control BSP test. A sulfur mass balance analysis in the BSP test showed that 90% of the produced sulfide was removed via metal precipitation. Metal distribution results confirmed that metals (i.e., Fe, Mn, and Ni) in the sludge became soluble after EPT and were released from their residual and organically bound fractions. EPT which was operated at 15 V solubilized around 73, 92, and 72% of Fe, Mn, and Ni, and these metals precipitated the sulfide that was produced from biological sulfate reduction. Sludge analysis revealed that EPT disintegrated sludge flocs and disrupted metal-binding functional groups. Specifically, reduction of 17% CO functional groups in the sludge was found, which could be associated with metal release. The impact of oxidants (e.g., chlorine) generated from EPT on sulfide oxidation was minimal. The findings of this study broadened up our understanding of the electrochemical process for sulfide control during saline sludge digestion.

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

Tsui

Wong

2019

Waste Dispos. Sustain. Energy

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137

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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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Development of biochemical sulfide potential (BSP) test for sulfidogenic biotechnology application

Cited by 16 publications

References 60 publications

Co-Metabolic Mechanism Analysis of Sulfidogenesis and Acidogenesis for Mariculture Solid Waste Treatment: Key Functional Microorganisms and Enzymes

Co-Metabolic Mechanism Analysis of Sulfidogenesis and Acidogenesis for Mariculture Solid Waste Treatment: Key Functional Microorganisms and Enzymes

Electrochemical Pretreatment for Sludge Sulfide Control without Chemical Dosing: A Mechanistic Study

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

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