Effective treatment of fermentation wastewater containing high concentration of sulfate by two-stage expanded granular sludge bed reactors

Wu, Sijun; Dang, Yan; Qiu, Bin; Zhao, Lei; Sun, Dezhi

doi:10.1016/j.ibiod.2015.04.015

Cited by 19 publications

(7 citation statements)

References 32 publications

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“…Many studies on the treatment of wastewater using various bioreactors focused on the low operating temperature of 4 °C [17,18,[20][21][22][23][24][25][26][27][28][29][30][31][32][33]. Nevertheless, few reports have discussed the effect of different OLRs on reactor operation in a fixed-bed anaerobic reactor operated at 4 °C.…”

Section: Discussionmentioning

confidence: 99%

“…Many studies on the treatment of wastewater using various bioreactors focused on the low operating temperature of 4 • C [17,18,[20][21][22][23][24][25][26][27][28][29][30][31][32][33]. Nevertheless, few reports have discussed the effect of different OLRs on reactor operation in a fixed-bed anaerobic reactor operated at 4 • C. In this study, we treated molasses wastewater with increasing OLRs from 0.67 kg/m 3 •d to 4.67 kg/m 3 •d at 4 • C. The maximal treatment OLR of the fixed bed anaerobic reactor were 4.33 kg/m 3 •d at 4 • C; the COD removal rate was approximately 60% at this OLR (Figure 3a), demonstrating the improved efficiency of biogas production in a fixed-bed anaerobic reactor compared to other reactors.…”

Section: Discussionmentioning

confidence: 99%

“…COD removal is an important indicator of the normal operation of the reactor. The effluent COD rose gradually as the OLR was increased, which suggested that COD accumulated in the digester when the OLR was high [19,26]. When the OLR was between 0.67 and 1.33 kg/m 3 •d, a gradual increase in the COD removal rate occurred with increasing OLR at 4 • C. The COD removal rate was 69.5% at an OLR of 1.33 kg/m 3 •d, for which the influent COD and effluent COD were 4000 mg/L and 1220 mg/L, respectively.…”

Section: Influent and Effluent Cod And Cod Removal Rate(a) And Vfa Content(b) With Olr Throughout The Operation Timementioning

confidence: 99%

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Impact of Organic Loading Rate on Performance and Methanogenic Microbial Communities of a Fixed-Bed Anaerobic Reactor at 4 °C

Zhao

Yan

et al. 2020

Water

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We investigated the feasibility of producing biogas in a fixed-bed anaerobic reactor at 4 °C with a gradual increase in organic loading rate (OLR). Reactor efficiency was highest when OLR was 4.33 kg/m3·d, whereas the reactor acidification occurred when OLR was 4.67 kg/m3·d. The values of methane content, biogas production, chemical oxygen demand (COD) removal rate, biogas production rate, acetic acid content, and propionic acid content were 69.3%, 5.33 L, 59.8%, 1.03 L/OLR, 0.17 g/L, and 1.15 g/L, respectively. The pH was stable and ranged from 7.2 to 6.8 when the reactor was operating at 4 °C during OLR increase. The 16S rRNA gene analysis revealed that the dominant archaea were Methanosaetaceae at 30 °C. At 4 °C, the dominant archaea were Methanomicrobiales, which were more abundant in adhering sludge compared to settled sludge. In conclusion, operating a fixed-bed anaerobic reactor at psychrophilic temperatures is more suitable.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Influent and Effluent Cod And Cod Removal Rate(a) And Vfa Content(b) With Olr Throughout The Operation Timementioning

confidence: 99%

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Impact of Organic Loading Rate on Performance and Methanogenic Microbial Communities of a Fixed-Bed Anaerobic Reactor at 4 °C

Zhao

Yan

et al. 2020

Water

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“…The relative abundance of SOB (Sulfuricurvum) and SRB (Desulfovibrio) in Proteobacteria [38,39] for the anaerobic co-digestion of CS and SDW were higher than those for mono-digestion of CS (data not shown). Both SOB and SRB were able to improve the mutual transformation of sulfate and sulfide, with results increasing the removal rate of organic matter [40].…”

Section: Analysis Of Microbial Communitiesmentioning

confidence: 99%

Improved Buffering Capacity and Methane Production by Anaerobic Co-Digestion of Corn Stalk and Straw Depolymerization Wastewater

Yang

Sun

et al. 2018

Energies

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A new method has been developed to improve the buffer capacity and methane production of the anaerobic digestion of Corn Stalk (CS), in which both an anaerobic co-digestion of CS with Straw Depolymerization Wastewater (SDW) and a mono-digestion of CS at different substrate concentrations (25.9, 36.2 and 45.3 mg/L) were investigated. Batch assays were conducted under thermophilic conditions for 70 days, which showed that an anaerobic co-digestion significantly increased the buffering capacity and methane production of the digestion process. The lag time for methane generation resulting from an anaerobic co-digestion of CS with SDW was 10 days, while the lag time for a mono-digestion of CS was 23 days. A maximum methane production of 214.81 mL/g-VS was obtained for the anaerobic co-digestion of CS with SDW when the substrate concentration was 36.2 g/L, which was around 13.54% higher than for mono-digestion of CS of 189.20 mL/g-VS. The removal rate for sulfate increased from 10.43% to 58.40% when the substrate concentration was increased from 25.9 to 45.3 mg/L for the anaerobic co-digestion of CS with SDW. Microbial communities were analyzed using 16S rDNA sequencing technology which showed that anaerobic co-digestion of CS and SDW promotes the growth of methanogens. The relative abundance of these methanogens (Euryarchaeota) for the anaerobic co-digestion of CS with SDW was increased significantly, being approximately 8.25% higher than that of a mono-digestion of CS, which was at a substrate concentration of 36.2 g/L. This means that the anaerobic co-digestion of CS and SDW is beneficial for improving buffer capacity and methane production from the digestion of CS, with higher organic matter and sulfate removal rates also being obtained.

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“…22 Metal irons could be used to change surface charge and adsorption performance of biochar via combination to biochar surface. 23 Considering the nutrients, it was reported that molasses fermentation wastewater contained high concentration of complex constitutions such as organics, metals and proteins, [24][25][26] which must be treated via long time and high cost consuming to meet the discharge standard. 25 Furthermore, there could be potential risk in soil salinization and pollution if it was added directly into soil.…”

Section: Introductionmentioning

confidence: 99%

Biochar prepared from maize straw and molasses fermentation wastewater: application for soil improvement

et al. 2020

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Effective treatment of fermentation wastewater containing high concentration of sulfate by two-stage expanded granular sludge bed reactors

Cited by 19 publications

References 32 publications

Impact of Organic Loading Rate on Performance and Methanogenic Microbial Communities of a Fixed-Bed Anaerobic Reactor at 4 °C

Impact of Organic Loading Rate on Performance and Methanogenic Microbial Communities of a Fixed-Bed Anaerobic Reactor at 4 °C

Improved Buffering Capacity and Methane Production by Anaerobic Co-Digestion of Corn Stalk and Straw Depolymerization Wastewater

Biochar prepared from maize straw and molasses fermentation wastewater: application for soil improvement

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