Activation of nitrite by freezing process for anaerobic digestion enhancement of waste activated sludge: Performance and mechanisms

Liu, Xuran; Huang, Xiaoding; Wu, Yanxin; Xu, Qiuxiang; Du, Mingting; Wang, Dongbo; Yang, Qi; Liu, Yiwen; Ni, Bing‐Jie; Yang, Guojing; Yang, Fan; Wang, Qilin

doi:10.1016/j.cej.2020.124147

Cited by 72 publications

(14 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This finding is similar with former study on FT pretreated peanut shell (Qi et al 2020 Under the same experimental condition of freezing temperature, the enzymatic hydrolysis efficiency of hemicellulose exhibits the similar trend as cellulose, which is up and down as the function of freezing time while still higher than untreated WS. Considering the slight decline in the enzymatic hydrolysis efficiency of cellulose and hemicellulose at severity stage, the possible reason is that, the damage in freezing stage causes soluble organics releasing in the liquid phase and washed away in thawing stage (Liu et al 2020). Though, the influence on the increase of efficiency and the variation trend of rise then descent is similar, there exists some differences.…”

Section: Enzymatic Hydrolysismentioning

confidence: 99%

“…Freeze-thawing pretreatment is an efficient mechanical method leading to the disruption of biomass (Liu et al 2020), thus an increase in cellulose accessibility. Water converts into ice front which acts as a cutting tool causing the damage of biomass structure.…”

Section: Introductionmentioning

confidence: 99%

“…Though, freeze-thawing pretreatment is confirmed that it can be performed on several kinds of biomass such as waste activated sludge, food waste and microalgal biomass for energy production (Gruber-Brunhumer et al 2016;Karthikeyan et al 2018;Liu et al 2020). And has advantages of no chemical additives, no inhibition generation and no pollution.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Enhanced the Efficiency of Enzymatic Hydrolysis on Wheat Straw via Freeze-thawing Pretreatment

Sun¹,

Deng

Li³

et al. 2021

Preprint

View full text Add to dashboard Cite

This research was investigated to enhance the efficiency of enzymatic hydrolysis on wheat straw via freeze-thawing pretreatment, and to find the physicochemical structural changes after this pretreatment. Results show that, this pretreatment enhances the enzymatic hydrolysis efficiency of cellulose and hemicellulose, and hemicellulose is more susceptible to this pretreatment. The highest enzymatic hydrolysis efficiency of cellulose and hemicellulose was 57.06% and 70.66% occurred on -80℃, 24 h and -10℃, 24 h pretreated samples, with an improvement of 2.23 and 3.13 folds of control. SEM images exhibited that transverse cracks appeared before longitudinal cracks as pretreated conditions aggravated, and holes can be found on every sample after this pretreatment. FTIR and XRD analysis implied that freeze-thawing pretreatment had effect both on the crystalline and amorphous regions, and disrupted the hydrogen bonds among them. This study provided a physical pretreatment method to improve the efficiency of enzymatic hydrolysis on wheat straw.

show abstract

Section: Enzymatic Hydrolysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhanced the Efficiency of Enzymatic Hydrolysis on Wheat Straw via Freeze-thawing Pretreatment

Sun¹,

Deng

Li³

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Besides, some pretreatments of WSS have been studied for enhancement of methane production. For instance, the thermal-alkaline (Liu et al 2019) and nitrite-based (Liu et al 2020) pretreatments have assisted the disruption of sludge flocs thus improved the release of biodegradable organic matter as substrates to be further utilized in anaerobic digestion process, in which methane production can be improved. In addition, some studies report that some of the Gram-positive bacteria may have a negative impact on methane fermentation using WSS.…”

Section: Introductionmentioning

confidence: 99%

Effect of Aso limonite on anaerobic digestion of waste sewage sludge

2020

View full text Add to dashboard Cite

The effect of Aso volcanic limonite was explored in anaerobic digestion using waste sewage sludge (WSS). In this study, methane and hydrogen sulfide were remarkably inhibited when Aso limonite was mixed with WSS as well as a significant reduction of ammonia. Although pH was lowered after adding Aso limonite, methane was still inhibited in neutralized pH condition at 7.0. Hydrolysis stage was not influenced by Aso limonite as supported by the result that a high protease activity was still detected in the presence of the material. However, acidogenesis stage was affected by Aso limonite as indicated by the different productions of organic acids. Acetic acid, was accumulated in the presence of Aso limonite due to the inhibition of methane production, except in the highest concentration of Aso limonite which the production of acetate may be inhibited. Besides, the production of propionate and butyrate reduced in accordance to the increased concentration of Aso limonite. In addition, Archaeal activity (methanogens) in WSS with Aso limonite was low in agreement with the low methane production. Thus, these results indicate that Aso limonite influences the acidogenesis and methanogenesis processes, by which the productions of methane and ammonia were inhibited. On the other hand, in the contactless of Aso limonite during the anaerobic digestion of WSS (Aso limonite was placed in the area of headspace in the vial), Aso limonite had the adsorptive ability for hydrogen sulfide from WSS, but not for methane. This contactless system of Aso limonite may be a practical means to remove hydrogen sulfide without inhibiting methane production as an important bioenergy source. Publisher's NoteSpringer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

show abstract

“…Among newer methods, freezing activated nitrite‐based pretreatment has been shown to be effective in improving the efficiency of anaerobic digestion of WAS (Liu et al ., 2020a). In addition, alkaline fermentation using sulphite has been shown to enhance the production of short‐chain fatty acids and aid in sludge settling (Liu et al ., 2020b). Moreover, thermal hydrolysis at temperatures of 170°C was used to sterilize Microthrix Parvicella on full‐scale (2014) (Alfaro et al ., 2014).…”

Section: Introductionmentioning

confidence: 99%

Effect of waste activated sludge pretreatment methods to mitigate Gordonia foaming potential in anaerobic digestion

Garg

Stensel

Bucher

et al. 2020

Water & Environment J

View full text Add to dashboard Cite

In this study, waste activated sludge obtained from two full‐scale treatment plants with foaming issues was pretreated with acid/alkali treatment, acid‐phase fermentation, thermal treatment, ultrasonic treatment and metal salt treatment to investigate their effect on foam mitigation. Waste activated sludge was characterized for foaming index prior and after each pretreatment method. Among all pretreatment methods investigated, acid/alkali treatment and acid phase fermentation showed highest reduction of 53% in foaming and in inactivation of Gordonia amarae filaments. Pretreatment methods that resulted in sharp decrease in the foaming index concurred with higher amounts of dead foam formers as confirmed using live/dead staining and the PMA‐qPCR technique. Pretreating with iron(III)chloride gave good foaming reductions with 54% decrease in foaming potential at a concentration of 260 mg/L but did not result in a decline of foam formers as confirmed by live/dead staining. Ultrasonic treatment did not prove effective in lowering the foaming index or killing the G. amarae filaments.

show abstract

Activation of nitrite by freezing process for anaerobic digestion enhancement of waste activated sludge: Performance and mechanisms

Cited by 72 publications

References 40 publications

Enhanced the Efficiency of Enzymatic Hydrolysis on Wheat Straw via Freeze-thawing Pretreatment

Enhanced the Efficiency of Enzymatic Hydrolysis on Wheat Straw via Freeze-thawing Pretreatment

Effect of Aso limonite on anaerobic digestion of waste sewage sludge

Effect of waste activated sludge pretreatment methods to mitigate Gordonia foaming potential in anaerobic digestion

Contact Info

Product

Resources

About