Calcium peroxide pretreatment of waste activated sludge for enhancement of short chain fatty acids extraction from fermentation liquid by layered double hydroxides

Sheng, Liang; Ma, Xiao; Pan, Fanfeng; Liu, Jianyong; Li, Yu You

doi:10.1016/j.jclepro.2019.119067

Cited by 23 publications

(3 citation statements)

References 50 publications

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“…The techno‐economic assessment of ultrasonic hydrolysis acidification excess sludge as carbon source technology will be more conducive to the practical application of new technology. The excess sludge anaerobic fermentation broth pretreated with CaO 2 was used as an additional carbon source to treat a ton of wastewater, which required 0.9 RMB (Sheng, Ma, Pan, Liu, & Li, 2019). A simple calculation method in German ATV‐A131 standard is used to estimate the amount of added carbon source needed for denitrification.…”

Section: Resultsmentioning

confidence: 99%

Research on the enhanced biological nitrogen removal of wastewater by the ultrasound‐hydrolysis acidification of excess sludge

Wang

Liu

Tian

et al. 2020

Water Environment Research

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To simultaneously improve the removal of nitrogen and phosphorus from wastewater with a low C/N ratio and reduce excess sludge production, in this paper, excess sludge ultrasound‐hydrolysis acidification (UHA) pretreatment was coupled with the anaerobic–anoxic–oxic (AAO) process to provide carbon source and enhance biological nitrogen removal performance, and the experimental results can be summarized as follows. First, the total nitrogen (TN) concentrations in the effluent of the system decreased from 16.94 mg/L to 5.74 mg/L, and the removal rate of TN increased by 25.5%. In addition, the concentrations for ammonia nitrogen (NH3‐N) in the system decreased 12.59 mg/L, and the removal rate of this index increased by 29.0%. Furthermore, the specific oxygen uptake rate (SOUR) in the anoxic zone increased significantly because the application of UHA products enhanced the microbial activity, and the addition of UHA products had an effect on the microbial community structure in the system. The amounts of denitrifying bacteria such as Betaproteobacteria and Alphaproteobacteria also increased, which enhanced the nitrogen removal efficiency of wastewater biological treatment. Practitioner points Treatment of excess sludge in UHA device as an additional carbon source. Nitrogen removal efficiency was greatly improved after adding UHA products. Input of UHA products enhanced microbial activity in AAO system. Denitrifying bacteria increased with the addition of UHA products.

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Section: Resultsmentioning

confidence: 99%

Research on the enhanced biological nitrogen removal of wastewater by the ultrasound‐hydrolysis acidification of excess sludge

Wang

Liu

Tian

et al. 2020

Water Environment Research

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“…UHP effect and mechanisms are comparable to those reported for KMnO 4 : the established alkaline conditions, coupled with the free radicals generated, disrupted the organics in the sludge, thus increasing VFAs production up to 8800.9 mg COD L − 1 . Sheng et al [21] evaluated the influence of calcium peroxide in waste activated sludge acidogenic fermentation. Overall, calcium peroxide enhanced VFAs production up to 7471-7 mg COD/L, which was 1.5 times higher than the control test.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Production of Volatile Fatty Acids by Potassium Permanganate from Wasted Sewage Sludge: A Batch Test Experiment

Mineo¹,

Cosenza²,

et al. 2023

Preprint

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“…Anaerobic fermentation or digestion is currently the conventional method used for WAS treatment, during which sludge reduction, recovery of resources and energy (e.g., organic acids, H 2 , and CH 4 ), and environmental risk relief (e.g., inactivation of pathogenic microbes) can be simultaneously achieved. − However, in view of the protective effect of cell wall/membrane and EPS on sludge cells, organic substances contained in sludge are difficult to release from sludge, causing poor sludge solubilization, which is intensively recognized as the rate-determining step of anaerobic treatment of sludge . Moreover, concentrated toxic and hazardous substances in sludge are difficult to effectively biodegrade during numerous sludge treatments such as anaerobic digestion or fermentation. − For example, Golet et al found that only about 10% of norfloxacin was degraded during sludge anaerobic digestion.…”

Section: Introductionmentioning

confidence: 99%

Performance and Mechanism of Potassium Ferrate(VI) Enhancing Dark Fermentative Hydrogen Accumulation from Waste Activated Sludge

Kuang

Zhang

et al. 2020

ACS Sustainable Chem. Eng.

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Potassium ferrate (K2FeO4, PF), as a multifunctional green oxidant, has been used for oxidative degradation of pollutants and recovery of resources in sludge. However, its impact on the generation of hydrogen in anaerobic fermentation of waste activated sludge (WAS) is still unclear. The purpose of this work is to study the influence of PF on the dark fermentative hydrogen production. Experimental result suggested that as PF increased from 0 to 0.09 g/g of TSS (total suspended solids), the maximal hydrogen production increased from 1.47 to 8.35 mL/g VSS (volatile suspended solids). A further increase to 0.12 g/g of TSS resulted in a decrease in hydrogen yield. Mechanism studies revealed that that the addition of PF not only facilitated the disruption of sludge cell and extracellular polymeric substances (EPS) but also increased the proportion of biodegradable organics, providing more bioavailable organics for subsequent reactions involved in hydrogen accumulation. Although the activities of microorganisms relevant to dark fermentation were suppressed to a certain extent in the presence of PF, the induced suppression to hydrogen consumers was more severe. Microbial studies indicated that the relative abundances of hydrogen producers (such as Petrimonas and Proteiniborus) were augmented while hydrogen consumers (such as Methanosaeta and Methylocaldum) decreased in the presence of PF.

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Calcium peroxide pretreatment of waste activated sludge for enhancement of short chain fatty acids extraction from fermentation liquid by layered double hydroxides

Cited by 23 publications

References 50 publications

Research on the enhanced biological nitrogen removal of wastewater by the ultrasound‐hydrolysis acidification of excess sludge

Research on the enhanced biological nitrogen removal of wastewater by the ultrasound‐hydrolysis acidification of excess sludge

Enhancing the Production of Volatile Fatty Acids by Potassium Permanganate from Wasted Sewage Sludge: A Batch Test Experiment

Performance and Mechanism of Potassium Ferrate(VI) Enhancing Dark Fermentative Hydrogen Accumulation from Waste Activated Sludge

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