The effect of pre-treatment and anaerobic digestion for pathogens reduction in agricultural utilization of sewage sludge

Environmental Science and Pollution Research, Journal Year: 2022, Volume and Issue: 30(5), P. 13801 - 13810

Published: Sept. 23, 2022

The aim of the research work was to explain possibilities application waste activated sludge (WAS) pretreatment processes prior anaerobic digestion (mesophilic fermentation). Hydrodynamic disintegration and freezing/thawing methods were used. Based on microbiological parasitological analyses, a significant decrease in pathogenic bacteria, coliphages, parasite eggs observed. number bacteria analyzed (Salmonella sp., Escherichia coli, Clostridium perfringens) coliphages reduced from 19.3to 42.3% after hydrodynamic cavitation. A similar effect achieved for destruction by with dry ice between 7.8 14.9%. effectiveness reduction (Ascaris Trichuris Toxocara sp.) these ranged 10.7 29.3%. highest results observed hybrid method (hydrodynamic cavitation + disintegration) caused synergistic effect. Salmonella sp. 1 gd.w. about 69.7%, E. coli 70.0%, perfringens 38.4%, 48.2%. Disruption WAS led helminth Ascaris (63.8%), (64.3%), (66.4%). After under mesophilic conditions, an additional bacterial pathogens introduction disintegrated fermentation chamber resulted higher efficiency (from 23%) comparison control sample (70%WAS 30%DS (inoculum-digested sludge)).

Language: Английский

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NaGdF₄:Yb,Er@ZIF‐8/MnO₂ for photocatalytic removal of organic pollutants and pathogenic bacteria

EcoMat, Journal Year: 2023, Volume and Issue: 6(1)

Published: Dec. 3, 2023

Abstract In the field of environmental science, efficient removal organic pollutants and pathogenic bacteria from wastewater using a photocatalytic process that responds to full spectrum sunlight is crucial. this study, highly effective nanoheterojunction called NaGdF 4 :Yb,Er@zeolitic imidazolate framework‐8/manganese dioxide (NaGdF :Yb,Er@ZIF‐8/MnO 2 , UCZM) was synthesized. This exhibits remarkable ability respond entire range ultraviolet, visible, infrared light. Under simulated sunlight, UCZM demonstrated outstanding performance in degrading malachite green dye, with degradation efficiency 92.6% within 90 min. Moreover, completely inactivated both Staphylococcus aureus Escherichia coli 20 min under sunlight. Mechanistic studies revealed :Yb,Er played crucial role activating ZIF‐8 MnO through Förster resonance energy transfer, facilitating process. The formation Z‐type heterojunction promoted separation photogenerated carriers. Furthermore, exhibited excellent biosafety properties. study represents first exploration composite material composed UCNPs, ZIF‐8, for applications. findings highlight potential novel design, which spectral response, tackling water pollution inactivation bacteria. image

Language: Английский

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Ultrasonication as anaerobic digestion pretreatment to improve sewage sludge methane production: Performance and microbial characterization

Journal of Environmental Sciences, Journal Year: 2023, Volume and Issue: 146, P. 15 - 27

Published: May 1, 2023

Language: Английский

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Advances, challenges, and prospects in microalgal-bacterial symbiosis system treating heavy metal wastewater

Chemosphere, Journal Year: 2023, Volume and Issue: 345, P. 140448 - 140448

Published: Oct. 13, 2023

Language: Английский

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Antibacterial performance of cationic quaternary phosphonium-modified chitosan polymer in water

Chinese Chemical Letters, Journal Year: 2023, Volume and Issue: 35(9), P. 109406 - 109406

Published: Dec. 19, 2023

Language: Английский

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In-situ rapid cultivation of aerobic granular sludge in A/O bioreactor by using Ca(ClO)2 pretreating sludge

Bioresource Technology, Journal Year: 2024, Volume and Issue: 410, P. 131278 - 131278

Published: Aug. 14, 2024

Language: Английский

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Combustion characteristics and NOx release of sludge combustion with coal in a 660 MW boiler

Applied Thermal Engineering, Journal Year: 2024, Volume and Issue: 258, P. 124749 - 124749

Published: Nov. 4, 2024

Language: Английский

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Assessment of the Effects of Temperature and Time on the Bacteriological Quality and Heavy Metal of Digestate as a Safe Biofertiliser

Geomicrobiology Journal, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 8

Published: Jan. 8, 2025

The chemical composition and microbial diversity influence the safety, quality utility of digestate. This study investigated minimum temperature time for conversion digestate to a safe biofertilizer. Digestate, byproduct anaerobic digestion was treated at various temperatures, 28 ± 2, 55, 60, 70 80 °C varying durations, 0, 20, 30, 40 60 minutes. potential rhizobacteria examined essentially, min bacterial counts were 8.05 0.71 × 102 cfu/ml less than 1000 permissible limits. At this time, there no recorded Salmonella or Escherichiae. Identified species Pseudomonas sp, Proteus spp., Enterobacter sp., Escherichia coli, Citrobacter Klebsiella Enterococcus Streptococcus Bacillus Yersinia sp Shigella sp. Physicochemical result suggests that processed mins possess pH, total nitrogen, nitrate phosphorus within defined standards while heavy metal concentration below rhizobacterial screening showed tested positive phosphate solubilization, nitrogen fixation, ammonia production induction indole acetic acid. Overall, may be successfully deployed as biofertilizer when suitable enhance plant growth.

Language: Английский

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Bioaerosols dispersed from a typical wastewater treatment plant with a membrane bioreactor: Emission characteristics, source analysis and health risk

Process Safety and Environmental Protection, Journal Year: 2022, Volume and Issue: 160, P. 976 - 987

Published: March 5, 2022

Language: Английский

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Sewage sludge treated with bentonite, vermiculite or biochar can improve soil properties and enhance growth of grasses

Soil Use and Management, Journal Year: 2023, Volume and Issue: 39(4), P. 1403 - 1421

Published: June 16, 2023

Abstract Sewage sludge treated with 15% bentonite, vermiculite or biochar was evaluated as a soil amendment in comparison to limed and untreated sludge. Seven treatments were established two soils, an acid alkaline, three replications, i.e. 2% addition of vermiculite, lime application sludge, inorganic fertilization no fertilizers (control). Then, the used pot experiment perennial ryegrass ( Lolium perenne L.) test plant. Sludge clay minerals improved pH significantly increased organic matter available nutrients both soils compared control. Although salinity sodicity hazard evidenced, initial alkaline by four‐eight two‐three times, respectively, upon all treatments, especially that Moreover, zinc (Zn) times. Soil total aboveground biomass yield 133%–171% 72%–88%, control enhanced nutrient uptake plants. Furthermore microbial metabolic quotient indicated lack low heavy metal stress soil. After harvests ryegrass, residual effect on salinity, phosphorus (P), Zn boron (B) still persisted. Thus sewage could be applied at rate (≈80 Mg ha −1 ) serve fertilizer for grasses pasture species; however, caution is needed regarding possible P build‐up, phytotoxicity salinization risks.

Language: Английский

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