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Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor

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Published on: October 15, 2015

Modelling PAHs removal in activated sludge process: effect of disintegration.

I Mozo¹, M Bounouba², E Mengelle²

¹LISBP, Université de Toulouse, CNRS, INRA, INSA, Toulouse, France E-mail: yolaine.bessiere@insa-toulouse.fr; TOTAL SA - CSTJF, Avenue Larribau, 64000 Pau, France.

Water Science and Technology : a Journal of the International Association on Water Pollution Research

|October 30, 2019

Summary

Sludge disintegration significantly enhances polycyclic aromatic hydrocarbons (PAHs) removal by increasing dissolved and colloidal matter (DCM), which improves PAH availability for degradation in wastewater treatment.

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Extraction of Structural Extracellular Polymeric Substances from Aerobic Granular Sludge

Extraction of Structural Extracellular Polymeric Substances from Aerobic Granular Sludge

Published on: September 26, 2016

Area of Science:

Environmental Science
Environmental Engineering
Biotechnology

Background:

Polycyclic Aromatic Hydrocarbons (PAHs) are persistent organic pollutants found in wastewater.
Activated sludge processes are commonly used for wastewater treatment but can be limited in PAH removal.
Sludge disintegration methods are being explored to enhance pollutant removal.

Purpose of the Study:

To evaluate the impact of sludge disintegration on PAH removal in activated sludge systems.
To investigate the role of dissolved and colloidal matter (DCM) in PAH removal after disintegration.
To develop a model for predicting PAH availability and degradation influenced by sludge disintegration.

Main Methods:

Utilized two laboratory-scale bioreactors, one with and one without a sonication disintegration system.
Performed mass balances to quantify PAH removal efficiencies.
Developed and applied a model to assess DCM content and its effect on PAH degradation.

Main Results:

Sludge disintegration significantly improved overall PAH removal, particularly for higher molecular weight PAHs.
Disintegration led to an increase in dissolved and colloidal matter (DCM) content.
The developed model effectively predicted improved PAH degradation trends and identified DCM as the primary driver.

Conclusions:

Sludge disintegration is an effective strategy for enhancing PAH removal in activated sludge.
Increased DCM following disintegration is the key factor improving PAH availability and apparent degradation.
The developed model provides valuable insights into the mechanisms of PAH removal enhancement.