Effect of operating conditions on the removals of pharmaceutical compounds from hospital wastewater in membrane bioreactor

Name: Sirilak Prasertkulsak

LCSH: Kasetsart University -- Dissertations. Ph.D.Eng. (Environmental Engineering) 2018

Classification :.LCCS: TD756

LCSH: Kasetsart University. -- Department of Environmental Engineering -- Dissertations

LCSH: Water -- Wase

LCSH: Sewage -- Purification -- Activated sludge process

LCSH: Sewage disposal

Abstract: This research investigated the effect of operating conditions on pharmaceutical compound removal in a membrane bioreactor (MBR). During the operation of pilotscale MBR at short hydraulic retention time (HRT), most of the pharmaceutical could be effectively removed. IBP, E2, TCS were found to be completely removed from the water phase whereas moderate removals of SMX, TMP, and NPX were observed during initial operation period. Their removals were mainly through adsorption of compounds onto colloidal suspension in the supernatant followed by membrane separation. In the laboratory-scale MBR, the removal efficiencies of pharmaceutical compounds varied depending on their properties. At HRT of 6 h, the removal efficiencies of pharmaceutical compounds were improving with increasing solid retention time (SRT) from 15 days to infinite (no sludge wastage) condition. A minimum SRT for effective removals of pharmaceutical compounds was found to be 30 days. Moreover, the removal efficiencies of pharmaceutical compounds at a shorter HRT of 3 h was found at higher extent (>80%) for DCF, TMP, NPX, IBP, and TCS while CBZ was poorly removed (<40%). In this study, adsorption onto coarse particle (>0.45 µm) was the major mechanism responsible for the removal of hydrophobic compounds in mixed liquor while adsorption onto fine and gel-like substances (1 kDa- 0.45 µm) contributed significantly to the removals of hydrophilic and moderate hydrophobic compounds. Finally, an operation of MBR at high sludge concentrations under long SRT condition helped enhancing the removal of pharmaceutical compounds via adsorption onto coarse and fine sludge particles.

Kasetsart University. Office of the University Library

Address: Bangkok

Email: tdckulib@ku.ac.th

Name: Chart Chiemchaisri

Role: Thesis Advisor

Name: Wilai Chiemchaisri

Role: Thesis CO-Advisor

Created: 2018

Modified: 2025-07-09

Issued: 2025-07-09

วิทยานิพนธ์/Thesis

application/pdf

URL: https://www.lib.ku.ac.th/KUthesis/2561/sirilak-pra-all.pdf

CallNumber: TD756 .S57

eng

DegreeName: Doctor of Engineering

Level: Doctoral Degree

Descipline: Environmental Engineering

Grantor: Kasetsart University

©copyrights Kasetsart University

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