Investigation of organic and nitrogen removals from municipal solid waste landfill leachate in two-stage membrane bioreactor under different conditions

Name: Heang, Ngech Horng

LCSH: Kasetsart University -- Theses. M.Eng. (Environmental Engineering) 2019

Classification :.LCCS: TD795

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

LCSH: Refuse and refuse disposal

LCSH: Waste disposal in the ground

LCSH: Sanitary landfills

LCSH: Waste disposal

Abstract: Organic and nitrogen removals in two-stage membrane bioreactor (2-stage MBR) applied to the treatment of mixed and partially stabilized leachate at different concentrations were investigated. A pilot-scale 2-stage MBR system was operated at different hydraulic retention time of 2.5 and 1 days during which organic loading rates were varied between 1.5 and 11.8 kg BOD/m3 d. The effect of Alcaligenes faecalis No.4 bio-augmentation and its survival during the treatment was examined. The results of batch tests determined the maximum capacity in removing organic and nitrogen by various organic concentration and also the effect of volatile fatty acid on the growth of Alcaligenes faecalis No. 4 under anoxic and aerobic conditions. High organic and nitrogen removals (>90%) was achieved when the system was applied to mixed leachate with BOD/COD of 0.5- 0.76 but the removals of COD, TKN was reduced to 58-70% and Alcaligenes faecalis No. 4 population became extinct when partially stabilized leachate was pre-treated and reduced its BOD/COD to 0.11. The batch tests showed that in the mixed culture achieved higher removal than non-bioaugmentation with Alcaligenes faecalis No. 4 in both conditions. Though, low volatile fatty acid substrate indicated a huge impact on the activity of Alcaligenes faecalis No 4 as this bacterium showed no increase after 48h of observation. This study demonstrates the applicability of 2-stage MBR to the treatment of leachate with varied characteristics provided that its treatment conditions were properly adjusted. Notwithstanding, the limitation of organic acid substrate could limit the activity of Alcaligenes faecalis No. 4.

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: 2019

Modified: 2025-07-07

Issued: 2025-07-07

วิทยานิพนธ์/Thesis

application/pdf

URL: https://www.lib.ku.ac.th/KUthesis/2562/heang-nge-all.pdf

CallNumber: TD795 .H42

eng

DegreeName: Master of Engineering

Level: Master's Degree

Descipline: Environmental Engineering

Grantor: Kasetsart University

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