Pretreatment of fresh leachate by ultraviolet light (UV) oxidationhydrogen peroxide (H2O2)

Name: Sommai Pothong

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

Classification :.LCCS: TD795.7

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

LCSH: Leachate

LCSH: Leachate -- Purification

LCSH: Ultraviolet radiation

LCSH: Hydrogen peroxide -- Oxidation

Abstract: The pre-separation of solid waste of Sai Mai Transfer Station, Bangkok Metropolitan Administration produces leachate around 40 m3 per day. The leachate is currently drained into the storage sump and mixed with truck washing water, around 200 m3 per day, before transferred to the biological wastewater treatment system. This study investigated the possibility of using ultraviolet Light (UV)/Hydrogen Peroxide (H2O2) for fresh leachate pretreatment to reduce the organic loading to the biological wastewater treatment system that is already operated at full capacity. At present, the reduction of organic loading by 15% to 30% is needed. The tests were conducted in a 2.5 liter batch reactor equipped with a 40 Watts UV using diluted leachate prepared from fresh leachate that was diluted 5 times with fresh water. The initial BOD and COD of the diluted leachate were approximately 10,000 and 15,000 mg/L, respectively. The effects of pH and hydrogen peroxide were investigated at initial pH of 4, 7, and 10 and 0.3%, 1.5% and 3% of H2O2 solution. The results showed that the best condition for COD removal efficiency was up to 20% for pretreatment using initial pH of 4 with 1.5% H2O2 at 1 day contact time and COD removal increased to 70% at the low pH control (pH 4) when H2O2 increased to 3% at 5 days contact time. The most efficient combination for color removal was 3% of UV/H2O2 at pH 4, also provided more complete ADMI color removal from 92 to 21 ADMI color units (77.2%). The result show the lower pH or acidic condition was better to eliminate organic matter and color. Therefore, this system configuration showed potential to be used as pretreatment of the leachate in terms of organic loading reduction.

Kasetsart University. Office of the University Library

Address: Bangkok

Email: tdckulib@ku.ac.th

Name: Sanya Sirivithayapakorn

Role: Thesis Advisor

Created: 2019

Modified: 2025-07-04

Issued: 2025-07-04

วิทยานิพนธ์/Thesis

application/pdf

URL: https://www.lib.ku.ac.th/KUthesis/2562/sommai-pot-all.pdf

CallNumber: TD795.7 .S66

eng

DegreeName: Master of Engineering

Level: Master's Degree

Descipline: Environmental Engineering

Grantor: Kasetsart University

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