Oxidation method using H2O2 on leachate from wastewater treatment plant inlet of Bantargebang integrated waste processing unit

Abstract

Leachate produced from old landfills has a low level of biodegradability making it suitable for physico-chemical treatment. Low level of biodegradability is characterized by a concentration ratio of BOD5/COD ≤ 0.1. The leachate at the Bantargebang Integrated Waste Management Unit (UPST) has a BOD5/COD concentration ratio of 0.05. The current state of processing leachate at a wastewater treatment plant (IPAS) employs biological processing technology. This research uses inlet leachate from IPAS 3 UPST Bantargebang, with a batch system reactor. The reactor is a glass beaker with capacity of 1 L, operated using a magnetic stirrer with a stirring speed of 200 rpm. The reactor is covered with aluminum foil to prevent oxidation caused by light. The dosage used is based on H2O2/COD concentration ratios, which are 1.0625 and 2.125. Reactions time applied are 60 minutes and 180 minutes. The initial pH levels of the leachate used are 5, 6, 7 and 8. The variations which has optimum values are at pH 6, H2O2/COD 2.125, and a 60-minutes reaction time, resulting in average color removal, BOD5, COD, TSS, TN, and H2O2 reacted by 65%.