Universiti Teknologi Malaysia Institutional Repository

Performance of an up-flow anaerobic sludge bed (UASB) reactor treating landfill leachate containing heavy metals and formaldehyde

Selvam, Sivathass Bannir and Chelliapan, Shreeshivadasan and Md. Din, Mohd. Fadhil and Shahperi, Rafidah and Mohd. Aris, Maizatul Asnie (2015) Performance of an up-flow anaerobic sludge bed (UASB) reactor treating landfill leachate containing heavy metals and formaldehyde. In: The 2nd IWA Malaysia Young Water Professionals Conference (YWP15), 17-20 Mac, 2015, Kuala Lumpur, Malaysia.

[img]
Preview
PDF
293kB

Abstract

Municipal Solid Waste (MSW) landfill leachate is a serious environmental issue and treated using various methods, mostly involving biological treatment. In the present study, an up-flow anaerobic sludge bed (UASB) was used for the treatment of matured landfill leachate that contains heavy metals (As, Fe, Ni, and Cd) and Formaldehyde (FA). Accordingly, the OLR to the UASB reactor was gradually increased from 0.125 to 2.5 kg CODm-3d-1, to observe the process performance. The process performance of the reactor was characterized in terms of pH, Chemical Oxygen Demand (COD) removal, Total Volatile Acid (TVA) production, Mixed Liquor Suspended Solids (MLSS), Mixed Liquor Volatile Suspended Solids (MLVSS) washout, and Methane composition. Results showed that at a Hydraulic Retention Time (HRT) of 4 days and an OLR of 0.125 kg CODm-3d-1, up to 79.04% COD removal efficiency was observed. However, when the OLR was increased gradually from 0.375 to 2.5 kg CODm-3d-1, the COD removal efficiency decreased to 9.5%, suggesting that the high accumulation of heavy metals may have inhibited the methanogens. During this period, the heavy metal and formaldehyde concentration were 9.40, 0.43, 0.50, 12.80 and 8.60 mgL-1 respectively.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:heavy metals, formaldehyde
Subjects:S Agriculture > S Agriculture (General)
Divisions:Razak School of Engineering and Advanced Technology
ID Code:61557
Deposited By: Widya Wahid
Deposited On:25 Apr 2017 12:36
Last Modified:06 Aug 2017 08:59

Repository Staff Only: item control page