Effect of ozone and ozone/persulfate processes on biodegradable and soluble characteristics of semiaerobic stabilized leachate

Significance Statement

This is the first time to utilize ozone in the activation of persulfate during oxidation of stabilized leachate, as the current knowledge and applications used for persulfate activation like Heat, UV, Iron ions and high pH value. The new activation method (O₃/ S₂O₈^2-) improved the oxidation potential of persulfate towards degradation organics and removing of ammonia. Furthermore, the new process improved the quality of treated effluent by enhanced the biodegradable and soluble characteristics of stabilized leachate and suggest the application of biological treatment as a post-treatment process

Acknowledgement

This work is funded by Universiti Sains Malaysia under Iconic grant scheme (Grant no. 1001/CKT/870023) for research associated with the Solid Waste Management Cluster, Engineering Campus, Universiti Sains Malaysia.

Figure 1: Schematic diagram of ozone equipment and experiments procedures.

Journal Reference

Environmental Progress & Sustainable Energy. Volume 33, Issue 1, pages 184–191, 2014.

Salem S. Abu Amr¹, Hamidi Abdul Aziz²*, Mohd Nordin Adlan¹, Jaber M. A. Alkasseh¹

¹School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 NibongTebal, Penang, Malaysia

² Solid Waste Management Cluster, Engineering Campus, Universiti Sains Malaysia, 14300 Penang, Malaysia

ABSTRACT

This study investigated the effects of O₃ and O₃/S₂O₈²⁻ in the advanced oxidation process (AOPs) on the biodegradable and soluble characteristics of semiaerobic stabilized solid waste leachate. The biodegradability (BOD₅/COD) ratio improved from 0.034 to 0.05 and 0.29 following O₃ and O₃/ S₂O₈²⁻, respectively. Fractions of biodegradable COD_(bi) (24%), nonbiodegradable COD_(ubi) (76%), soluble COD_(s) (59%), biodegradable soluble COD_(bsi) (38%), nonbiodegradable soluble COD_(ubsi) (62%), and particulate COD (PCOD) (41%) in stabilized leachate were also investigated. The fraction of COD _(bi) increased to 28 and 39% after applying O₃ and O₃/ S₂O₈²⁻ in AOPs, respectively. COD_(S) increased to 65 after O₃ and to 72% after O₃/AOPs, whereas COD _(bsi) increased to 38 and 55% after O₃ and O₃/AOPs, respectively. The removal efficiency of total COD was obtained at 15 after O₃alone and improved to 72% following ozone-based AOPs, whereas PCOD reduced from 41 to 35 after O₃ and 28% after ozone-based AOPs. Ozone/Prsulfate is an efficient method for degradation of stabilized leachate, enhanced biodegradability and improved biodegradable and soluble characteristics of stabilized leachate. © 2013 American Institute of Chemical Engineers.

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*Corresponding author: Dr. Hamidi Abdul Aziz

Tel: + 60-45996215;

Fax: +60-45941009.

E-mail: [email protected]

Advances in Engineering Advances in Engineering features breaking research judged by Advances in Engineering advisory team to be of key importance in the Engineering field. Papers are selected from over 10,000 published each week from most peer reviewed journals.

Effect of ozone and ozone/persulfate processes on biodegradable and soluble characteristics of semiaerobic stabilized leachate

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