Alternative solutions for the bio-denitrification of landfill leachates using pine bark and compost

Journal of Hazardous Materials
Cristina TroisLaurent Oxarango

Abstract

Nitrified leachate may still require an additional bio-denitrification step, which occurs with the addition of often-expensive chemicals as carbon source. This study explores the applicability of low-cost carbon sources such as garden refuse compost and pine bark for the denitrification of high strength landfill leachates. The overall objective is to assess efficiency, kinetics and performance of the substrates in the removal of high nitrate concentrations. Garden refuse and pine bark are currently disposed of in general waste landfills in South Africa, separated from the main waste stream. A secondary objective is to assess the feasibility of re-using green waste as by-product of an integrated waste management system. Denitrification processes in fixed bed reactors were simulated at laboratory scale using anaerobic batch tests and leaching columns packed with immature compost and pine bark. Biologically treated leachate from a Sequencing Batch Reactor (SBR) with nitrate concentrations of 350, 700 and 1100 mgN/l were used for the trials. Preliminary results suggest that, passed the acclimatization step (40 days for both substrates), full denitrification is achieved in 10-20 days for the pine bark and 30-40 days for the compost.

References

Mar 22, 2002·Water Research·M I M Soares
Nov 8, 2002·Bioresource Technology·Ghasem D Najafpour, Cheong Poi Shan
Feb 25, 2006·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Raquel Barrena GómezAntoni Sánchez Ferrer
Feb 28, 2006·Waste Management·Cristina Trois, Andreas Polster
Jun 13, 2006·Waste Management·C H BensonJ M Rawe
Nov 13, 2007·Journal of Hazardous Materials·S RenouP Moulin

❮ Previous
Next ❯

Citations

Oct 4, 2014·Journal of Hazardous Materials·Xiao-Li YangMing-Qian Xia
Mar 11, 2016·Applied Microbiology and Biotechnology·Zhiqiang ShenJianlong Wang
Mar 15, 2016·Environmental Science and Pollution Research International·Qianyu HangZeying Hou
Oct 27, 2015·BioMed Research International·Juan Ramírez-GodínezGabriela Vázquez-Rodríguez
Mar 20, 2015·Environmental Science and Pollution Research International·Vaishali Ashok, Subrata Hait
Jun 1, 2017·Environmental Science and Pollution Research International·Jinlong LiShihai Deng
Oct 7, 2019·Journal of Applied Microbiology·Ankita RajtaPriyanka Pathania
Nov 2, 2019·International Journal of Environmental Research and Public Health·Qian ZhangTiantao Zhao
Sep 4, 2015·Environmental Science and Pollution Research International·Qian ZhangXiaoyi Xu

❮ Previous
Next ❯

Related Concepts

Related Feeds

Biofuels (ASM)

Biofuels are produced through contemporary processes from biomass rather than geological processes involved in fossil fuel formation. Examples include biodiesel, green diesel, biogas, etc. Discover the latest research on biofuels in this feed.

Bioremediation (ASM)

Bioremediation is the treatment and removal of harmful pollutants or contaminants through the use of microorganisms. Discover the latest research here.