Treatment of Mature Landfill Leachate by Chemical Precipitation and Fenton Advanced Oxidation Process

Environmental Health Engineering and Management Journal, Winter 2016; 3(1): 35–40

6 Pages Posted: 12 Jul 2017

See all articles by Nemat-allah Jaafarzadeh Haghighifard

Nemat-allah Jaafarzadeh Haghighifard

Environmental Technologies Research Center, Department of Environmental Health Engineering, School of Public Health, Ahvaz Jundishapur University of Medical Sciences

Sahand Jorfi

Environmental Technologies Research Center, Department of Environmental Health Engineering, School of Public Health, Ahvaz Jundishapur University of Medical Sciences

Mehdi Ahmadi

Environmental Technologies Research Center, Department of Environmental Health Engineering, School of Public Health, Ahvaz Jundishapur University of Medical Sciences

Samaneh Mirali

Department of Environmental Health Engineering, School of Health, Ahvaz Jundishapur University of Medical Sciences

Raheleh Kujlu

Department of Environmental Health Engineering, School of Health, Ahvaz Jundishapur University of Medical Sciences

Date Written: March 15, 2016

Abstract

Background: Mature landfill leachate is a complicated mixture which is resistant to biological treatment processes. The treatment of mature landfill leachate by struvite precipitation and Fenton oxidation was the main objective of the current research.

Methods: Struvite with the phosphate/ammonia/magnesium molar ratio of 1/1/1.05 was considered during all experiments. Five initial pHs of 3, 4, 5, 6, and 7, four different H2O2/Fe mass ratios of 50, 100, 200, and 400, and reaction times of 20, 40, 80, 120, and 160 minutes were examined for the Fenton oxidation process.

Results: A leachate sample with average chemical oxygen demand (COD), BOD5, and NH4 concentrations of 7350, 2220, and 2280 mg L-1, respectively, and a BOD5/COD ratio of 0.3 was introduced to the chemical precipitation unit. An NH4 removal efficiency of 87% was obtained at pH 8.5 for struvite precipitation. Under optimum conditions of Fenton oxidation, including pH 3, an H2O2/Fe2 mass ratio of 200, and a reaction time of 160 min, more than 95% COD and BOD5 removal was observed.

Conclusion: Struvite precipitation and Fenton oxidation are reliable and efficient alternatives for mature landfill treatment.

Keywords: Landfill, Leachate, Fenton oxidation, Chemical precipitation, Advanced oxidation

Suggested Citation

Jaafarzadeh Haghighifard, Nemat-allah and Jorfi, Sahand and Ahmadi, Mehdi and Mirali, Samaneh and Kujlu, Raheleh, Treatment of Mature Landfill Leachate by Chemical Precipitation and Fenton Advanced Oxidation Process (March 15, 2016). Environmental Health Engineering and Management Journal, Winter 2016; 3(1): 35–40. Available at SSRN: https://ssrn.com/abstract=2773187

Nemat-allah Jaafarzadeh Haghighifard

Environmental Technologies Research Center, Department of Environmental Health Engineering, School of Public Health, Ahvaz Jundishapur University of Medical Sciences ( email )

I.R.Iran
Mailbox: 159
Ahvaz, 61357-1579
Iran

Sahand Jorfi (Contact Author)

Environmental Technologies Research Center, Department of Environmental Health Engineering, School of Public Health, Ahvaz Jundishapur University of Medical Sciences ( email )

I.R.Iran
Mailbox: 159
Ahvaz, 61357-1579
Iran

Mehdi Ahmadi

Environmental Technologies Research Center, Department of Environmental Health Engineering, School of Public Health, Ahvaz Jundishapur University of Medical Sciences ( email )

I.R.Iran
Mailbox: 159
Ahvaz, 61357-1579
Iran

Samaneh Mirali

Department of Environmental Health Engineering, School of Health, Ahvaz Jundishapur University of Medical Sciences ( email )

I.R.Iran
Mailbox: 159
Ahvaz, 61357-1579
Iran

Raheleh Kujlu

Department of Environmental Health Engineering, School of Health, Ahvaz Jundishapur University of Medical Sciences ( email )

I.R.Iran
Mailbox: 159
Ahvaz, 61357-1579
Iran

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