Volume 8, Number 3 (12-2015)                   ijhe 2015, 8(3): 263-274 | Back to browse issues page


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Naddafi K, Nabizadeh R, Nasseri S, Yaghmaeian K, Koolivand A. Efficiency of in-vessel composting process in removal of petroleum hydrocarbons from bottom sludge of crude oil storage tanks. ijhe. 2015; 8 (3) :263-274
URL: http://ijhe.tums.ac.ir/article-1-5409-en.html

1- Professor of Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
2- Department of Environmental Health Engineering, Faculty of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
3- Associate Professor of Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
4- Assistant Professor of Department of Environmental Health Engineering, Faculty of Health, Arak University of Medical Sciences, Arak, Iran , akulivand@yahoo.com
Abstract:   (2932 Views)

Background and Objectives: Remaining of crude oil in storage tanks usually results in accumulating oily sludge at the bottom of the tank, which should be treated and disposed of in a suitable manner. The efficiency of in-vessel composting process in removing total petroleum hydrocarbons (TPH) from bottom sludge of crude oil storage tanks was investigated in the present study.

Material and methods: The sludge was mixed with immature compost at the ratios of 1:0 (as control), 1:2, 1:4, 1:6, 1:8, and 1:10 (as dry basis) with the initial C:N:P and moisture content of 100:5:1 and 55% respectively for a period of 10 weeks. The moisture adjustment and mixing process were done 3 times a day during the composting period. Sampling and analysis of TPH and pH were done every week and every two days, respectively.

Results: TPH removal in the 1:2, 1:4, 1:6, 1:8, and 1:10 composting reactors was 66.59, 73.19, 74.81, 80.20, and 79.91%, respectively. Thus, initial adjustment of sludge to immature compost ratios plays a great role in reduction of TPH. The results of the control reactors indicated that the main mechanism of TPH removal in the composting reactors was biological process.

Conclusions: In-vessel composting by addition of immature compost as amendment is a viable choice for bioremediation of the bottom sludge of crude oil storage tanks.

Full-Text [PDF 819 kb]   (1033 Downloads)    
Type of Study: Research | Subject: General
Received: 2015/02/9 | Accepted: 2015/09/19 | Published: 2015/12/23

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