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:: Volume 6, Issue 3 (Summer 2019) ::
Environ. health eng. manag. 2019, 6(3): 179-184 Back to browse issues page
An investigation of agricultural use potential of dewatered sewage sludge
Seyed Mostafa Aghili , Nasser Mehrdadi , Behnoush Aminzadeh , Mohammad Ali Zazouli
Corresponding author: Department of Environmental Engineering, School of Environment, College of Engineering, University of Tehran, Tehran, Iran , mostafa.aghili.iran@gmail.com
Abstract:   (686 Views)
Background: One of the useful applications of Dewatered sludge (DWS) of municipal wastewater treatment plants (WWTPs) is its use as manure in agriculture; therefore, its quality characteristics should be specified. The aim of this research was to determine biological and physicochemical characteristics of DWS of Sari WWTP and compare them with standards, and also to investigate its potential use in agriculture.
Methods: Sludge samples were taken from the sewage sludge of Sari WWTP. Sampling and analysis of samples parameters including fecal coliform, salmonella, helminth ova, carbon, nitrogen, C/N, phosphorus, organic matter, potassium, moisture, electrical conductivity, and PH, were performed during four seasons with three replications based on the standard method.
Results: The fecal coliform, salmonella, and helminth ova of the DWS were 2.37×106 ± 1.06×106 MPN/1 g d.s weight, 47±12.92 MPN/4 g d.s weight, and 466±61.85 number/4 g d.s weight, respectively, therefore, the DWS of Sari WWTP was categorized in the class B of the EPA standard. The amounts of C/N, organic matter, carbon, nitrogen, phosphorus, potassium, moisture, electrical conductivity, and PH were obtained to be 12.7±1.15, 42.4±3.27%, 24.6±1.89%, 1.94±0.13%, 2.35±0.6%, 0.57±0.13%, 82±3.12%, 1.34±0.21 ds/m, and 7.41± 0.45, respectively.
Conclusion: The DWS of Sari WWTP has a good fertility value but it cannot be safely used in agriculture and should be improved for class A by the Processes to Further Reduce Pathogens (PFRP), especially by composting.
Keywords: Sewage sludge, Agricultural use, Fertilizer, Pollution control, Dewatered sludge
eprint link: http://eprints.kmu.ac.ir/id/eprint/31541
Full-Text [PDF 349 kb]   (205 Downloads)    
Type of Study: Research | Subject: Special
Received: 2019/08/9 | Accepted: 2019/08/9 | Published: 2019/08/9
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Aghili S M, Mehrdadi N, Aminzadeh B, Zazouli M A. An investigation of agricultural use potential of dewatered sewage sludge. Environ. health eng. manag.. 2019; 6 (3) :179-184
URL: http://ehemj.com/article-1-514-en.html


Volume 6, Issue 3 (Summer 2019) Back to browse issues page
مجله مدیریت و مهندسی بهداشت محیط Environmental Health Engineering And Management Journal
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