Environmental Health Engineering and Management Journal
Environmental Health Engineering and Management Journal
Environ. Health Eng. Manag.
Medical Sciences
http://ehemj.com
1
admin
2423-3765
2423-4311
8
7
14
8888
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en
jalali
1398
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1
gregorian
2019
8
1
6
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online
1
fulltext
en
An investigation of agricultural use potential of dewatered sewage sludge
تخصصي
Special
مقاله اصیل
Original Article
<div style="text-align: justify;"><span class="fontstyle0">Background: </span><span class="fontstyle2">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.</span><br>
<span class="fontstyle0">Methods: </span><span class="fontstyle2">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.</span><br>
<span class="fontstyle0">Results: </span><span class="fontstyle2">The fecal coliform, salmonella, and helminth ova of the DWS were 2.37×10</span><span class="fontstyle2" style="font-size:5pt;">6 </span><span class="fontstyle2">± 1.06×10</span><span class="fontstyle2" style="font-size:5pt;">6</span><span class="fontstyle2"> 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.</span><br>
<span class="fontstyle0">Conclusion: </span><span class="fontstyle2">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.</span></div>
Sewage sludge, Agricultural use, Fertilizer, Pollution control, Dewatered sludge
179
184
http://ehemj.com/browse.php?a_code=A-10-407-9&slc_lang=en&sid=1
Seyed Mostafa
Aghili
mostafa.aghili.iran@gmail.com
10031947532846005550
10031947532846005550
Yes
Corresponding author: Department of Environmental Engineering, School of Environment, College of Engineering, University of Tehran, Tehran, Iran
Nasser
Mehrdadi
mehrdadi@ut.ac.ir
10031947532846005551
10031947532846005551
No
Department of Environmental Engineering, School of Environment, College of Engineering, University of Tehran, Tehran, Iran
Behnoush
Aminzadeh
bamin@ut.ac.ir
10031947532846005552
10031947532846005552
No
Department of Environmental Engineering, School of Environment, College of Engineering, University of Tehran, Tehran, Iran
Mohammad Ali
Zazouli
Mzazouli@mazums.ac.ir
10031947532846005553
10031947532846005553
No
Department of Environmental Health Engineering, School of Health and Health Sciences Research Center, Mazandaran University of Medical Sciences, Sari, Iran