Iran Occupational Health Journal
سلامت كار ايران
ioh
Medical Sciences
http://ioh.iums.ac.ir
136
journal136
1735-5133
2228-7493
10.61186/ioh
fa
jalali
1387
1
1
gregorian
2008
4
1
5
1
online
1
fulltext
fa
بررسی تجزیه فرمآلدهید با کمک میکروارگانیسم های جدا شده از فاضلاب صنایع شیمیایی
Investigation of formaldehyde degradation by using isolated microorganisms from waste water of chemical industries
ایمنی
Safety
پژوهشي
Research
<p align="right">چکیده</p>
<p> <strong> Background and aims </strong></p><p> <strong> </strong>Formaldehyde is one of hazardous compounds that may be found in waste water of different industries. This compound is toxic and biodegradation of it is difficult. The aim of this study is determination of efficiency of isolated microorganisms from polluted effluents by formaldehyde in aerobic and suspended and attached growth. </p><p> <strong> Methods </strong></p><p> <strong> </strong>In this study formaldehyde degrading microorganisms were separated from waste water and soil in a chemical industry. Then microorganisms were isolated and separated by using special culture medias. 12 microorganisms were separated and used for biodegradation of formaldehyde. Standard method was used to evaluated of degradation value. </p><p> <strong> Results </strong></p><p> The results showed that pseudomonas aeruginosa was the most effective microorganisms. COD removal efficiency of pseudomonas aeruginosa was 85% in suspended growth and 83% in attached growth condition. Also removal kinetic parameters were calculated That μmax, K, Y, Ks and Kd coefficients were 1.44 l/d , 3.28 mg COD/mg MLSS.day, 0.44 28 mg COD/mg MLSS. day, 1.36 mg/l and 0.04 l/day respectively. </p><p> <strong> Conclusion </strong></p><p> Using aerobic conditions in this study to degrade formaldehyde and acceptable output reduction in the COD can be the advantages of aerobic exercises method in comparison with anaerobic exercises. </p>
فرمآلدهید ، تجزیه بیولوژیکی ، رشد چسبیده و معلق ، صنایع شیمیایی
Formaldehyde, biological degradation, suspended and attached growth, Chemical industries
47
54
http://ioh.iums.ac.ir/browse.php?a_code=A-10-3-14&slc_lang=fa&sid=1
A.
Joneidi
احمد
جنیدی جعفری
moc.oohay@idinoj_damha
1360031947532846004175
1360031947532846004175
Yes
IranUniversity of MedicaSciences, Tehran, Iran.l
A.
Talaee
امیر رضا
طلایی
1360031947532846004176
1360031947532846004176
No
Faculty member of Civil Engineering of Jami Institute
S.
Jofee
سهند
جوفی
1360031947532846004177
1360031947532846004177
No
Faculty member of Civil Engineering of Jami Institute
M.M.
Mehrabaniardakani
محمد مهدی
مهربانی اردکانی
1360031947532846004178
1360031947532846004178
No
Iran University of Medical Sciences, Tehran, Iran.