Investigation of Coagulation and Clotting Process of Purge of Environmental Pollutants of Paper Mill’s Wastewater

Subject Areas : environmental management

noshin birjandi ¹ , Habibollah Yonesi ² , Nader Bahramifar ³ , Mojtaba hadavifar ⁴

1 - کارشناس ارشد مهندسی منابع طبیعی- محیط زیست، دانشگاه تربیت مدرس.
2 - Associated Professor, Department of Natural Resources and Environment, Tarbiat Modares University
3 - Assistant Professor, Department of Natural Resources and Environment, Tarbiat Modares University
4 - PhD Student. Department of Environmental Science, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University

Received: 2011-07-09 Accepted : 2011-11-03 Published : 2014-12-22

Keywords: Paper mill wastewater, Environmental Pollutants, Coagulant, PACL, COD, Turbidity,

Abstract :

Introduction: Paper mill’s wastewater is the most pollutant industrial wastewaters. Theeffluent causes production sludge, scum formation and loss of aesthetic beauty in theenvironment. They also increase the amount of toxic substances in the water which causesdeath to the zooplankton and fish.Material and methods: The present research investigated the effect of coagulant of PACLfor reduction of the pollutants in paper mill wastewater. For reduction of the pollutants thequantity and quality of wastewater investigated.Results: This study showed that this wastewater has chemical oxygen demand (COD) =3523mg/l and turbidity= 872. In this test, parameters of turbidity, COD, total solid (TS), optimumpH and dosage of coagulant determined. According to data obtained from studies optimumpH and dosage of PACL were obtained to be 7, 785 mg/l, respectively.Conclusion: The results of the present study revealed that coagulant of PACL could reduce90% of TS, 88% of COD and 93% of turbidity in paper mill wastewater

References:

1.  1.      قدبنان، شعبان، چالکش امیری، محمد و مؤیدی خسرو­شاهی، حسین؛ بررسی اثر منعقدکننده­های فلزی بر روی انعقاد و لخته­سازی آلاینده­های پساب خروجی از زلال­سازهای لجن فعال واحد کاغذسازی سولفیت، هفتمین کنگره ملی مهندسی شیمی ایران، دانشکده فنی دانشگاه تهران، 9-6 آبان 1381، 659-664
   
   
   1. Tambosi, J.L., D.M.D., Schirmer, W.N., Jose, H.J., Moreira, R.D, 2006. Treatment of paper and pulp wastewater and removal of odorous compounds by a fentone- like process at the pilot scale. Chem Technol Biotechnol 81: p. 1426-1432.
   
   
   2. Wang, J.P., Chen, Y.Z., Ge, X.W., Yu, H.Q., 2007. “Optimization of coagulation-flocculation process for a paper-recycling wastewater treatment using response surface methodology”. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 302(1-3), 204-210.
   
   
   3. Latorre, A., Malmqvist, A., Lacorte, S., Welander, T., Barcelo, D., 2007. Evaluation of the Treatment Efficiencies of Paper mill Whitewaters in Terms of Organic Composition and Toxicity, Environmental Pollution, 147: 648-655.
   
   
   4. Yilmaz, T., Y.A., Basibuyuk, M , 2008. Comparison of the performance of mesophilic and thermophilic anaerobic filters treating paper mill wastewater. Bioresource Technology, 99, p. 156-163.
   
   
   5. Ahmad, A.L., Wang, S.S., Tang, T.T., Zuhairi, A., 2008. Improvement of alum and PACl coagulation by polyacrylamides (PAMs) for the treatment of pulp and paper mill wastewater. Chemical Engineering Journal, 137(3): p. 510-517.
   
   
   6. Pala, A., Tokat, E., 2002: Color from Cotton Textile Industry Wastewater in an Activated Sludge System with Various Additives: Water Research, 36: 2920-2925.
   
   
   7. Ben Mansor, I., Kesentini, I., 2008. Treatment of Effluents from Cardboard Industry by Coagulation- Electroflotation, Journal of Hazardous Materials, 153:  1067-1070.
   
   
   8. Wang, D., Sun, W., Xu, Y., Tang, H., Gregory J., 2004.Speciation stability of inorganic polymer flocculation- PACL. Colloids and Surfaces, 243,1-10.
   
   
   9. APHA, Standard Methods for Examination of Water and Wastewater, 1998. 20^th ed American Public Health Association/American Water Works Association/Water., Environment Federation, Washington, DC.
   
   


2. روشنی، بابـک، شاه­منـصـوری، محـمد­رضـا و صیـد­محمدی، عبدالمطلب؛بررسی تصفیه فاضلاب صنایع شوینده به کمک فرآیند انعقاد در مقیاس آزمایشگاهی، مجله علمی دانشگاه علوم پزشکی کردستان، شماره 2 سال هشتم زمستان1382، 67-75.
   
   
   1. Zayas, T., Romero, V., Salgado, L., Meraz, M., Morales, U., 2007. Applicability of coagulation/flocculation and electrochemical processes to the purification of biologically treated vinasse effluent. Separation and Purification Technology, 57(2): p. 270-276.
   
   
   2. Huang, C., P.J.R. 2002. “Coagulation approach to water treatment Encyclopedia of surface and colloid Science”. Marcel Dekker Inc, New York, 210-222.
   
   
   3. Berna, J.L., Morenoand, A., Ferrer, J. 1997.The Behavior of LAS in the environment. Chem. Technol Biotechnol, 500, 387-398