Effect of Using Effective Microorganisms EM-1 on the Performance of Extended Aeration Activated Sludge in Treating Domestic Wastewater
Article Sidebar
Main Article Content
Abstract
This research concerning with the effect of using the effective microorganisms on the efficiency of extended Aeration Activated Sludge Units which consist from many strain of Bacteria, Fungi and Actinomycetes in addition to board spectrum of nutrient and elements which important to growth, The use of this product is practically applied by using two bench scale laboratory units where they are operated to treat the wastewater after completing and preparing the activated sludge units to work under the same conditions of temperature and detention time (DT).
One bench scale is fed with wastewater and the other is operated by using a mixture of EM-1 along with the wastewater. It is noticed that the use of EM-1 with wastewater has reduced the smell resulting from disintegration in the aeration basin. Further, the color of sludge in the unit where EM-1 is added is light brown which means more activity and vitality. Besides, the concentration of mixed liquor volatile suspended solids (MLVSS) is increased by using EM-1 by 30% due to the increase of nutrients and a reduction in the sludge volume index (SVI) which is an important factor in the performance of the secondary settling basins which means a reduction in bulking of sludge, which is considered one of the most notable operating problem in activated sludge units. As a result bulking of sludge reduced by25% when EM-1 is used. Thus, EM-1 has participated in solving three important operating problems suffered by operators of these treatment units easily and without using complicated technologies or appliances. Further, EM-1 improves the removal efficiency of the units about 6-8% due to the reduction in chemical oxygen demand in the treated wastewater leaving the unit by 32%.
Metrics
Article Details
This work is licensed under a Creative Commons Attribution 4.0 International License.
THIS IS AN OPEN ACCESS ARTICLE UNDER THE CC BY LICENSE http://creativecommons.org/licenses/by/4.0/
Plaudit
References
المعهد العالي للعلوم التطبيقية والتكنولوجيا,مختبر الدراسات البيئية,الجمهورية العربية السورية,2003
Sustainable Community Development, L.L.C."EM Technology Microbes for Management, Serving the World" no
date, http:// www. emtrading. Com
EM1Waste Treatment an economically and environmentally sound approach to wastewater treatment, http://www.emro.com.
EM America, Inc"EM-1® Waste Treatment for Wastewater ", http://www.emro.com. 2005.
McGhee, T. “Water Supply and Sewerage”, 6th ed. McGraw-Hill, Inc., New York (1991).
Al-Layla M. Anis, Ahmad Sh. and Joe Midlebrooks E., “Handbook of Wastewater Collection and Treatment: Principles and Practice”, Garland STPM Press, New York & London, 1980.
Schroeder, E. D. ,“Water and Wastewater Treatment”, 1st ed. McGraw-Hill ,Inc. New York, 1977.
David Eye, J.; David P.E.; Fernando R. and David P.S., “Field Evaluation of the Performance of Extended Aeration Plants”, J. Water Poll. Control Fed. 1969; 41:1299-1318.
Joe Midlebrooks, E. and Fafland, C.F., “Kinetics of Model and Field Extended Aeration Wastewater Treatments Units”, J. Water Poll. Control Fed.,40: 586-612,1968.
David Eye, J.; David P.E.; Fernando R. and David P.S., “Field Evaluation of the Performance of Extended Aeration Plants”, J. Water Poll. Control Fed.; 41:1299-1318, 1969.
APHA, AWWA, WPCF., “Standard Method for the Examination of Water and Wastewater” ,20th ed., Am. Public Health Assoc. Washington D.C. 1998.
Bisogni, J.J. and Lawrence, A.Wm ,“Relationships Between Biological Solids Retention Time and Settling Characteristics of Activated Sludge”, J. Water Research, 5:753-763, 1971. DOI: https://doi.org/10.1016/0043-1354(71)90098-4
Using EM،s Products ,Their Uses and Applications,http://www.em-naturallyactive.com.
Verhoogt; J.C., Jaarsveld; V , Truijen; G.L. and Theunissen; J.C., "Effect of Effective Microorganisms (E.M.-A)
on Sludge Production and Biological WasWastewater Treatment Systems Performance", www.em-naturallyactive.
com . May , 2005.
Ramalho; R.S. ,"Introduction to Wastewater Treatment Processes" Academic Press, Inc. 1977.
Adams C.E. and Eckenfelder W. W., "A Kinetic Model for Design of Completely-mixed Activated Sludge Treating Variable -Strength Industrial
Hartley; K.J., "Operating the Activated Sludge Process", 3rd ed. Guttering Haskins and Davery.Australia, 1988