00682nam a22001577a 4500003000800000005001700008008004100025040002100066082001700087245017800104260004200282300004900324500007800373504005200451650002100503BD-DhUL20151129080135.0151129s200907  bg a|||| m||| 00| 0|eng d  aBD-DhULcBD-DhUL  a628.162bIMP  aImpact of ammonia contamination on surface water treatment processes and its removal from polluted river water by aquatic macrophytes and nitrifying bacteria /h[PhD Thesis]  aDhaka :bUniversity of Dhaka ,c2009.  aVarious pagins :bill. (some col.) ;c29 cm.  a Thesis (PhD)--Department of Microbiology, Universxity of Dhaka, 2005-06.  aIncludes bibliographical references and index .  2Water pollution.