ORIGINAL RESEARCH
		
		 
	
	
	
		Performance Evaluation of Trickling Filter-Based
Wastewater Treatment System Utilizing Cotton
Sticks as Filter Media
	
	
		Mian M. Ahson Aslam1, Zahid M. Khan1, Muhammad Sultan1, Yasir Niaz2, Muhammad H. Mahmood3, Muhammad Shoaib1, Aamir Shakoor1, Maqbool Ahmad4
		
			
			Pol. J. Environ. Stud. 2017;26(5):1955-1962