The research aims to assess the ability to treat slaughterhouse wastewater by using biofilter at one small slaughterhouse in Ben Tre province. The research was conducted by building a biofilter tank model and observing the formation of biofilm. The treatment capacity of pilot model was explored and evaluated using four different parameters including: TSS. BOD. https://www.soiebiologique.com/limited-price-Test-Evaluation-Command-ACU-Patch-Foliage-Green-flash-choice/