PENURUNAN KADAR COD DAN BOD PADA LIMBAH CAIR KIMIA LABORATORIUM POLTEKKES KEMENKES BENGKULU DENGAN METODE BIOFILTER

Abstract

Laboratory waste is one of the waste in a small scope that tends contained many
heavy metals and organic materials therein. The nature of the waste is very dangerous and
toxic may not directly discharged into the environment. One of the sewage treatment by using
the method biofilter. The purpose of this research is to reduce levels of COD and BOD
effluent MoH Bengkulu polytechnic chemistry laboratory methods biofilter. Type of quasi
experimental study with pre-post study design test. Waste derived from laboratory chemical
waste. Measure the COD and BOD levels before and after treatment biofilter with five
repetitions. Analyzed by univariate and bivariate. Given the results of research based on the
analysis of univariate no reduction in COD levels by an average of 5.448% and the percentage
reduction in BOD levels decrease with the average percentage of 3.928% decline. Results of
bivariate analysis test t-Test that there are differences in the levels of COD before and after
treatment with 0.006 significance and there are differences in levels of BOD before and after
treatment with 0.003 significance