UJI POTENSI BOTOl PLASTIK BEKAS AIR MINERAL SEBAGAI MEDIA lEKAT PADA PROSES ANAEROBIK BIOFllTER DAlAM MENURUNKAN KONSENTRASI COD, BOD, DAN TSS L1MBAH CAIR RUMAH TANGGA

Abstract

Treatment of household wastewater could be difficult because of the high cost and
land requirement. An alternative solution to wastewater treatment is the Up Flow Anaerobic
Biofilter system. Commonly, Up Flow Anaerobic Biofilter treatment system use bioball as
attached growth media. This study did not use bioball media due to the high cost, instead it
use discarded plastic mineral water bottles as an attached growth media. The purpose of this
study was to measure the removal efficiency of COD, BOD, and TSS concentrations following
treatment with anaerobic biofilter system.
This study was a quasi-experiment and using a pre-post test design. The study
compared domestic wastewater quality before and after processing with anaerobic biofilter
system using discarded plastic mineral water bottles as an attached growth media. The depth
of the attached growth media in the reactor was 33 cm and the diameter was 30 cm.
Acclimatization process was performed for 14 days and operated for 24 days. Samples were
taken six times every four days to examine the COD, BOD, and TSS concentrations.
The results obtained of this study are : The average influent COD concentration was
254.76 mgjl, effluent COD concentration was 143.57 mgjl and the COD removal efficiency was
43.52%. The average influent BOD concentration was 151.01 mgjl, effluent BOD
concentration was 109.71 mgjl and the BOD removal effiCiency was 27.21%. The average
influent TSS concentration was 43.3 mgjl, effluent TSS concentration was 11.67 mgjl and the
TSS removal efflciencv was 72.5%. Based on one sample t-test, the average removal
efficiency of COD, BOD, and TSS concentrations were significantly different from the
deslqnated criteria for organic removal efficiency. In other words, it is not efficient (p<0,05).
It was so because of the operational duration of the anaerobic biofilter was not long enough
(24 days) and the initial organic concentration was low.
The suggestions for further research are: Controlling influent concentration at stable
level during operation, controlling the ratio of media and water volume, and calculating
nutrients needed (C, N, P).
Keywords: anaerobic biofilter, plastic media, domestic wastewater