PENGGUNAAN BIOSAND FILTER MEDIA AMPAS TAHU DALAM MENURUNKAN KONSENTRASI COD DAN TSS PADA LIMBAH CAIR TAHU “PABRIK TAHU PAK MUL” DI KECAMATAN SUKUN KOTA MALANG

Abstract

Abstract, Tofu waste water is waste obtained from the tofu production process in the form of liquid.
The tofu waste generated from the home industry "Pak Mul Tofu Factory" is in solid form in the form of
dregs which is the dirt from soybean cleaning, while the liquid waste produced is in the form of soaking
water, and turbid liquid waste. which is yellow-gray which if left unchecked will turn black and cause a
foul odor. The wastewater produced has COD (Chemical Oxygen Demand) content of 8740 mg/l and a TSS
(Total Suspended Solid) concentration of 477.7 mg/l. Therefore, treatment efforts are needed before waste
water is discharged into water bodies in order to overcome environmental problems caused by tofu waste
water.
In this research, the processing used is biosand filter processing using tofu dregs media, fine sand,
coarse sand and gravel. This study aims to determine the ability of the tofu dregs biosand filter as an
additional medium in reducing the concentration of COD and TSS in tofu wastewater. The variable used
in this study is the thickness of the different media in each reactor.
The results showed that the treatment of tofu waste water using a biosand filter media tofu waste was able to reduce the concentration of COD and TSS with decreasing efficiency in reactor 1 with the
composition of tofu dregs activated charcoal media, fine sand, coarse sand and gravel (10:40:20:10) cm
are 87.44% and 79.26%, respectively. In reactor 2 with the composition of tofu dregs activated charcoal
media, fine sand, coarse sand and gravel (20:10:30:2 0) cm, the efficiency values for reducing COD and
TSS concentrations were 87.44% and 79.26%, respectively. and 90.04%.