Original Research Article
Year: 2020 | Month: January-March | Volume: 5 | Issue: 1 | Pages: 165-170
BOD Decreasing of Liquid Waste Tofu Using a Constructed Wetland System
Erniwati Ibrahim1, Atjo Wahyu2, Amrafidah AR Hasan1, Anwar Daud1, Aminuddin Syam3, Agus Bintara1
1Department of Environmental Health, Faculty of Public Health, Hasanuddin University
2Department of Occupational Safety and Health, Faculty of Public Health, Hasanuddin University
3Department of Nutrition, Faculty of Public Health, Hasanuddin University
Corresponding Author: Erniwati Ibrahim
ABSTRACT
The liquid waste of the tofu industry is the waste from the process or the remainder of an industrial activity which is liquid in nature where its presence is not desired by the environment because it does not have economic value so it tends to be disposed of. The release of tofu wastewater into the environment without meeting established quality standards will cause disruption to the environment itself and to human health. The purpose of this study was to understand the effect of water hyacinth plants in reducing BOD levels by using a Constructed Wetland system using variations of water hyacinth 1 kg, 1.5 kg and 2 kg with a detention time of 21 days. An experimental study with a quasi-experimental research design by conducting pretest-posttest group design. Sample examination was carried at the Makassar Public Health Laboratory Center. Data analysis using General Linear Model-Repeated Measure test. The results showed the value of p = 0,000 <0,05, which means that there was an effect of the difference in weight of the water hyacinth plant to the detention time of decreasing BOD of tofu waste water with a value of BOD level which had decreased on the 7th day and below the standard on day 21 on when processing. Processing of Tofu industry wastewater by system constructed wetland can be recommended as a safe, inexpensive and environmentally friendly processing technology.
Keywords: Water Hyacinth, Liquid Waste, BOD, Constructed Wetland Systems