Authors :
Findia Wulan Djari; Rezania Asyfiradayati
Volume/Issue :
Volume 9 - 2024, Issue 3 - March
Google Scholar :
https://tinyurl.com/4vu3kz8e
Scribd :
https://tinyurl.com/2pxeuew7
DOI :
https://doi.org/10.38124/ijisrt/IJISRT24MAR1806
Abstract :
Tofu industry liquid waste is one of the
pollutants that can pollute the environment, especially
can cause turbidity in rivers, lakes, and other waters. One
of the countermeasures is to treat the liquid waste by
giving alum coagulant. The purpose of this study was to
measure the turbidity level of tofu industry wastewater
before and after the application of alum coagulant and
calculate the effectiveness or optimal dose/concentration
of alum coagulant. This research is a type of quantitative
research with a quasi-experimental research design. The
research was conducted at the Public Health Laboratory
of Universitas Muhammadiyah Surakarta in January
2024. The data analysis technique used was quantitative
to determine the effectiveness of alum coagulant, the test
used was anova test. The results of this study indicate that
the level of turbidity in the liquid waste of the tofu
industry after the coagulation process using alum is at a
concentration of 2 ml which produces a decrease in
turbidity levels of 22.93%, a concentration of 4 ml
produces a decrease in turbidity levels of 26.24%, a
concentration of 6 ml produces a decrease in turbidity
levels of 29.08%, and a concentration of 8 ml produces a
decrease in turbidity levels of 36.41%, so that the
optimum dose / concentration of alum coagulant is 8 ml
because it has the best effectiveness value in reducing
turbidity levels in the liquid waste of the tofu industry.
Keywords :
Effectiveness; Turbidity; Tofu Industry Liquid Waste; Alum Coagulant.
Tofu industry liquid waste is one of the
pollutants that can pollute the environment, especially
can cause turbidity in rivers, lakes, and other waters. One
of the countermeasures is to treat the liquid waste by
giving alum coagulant. The purpose of this study was to
measure the turbidity level of tofu industry wastewater
before and after the application of alum coagulant and
calculate the effectiveness or optimal dose/concentration
of alum coagulant. This research is a type of quantitative
research with a quasi-experimental research design. The
research was conducted at the Public Health Laboratory
of Universitas Muhammadiyah Surakarta in January
2024. The data analysis technique used was quantitative
to determine the effectiveness of alum coagulant, the test
used was anova test. The results of this study indicate that
the level of turbidity in the liquid waste of the tofu
industry after the coagulation process using alum is at a
concentration of 2 ml which produces a decrease in
turbidity levels of 22.93%, a concentration of 4 ml
produces a decrease in turbidity levels of 26.24%, a
concentration of 6 ml produces a decrease in turbidity
levels of 29.08%, and a concentration of 8 ml produces a
decrease in turbidity levels of 36.41%, so that the
optimum dose / concentration of alum coagulant is 8 ml
because it has the best effectiveness value in reducing
turbidity levels in the liquid waste of the tofu industry.
Keywords :
Effectiveness; Turbidity; Tofu Industry Liquid Waste; Alum Coagulant.
