Abstract
Cassava (Manihot utilissima) is the main raw material of tapioca flour industry. The tapioca industry waste water still contains high enough BOD, COD, and cyanide, above the quality standard of industrial waste water. Photo-Fenton is one of the most effective alternative methods of degrading organic pollutants. This study aims to determine the effect of Photo-Fenton method on the degradation of organic pollutants such as COD and cyanide. For operating conditions of this study use the addition of concentrations of H2O2 and FeSO4.7H2O and different UV light intensity. The analysis of COD concentration using SNI method is spectrophotometric. From the research result, it is found that the concentration of COD and cyanide in tapioca waste can be reduced by using Photo-Fenton method. With initial COD content of 6000 mg/L and cyanide level of 0.67 mg/L. And in the operating conditions of the addition of 5 ml/l of H2O2, Fe2+ 1.25 mg/l, and light intensity of 200 lm, the highest COD and cyanide levels were found to be 900 mg/l for COD and 0.08 mg/l for cyanide. Final levels of COD up to 900 mg/l and cyanide concentrations up to 0.08 mg/l.
Highlights
Tapioca industry is an industry that can be managed in many ways
Tapioca waste water, which is obtained from Tapioca
Chemical materials used in this experiments are Fenton reagents such as H2O2 analytical grade 30% w/w and Fe2SO4.7H2O analytical grade 99%
Summary
Tapioca industry is an industry that can be managed in many ways. It can be a small scale, medium scale, or even large scale industry. It has a great potential in penetrating domestic and international market. The greatest domestic demand comes from some parts of Java Island, such as: Bogor, Tasikmalaya, and Indramayu. While the international demand comes from some of ASEAN countries and European countries. As for the industry itself, there are a lot of promising places in Indonesia, they are: Pati, Batang, Temanggung, Wonosobo, and DIY Yogyakarta
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