Perkembangbiakan Larva Nyamuk (Aedes aegypti L.) pada Limbah Tempe yang Telah Diberi Perlakuan Fotokatalitik Menggunakan ZnO

Abstract

Tempeh wastewater from the tempeh industry has become a serious environmental problem, particularly in proper wastewater treatment, such as Tanjung Anom Village, North Sumatra. Tempeh wastewater contains high concentrations of organic compounds that can pollute the environment and serve as a breeding ground for disease vectors such as A. aegypti. This study aims to analyze the effectiveness of photocatalysis using ZnO in reducing pollutant parameters in tempeh wastewater (BOD, COD, TSS, pH, and temperature), as well as to assess its impact on the development of A. aegypti larvae. The research employed a completely randomized design with six treatment groups (control(+), control(-), and ZnO at 1g, 3g, 5g, and 7g) and four replications. The results showed that ZnO treatment was effective in reducing BOD and COD levels below the of Regulation of the Minister of Environment of the Republic of Indonesia No. 5 of 2014 concerning Wastewater Quality standards and increased the pH toward neutral. TSS levels because of suspended ZnO particles. Larval testing showed that the 1 g ZnO treatment effectively inhibited larval development, while larval development was still observed at 5 g and 7 g, although at significantly lower levels than in the negative control. The study concluded that ZnO holding potential not only as an effective agent for treating tempeh wastewater but also as a larvicidal compound against A. aegypti.