Efektivitas Bakteri Thiobacillus spp. dalam Mendekomposisi Bahan Organik pada Media Air Laut

Abstract

Akumulasi bahan organik di dalam perairan tambak budidaya dapat mengakibatkan terjadinya defisit oksigen serta dapat mengakibatkan udang mengalami tekanan secara fisiologis, sehingga menjadi rentan terhadap serangan penyakit. Penelitian ini bertujuan untuk mengetahui efektivitas bakteri Thiobacillus spp. dalam mendekomposisi bahan organik pada media air laut sebagai simulasi air tambak. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) in time dengan 4 perlakuan yaitu tanpa penambahan probiotik (kontrol), penambahan probiotik dalam media teknis molase sebanyak 5 ppm (P1), penambahan probiotik dalam media teknis molase sebanyak 10 ppm (P2), dan penambahan probiotik dalam media teknis molase sebanyak 15 ppm (P3). Setiap perlakuan dilakukan pengulangan sebanyak tiga kali. Parameter yang diamati yaitu kualitas air dan total bakteri. Penurunan BOD5 paling signifikan mencapai 53,4% terdapat pada P3, yaitu sebesar 86,4 ± 19,2 mg/L sedangkan penurunan TOM paling signifikan terdapat pada P1 yaitu sebesar 33,7 ± 2,9 mg/L. Bakteri Thiobacillus spp. terbukti cukup efektif memberikan pengaruh yang signifikan dalam mendekomposisi bahan organik.

The accumulation of organic matter in aquaculture pond can cause the oxygen deficit and can cause the shrimps are under physiological stress, therefore it can be susceptible by germs. This study aims to determine the effectiveness of bacteria Thiobacillus spp. to decompose organic matter in seawater media as a pond water simulation. This study used complete randomized design (CRD) in time with 4 treatments, namely without the addition of probiotic (control), addition of probiotic in the technical media of molasses as much as 5 ppm (P1), addition of probiotic in the technical media of molasses as much as 10 ppm (P2), and addition of probiotic in the technical media of molasses as much as 15 ppm (P3). Each treatment was repeated three times. Parameters that observed such as water quality and total bacteria. The most significant decrease of BOD5 reaching 53,4% was in P3, which was 86.4 ± 19.2 mg/L, while the most significant decrease of TOM was in P1, which was 33.7 ± 2.9 mg/L. Bacteria Thiobacillus spp. has been shown a significant effect to decompose of organic matter effectively.