KULTUR MIKROALGA Chlorella sp. DALAM MEDIA AIR GAMBUT YANG DIPERKAYA DENGAN NUTRIEN CAMPURAN LIMBAH CAIR ORGANIK

Abstract

Microalgae have a big role in handle of water pollution control that able cultured by peat water media. Peat water has a low nutrient contain and should be riched by organic alternative nutrient came from slaughterhouse and tofu liquid waste. The liquid waste tofu industry is around 20 million m3/year while the slaughterhouse contributes about 30,000-52,500 liters/day. These liquid wastes contain high organic matter such as nitrate and phosphate and have not been utilized to the maximum that can be used if released directly into water bodies. The purpose of this research was to study the effect of tofu liquid mixture and slaughterhouse used as nutrients in the growth of Chlorella sp. on peat water media. This research was conducted in May 2019 at the Greenhouse of the Faculty of Fisheries and Maritime Major, University of Riau, that using 5 types of treatment with different levels of concentration. The operational volume of each experimental unit was 3 liters which was then added by Chlorella sp. a total of 75 ml (2.5%). The results of this research indicate the growth and abundance of Chlorella sp. about 7,415 x 109 cells/l in the handling of P3 (60%) and there was a decrease in the value of Nitrates from 0.342 mg/l to 0.110 mg/l and Phosphate values from 27.356 mg/l to 17.511 mg/l. Similarly, other water quality parameters such as dissolved oxygen with an increase from 3.50 to 4.10 mg/l,, pH increased 8 and temperature according to the optimal limit of 33oC which indicates good water quality. The Conclusions are tofu industry liquid waste and slaughterhouse can be used as nutrients needed by Chlorella sp. in its growth and to improve water quality for the better. Besides Chlorella sp. has a lot of potential and benefits in daily life.