Broiler Supplement by Optimizing the Growth of Local Microalgae in Various Wastewater

The variety of contents of the growing medium has become a factor to determine the quality of microalgae. Medium derived from the extract of bean sprouts waste, wastewater of tofu industry, wastewater of tempe industry, and wastewater of poultry feces have been tested to observe the growth of local microalgae. The culture placed in 250 ml Erlenmeyer flask aerated and lighted with a 40 watt TL lamp. Every type of waste with 6 concentrations was tested to see its growth. The observation has been conducted to observe population density within 20 days. The observed parameters are dry weight, protein, fat, Vitamin A, C, and E. All of them were tested at the end of the experiment. The result shows that the wastewater of tempe industry with a 4% concentration is the optimum medium for growing local microalgae. The population density was 1.02 x 104 cell/ml and attained on the 10th day of the experiment. The highest dry weight is bean sprouts extract, which is 13.03 mg/l. The content of crude protein ranging from 58.23 % - 63.07%, crude fat ranging from 20.88% - 21.56%, Beta carotene ranging from 6.3 mg/gram – 8.0 mg/gram, Vitamin C ranging from 2.24 mg/gram – 2.62 mg/gram, and the content of Vitamin E is 0.8 mg/gram – 1.14 mg/gram. It can be declared that the wastewater of tempe industry can be used as a medium for growing local microalgae. Local microalgae biomass can be the candidate of feed supplement for broiler since it contains nutritions.