The analysis of sludge's microbial make-up during Chironomus larvae cultivation

Abstract

Many microorganisms that thrive in wet and dry environments call silt (a nutrient medium) home. It is partly
recovered from the sewer by prolonged aeration. The composition of such a substrate, and hence its leading
indications, are dependent on the kind of organic impurities present. These nutrient-rich circumstances are ideal
for the development of Chironomus larvae and a wide variety of microflora. In order to determine the
microbiological make-up of the nutritive medium under different pasteurization procedures, the paper gives the
results of research of bacteriological crops of the substrate for Chironomus larvae. Pseudomonas spesialis bacteria
make about 80% of the colony-forming organisms in native sludge, followed by Bacillus subtilis at 15% and
Micrococcus luteus at 5%. The quantity of bacteria in the growth media was also observed to be reduced after
being subjected to various pasteurization techniques. The quantity of bacteria was reduced by 16 times after long-
term pasteurization at 65 °C. The number of colony-forming organisms was reduced by a factor of 22 after short-
term pasteurization at 75 °C and by a factor of 358 after rapid pasteurization at 95 °C compared to the original
nutritional medium.
Keywords: ; bacteria; pasteurization modes; colony growth