Pengaruh Bunyi Ultrasonik Terhadap Pertumbuhan Bakteri pada Bahan Baku Air PDAM

Penulis

  • Nur Yaqin AAK Delima Husada Gresik
  • Nur Rizki Amaliyah

Abstrak

Water raw material of PDAM is water that is processed into processed
water then distributed to public. Raw materials from river water need to be
processed before being distributed to the community. Processing such as
deposition of dirt and disinfectant to remove bacteria present in PDAM water raw
material. However, the processing of PDAM water raw materials still uses
chemicals such as chlorine gas which is used as a disinfectant of PDAM water
raw material. The reduction of hazardous chemicals required the exposure of
ultrasonic sounds that can reduce the number of bacteria in the water of raw
materials of PDAM. However, there are only a few bacteria that can die from
exposure to the ultrasonic sound.
This research was conducted by using total plate number method to know
the amount of bacteria of raw material of exposed PDAM water and not exposed
with ultrasonic sound. Both samples were planted on NAP medium for 24 hours
with temperature 370C.
 The results obtained from the research for the exposed sample experienced
an increase in the number of bacteria, on the 1st day there were 180 colonies, the
2nd day 230 colonies, and the 3rd day 160 bacterial colonies. As for the
unexposed to obtain the results of the 1st day of 169 colonies, the 2nd day of 193
colonies, days to 3- 160 colonies. This suggests that ultrasonic sounds can only
inhibit the growth of certain bacteria.


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06-06-2017

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