There are two
mains objectives in this study which is to determine the reduction of the several
parameters which are organic and inorganic by using activated sludge
treatment.Then to identify the factors affecting the activated sludge
treatment. According to the analysis that already, for both objectives was
achieved. Basically, this parameter was divided into three parts which are
physical test, chemical test, and biological test.For the chemical test, there
are two types which are organic and inorganic.Elevens parameters were analyzed
during this study which is a determination of Biochemical Oxygen Demand (BOD),
determination of  Chemical Oxygen Demand
(COD), determination of pH, determination of mixed liquor suspended solids
(MLSS), determination of mixed liquor volatile suspended solids (MLVSS),
determination of the sludge volume index (SVI), determination of turbidity,
determination of the conductivity, determination of heavy metals, determination
of Biological tests and determination of dissolved oxygen(DO).The first
objectives were achieved because all the parameter was had 80% reduction and it
means this treatment is good quality effluent and capable of removing the high
percentage of organics and inorganic compounds.The second objective was also achieved
because all the factor that affecting this treatment was under control by run
the analysis and proved it by calculation.The range of ratio F: M is between
0.2 until 0.5 and from the calculation was obtained is 0.2 and shown that the
balancing between the foods and microorganism is successful.Next, the range
percentage of returned activated sludge is 25% until 150% and the best
percentage is around 15%-30%.From the calculation that already obtains was
33.74% and it was under the range even not in the best range. Activated sludge
process has the simple arrangement which low installation cost and can remove
the high percentage of organic and inorganic pollutant. It uses oxygen and
microorganisms in this treatment thus it is the eco-friendly process, economical
way, and self-sustaining system. 

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