Aquatech, Ltd. [Community Plant Treatment]






		What Is Jarikko Purification System?

		Comparison to Activated Sludge Method




		River Purification

		Lake Purification

		Industrial Wastewater Treatment

		Community Plant Treatment



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・A 6-year-continuous-experiment has been done for the sewage, and as a result, a sludge production has not occurred. The present purified water of the experiment is the same as the one from the beginning of the experiment.

・Volumetric Retention Time: 10-20h (Determined by the concentration of inflow water and the weather)

・Aeration Quantity: 3.3m³/m²・h (Adjusted by the concentration of inflow)

・Flow-Down Distance: 10-20m (Determined by the circumstances of the place)

Small Amount of Inorganic Matter (Earth and Sand) in Inflow Sewage

Large Amount of Inorganic Matter (Earth and Sand) in Inflow Sewage

Below is the summary of conditions and results of the experiment from August 1997 to the present.

Down-Flow Distance	10m
Volumetric Retention Time	14 hours
Actual Retention Time	5.5 hours
Space Ratio	40% Between Jarikkos (Total Space Ratio: 64%)
Aeration Quantity	20m³/h（Per Area: 4m³/m²・h）
Aeration Pipes	40cm apart
Measurement of Equipment	Width 0.5m x Height 1.2m x Length 10m

	Inflow Concentration (mg/l)	Outflow Concentration (mg/l)	Removal Rate (%)
SS	131.6	14.5	87.8
BOD	229.9	16.1	92.7