Cost Comparisons Chart

		Volute Dewatering Press	Screw Press	Centrifuge	Belt Press
General Information	Overall Image
	Model (Capacity ~ 120kgds/h)	AMCON: ES-301	Inner Diameter: 19.7inches	Inner Diameter: 31.5inches	Standard Model: 59.0inches wide
	Principle	»The main body is composed of accumulated Rings and Screw. »The accumulated Rings work as filter. The solids and the liquid are separated by the pressure caused by the Screw. »The Screw pushes the edge of the Moving Rings (diameter smaller than the Screw) so that they move continuously in the gaps between the Fixed Rings as it rotates. This cleans the gaps and prevents clogging.	»The main body composed of the punching metal or wedge wire and screw. »The punching metal or wedge wire works as filter. The solids and the liquid are separated by the pressure caused by the Screw. »The gravity dehydration and the pressuring dehydration are done to the floc made by the coagulant.	»The screw is built in the closure body. »It separates by the specific gravity difference of liquid and solids. »The sludge is introduced into a bowl rotaing at high speed. Centrifugal force causes liquid-solid separation.	»The main body is composed of filter cloth. »After gravity dewatering, the sludge is sandwiched between two filter cloths. Dewatering is carried out by compression and application of pressure, using rollers and belts.
	Footprint	128.3inches X 37.0inches (including flocculation tank and control panel)	150.0inches X 25.6inches (Excluding flocculation system and control panel)	114.6inches X 58.5inches (Excluding flocculation system and control panel)	192.1inches X 85.4inches (Excluding flocculation system and control panel)
	Dry Weight	1866lbs (including flocculation tank and control panel)	1556lbs (Excluding flocculation system and control panel)	4222lbs (Excluding flocculation system and control panel)	11555lbs (Excluding flocculation system and control panel)
Operational Cost	Total Power Consumption	0.8kW	3kW	20.5 kW	2.25 kW
	Rinsing Water Consumption	10.52gallons/h	131 gallons/h	658 gallons/h	1579 gallons/h
	Maintenance Time	**1. 5min/day (Normally) or once a week	Depends on Operation Condition	Depends on Operation Condition	Depends on Operation Condition
	Normal Operation Condition	**2. 24 hour unattended operation (Normally)	Depends on Operation Condition	Depends on Operation Condition	Depends on Operation Condition
	Labor Cost	Extremly Low	Normal	Normal	Normal
Other	Noise, Vibration	Extremly Low	High	Extremely High	High
	Advantages	♦Easy Maintenance, Easy Operation ♦No clogging, No washing water ♦Suitable for Oily sludge ♦Component Number is small ♦Low concentration sludge possible ♦Variable Model from 1kgDS~720kgDS/h	♦Capacity is big	♦Capacity is big	♦Capacity is big
	**3. Spare Parts	♦Moving Rings: every 5 years ♦Volute Screw: every 15 years	♦Gear Box:every 1 year ♦Brush on Screw: every 5 years ♦Spray Nozzle:every 5 years ♦Bottom Bearing Assembly: every 7 years	♦Screw Conveyor: every 3 years ♦Casing: every 3 years ♦Spray Nozzle: every 5 years ♦Oil Pressure Motor: every 5 years	♦Filter Cloth: every year ♦Gear Box: every 3 years ♦Spray Nozzle: every 5 years
	Weak points	×Capacity is small	×Clogging is generated easily ×Maintenance is difficult.	×Running cost is high ×Maintenance is difficult ×big noize and big vibration	×Clogging is generated easily ×Use of huge amonunt of washing water increases the loads to the wastewater treatment process.

**1. At some plants, only once-a-week maintenance check-up are carried out.
**2. Flexible operational hours can be set according to the conditions on each site.
**3. Operation Time : 8 hours/day, 5 days/week.
**4. Above data is one of the basic data. Specification may vary depending on kind of models.

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