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Electro-osmosis Dehydrating

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E&D Global

Country / Year Established: South Korea /

Business type: Others

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Electro-osmosis Dehydrating Technology

Introduction
Electro-osmosis dehydrating is technology which reduces the percentage of water content down to 60 percent using mechanical dehydrating in the principle of destructing protoplasm of microorganism in sludge by utilizing electro-osmosis principle and the Brawnian motion, the inherency of electricity.

The electro-osmosis principle that we use is the nature which electrons take water molecules(xH2O) while moving from positive pole to negative pole when current flows into suspended material where water and solids are mixing. The Brownian motion which is incidentally used is a phenomenon that when current flows in suspended mixture surrounded by membrane, same kinds of ions actively move for molecular combination, which generate frictional heat and the volume in the membrane is expanded and the thickness of membrane becomes thin, so the membrane is torn just by slight external pressure.

For an effective dehydrating of sludge, cell membrane of sludge must be broken to eliminate water in the cell. In general, the percentage of water content is limited to about 80 percent because the existing mechanical dehydrating method is hard to deliver force to each and every cell. However, our technology of electro-osmosis dehydrating can dehydrate even bond water which is hard to be dehydrated mechanically and achieve 60 percent of water content.

Principle of Electro-osmosis Dehydrating

Process to Destruct Cells by Electric Actions

Water Distribution in Sludge and Characteristics

Division		Characteristics
External Water	Free water	.Water attached to sludge particles .Easy to eliminate by gravitational sedimentation	Easy to dehydrate
	Interstitial water	.Water found in-between floc of sludge and moving with floc .Also called floc water .Can be eliminated by mechanical dehydrating
Internal Water	Surface water	.Water attached to sludge particles .Also called capillary water .Can be eliminated when cell is destructed and compressed	Difficult to dehydrate
	Bound water	.Water chemically combined with sludge particles .Hard to eliminate by mechaniccal dehydrating
* Unlike the existing technology, a physical crimp-type dehydrating method, our technology of electro-osmosis dehydrating destructs cell itself by electric actions and can eliminate free water and interstitial water as well as surface water and bond water which have been hard to eliminate by the existing technologies.

Why it is hard to dehydrate sludge

Sludge is residue discharged from sewage and waste water disposal process. Solid matter is mainly comprised of living or dead body lumps of microorganism. Sludge is degenerated into substance difficult to treat because of high-molecular cohesive agents, chemicals input to separate water and solid matter at the final step of disposing sewage and waste water.

Disposal Process

Strong Points of Electro-osmosis Dehydrating

Classification	E&D technology	Existing Technology
Dehydrating	Electrolysis	Filter Press	Decanter	Belt Press	Vacuum Dehydrator
Applied principles	Electro-osmosis	Sludge supply pressure	Centrifugal force	Shear force, follicle compressing force	Vacuum filtration
Chemical in use	N/A	Polymeric cohesive agents	Polymeric cohesive agents	Polymeric cohesive agents	Polymeric cohesive agents
Water content after dehydrating	less than 65%	80~70%	85~70%	85~70%	85~70%
Operation expense	Electricity cost	Electricity cost added to high-pressure dehydrating	Low electric consumption	Electricity cost added to high-pressure dehydrating	High energy consumption
Pressure in use	Simple compression other than power supply	15kg/cm²	1,500~3,000G	10~20kg/m²/hr	10~25kg/m²/hr
Additional facilities	Steam eliminating facilities	Reaction facilities Chemicals facilities Cleaning facilities	Cleaning facilities Soundproofing Dedust facilities	Reaction facilities Chemicals facilities	Agitator equipment Cleaning equipment Conveyor to discharge dehydrated cake
Sludge supply	Continuous	Intermittent	Continuous	Continuous	Continuous
Applicability for change of characteristics of sludge	Good	Good	Good	Good	Good
Others	Disposing efficiency varies depending upon power supply	Difficult to work continuously due to batch-time operation	Lower recovery of solids, problems by high-speed revolution	Input of chemicals required	Odor occurs; lots of additional facilities

- Superior efficiency and economic feasibility to DC mode
- Cost to disposal of sludge on commission, facility expense and operation cost reduced
- Solves previous questions required to recycle sludge
- Preprocess technology can be applied to any method for an overland disposal of sludge
- Compact structure

Introduction of Products

EDG-S Series is the high-efficiency secondary dehydrator which can be installed at the read end of the existing primary dehydrator (belt press, decanter, etc.) and reduce the water content in sludge from 85 to 60percent using the electro-osmosis dehydrating principle.

EDG-S100 (Electro-osmosis Dehydrator by Global)	EDG-S200 (Electro-osmosis Dehydrator by Global)

Specification		EDG-S Series(water content 85%→60%) (Electro-osmosis Dehydrator by Global)
Specification		EDG-S100	EDG-S200
Belt Wide(mm)		1000	2000
Power consumption(kw)		70	130
Capacity(ton/hr)		0.3~0.4	0.6~0.75
Weight(ton)		4	6
Size	L(mm)	3200	3200
	W(mm)	1500	2400
	H(mm)	3200	3200

Equipment configuration


Electro-osmosis Dehydrating Manufacturing Process Chart	Electro-osmosis Dehydrating Manufacturing Process Chart

Electro-osmosis Dehydrating Manufacturing Process Chart	Electro-osmosis Dehydrating Manufacturing Process Chart

Installation Scene	Installation Scene

Electro-osmosis dehydrator Drive	Electro-osmosis dehydrator Drive

Before dehydrating water content - 83.13%	After dehydrating water content - 55.52%

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E&D Global

Minisite Heart

Country / Year Established: South Korea /

Business type: Others

President: Kwangsun Park

Address: 5F Shinhan building, 1294-18 Chipyeong-dong, Seo-gu, Gwangju, Korea

Product Category: Waste Management

No. of Total Employees: 1-50

Company introduction: E&D Global was founded in 2012 as a global environmental company under the banner of green growth, the fundamental topic for human life. We have developed and completed new technologies for sludge reduction and succeeded in commercialization through our endless technical development and intense field experiences. Everyday we dump more than 10,000ton of sludge at sea, which causes marine environment pollutions that is on the rise as a serious problem at government level. Therefore, the government has prohibited a dumping of sludge at sea since 2012 and each of the local governments are considering alternatives for overland disposal of sludge. E&D Global has succeeded in solving all of these problems by a long technical development and great expense. 'Electro-osmosis Dehydrating' and 'Low-temperature Ventilation and Drying', both technologies completed by us, are the green original technology true to the name and will provide the best value. E&D Global promises to go with you as a global leading company for environment through commercialization of sludge disposal. Thank you.