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Electric Dehydrator

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Electric Dehydrator Technology Introduction * Abstract of sludge dewatering technologySludge dewatering method is intended to eliminate water from sludge, to enhance operating cost reduction effect and resource values, as well as to reduce transportation cost up to the final disposal and to cause no trouble for land disposal techniques. * Classification of sludge dewatering technology a. Filtering dehydration method 01 Method by the drying bedA method of infiltration drainage into the filter bed and drying on the surface after allowing the sludge flow on to the filter bed where sand or filtering materials have been laid 02 Drying LagoonA drying method to put sludge in the lagoon for precipitation, to send supernatant back to the disposal facility, and evaporate the sludge of 0.7~1.4m depth b. Mechanical dewatering method 01 Vacuum dehydrator (Vacuum Filter)- A dewatering method where the outer circumference of spin drum is covered by filtering cloth, negative pressure(300~600mmHg) in the drum inside is maintained by a vacuum pump, and the drum rotates. 02 Pressing dehydrator (Filter press)- A dewatering method to pressurize the sludge wrapped by filtering cloth 03 Centrifugal dehydrator (Screw decanter)- A dewatering method by gravity after receiving centrifugal effect of 1,000~3,000G resulting from rotating movement of solid particles 04 Belt press- A method to dewater the sludge continuously by one or two moving belt.- A dewatering method by gravity when the sludge reformed by organic polymer coagulant is injected into the belt press, and by pressure between rollers along the movement of belt. 05 Screw press- A dewatering method by compressing and extruding the condensed sludge with screw C. Analysis by the kinds of dehydrators Item Our technology Existing technology Dewateringtype ElectricDewatering Filterpress Screwdecanter Beltpress Vacuumfilter Picture Appliedprinciple Electric infiltration Sludge supply pressure Centrifugal force Filter cloth Decompression filtering Appliedagent Not applicable Polymer coagulant Polymer coagulant Polymer coagulant Polymer coagulant %of watercontentafterdewatering below 65wt% 80~70wt% 80~70wt% 80~70wt% 80~70wt% Operatingcost Electricity cost Added electricity cost of high pressure dewatering part Less power consumption ratio Added electricity cost of high pressure dewatering part big energy consumption Servicepressure Simple compression except for power supply 15kg/cm2 1500~3000G 10~20kg/m3/hr 10~25kg/m3/hr Incidentalfacilities Steam removal facility Reaction facilityDrug facilityCleaning facility Cleaning facilitySoundproof facilityDedusting facility Reaction facilityDrug facility Agitating device in VatCleaning deviceDewatered cake discharge conveyor Sludgesupplymethod Continuous Intermittent Continuous Continuous Continuous Applicabilityagainstsludgebehaviorchange Good Good Bad Good Ordinary Others Disposal efficiency varies with the quantity of power supply Continuous work is difficult due to Batch type operation Solid recovery is small.Issue of high rotation Drug injection is required. IntoxicationMany incidental facilities Principles and advantage of electric dewatering technology Definition of Sludge Sludge is called Oh-Nee in Chinese language. Sludge in the dictionary means a solid substance settled down from the floating matters when sewage is precipitated in water tank or reservoir. Diverse sludges are obtained during several stages of sewage treatment process. That is, at the first stage chemically settled sludge is obtained, then sludge activated by a drip filter is obtained, and retted sludge is obtained. Some sludge is sent to the ocean after treated with the underwater dumping method or water pumping method, some is sold as a fertilizer after being dried, and some is retted after anaerobic treatment in the water reserver like an imhoff tank or precipitation tank with microbes to reduce organic components. During the retting process, as its volume decreases, and residues are comparatively harmless, characterized of humus soil, it is filled in the land. When we see the definition of "Wastes" in Article 2, Waste Management Law, they are garbages, burnt matters, Oh-Nee, waste oil, waste acid, waste alkaline, animal corpses, and substances not required further for human life or business activity. Oh-Nee is included here in the category of waste, but the definition is not stated as a separate title and dispersed in several titles. To explain more easily, a mixture of solid foreign materials(microbes, etc.) input or created during the purification process of fine solids (dust, etc.) mixed in sewage and waste water - 98% of water content concentrated or condensed during the purification process - is called slurry. First-dewatered slurry, 80% of water content, is called cake sludge. Sludge production details Sewage and wastewater include fine solids (dust, etc.) mixed during the use of water and microbic solid foreign materials input or created during the purification process. At the final stage of sewage and wastewater purification process, used is a method to separate from water the foreign materials by condensing them only normally with the input of chemicals of polymerThis condensed state is called 'Slurry'. a limp shape of 98% of water content in general (98% water, 2% solids)This slurry is discharged separately and goes through dewatering process. Most dehydrating equipment currently installed at the sewage and wastewater treatment plant are 'belt press dewaterers' or centrifugal separation dewaterers'. A lump of final foreign materials through such dehydration process is called 'Sludge', which is normally 80% of water content (80% water, 20% solids) characteristic of watering out when holding it in the hand and pressing it.Currently the technology of dehydration below 80% in average of water content in sludge does not exist all over the world. The reason is that we cannot draw internal water in the microbic cytoplasm, a major constituent of sludge. Technical principle of the electric dehydrator To utilize "electroosmosis", one of electric inherent properties, and to utilize incidentally electro-phoresis", and "Brown motion". To utilize the power supply method using voltage difference, to break sludge cell membranes, and thus to discharge water in the cell Sludge cell breaking process by electric dehydration slurry to 70%. We contribute to sludge fuel energy business by further evolving the technology which reduces 80% cake first dehydrated to 60%. At present our technology is introduced to domestic sewage and wastewater treatment plant and private companies for cost reduction and corporate image enhancement for improving environment. Our company is leaping toward a global environment enterprise through interchange, collaboration, and export with companies in Europe, China, USA, and Asian countries. We are performing a leading role in true-to-the-name electric dewatering technology by securing stability, efficiency, and technique of electric dehydrators, after overcoming previous problems by rich site application experiences Sludge treatment process of the electric dehydrator Product specification of the electric dehydrator Item Contents Kind of product Complex type electric dehydrator(EDG-C2400) Standard type electric dehydrator (EDG-S2400) Productpicture Dewateredobject slurry(over 98% of water content) sludge cake(around 80% of water content) %of water contentafter dehydration 65~70% 60±3% Optionalspecification Replacement for the existing dehydratorReplacement for the new dehydrator Secondary dehydration at the rear part of the existing dehydrator Belt width(mm) 2,460 2,460 Treatedamount(ton/hr) 8~10ton(based on 98~98% slurry) 1ton(based on 80% sludge cake) Powerconsumption(kwh) 150 150 Size(LxWxH) 3510x3424x3430 3354x3510x3204 Scope ofsupply Console, VAR system Console, VAR system Input principle Transport slurry and coagulant through pipe with a motor, agitate in the agitator, put the slurry into the input device with a slurry head (windmill type) Put into the sludge supply device, the sludge discharged from the first dehydrator and stored in the hopper, and supply it to the dehydrator in the fixed quantity in accordance with the sludge characteristics. Drawing of the electric dehydrator a. Drawing of complex type electric dehydrator(EDG-C2400) b. Drawing of standard type electric dehydrator(EDG-S2400) List of required power Item Model Specification Q'ty Requiredpower(kw) Manufacture Requiredpower Complex type electric dehydrator 150Kw/3Ø/380V 1 146 E&DGlobal Standard type electric dehydrator 150Kw/3Ø/380V 1 146 Ordinarypowerrequired Main driver 1.5Kw/3Ø/220/380V 1 1.5 SamyangReductionGear Drum cleanser 0.4Kw/3Ø/220/380V 1 0.4 Filter cloth cleaner 0.4Kw/3Ø/220/380V 1 0.4 Supply of fixed amount of sludge 0.4Kw/3Ø/220/380V 1 1.2 Console 0.4Kw/3Ø/220/380V 1 0.4 Vendor Others - 0.1 - Total 150 Consumable details No. Product Name Q'ty Material Time 1 Drum 1set Titanium 7,500 2 Filter cloth 1set DM-101 4,000 3 Discharge scraper 1set MC NYLOM 4,000 4 Drum brush 1set PP 4,000 5 Filter cloth belt brush 1set PP 4,000 6 Surge belt of the fixed quantity supply device 1set PVC 5,000 7 Power supply device(brush) 1set Carbone(>80%) 8,000 8 Mechanical valve 1set PMSV2406-VA-02 4,000 9 Electric valve 1set Electric type/Screw type 4,000 10 Limit switch 1set AC220V 1,000 11 Fixed quantiy supply leveller 1set HILV-100 4,000 12 Bearing 1set UV bearing 2,500 13 Cylinder 1set GDC80-100 1,000km * This period table may be changed according to the site conditions and user's management.* Replacement is requested after checking the state of consumables. Maintenance cost calculation and details Design criteria of hydrator [Operating condition of the standard type hydrator: 8 hours] [Design capacity based on 8~10ton/day] [based on 80% of water content] Item Designcapacity Input %ofwater content %of watercontent indischarge Operatinghour Treatedquantity Sludge cake 8~10ton/day 80% 60±3% 8~10hr 0.8~1ton Design criteria → Operating hour for one dehydrator is 8~10hrFor the operation of 8~10 hours/day, one dehydrator should be installed. Maintenance cost Calculation conditions 01 Electricity cost [Power consumption calculation] Constructiontype Equipmentname Power(kw) Quantity(set) Serviceoperationhour(hr) Applied load(kw.h.day) Service Total Sludgedewateringfacility Electricdehydrator 150 1 1 8 1,200 * Calculation basis of electricity costㆍ Operating condition - dehydrator 1 set (8~10hr/day) ㆍ Design specification - Power consumption 150kw/setㆍ Charge- Basic rate 150kw x 1(set) x W6,970 = W1,045,500- Electricity rate used 150kw x 1(set) x 8(hr/day) x W77.18= W92,616* 2010. 08. 01. Increase of electricity rate (about 17% increase compared with that in 2008)* Basic rate W6,970/Kw(Monthly)* Unit rate W77.18/Kwh(average per season) Unit rate in 2008 W62.55/Kwh* Unit rate reduced by 16% for 24 hours operation (reduction in case of night use) 02 Water capacity Constructiontype Equipmentname Usedamount(m3) Quantity(set) Serviceoperationhour(hr) Appliedquanity(m3/day) Service Total Sludgedewateringfacility Standard type electric dehydrator(EDG-S2400) 1 1 1 8 8 * Calculation basis of water capacity - Used amount(m3) x 1(set) x 8(operating hour per day) = 8m3/day 03 Consumables and repair/maintenance costs * Consumable costs : calculation of consumable costs- Main consumables: Drum re-coating costs of the electric dehydrating device (W25mil./year/set)→ Drum re-coating cost = W25,000,000/year * Repair cost : Replacements of tools and material like filters, replaced quantity, and relevant costs- General consumable costs : 0.5% of mechanical device costs:W2,500,000/year Calculation details of operation cost per ton Item Unit priceapplied Amount perday Yearlyconsumptioncost Remarks Electricitycost Contract power (150Kw) W6,970/kw 1,045,500 12,546,000 Electricity used 77.18/kwh 92,616 30,563,280 Total 43,109,280 Water cost Used water W917/m3 8 2,420,880 Fuel cost Not applicable - - - Consumable cost Drum re-coating cost 25,000,000 8,800,000 Yearly 1set(Replacement period: 7500 hrs) Repair/maintenancecost 0.5% of mechanicalequipment cost 2,500,000 2,500,000 Labor cost Operator 24,000,000 48,000,000 2 persons Total 104,830,160 Operating cost per ton (80% → 60% of water content) W39,708/ton *Excluding civil work and other utility costs Economy of the electric dehydrator Our dewatering technology uses electroosmosis and electrophoresis instead of physical force, allowing up to 60% of water content as it destruct sludge particles with electric action and dehydrate internal water. As dewatered sludge loses its intrinsic property and non-dry section, the following dry method can be simple and the cost will greatly be reduced for advantage. Besides, compared with existing technologies, its facility and operating costs can be reduced down to 1/2. It, as a realistic and core technology, can also be applied to pre-treatment technology to any sludge land treatment techniques Comparison of economic feasibility for the electric dehydrator (10 ton, 80% sludge cake per day) Item Unit Comparison before/after dehydration Beforehydration(82%) Afterdehydration(60%) Afterdehydration(50%) Sludge production ton/day 10 4.5 3.6 Water reduction rate %/day - 55.0 64.0 Power consumption kwh/ton 130 135 Electric cost Unitcost W/Kwh 80 80 Calculation W/day 104,000 108,000 Sludgetransportationcost Unitcost W/ton 20,000 20,000 20,000 Calculation W/day 200,000 90,000 72,000 Sludgedisposal cost Unitcost W/ton 60,000 60,000 60,000 Calculation W/day 600,000 270,000 216,000 Economic feasibility analysis of electric dehydrator and dry system(10ton/day, 82→60% dry) Item Electric dehydrator Dryer system In case of useing LNGW900/m3 In case of using keroseneW1,500/L Yearlyenergy cost 150Kwh x 10ton x 365day x W80/Kwh=W43,800,000 45m3 x 10ton x 365day x W900/m3=W147,825,000 55L x 10ton x 365day x W1,500/L=W301,125,000
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    Electric Dehydrator Technology Introduction

    * Abstract of sludge dewatering technology
    Sludge dewatering method is intended to eliminate water from sludge, to enhance operating cost reduction effect and resource values, as well as to reduce transportation cost up to the final disposal and to cause no trouble for land disposal techniques.

    * Classification of sludge dewatering technology

    a. Filtering dehydration method

    01 Method by the drying bed
    A method of infiltration drainage into the filter bed and drying on the surface after allowing the sludge flow on to the filter bed where sand or filtering materials have been laid

     

    02 Drying Lagoon
    A drying method to put sludge in the lagoon for precipitation, to send supernatant back to the disposal facility, and evaporate the sludge of 0.7~1.4m depth

    b. Mechanical dewatering method

    01 Vacuum dehydrator (Vacuum Filter)
    - A dewatering method where the outer circumference of spin drum is covered by filtering cloth, negative pressure(300~600mmHg) in the drum inside is maintained by a vacuum pump, and the drum rotates.

    02 Pressing dehydrator (Filter press)
    - A dewatering method to pressurize the sludge wrapped by filtering cloth

    03 Centrifugal dehydrator (Screw decanter)
    - A dewatering method by gravity after receiving centrifugal effect of 1,000~3,000G resulting from rotating movement of solid particles

    04 Belt press
    - A method to dewater the sludge continuously by one or two moving belt.
    - A dewatering method by gravity when the sludge reformed by organic polymer coagulant is injected into the belt press, and by pressure between rollers along the movement of belt.

    05 Screw press
    - A dewatering method by compressing and extruding the condensed sludge with screw

    C. Analysis by the kinds of dehydrators

    Item
    Our technology
    Existing technology
    Dewatering
    type
    Electric
    Dewatering
    Filter
    press
    Screw
    decanter
    Belt
    press
    Vacuum
    filter
    Picture
    Applied
    principle
    Electric infiltration
    Sludge supply pressure
    Centrifugal force
    Filter cloth
    Decompression filtering
    Applied
    agent
    Not applicable
    Polymer coagulant
    Polymer coagulant
    Polymer coagulant
    Polymer coagulant
    %of water
    content
    after
    dewatering
    below 65wt%
    80~70wt%
    80~70wt%
    80~70wt%
    80~70wt%
    Operating
    cost
    Electricity cost
    Added electricity cost of high pressure dewatering part
    Less power consumption ratio
    Added electricity cost of high pressure dewatering part
    big energy consumption
    Service
    pressure
    Simple compression except for power supply
    15kg/cm2
    1500~3000G
    10~20kg/m3/hr
    10~25kg/m3/hr
    Incidental
    facilities
    Steam removal facility
    Reaction facility
    Drug facility
    Cleaning facility
    Cleaning facility
    Soundproof facility
    Dedusting facility
    Reaction facility
    Drug facility
    Agitating device in Vat
    Cleaning device
    Dewatered cake discharge conveyor
    Sludge
    supply
    method
    Continuous
    Intermittent
    Continuous
    Continuous
    Continuous
    Applicability
    against
    sludge
    behavior
    change
    Good
    Good
    Bad
    Good
    Ordinary
    Others
    Disposal efficiency varies with the quantity of power supply
    Continuous work is difficult due to Batch type operation
    Solid recovery is small.
    Issue of high rotation
    Drug injection is required.
    Intoxication
    Many incidental facilities

    Principles and advantage of electric dewatering technology

    Definition of Sludge

    Sludge is called Oh-Nee in Chinese language.
    Sludge in the dictionary means a solid substance settled down from the floating matters when sewage is precipitated in water tank or reservoir.
    Diverse sludges are obtained during several stages of sewage treatment process. That is, at the first stage chemically settled sludge is obtained, then sludge activated by a drip filter is obtained, and retted sludge is obtained. Some sludge is sent to the ocean after treated with the underwater dumping method or water pumping method, some is sold as a fertilizer after being dried, and some is retted after anaerobic treatment in the water reserver like an imhoff tank or precipitation tank with microbes to reduce organic components. During the retting process, as its volume decreases, and residues are comparatively harmless, characterized of humus soil, it is filled in the land. When we see the definition of "Wastes" in Article 2, Waste Management Law, they are garbages, burnt matters, Oh-Nee, waste oil, waste acid, waste alkaline, animal corpses, and substances not required further for human life or business activity. Oh-Nee is included here in the category of waste, but the definition is not stated as a separate title and dispersed in several titles.
    To explain more easily, a mixture of solid foreign materials(microbes, etc.) input or created during the purification process of fine solids (dust, etc.) mixed in sewage and waste water - 98% of water content concentrated or condensed during the purification process - is called slurry. First-dewatered slurry, 80% of water content, is called cake sludge.

    Sludge production details

    Sewage and wastewater include fine solids (dust, etc.) mixed during the use of water and microbic solid foreign materials input or created during the purification process. At the final stage of sewage and wastewater purification process, used is a method to separate from water the foreign materials by condensing them only normally with the input of chemicals of polymer
    This condensed state is called 'Slurry'. a limp shape of 98% of water content in general (98% water, 2% solids)
    This slurry is discharged separately and goes through dewatering process. Most dehydrating equipment currently installed at the sewage and wastewater treatment plant are 'belt press dewaterers' or centrifugal separation dewaterers'. A lump of final foreign materials through such dehydration process is called 'Sludge', which is normally 80% of water content (80% water, 20% solids) characteristic of watering out when holding it in the hand and pressing it.
    Currently the technology of dehydration below 80% in average of water content in sludge does not exist all over the world. The reason is that we cannot draw internal water in the microbic cytoplasm, a major constituent of sludge.

    Technical principle of the electric dehydrator

    • To utilize "electroosmosis", one of electric inherent properties, and to utilize incidentally electro-phoresis", and "Brown motion".
    • To utilize the power supply method using voltage difference, to break sludge cell membranes, and thus to discharge water in the cell

    Sludge cell breaking process by electric dehydration

    slurry to 70%. We contribute to sludge fuel energy business by further evolving the technology which reduces 80% cake first dehydrated to 60%.

    At present our technology is introduced to domestic sewage and wastewater treatment plant and private companies for cost reduction and corporate image enhancement for improving environment. Our company is leaping toward a global environment enterprise through interchange, collaboration, and export with companies in Europe, China, USA, and Asian countries.

    We are performing a leading role in true-to-the-name electric dewatering technology by securing stability, efficiency, and technique of electric dehydrators, after overcoming previous problems by rich site application experiences

    Sludge treatment process of the electric dehydrator

    Product specification of the electric dehydrator

    Item
    Contents
    Kind of product
    Complex type electric dehydrator
    (EDG-C2400)
    Standard type electric dehydrator
    (EDG-S2400)
    Product
    picture
    Dewatered
    object
    slurry(over 98% of water content)
    sludge cake(around 80% of water content)
    %of water content
    after dehydration
    65~70%
    60±3%
    Optional
    specification
    Replacement for the existing dehydrator
    Replacement for the new dehydrator
    Secondary dehydration at the rear part of the existing dehydrator
    Belt width
    (mm)
    2,460
    2,460
    Treated
    amount
    (ton/hr)
    8~10ton
    (based on 98~98% slurry)
    1ton
    (based on 80% sludge cake)
    Power
    consumption
    (kwh)
    150
    150
    Size
    (LxWxH)
    3510x3424x3430
    3354x3510x3204
    Scope of
    supply
    Console, VAR system
    Console, VAR system
    Input principle
    Transport slurry and coagulant through pipe with a motor, agitate in the agitator, put the slurry into the input device with a slurry head (windmill type) Put into the sludge supply device, the sludge discharged from the first dehydrator and stored in the hopper, and supply it to the dehydrator in the fixed quantity in accordance with the sludge characteristics.

    Drawing of the electric dehydrator

    a. Drawing of complex type electric dehydrator(EDG-C2400)

    b. Drawing of standard type electric dehydrator(EDG-S2400)

    List of required power

    Item
    Model
    Specification
    Q'ty
    Required
    power(kw)
    Manufacture
    Required
    power
    Complex type electric dehydrator
    150Kw/3Ø/380V
    1
    146
    E&D
    Global
    Standard type electric dehydrator
    150Kw/3Ø/380V
    1
    146
    Ordinary
    power
    required
    Main driver
    1.5Kw/3Ø/220/380V
    1
    1.5
    Samyang
    Reduction
    Gear
    Drum cleanser
    0.4Kw/3Ø/220/380V
    1
    0.4
    Filter cloth cleaner
    0.4Kw/3Ø/220/380V
    1
    0.4
    Supply of fixed amount of sludge
    0.4Kw/3Ø/220/380V
    1
    1.2
    Console
    0.4Kw/3Ø/220/380V
    1
    0.4
    Vendor
    Others
    -
     
    0.1
    -
    Total
         
    150
     

    Consumable details

    No.
    Product Name
    Q'ty
    Material
    Time
    1
    Drum
    1set
    Titanium
    7,500
    2
    Filter cloth
    1set
    DM-101
    4,000
    3
    Discharge scraper
    1set
    MC NYLOM
    4,000
    4
    Drum brush
    1set
    PP
    4,000
    5
    Filter cloth belt brush
    1set
    PP
    4,000
    6
    Surge belt of the fixed quantity supply device
    1set
    PVC
    5,000
    7
    Power supply device(brush)
    1set
    Carbone(>80%)
    8,000
    8
    Mechanical valve
    1set
    PMSV2406-VA-02
    4,000
    9
    Electric valve
    1set
    Electric type/Screw type
    4,000
    10
    Limit switch
    1set
    AC220V
    1,000
    11
    Fixed quantiy supply leveller
    1set
    HILV-100
    4,000
    12
    Bearing
    1set
    UV bearing
    2,500
    13
    Cylinder
    1set
    GDC80-100
    1,000km

    * This period table may be changed according to the site conditions and user's management.
    * Replacement is requested after checking the state of consumables.

    Maintenance cost calculation and details

    Design criteria of hydrator [Operating condition of the standard type hydrator: 8 hours]

    [Design capacity based on 8~10ton/day] [based on 80% of water content]

    Item
    Design
    capacity
    Input %of
    water content
    %of water
    content in
    discharge
    Operating
    hour
    Treated
    quantity
    Sludge cake
    8~10ton/day
    80%
    60±3%
    8~10hr
    0.8~1ton

    Design criteria → Operating hour for one dehydrator is 8~10hr
    For the operation of 8~10 hours/day, one dehydrator should be installed.

    Maintenance cost

    Calculation conditions

    01 Electricity cost

    [Power consumption calculation]

    Construction
    type
    Equipment
    name
    Power
    (kw)
    Quantity(set)
    Service
    operation
    hour(hr)
    Applied load
    (kw.h.day)
    Service
    Total
    Sludge
    dewatering
    facility
    Electric
    dehydrator
    150
    1
    1
    8
    1,200

    * Calculation basis of electricity cost
    ㆍ Operating condition - dehydrator 1 set (8~10hr/day)
    ㆍ Design specification - Power consumption 150kw/set
    ㆍ Charge
    - Basic rate 150kw x 1(set) x W6,970 = W1,045,500
    - Electricity rate used 150kw x 1(set) x 8(hr/day) x W77.18= W92,616
    * 2010. 08. 01. Increase of electricity rate (about 17% increase compared with that in 2008)
    * Basic rate W6,970/Kw(Monthly)
    * Unit rate W77.18/Kwh(average per season) Unit rate in 2008 W62.55/Kwh
    * Unit rate reduced by 16% for 24 hours operation (reduction in case of night use)

    02 Water capacity

    Construction
    type
    Equipment
    name
    Used
    amount
    (m3)
    Quantity(set)
    Service
    operation
    hour(hr)
    Applied
    quanity
    (m3/day)
    Service
    Total
    Sludge
    dewatering
    facility
    Standard type electric dehydrator
    (EDG-S2400)
    1
    1
    1
    8
    8

    * Calculation basis of water capacity - Used amount(m3) x 1(set) x 8(operating hour per day) = 8m3/day

    03 Consumables and repair/maintenance costs

    * Consumable costs : calculation of consumable costs
    - Main consumables: Drum re-coating costs of the electric dehydrating device (W25mil./year/set)
    → Drum re-coating cost = W25,000,000/year

    * Repair cost : Replacements of tools and material like filters, replaced quantity, and relevant costs
    - General consumable costs : 0.5% of mechanical device costs:W2,500,000/year

    Calculation details of operation cost per ton

    Item
    Unit price
    applied
    Amount per
    day
    Yearly
    consumption
    cost
    Remarks
    Electricity
    cost
    Contract power (150Kw)
    W6,970/kw
    1,045,500
    12,546,000
     
    Electricity used
    77.18/kwh
    92,616
    30,563,280
     
    Total
       
    43,109,280
     
    Water cost
    Used water
    W917/m3
    8
    2,420,880
     
    Fuel cost
    Not applicable
    -
    -
    -
     
    Consumable cost
    Drum re-coating cost
    25,000,000
     
    8,800,000
    Yearly 1set
    (Replacement period: 7500 hrs)
    Repair/
    maintenance
    cost
    0.5% of mechanical
    equipment cost
    2,500,000
     
    2,500,000
     
    Labor cost
    Operator
    24,000,000
     
    48,000,000
    2 persons
    Total
         
    104,830,160
     
    Operating cost per ton
    (80% → 60% of water content)
    W39,708/ton

    *Excluding civil work and other utility costs

    Economy of the electric dehydrator

    Our dewatering technology uses electroosmosis and electrophoresis instead of physical force, allowing up to 60% of water content as it destruct sludge particles with electric action and dehydrate internal water. As dewatered sludge loses its intrinsic property and non-dry section, the following dry method can be simple and the cost will greatly be reduced for advantage. Besides, compared with existing technologies, its facility and operating costs can be reduced down to 1/2. It, as a realistic and core technology, can also be applied to pre-treatment technology to any sludge land treatment techniques

    Comparison of economic feasibility for the electric dehydrator (10 ton, 80% sludge cake per day)

    Item
    Unit
    Comparison before/after dehydration
    Before
    hydration
    (82%)
    After
    dehydration
    (60%)
    After
    dehydration
    (50%)
    Sludge production
    ton/day
    10
    4.5
    3.6
    Water reduction rate
    %/day
    -
    55.0
    64.0
    Power consumption
    kwh/ton
     
    130
    135
    Electric cost
    Unit
    cost
    W/Kwh
     
    80
    80
     
    Calculation
    W/day
     
    104,000
    108,000
    Sludge
    transportation
    cost
    Unit
    cost
    W/ton
    20,000
    20,000
    20,000
     
    Calculation
    W/day
    200,000
    90,000
    72,000
    Sludge
    disposal cost
    Unit
    cost
    W/ton
    60,000
    60,000
    60,000
     
    Calculation
    W/day
    600,000
    270,000
    216,000

    Economic feasibility analysis of electric dehydrator and dry system(10ton/day, 82→60% dry)

    Item
    Electric dehydrator
    Dryer system
    In case of useing LNG
    W900/m3
    In case of using kerosene
    W1,500/L
    Yearly
    energy cost
    150Kwh x 10ton x 365day x W80/Kwh
    =W43,800,000
    45m3 x 10ton x 365day x W900/m3
    =W147,825,000
    55L x 10ton x 365day x W1,500/L
    =W301,125,000
    Image
    Company

    E&D Global

    Country South Korea South Korea

    Supplier Activity

    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.

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