Moving Disk Type Thickening & Dewatering Equipment N E W E X C E L L E N T T E C H N O L O G Y Moving Disk Type Thickening & Dewatering Equipment 2010. 02. 17-4, Cheonan 4th local industrial complex, Mosi-ri Jiksan-eup Cheonan-si Chungcheongnam-do, Korea, 331-814 TEL : 82-41-587-0111 FAX : 82-41-587-0555 ISO9001

1. INTRODUCTION OF COMPANY Name : O H K Co., Ltd Establishment : 1999. Jan. 14 Address : Siwha industrial complex 3Ra 805Ho Jungwang-dong, Siheung City, Kyunggi-province, Korea C. E. O : Yang Won, Nam Product 1) Thickening & Dewatering Equipment 2) Thickening Equipment 3) ACS Wastewater Treatment System 4) Ultrasonic Density Meter 5) Autoleveler Homepage : //www.ohk.co.kr

2. Industrial right & Tech. Designation 1. INTRODUCTION OF COMPANY 2. Industrial right & Tech. Designation Technology Patent Utility Model Registered Trademark Etc. Thickening & Dewatering Equipment 3 2 Thickening Equipment ACS Wastewater Treatment System 1 Tech. The kinds of Designation Administrative Machinery Date. Number Note Thickening & Dewatering Equipment Korea Good Tech.(KT) M.O.S.T. 2001.03.09 1032 Excellent Quality Product P.P.S 2001.05.07 2001026 Excellent Machine M.O.C.I.E 2001.07.21 2001-035 Energy-Saving Products K.E.M.CO 2001.12.04 E E C M.O.C.I.E 2001.12.28 2001-14 N E T M.O.E 2002.01.02 42 The first of Korea N E P M.O.C.I.E 2005.06.30 2005-1 Thickening Equipment M.O.E 2006.01.19 153 N E T Designation ACS Process N E T M.O.E 2001.02.26 11 Designation N E T M.O.E 2001.02.26 14 Verification Etc. ISO Quality management(EQA) 2000.03.29 BS/EN/ISO 9001 INNO-BIZ Company S.M.B.A 2001.11.26 1010-0759 Leading Venture Business F.K.I 2002.07.16

Moving Disk Type Thickening & Dewatering Equipment Composotion of Product Polymer dissolution Tank Flocculation, Mixing Tank Dehydrator Body Reducing Motor Sludge Cake Shute Service Tank

Moving Disk Type Thickening & Dewatering Equipment Structure Thickening & Dewatering is built in together H igh-efficiency dehydrator verified at the goverment Space required & initial Cost is minimized ET, KT, EEC Unmanned roung-the clock Operation spacer Fixed plate Moving plate Screw dividing plate Insert sludge Dewatering Cake Fixed shaft Dehydration section Thicken section Cam shaft S S Removal : Over 95% Cake Moisture content : 78±2%

Moving Disk Type Thickening & Dewatering Equipment Principle The opening between the fixed & moving plate, screw pitch narrows gradually from the concerntration part to the dehydration section. When the screw and the moving plate are rotated sludge is discharged through the opening between the fixed and moving plate generation internal pressure at the dehydration section which in turn performs dehydration with internal pressure gradually increased by the back pressure valve During the operation the moving plate continues eccentric movement to prevention clogs in the opening and discharges sludge with high-concerntration dehydration fluid through Function of clogging prevention by moving disk Filtering mechanisms ( Ref : WATER TREATMENT HANDBOOK, DEGRÉMONT ) Deposit Fixation Clogging Moving Disk Type dehydrator Prevention clogs by maintaining Liquidity the fixed & moving Disk Removal clogs using high-pressure Water & Air

Moving Disk Type Thickening & Dewatering Equipment 4. The Flow Sheet of Dehydrator

Moving Disk Type Thickening & Dewatering Equipment 5. Process Picture Auto Bar Screen Sludge Service Tank Removal a coarse material, racks, sand, vinyl, etc. Sludge the meddle storage & reacting with the chemicals of coagulation (Ferric sulfate)

Moving Disk Type Thickening & Dewatering Equipment 5. Process Picture Flow-rate regulating tank Flocculation & Mixing Tank . Flow regulation. . Injection polymer after passing V-Notch. . Sludge mixing & Flocculation as the low- speed rotation former input dehydrator

Moving Disk Type Thickening & Dewatering Equipment 5. Process Picture The Thickening section using the gravity The dehydration section by giving pressure The seperation solids & Water in the thickening section as the gravity. The thickened sludge transfer the dewatering section by the screw running the much low- speed (1.5rpm). . The performs dyhydration with internal pressure at the dehydration section

Moving Disk Type Thickening & Dewatering Equipment 5. Process Picture Inflow Sludge Dewatering Cake Discharge After Dewatering

Moving Disk Type Thickening & Dewatering Equipment 6. Advantage of product High-performance, high-efficiency dehydration at low-concerntration Over 2,000mg/L Thickening & Dewatering Cake 78±2% Activated sludge Moving Disk Type Dehydrator Dewatering Cake No thickener or retention tank is nessary, Offensive odors is solved Moving Disk Type Dehydrator Moving Disk Type Dehydrator Foul Odors Foul Odors Foul Odors Bioreactor Thickener Retention tank Dehydrator Bioreactor Thickener Retention tank Dehydrator

Moving Disk Type Thickening & Dewatering Equipment 6. Advantage of product INITIAL COST COMPARISON No noise & vibration by low-speed Structure free from abrasion Adjusting the number of rotation of the screw and moving plate may control the amount of disposal & moisture content The use of corrosion-resistant materials extended the life span of the system RUNNING COST SAVING Electic cost saving (1/4 of standard) (Thickener+Belt press type) The labor cost saving as unmanned -the-clock operation 유동판식 종래방식 Potable water saving

Moving Disk Type Thickening & Dewatering Equipment 7. SUPPLIES • Sewage & Wastewater Excess Sludge Thickening & Dewatering • Pre-treatment in the stocks raising & Excretions wastewater Treatment • Sludge Dewatering after aerobic/anaerobic digestion • Dehydration of directly low-concerntration activated sludge in the reactor • Dehydrator applied for the small, medium scale sewage treatment.

COMPARISON OF DEWATERING TYPE COMPARISON DATA COMPARISON OF DEWATERING TYPE Apply for 3,000 ㎥/d Belt Type Detanter Type Moving Disk Type 구 분 22.1 kWh 45.0 kWh 3.3 kWh Eletric power 30 ㎡ 16 ㎡ 5 ㎡ Area 13,000 kg 5,960 kg 1,500 kg Weight Ear-splitting None Noise Impossible Possible Over 8,000 mg/ℓ Over 2,000 mg/ℓ Moisture content : under 85% SS Removal : over 90% Moisture content : under 82% Moisture content : 78±2% SS Removal : over 95% Capacity dilating Sludge Conc. Efficiency Dehydrator as pressing sludge between tamis by Roller Dehydrator using th centrifugal force by high-speed rotation Screw press dehydrator without clogging by moving plate Shape & Principle

Manless working 50% application COMPARISON DATA COMPARISON OF ECONOMICAL EFFICIENCY 구 분 Moving Disk Type G B T + Belt Type Decanter (Thickening + Dewatering) 비 고 Initial Cost ￦ 176,000,000 ￦ 209,000,000 ￦ 340,000,000 15~50% Saving Annua L Cost Building interest ￦ 12,320,000 ￦ 14,630,000 ￦ 23,800,000 Annual 7% Application Depreciation ￦ 13,200,000 ￦ 20,968,000 ￦ 34,000,000 Electic Cost ￦ 1,647,360 ￦ 4,651,200 ￦ 6,602,880 Chemicals Cost ￦ 4,730,000 ￦ 5,676,000 Labor cost ￦ 15,000,000 ￦ 30,000,000원 ￦ 30,000,000 Manless working 50% application Wear & Tear Cost ￦ 200,000 ￦ 10,000,000 Upkeep & repair Cost ￦ 350,000 ￦ 400,000 ￦ 680,000 Sludge treatment Cost ￦ 13,500,000 ￦ 16,875,000 Total ￦ 60,947,360 ￦ 103,200,200 ￦ 132,633,880 40~55% Running Cost Saving 59 % 100 % 128 %

Verbalism M.O.S.T : Ministry Of Science & Technology P. P. S : Public Procurement Service M.O.C.I.E : Ministry Of Commence, Industry and Energy K. E. M. Co : Korea Energy Management Corporation M. O. E : Ministry of Environmental Republic of Korea S. M. B. A : Small and Medium Business, Adminstration F. K. I : The Federation of Korean Industries EEC : Environmental Equipment Certification NEP : New Excellent Production