ELODE Principal   1.1. What is ELODE and how does ELODE perform the dewatering process? Ans: ELDOE is highly efficient sludge dehydration equipment using the principle of electrophoresis and electro-osmosis. ELODE consists of three basic components, they are sludge conveying belt, anode drum and cathode caterpillar. First, the sludge cake generated from mechanical dehydration process, such as belt press, filter press etc is loaded onto the sludge-conveying belt of ELODE. The electro-osmosis dehydration process begin when the sludge pass through the electrodes (anode drum and cathode caterpillar). The electric field between the electrodes pushes the moisture out from the cathode caterpillar by means of the process of electrophoresis, electro-osmosis, and capillary pressure and finally destroys the cell membranes of the bonded moisture of sludge. 1.2. What is the minimum ratio of moisture level (dehydration ratio) and the percentage of reduction in cake weight can be achieved by ELODE? Ans: The minimum ratio of moisture can be achieved by ELODE depends on types of sludge. For example, minimum moisture ratio for Industrial wastewater sludge is 70 ��� 40 wt% and municipal wastewater is 60 ��� 40 wt%. The reduction in cake weight is at least 50%. 1.3. What is the average temperature of the final cake? Ans: The average temperature of final cake is 30°C~40°C. 1.4. Does ELODE encounters any problem during the dehydration process with high sludge property such as steel or other magnetic material, which has property of high conductivity and resistance to magnetic field? Ans: From the experiment result, we do not have much difficulty on treating the high conductivity sludge of having 6000 關S and above. However, it takes time to achieve the optimum setting. 1.5. Why the dehydration ratio has no much improvement when the treated sludge cake from first stage (mechanical) dehydration machine is further dehydrated again by another mechanical dehydration machine? Ans: The mechanical dehydrating methods by applying high pressure and using large amounts of coagulation and flocculation polymers, can only extract the free water contained in the liquid sludge, it can not extracts the water which is physically and chemically firmly bound to the solid molecules. Therefore, the dehydration ratio will not have significant improvement regardless of multiple dehydration process by the conventional mechanical dehydration machine. 1.6. Does the electro-osmosis process cause odor? Ans: Yes, depending on the sludge nature, there would be some occasion of heavy smell. The odor comes from steam generated during the dehydration process. There is hood facilities option to pipe out to concentration tank. 1.7. What is the material and painting specification of the ELODE machine? Ans: All metal parts except the machine frame are made of stainless steel and coated with urethane paint for long durability and high protection against corrosion. The machine frame is also coated with high corrosion resistance urethane paint. 1.8. What are the differences between SELO, BELO and GELO? Ans: SELO (Single ELODE) An electro-osmosis dehydrator specially designed for second stage of dehydration. Generally, SELO is installed after the mechanical dewatering machine such as belt press, gravity press, decanter etc. The input sludge must pre-dewater to or below 95wt% by other method of dehydration first before loading to SELO for second stage dehydration. BELO (Belt-Press Built-in ELODE) A COMPLETE dehydrator combines mechanical belt-press dehydrator for first stage of dehydration and SELO for the second stage of dehydration using highly efficient electro-osmosis dehydration to reduce the moisture level to or below 60wt%. GELO (Gravity Built-in ELODE) Another COMPLETE dehydrator combines gravity dehydrator for first stage of dehydration and SELO for the second stage of dehydration using high efficient electro-osmosis dehydration to reduce the moisture level to or below 60wt%. GELO is mainly used for paper mill industries. 1.9. What condition of sludge cake will give best electro-osmosis dehydration result? Ans: The following condition will give best electro-osmosis dehydration result: ��� Conductive of sludge cake at approximate 4000關S - 5000關S ��� Moisture contents of input cake is in between 70~90% ��� Smaller butterfat contents sludge cake 1.10. What are the safety features of ELODE? Ans: ELODE come with the following standard safety features: ��� Motor overload detector ��� Water level sensor ��� Conveyor overload detector ��� Sludge capacity overload detector ��� PLC Auto control system ��� Over-current device ��� Emergency stop ��� No spark, No static electricity ��� Designed by CE, ISO certificate 1.11. Does ELODE come with AUTO mode? Ans: Yes. AUTO mode is a standard feature of ELODE. In the even of emergency occurred during the AUTO mode, the machine will stop automatically and the emergency alarm will activate. 1.12. Does ELODE come with REMOTE control mode, such as control from the central control room? Ans: Yes. ELODE is controlled by Programmable Logic Controller (PLC) and this will enable ELODE to integrate or handshake with external controller easily. 1.13. What is the life span of ELODE machine? Ans: The life span of ELODE machine is 5 years (20,000hours) at minimum, based on 12 hours per day. 1.14. What is the average sludge dewatering cost in term of weight? What are the electrical consumption and the capacity of cake treatment? Ans: Take an example based on dewatering of municipal sludge in Korea, the average unit cost required for sludge dewatering by ELODE is less than USD8.00/MT and electricity consumption of 50~80V DC, 300~2000A depending on the type and treat capacity of sludge. 1.15. Can ELODE integrated into the existing mechanical dewatering machine such as belt press, screw press, gravity dehydrator or vacuum press, which have final cake of approximate more than 80 wt%? Ans: Yes. The Single-ELODE (Model : SELO) is specially designed to further reduce the sludge cake to as low as 50 wt% - 65%. It can be easily install at the unloading site of the first mechanical dewatering machine. 1.16. Is it necessary to add polymer to sludge before the dehydration with ELODE? Ans: Adding of polymer depends on which stage of dehydration is to be carried out. Case 1 The sludge has never been dewatered before. Generally, the moisture level is above 95wt%, thus adding of polymer is necessary. Case 2 The sludge cake has gone through the first stage of dewatering process, therefore no adding of polymer is required. By rule of thumb, adding of polymer is required before the sludge loading to the BELO and GELO, but not for the SELO. 1.17. Does ELODE equipped with safety devices to prevent any electrical incident? Ans: All electrical components are properly housed under an isolated control panel or safely enclosed by cover to prevent accident. Special devices are also installed to detect and stop high current and possible occurrence of spark. Such electrical incident will only be possible during the setting up of machine for very high conductivity or very oily sludge. 1.18. Is it suitable for ELODE to operate in tropical and severe winter regions? Ans: Adequate considerations have been taken during the designing stage of ELODE. Please refer to manufacturer for operating of ELODE in the severe winter region.