Before operating the DEMO equipment, it is essential to understand the characteristics of the sludge. Please thoroughly review the following guidelines before using the DEMO equipment, and ensure that customers are well-informed about its operating principles. This will help prevent any misunderstandings with the customer and emphasize the importance of the DEMO equipment.
Note
Never use sludge containing metals, metal powder, cement, soil, iron, copper, flammable materials, kerosene, explosive chemicals, high oil content, food waste
(e.g., animal bones, uncrushed chunks of sludge, chicken bones, meat bones, fish bones), etc.
The DEMO equipment is used to manually feed sludge to assess moisture content (drying rate), throughput, power consumption, and weight reduction rate for customer verification. Automation is not used. Automated feeding and operation are only possible with the main equipment after the sludge properties are fully understood, and customized utility devices (e.g., sludge supply devices, sludge distribution devices, thickness control devices, filter cloths, scrapers) are manufactured accordingly.
The DEMO equipment must adhere to the specified throughput and power consumption limits.
Failure to comply with these standards can cause severe equipment overload, leading to significant malfunctions.
Before operating the DEMO equipment, verify that all connections are secure, including the power supply, washing supply, air supply, drainage, fume hood, conveyor, SFD (Sludge Feeding Distributor), and SSD (Sludge Supply Device). Ensure at least 30 minutes of warm-up time. The main drum and all internal components should be thoroughly moistened, and the filter cloth must be clean.
Clean the interior and exterior of the DEMO equipment thoroughly before completing the operation to prevent any sludge residue.
If residue is left, it can harden, potentially causing severe damage to the filter cloth and equipment during the next operation. Cleaning and maintaining hygiene are crucial.
There are more than 30,000 types of organic sludge worldwide. ELODE is compatible with most organic sludge types, but the better the sludge properties, the higher the dehydration rate and the lower the electrical energy required. The ideal sludge state is immediately after primary dewatering, with intact cell water. However, as time passes after primary dewatering, sludge can naturally age, or cell water may be destroyed, resulting in reduced conductivity. In such cases, understanding the sludge properties is crucial, and adjustments may need to be made to improve dehydration efficiency.
The conveyor-based SSD (Sludge Supply Device) provided by the company is designed for low- to medium-viscosity organic sludge. It is suitable for non-sticky organic sludge that does not adhere to the screw and can be transported automatically. If the sludge has a high organic content or is highly adhesive, it may stick to the screw, making automatic feeding impossible, as shown in the photo. Therefore, if an automatic sludge supply system is desired, the viscosity and organic content of the sludge should be pre-checked to determine the appropriate supply device.
When the sludge condition is not ideal or it is challenging to use an automatic supply device, manual feeding is recommended. Operators should manually add sludge by climbing onto the eq uipment and gradually feeding small amounts along the center line while monitoring the results. Large amounts of sludge should never be added at once, nor should the specified throughput be exceeded, as this can severely damage the equipment. Treat the equipment with care, as if it were your own, and after each operation, clean the interior and exterior with water to prevent residue buildup and ensure smooth operation for the next use.
For high-organic and highly adhesive sludge that requires automatic supply, the German-made NETZSCH sludge supply pump is recommended. You can visit their website to find a nearby distributor. By providing them with the sludge properties, they will be able to select and install the appropriate mono pump for you.
Low-viscosity sludge distribution device. When supplying the DEMO equipment, two types of sludge distribution devices are provided. The left distribution device is for low-viscosity sludge, and it is generally used for most standard wastewater sludge
High-viscosity sludge distribution device. For high-viscosity or fine sludge, this device is attached and used. The inverter adjusts the speed of the rotating blades based on the sludge’s viscosity and particle size, with control settings from 0 to 60 cycles available on the PLC panel. Be sure to check that the blade direction is correct.
Measures conductivity after diluting the polymer before primary dewatering. Collect and measure the filtrate from the discharge pipe after secondary dewatering by ELODE for comparison.
Before feeding sludge into ELODE, extract samples from various depths (bottom, middle) and measure the moisture content at least five times to establish a baseline value. Compare with measurements taken after dewatering by ELODE using the same method.
Weigh a 10kg sludge sample before dewatering, and then weigh it again after dewatering with ELODE to assess weight reduction.
Used to measure the temperature of the drum, the temperature of the discharged cake, and for heat detection on the PLC.
Useful for handling sludge during operations.
To record the sludge dewatering process, which can be edited and presented to customers as proof of performance.
To record the sludge dewatering process, which can be edited and presented to customers as proof of performance.
Model | Maximum Throughput (Minimum Throughput with 4mm Thickness) / Hour and Considerations) | Minimum Throughput / Hour |
EOD-500S | 8mmT*1.2*60*450mmW(Max.Belt width) = about 260kg | About 130kg |
EOD-1000S | 8mmT*1.2*60*900mmW(Max.Belt width) = about 518kg | About 259kg |
EOD-2000S | 8mmT*1.2*60*1800mmW(Max.Belt width) = about 1036kg | About 518kg |
EOD-3000S | 8mmT*1.2*60*2800mmW(Max.Belt width) = about 1612kg | About 806kg |
If the moisture content of the incoming sludge is 1% higher, the throughput decreases by an average of 3%. However, due to significant variations in sludge characteristics such as organic content, conductivity, particle size, and viscosity, thorough testing with the DEMO equipment is essential. The test results should then be used to negotiate and set expectations with the customer.
The primary purpose of operating the DEMO equipment is to demonstrate to the customer the range of capabilities that ELODE can reliably achieve. It is important to note that ELODE is not suitable for all types of sludge.
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