SIZE OF WWTP 2000 m3/day (528 300 GPD)
END USER Northern Hungary regional water and wastewater utility provider, ÉRV Zrt.
CUSTOMER INWATECH Kft.
START OF OPERATION December, 2014
Issue
The client had frequent maintenance issues with their belt-filter press, therefore they decided to change it during the general reconstruction of WWTP. However, no belt-filter press manufacturer could guarantee more than 18 % DS content of sludge cake.
Solution
Esmil performed on-site pilot tests with a small MDQ model and achived 18.5-20 % cake DS content. The client was satisfied with the results and decided to purchase our equipment. Based on the required dewatering capacity, one unit of MDQ-353 C was installed. Previously installed belt-filter press is stored as a metal scrap in the territory of WWTP.
Results
| Type of sludge | Waste activated sludge from SBR |
| Unit Sludge Supply | 12-18 m3/h (53-80 GPM) 210-230 kg DS/h (463-507 lb DS/h) |
| Feed Sludge DS Concentration | 1-2 % |
| Cake DS Concentration | 18-22 % |
| Operation Time | 10 h/d |
| Average Polymer Dose | 4-6 g/kg DS (8-12 lb/ton DS) |
| Unit Daily Power Consumption | 25 kW*h |
End User’s Comment
Since the comissioning, the performance of Esmil multi-disc screw press dehydrator MDQ-353 C has been stable and with no issues. With an average feed DS content of 1 %, the cake DS content is 18-22 % while maintaining the required filtrate quality. Control cabinet is equipped with a touch screen which enables setting operational parameters both for the dehydrator and a sludge pump. Operation of the dehydrator is fully automatic, therefore it requires no attention of an operator. Besides beeing almost noiseless, the performance is also reliable and faultless. Over 3-year operation period, only wash water hoses have once been replaced.
