Dewatering operations do not need to be suspended during cleaning. As screw is been gradually increasing making the valley / volume available for the sludge narrow towards the outlet so that flocculated sludge that is concentrated by gravity filtration is further dewatered by compression. As screw rotates at a rpm which is set to give optimum output carries the dewatered concentrated sludge forward towards the end. Also the pitch of the screw flight is gradually increasing making the valley / volume available for the sludge narrow towards the outlet so that flocculated sludge that is concentrated by gravity filtration is further dewatered by compression.
There are branches and reticular structures similar to villi in appearance. If not properly treated, arbitrary emissions will cause secondary pollution. • Sludge is introduced onto the drying bed by gravity flow at a rate of 9.4 L/s and to a depth of 300 to 750 mm (12 to 30 in.).
For inquiries about our products or pricelist, please leave your email to us and we will be in touch within 24 hours. It also may be spread on agricultural land in order to make use of its value as a soil conditioner and fertilizer. Since sludge may contain toxic industrial chemicals, it is not spread on land where crops are grown for human consumption. Dewatering systems usually dewater sludge to % water and it is still very heavy. This means transferring that weight in sludge and water to the landfill. These units will dewater 40-10% water, thereby delivering a useful bio-solid as a green by-product.
The simplicity, cost-effectiveness, efficiency, and reliability of these systems have provided potential applications for such environmentally friendly technologies. Advanced wastewater purification processes involve biological treatments that are sensitive to processing parameters and to the environment. To ensure stable and reliable operations of physical, chemical, and biological processes, treatment plants quite often need to implement sophisticated technologies involving complex instrumentation and process control systems. Such innovations improve system operations significantly, thus minimizing supervision needs.
With the increase of sewage, the quantity of sludge raw materials also increases. What’s more, sludge drying disposal charging policy also brings basic development guarantee. With the improvement of living standard, various sludge qualities also brings wide development path for sludge recycling system.
When the bed is filled with sludge, the water permits the sludge to settle and initially compact against the screen so that the settled sludge acts as the filtration media. Next, the water is allowed to percolate at a controlled rate by controlling the outlet valve. After the free water has been drained, the sludge further concentrates by drainage and evaporation until it is ready for removal. In a high-density polyurethane media system, 300 mm (12-in.)-square panels with a built-in underdrain system are paved over a sloped slab. Sludge drying beds with greenhouse-type enclosures allow dewatering sludge throughout the year, regardless of the weather. Sometimes a roof is placed over the top of the drying bed, leaving the sides open.
There is a whole set of equipment which holds 10 to 200t/h output capacity. We can also customize drying machine according to customer’s demands. The system completely recovers the energy generated in the sludge incineration process, and uses it in thin film sludge dryer. Such an act enables the system to satisfy the vast majority of dry energy consumption. Using “dry and wet” method to treat the tail gas, tail gas standardized emissions is achieved.
Compared with ordinary sludge dryers, it can save nearly 20% of coal consumption and save costs for customers. The combined sludge turning and transporting system is at the heart of the drying plant. The sludge is transported through the hall virtually continuously or as an option in batches. With its double shovel the turning/transporting unit can not only aerate, break up and move the sludge through continuous shovelling but also achieve a controlled distribution of sludge in its shovels.
Because of low-temperature drying, the composition of the dried material is not affected and organic sludge can be sold as fuel, fertilizer, etc. after being dried. Because fresh air from outside is kept off, the temperature inside of the dryer is kept high, amount of moisture in the exhaust air discharging water is small, and the discharged water can be returned to wastewater treatment facilities. Sludge Dryersmanufactured byMet-Chemare designed for small, medium and large quantity sludge generators. These dryers can fit under the filter press for direct loading or can be located elsewhere in the plant. The sludge is dried by the heated liner of our unit while it is broken-up and circulated by our spiral blade system.
There are various system in dewatering process depends on the types of dewatering machine. Selecting the right type of dewatering machine is the key to optimize dewatering process. A variety of different dewatering machines are widely available for sludge treatment such as screw dewatering machine, filter press, belt press, dry bed and decanter. Belt press and decanter have some disadvantage such as low capacity, noisy and consumable parts.