Application of TECHASE® Multi Plate Screw Press in Landfill Leachate Treatment

Background: In general, landfill leachate is defined as any contaminated liquid effluent percolating through deposited waste and emitted within a landfill or dump site through external sources, of which its route of exposure and toxicity often remains unknown. It is characterized by high organic and inorganic pollutant concentrations (Bodzek et al., 2006) and is extremely toxic to the environment. The significant impacts of landfill leachate could be eutrophication of aquatic systems and toxic effects on fauna which are caused by a variety of contaminants (Lavrova and Koumanova, 2010).
The treatment of landfill leachate has always been a key issue in the environmental protection industry. Because the leachate has complex quality and strong corrosion, the anti-corrosion ability of the leachate treatment system directly affects the equipment treatment effect and subsequent follow-up.

In recent years, TECHASE® Multi Plate Screw Press has achieved great development and promotion in the landfill leachate treatment market. Compared with traditional sludge dewatering equipment, TECHASE® Multi Plate Screw Press has the characteristics of no clogging, low energy consumption, low water consumption, and fully automatic operation. In particular, with the development of new materials, in response to the highly corrosive characteristics of landfill leachate sludge, TECHASE has made great efforts to find out an innovative solution and launched the "King of New Materials" CFRP fixed rings and moving rings, which so far have been upgraded to the third generation CFRP03. It has been well proved that its corrosion resistance and wear resistance are better than traditional 304, 316 even duplex stainless steel material. It has been widely used in many solid wastes incineration plants, waste transfer stations, landfills and other projects in China.

Typical Case Study
The sludge dewatering cases of landfill leachate treatment systems shared in following all use TECHASE TECH400 series TECHASE® Multi Plate Screw Press, automatic polymer station and pumps. The sludge and polymer solution are pumped into the flocculation mixing tank and then flow into the dewatering body. After being processed by TECHASE® press, the moisture content of the output sludge achieves 80%.

Case 1: Leachate Treatment Project - Phase III - Shanghai Municipal Solid Waste Incineration Plant
(MPSP Model: TECH-403)

Case 2: Leachate Treatment Project - Baoding Landfill Incineration Power Plant
(MPSP Model: TECH-404)

Case 3: Leachate Treatment Project - Chongqing Household Waste Incineration Power Plant
(MPSP Model: TECH-353)

Case 4: Leachate Treatment Project - Phase II - Shanghai Municipal Solid Waste Incineration Plant
(MPSP Model: TECH-403)

Features & Advantages of TECHASE® Multi Plate Screw Press 
In the above projects, TECHASE® Multi Plate Screw Press has received unanimous praise from users. The main advantages of our equipment are as follows:

1) Exclusive Innovative CFRP Rings: CFRP does not react with acid, alkali and salts, has excellent corrosion resistance, and is very suitable for the treatment of highly corrosive landfill leachate. Compared with stainless steel 316 or even duplex stainless steel, CFRP rings not only improve their performance and service life, but also significantly reduce whole equipment investment and maintenance costs.

2) High Integration Flexibility: The characteristics of TECHASE® multi plate screw press are small footprint, high automation, remote control and monitor, worry-free and labor-saving operation. It perfectly meets the needs of modular container-type landfill leachate treatment system of the clients in the industry.

3) Low Operating Costs: energy saving, power saving, extremely low operating costs. The screw rotating speed of TECHASE® multi plate screw press is only 2~4r/min, and the power of a single unit is <5kW. Compared with traditional sludge dehydrator equipment, its average energy consumption is about 1/8 of the belt filter press and 1/20 of the decanter centrifuge.

4) Stronger Heart – Special Screw Shaft:The spiral shaft of TECHASE® multi plate screw press is overlayed with a super wear-resistant carbide layer, and its cladding thickness is 100 to 150 times that of the ordinary spraying process used by other peers. This process can greatly extend the service life of the screws and reduce the frequency of maintenance and replacement. 

5) Excellent Enclosure: The dewatering main body and flocculation tank of TECHASE® multi plate screw press are enclosed with cover plates and transparent tempered glass inspection windows. For projects with higher deodorization requirements, deodorization port design and sludge outlet sealing design will be added, so that effectively avoid the leakage of odor, and at the same time, the internal operation of each part can be observed and inspected.

Strong product strength is the cornerstone of TECHASE's long-term development! TECHASE advocates the innovative concept of "productization of technology and standardization of products, so that customers can afford and use them well". With products as the core and quality as the foundation, TECHASE continues to create green, innovative and practical products and solutions, and promotes sustainable environmental construction. Sustainable development promotes harmonious coexistence between man and nature.