Using Filter Press for Municipal Wastewater

What is municipal wastewater? It mainly refers to the sewage from domestic wastewater, some industrial waster that allowed to be discharged, and rainwater. For municipal sludge, it’s different from industrial sludge. Normally it does not contain toxic elements, such as heavy metal, acid, etc., however, it’s very viscous. Additionally, after pretreatment, the solid percentage is very low. So normal chamber type plate filter cannot work well and has very lower efficiency. Thus in wastewater treatment plants, namely WTP, they adopt a chamber membrane filter press for sludge dry stack. Because the membrane filter press machine can squeeze the filter cake twice to ensure lower cake moisture. This can greatly save the subsequent sludge processing cost.

filter press is tools used in separation processes solids and liquids. The device stacks many filter elements, it is easy to open the filter to remove filtered solids, and it is easy to clean and replace the filter media. Filter presses cannot be run in a continuous process, but they can provide very high efficiencies, especially when low levels of liquid residual in solids are required. Filter press is used in marble mills to separate water from sludge and reuse it in the marble cutting process.
 

While operating a membrane filter press machine, we must pay attention to the following points

(1)Pressure Difference. The cake squeezing pressure is higher than feed pressure and suggests not too much higher than feed pressure. The more pressure difference, the more deform of membrane plates, then will shorten filter plate’s lifespan or even damage plates.

(2)Additionally, after the filtering process finished, before open the filter plates, it strictly must discharge the membrane squeeze pressure in advance. If not, it will also damage membrane filter plates.

Features of municipal wastewater membrane filter press

• Good dewatering result. The filter cake moisture can reach around 50-60%.

• Filter plate adopts high-pressure membrane filter plates.

• Sludge can be secondarily squeezed so that has higher filtration efficiency.

• If the filter press machine is controlled by PLC it will save laborers.

Well, due to the protest message from our dear audience, we decided to edit this article… ^^

  Steps of making a filter press machine 

To make and design a filter press, we make and design a filter press using design principles and with knowledge of technical specifications. This requires having several years of experience and having full knowledge and knowledge about this issue.

Design, procurement and preparation of steel and cast parts –

Cutting of steel parts and machining of filter press machine arms –

Flooring filter press plates and filter press frames –

Drilling and mounting the handle on the filter press and frame plates –

 Stonework of cast parts and quality control of parts in terms of cast quality –

Assembling the arms, initial and final parts of the filter press machine –

Construction of hydraulic unit set –

Installing the hydraulic unit on the chassis –

Assembly of plates on the chassis –

Turning on the hydraulic system and testing different parts –

Dismantling plates and hydraulic unit –

Reassembly and final testing –

  Advantages of using filter press 

The advantages of the filter press machine include high efficiency, reducing environmental pollutants and purifying all kinds of toxic and harmful industrial substances, saving resources and energy, resistance to pressure and temperature.

?What advantages does the filter press have over other separation methods

More efficiency and effectiveness –

Lower operating costs –

Reduction of operating costs related to separation and crushing of solids, more economical –

Lower output impurity volume and savings in the transfer and storage process (high efficiency) –

The possibility of more effective and high-quality purification of liquids and solids –

Automatic operation, which depends on whether the filter press is fully automatic, semi-automatic or manual. The automatic operation of the filter press makes more time available for other operations. In case of basic use of the filter press device, filter press will only need to be serviced and cleaned once a month. Of course, for each filtering time, about a quarter of the service time is required to open and close the device. and

?What are the benefits of using a filter press machine

Dewatering sludge that is difficult to dewater –

The possibility of increasing the capacity of the device –

Production of cake with high solid percentage –

Very high absorption of solids –

Easy repair and the possibility of changing accessories –

Low consumption of compressed air –

No need for vacuum pumps –

Very low consumption of compressed air –

Saving water and manpower –

Increasing production efficiency –

Very high efficiency in removing suspended particles –

Increasing the safety and ease of wastewater treatment –

Pollution control and reduction –

No use of coagulant chemicals –

 FAQs in the field of filter press and accessorise

?What is filter press fabric measuring unit
.Fabrics are usually graded based on aeration rateand microns

?What are the types of pumps that can be used for filter press and which type is more suitable

:Generally, the pumps used in the filter press are of three types

Diaphragm pump (8 bar pressure using wind)

Vane pump (4 bar pressure with dynamo)

.Mono pump which is selected according to your type of activity

The use of more powerful pumps depends on the specific design determined in advance and consultation with the technical officer. a