Filter Press for Lignin-black liquor filtration

Filter presses is the best filtration technology used to filter lignin –black liquor resulting from bioethanol production or also in the lignoboost process. This case study it is focus on the filter press use for the filtration of lignin – black liquor resulting from bioethanol production. On the second generation bioethanol plants the filter press can be used in two different steps of the production depend from the process layout.

Case Study

Feed Details

Feed : Lignin
Conc. : 7-8% (w/w)
Qty. : > 20 DMTPH
Feed T : 65-85 Deg C

Desired Output Parameters

Filtered Cake Moisture: ≤ 45-55% (w/w)

Process Engineering

A representative sample of lignin –black liquor is collected & tested in Dewater Filter Press R & D Laboratory in Italy in a lab scale Filter Press.
The first step was to clearly understand the lignin –black liquor slurry chemical & physical characteristics & tests such as elemental analysis, dimensional Particle size analysis, IR Spectroscopic analysis, XRD Crystalline Phase analysis were conducted.

Subsequently multiple filtration tests were conducted on the lignin sample by altering

  • filter press plate configurations,
  • chamber thickness,
  • feeding,
  • squeezing,
  • cake blowing pressures & time

to define the optimum filtration parameters to reach the performance parameters required by the customer.

Result (Dry Cake)

Filtered Cake of Lignin-Black Liquior from Bio Ethanol Production

Filter Press & its ancillaries sizing

The Filtration test results from the lignin-black-liquor sample provided us the optimum process parameters to make the sizing of the Filter Press & all the associated ancillary equipment.

The Filter Press & the ancillaries are sized considering the results from the filtration test.

Recommended solution

Membrane plate configuration is selected for this bio ethanol project.

We recommended the customer for 05 Nos. Dewater HP Model Filter Press to reach the total capacity with desired Filter Press performance parameters.

*Our projects are covered under non-disclosure agreement. Hence specific process input-output details can not be shared.
**Please contact us for your specific requirements & we will be happy to assist & support.

We deliver smart filtration solutions at lowest cost/ton of operating cost