Products & Services BioOptimal™ MF-SL Microfilters

Easy and Effective Clarification Made Possible

BioOptimal MF-SL is a hollow fiber microfilter that utilizes an efficient filtration mechanism based on size exclusion and tangential flow filtration. These two aspects allow the filter to smoothly and effectively separate the contents of a solution.
Quick links to selected Data Sheets, Product Manuals or Validation Reports related to the product.


Process simplification

BioOptimal MF-SL is able to clarify solutions quickly and completely in a single processing step. Therefore, it simplifies the cell culture clarification process and makes it more cost-effective by eliminating the needs for large investments like centrifuges and expensive disposable items like other depth filters.

Features & Performances

Key Features

  • Low TMP (Trans Membrane Pressure)
  • High flux, short filtration time
  • High protein permeability & recovery rate
  • Very low permeate turbidity, less bioburden
  • Low pressure stress at filtration process

Basic Information

Tangential Flow Filtration:

The feed fluid flow across the membrane surface creates a sweeping action, preventing quick fouling and extending filtration duration.


Removal of cells from batch culture

Filtration Volume vs. Filtration Time
Test Conditions
Cell Culture Type: CHO-S
Filtration Mode: Tangential Flow Filtration
Shear Rate: 3000 s-1
TMP: No Control (= 3-6 KPa)
  Cell Density x 106 (cells/mL) Cell Viability (%) Turbidity (NTU)
Before After
Low viability 13.9 26 1578 16.7
Medium viability 18.5 87.2 1806 5.2
High viability 11 99.5 1010 4.3

TFF-Perfusion cell culture evaluations

Monoclonal Antibody (mAb) is one of the main focus categories in biopharmaceuticals. There are several types of cell culture systems such as fed-batch and perfusion culture. Although conventional batch systems are widely accepted in the current process, perfusion based cell culture systems offer the potential to greatly increase cell density and productivity for a long term periods. It is widely accepted that hollow fiber works as a cell separation device in perfusion culture.
We conducted to evaluate the performance of perfusion cell culture in TFF (Tangential Flow Filtration) system.
TFF Perfusion set-up
Test Conditions:
  • Cell culture: Antibody-producing Chinese hamster ovary (CHO) cells were cultivated in serum free media.
  • Cell density was maintained at 50-70 ×106 cells/mL by bleeding.
  • Medium exchange rate: 0.75-2.5 vessel/day
  • Permeate flux: 0.24-0.80 L/m2/h (LMH)
  • Bioreactor working volume was adjusted by membrane area.
  • Flow rate (L/min) was adjusted so that the shear rate inside of hollow fiber became 1500 s-1.

Figure mAb Permebility

Specifications & Parameters

Material Specifications
Pore size (μm) 0.4
Hollow fiber ID (mm) 1.4
Hollow fiber material Polysulfone
Hollow fiber housing Polysulfone

Ordering information

Catalog Numbers
Catalog Number Effective Membrane Surface Area Size
MFSL0005 0.005 m²
MFSL0190 0.19 m²
MFSL1000 1 m²
MFSL8000 8 m²