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Related Concept Videos

Methods of Medium Optimization01:28

Methods of Medium Optimization

Optimizing growth media enhances microbial proliferation and maximizes product yield. Statistical experimental design methodologies provide structured and reproducible approaches, offering progressively higher levels of robustness and efficiency.The One-Factor-at-a-Time (OFAT) MethodThe One-Factor-at-a-Time (OFAT) method involves adjusting a single variable while keeping all others constant. However, it cannot detect interactions between variables, often leading to suboptimal outcomes when...
Mismatch Repair01:20

Mismatch Repair

Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
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Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving01:29

Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving

Mechanistic models play a crucial role in algorithms for numerical problem-solving, particularly in nonlinear mixed effects modeling (NMEM). These models aim to minimize specific objective functions by evaluating various parameter estimates, leading to the development of systematic algorithms. In some cases, linearization techniques approximate the model using linear equations.
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Since the discovery of the two BER pathways, there has been a debate about how a cell chooses one pathway over the other and the factors determining this selection. Numerous in vitro experiments have pointed out multiple determinants for the sub-pathway selection. These are:
Optimization Problems01:26

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Optimization problems often involve identifying maximum or minimum values under specific constraints. A well-known example is determining the longest horizontal pipe that can be moved around a right-angled corner, where a 3-meter-wide hallway meets a 2-meter-wide hallway. This scenario, common in architectural design and industrial transport, can be understood conceptually through geometric and trigonometric reasoning.To visualize the problem, consider the pipe as a straight line that touches...
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Related Experiment Video

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Generic Protocol for Optimization of Heterologous Protein Production Using Automated Microbioreactor Technology
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Generic Protocol for Optimization of Heterologous Protein Production Using Automated Microbioreactor Technology

Published on: December 15, 2017

MARAPUR--a new process combination for the optimization of MBR.

F Klegraf1, J Lahnsteiner

  • 1VA TECH WABAG GmbH, Siemensstrasse 89, 1211, Vienna, Austria. ferdinand.klegraf@wabag.com

Water Science and Technology : a Journal of the International Association on Water Pollution Research
|December 19, 2008
PubMed
Summary

The MARAPUR concept utilizes membrane bioreactors (MBR) for efficient wastewater treatment. Fine sieving prevents membrane clogging, ensuring reliable operation and reduced chemical cleaning needs.

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Last Updated: Jun 27, 2026

Generic Protocol for Optimization of Heterologous Protein Production Using Automated Microbioreactor Technology
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Published on: December 15, 2017

Updated Protocol for the Assembly and Use of the Minibioreactor Array (MBRA)
09:38

Updated Protocol for the Assembly and Use of the Minibioreactor Array (MBRA)

Published on: September 5, 2025

Area of Science:

  • Environmental Engineering
  • Water Treatment Technologies

Background:

  • Membrane bioreactors (MBR) are advanced systems for wastewater treatment.
  • Effective prevention of membrane fouling is crucial for MBR operational reliability.

Purpose of the Study:

  • To introduce the MARAPUR concept, a novel MBR-based wastewater treatment process.
  • To highlight the advantages of the MARAPUR concept, including enhanced filtration and reduced chemical usage.

Main Methods:

  • The MARAPUR concept employs ultrafiltration of activated sludge using pressure-driven hollow fiber membranes.
  • Vertical membrane modules are integrated into a compact MEGAMODUL system.
  • Permeate extraction is performed in a cross-flow configuration, supported by rinsing aeration.
  • Wastewater fine sieving with a 0.25 mm mesh size is implemented.

Main Results:

  • The process achieves high filtration performance.
  • Excellent operational reliability is demonstrated.
  • A reduced demand for cleaning chemicals is observed.
  • Fine sieving effectively prevents membrane clogging from hair and fibers.

Conclusions:

  • The MARAPUR concept offers a robust and efficient solution for biological wastewater treatment.
  • The integration of fine sieving significantly enhances membrane longevity and process stability.
  • This approach leads to improved overall wastewater treatment efficacy and sustainability.