Beverage Filtration Using Split Pasteurization and Microfiltration

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Solution Overview

Problem

Existing beverage processing methods, such as pasteurization, compromise flavor and nutrient content while reducing microbial load, particularly in fruit and vegetable juices, leading to a need for a system that maintains flavor and nutrients while achieving microbial reduction.

Innovation Solution

A filtration system utilizing cross-flow ultrafiltration and direct flow microfiltration separates beverages into solids and liquid fractions, treating each separately; the solids are pasteurized, and the liquids are microfiltered without heating, then combined to produce a filtered beverage with reduced microbial load and improved shelf stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If pasteurization is applied to reduce microbial load, then shelf life is extended, but flavor profile and micronutrients are altered or deteriorated

Engineering Contradiction:

Improveshelf lifeVSAvoidflavor degradation and nutrient loss

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The beverage is divided into two separate fractions: a solids fraction containing microorganisms and a liquid fraction containing flavor compounds and nutrients. This segmentation allows each fraction to be treated independently - the solids are pasteurized while the liquid is microfiltered, preventing thermal damage to flavor and nutrients.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Microorganisms are extracted from the liquid beverage through ultrafiltration and concentrated in the solids fraction. This extraction allows pasteurization to be applied only to the solids, leaving the liquid fraction intact with its flavor and nutrient properties preserved.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If conventional pasteurization is used, then microbial load is reduced, but thermally labile compounds like vitamin C are degraded

Engineering Contradiction:

Improvemicrobial reductionVSAvoidvitamin C and other thermally labile compounds

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The beverage components are segmented into heat-sensitive liquid fraction and heat-tolerant solids fraction. This allows selective thermal processing of only the solids, preserving vitamin C and other thermally labile compounds in the liquid portion.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

An ultrafiltration membrane acts as an intermediary that separates microorganisms from flavor compounds and nutrients. This intermediary enables microbial removal through solids pasteurization without direct thermal exposure of the liquid containing sensitive compounds.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Object-affected harmful factors

If NFC juice is used to improve flavor, then texture and taste are enhanced, but microbial load remains high reducing shelf life

Engineering Contradiction:

Improveflavor qualityVSAvoidshelf life

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The NFC juice is segmented into solids fraction (containing microbes) and liquid fraction (containing flavor). The solids are pasteurized while the liquid is microfiltered, allowing shelf life extension without compromising the superior flavor and texture of NFC juice.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Traditional thermal pasteurization is replaced with a combination of ultrafiltration separation and microfiltration. This mechanical filtration system removes microorganisms without thermal processing, preserving the flavor quality of NFC juice while extending shelf life.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The method preserves flavor and nutrients, achieving a microbial reduction comparable to pasteurized beverages while maintaining a taste profile similar to freshly squeezed juices and extending shelf life.

Implementation Method 1

filtering a raw beverage using a cross-flow ultrafiltration device to produce a solids fraction and a liquid fraction

Methodology Applied

Scientific EffectUltrafiltration: Semipermeable Membrane

Implementation Method 2

heating the solids fraction to a temperature of 60° C. or greater to produce a pasteurized solids fraction

Methodology Applied

Scientific EffectThermal pasteurization: Heating

Implementation Method 3

microfiltering the liquid fraction through a microfilter having a size cut-off of 1 μm or smaller to produce a microfiltered liquid fraction

Methodology Applied

Scientific EffectMicrofiltration: Semipermeable Membrane

Data Source

PatentUS20260033520A1System and method for filtering beverages

Publication Date: 2026.02.05 DONALDSON CO INC

AI summary

A method for preparing a filtered beverage includes filtering a raw beverage using a cross-flow ultrafiltration device to produce a solids fraction and a liquid fraction; heating the solids fraction to a temperature of 60° C. or greater to produce a pasteurized solids fraction; microfiltering the liquid fraction through a microfilter having a size cut-off of 1 μm or smaller to produce a microfiltered liquid fraction; and combining the pasteurized solids fraction and the microfiltered liquid fraction to result in the filtered beverage.