Milk Processing Lab

Expertise

The Barile lab is recognized as a leading expert of milk and dairy byproducts, including whey permeate. Almost 80% of our 125+ peer reviewed journal articles focus on the bioactive components in milk, colostrum, and other dairy products and byproducts. We have a tremendous amount of experience with the dairy industry as well as with novel and traditional dairy processing techniques applied in research and industry. As leading dairy researchers, we have received numerous awards and grants, been featured in a recent documentary, spoken at domestic and international conferences and webinars, and had our writings cited over 3,000 times. We choose to work with commercial partners to help disseminate our knowledge in an effort to increase our positive impact on the food and dairy industries.

 

Facility

Housed in the Department of Food Science across a courtyard from Dr. Barile's analytical laboratory, our state-of-the-art 800 square foot Milk Processing Laboratory was designed and built to enable collaborative and multi-disciplinary food science research to bring exciting innovations to the food industry, particularly in the realm of novel methods for the fractionation and recovery of bioactive milk components. The Milk Processing Lab provides an excellent resource for scholarly research as well as collaborations with both dairy and non-dairy industry partners.

Our facility features 110/208/480 V (single & three-phase) power supplied by eight utility stations, steam, chilled and RD water, an isolated drainage system, and HEPA filtration to ensure air quality. Additionally, the Milk Processing Lab complies with all specifications required to produce materials for clinical trials. Outside the Milk Processing Lab, we also boast over 300 square feet of ambient equipment storage to pretreat larger volumes of raw materials.

Building
  
MPL for Outlook Magazine

MPL for Outlook Magazine
Josh and Mareen using the membrane filtration unit

Josh and Mareen using the membrane filtration unit

 

Equipment overview

The Milk Processing Lab was designed to be highly flexible by having all of the equipment on wheels. All of our instruments are dairy grade and consume minimal amounts of energy and water. Our equipment reaches steady-state quickly and produces little waste.

All Microthermics equipment at the MPL is certified by Nationally Recognized Testing Laboratory (NRTL). NRTL is an organization that OSHA (Occupational Safety and Health Administration) has recognized as meeting the legal requirements in 29 CFR 1910.7. In brief, these requirements specify the capability, control programs, complete independence, and reporting and complaint handling procedures to test and certify specific types of products for workplace safety. We, therefore, have the necessary capabilities of both a product safety testing laboratory and a product certification body as required to receive OSHA recognition as an NRTL.

 

Processing systems

Raw milk processing system

  • Equipment
    • Raw milk, skim, and cream receiving tanks
    • Milk pump
    • Heat exchanger
    • Separator
  • Separates whole milk into skim and cream fractions
  • Processes 100 gallons of milk per hour
  • Recovers heat added to milk for separation
  • Maintains holding temperature of raw milk, skim milk, and cream at 5°C

Heat processing system

  • Equipment:
    • Pasteurization/UHT unit
    • Homogenizer
    • Ultra-clean filler unit
  • Pilot plant scale processing sequence to pasteurize, homogenize, and package milk, skim, and cream
  • Can perform HTST or UHT pasteurization
  • CIP cleanable

Compound isolation and purification

  • Equipment
    • Milk separator
    • Membrane filtration system
    • Desalination unit
  • Separates bioactive compounds from dairy streams to the micro-, ultra-, nano-, and reverse osmosis purities

 

Equipment

Receiving tanks

  • 2 stainless steel tanks with 100 gallon capacity
  • 1 stainless steel tank with 25 gallon capacity
  • Provides agitation
  • Jacketed with chilled water to keep milk at 5°C
  • Tank jackets can be heated by coupling with our powerful Chromalox heater
  • Used as receiving tanks for dairy products, in milk processing, and in enzymatic reactions such as casein precipitation and lactose hydrolysis
  • Manufacturer: Sprinkman Corp.
Receiving tanks
Receiving tanks

Water Circulating Temperature Heat Transfer System

  • Heats or cools water to be used with jacketed receiving tanks or heat exchanger
  • Heats water up to 250 °F
  • Open or closed-loop cooling
  • Manufacturer: Chromalox
Chromalox heater
Water circulating temperature heat transfer system

Heat Exchanger

  • Utilizes a 3-section sanitary design
    • Section 1: pre-heats cold raw milk with heat released from cooling milk in section 3
    • Section 2: Heats raw milk with hot water
    • Section 3: Cools skim milk to be held at 5°C until processing
  • Ideal for heating milk prior to separating skim from cream
  • Manufacturer: TetraPak
Heat exchanger
Heat exchanger

Milk Separator

  • Separates raw milk into skim and cream fractions
  • 100 gallon per hour capacity
  • Typically operated at 3.3 L per min
  • Best performance with milk between 21-57 °C
  • ≤0.1% skim efficiency
  • 10-40% milkfat cream
  • Manufacturer: GEA Westfalia
Cream separator
Cream separator

Pasteurizer/UHT unit

  • Can perform HTST and UHT pasteurization on milk, skim, or cream
  • Typically operated at 2 L per min
  • Pilot plant scale
  • CIP cleanable
  • Manufacturer: Microthermics
Pasteurizer
Pasteurizer/UHT unit

Homogenizer

  • Utilizes 2 homogenizing stages to maximize homogenization
  • Variable speed motor to match the flow of the pasteurizer/UHT unit
  • Sterilizable by pasteurizer/UHT unit
  • CIP cleanable
  • Manufacturer: GEA Niro Soavi
Homogenizer
Homogenizer

Filler with automatic fill control

  • Packages product appropriately for research studies including
    • Refrigerated shelf-life studies
    • Product-package interaction studies
    • Sensory panels
    • Clinical trials
  • Capable of aseptic filling
  • Ultra-clean filling environment
    • Filler hood has a shower of HEPA filtered sterile air
    • Room is HEPA filtered
  • CIP cleanable
Filler
Filler

Membrane filtration system

  • Capable of micro-, ultra-, and nano-filtration and reverse osmosis to isolate milk components
  • Critical step in separating bioactive compounds from milk
  • Highly versatile
    • Module for simultaneously screening several flat-sheet membranes
    • Module for using up to 3 larger spiral membranes
  • Available in both pilot plant and bench scales
  • Manufacturers: GEA Process Engineering (pilot plant scale), Smartflow technologies (bench-scale)
Membrane Filtration
Membrane filtration system

High-Performance Desalination unit

  • Fully automated
  • Ion exchange membranes
  • MiniCell test strand
  • 10 cell pairs
  • Purifies target compounds following membrane filtration
  • Manufacturers: Fuji Film, Magna Imperio Systems Corp.
Desalination Unit
High-performance desalination unit

Fermenters

  • Custom-designed stainless-steel fermenters
  • Frequently used for lactose and monosaccharide fermentation
  • Manufacturer: Cypress Semiconductor

 

How we can help further you research

Each dairy product and co-product has numerous potential uses and valorization strategies. Whey permeate, a co-product from whey protein production, is an excellent example of this. We have extensively studied whey permeate to unlock its hidden value in multiple commercial sectors. We want to help you discover your material's true potential.

Whey permeate infographic

 

Whether you are interested in applying established dairy techniques to your material or want to investigate novel uses of our research and equipment, we are excited to discuss all possibilities! Our relationship with every company is slightly different, however we typically follow the work-flow relationship illustrated below:

MPL infographic

 

We can help you answer a wide range of your research questions using our state-of-the-art Milk Processing Lab and our abundant experience. Below is an example (optimization of thermal processing conditions for dairy, juice, and other fluids) of how we can deliver results and answers to your research questions:

Thermal Processing Flow Chart

 

Services and rates

The Barile lab frequently aides companies in isolating and characterizing bioactive milk components, developing and preparing samples for clinical and sensory studies, studying packaging, stability testing, and formulating novel ingredients. Additionally, the Barile lab is happy to partner with companies who wish to utilize the Milk Processing Lab’s equipment for internal tests and product development. Please inquire if another methodology or area of expertise from our research would be helpful, as we can perform a wide variety of services in addition to those mentioned above.

Our recharge rates vary based on the work being performed.  Please contact Dr. Daniela Barile or Dr. Juliana Bell for more information: dbarile@ucdavis.edu, jdemourabell@ucdavis.edu.

We look forward to working with you!