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Exploring Washing Procedures for Produce Brush Washer.

Catherine Gensler1, Kelsi Harper1, Sloane Stoufer1

  • 1Department of Food Science, University of Massachusetts, Amherst, Massachusetts, USA.

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|July 6, 2023
PubMed
Summary

Effective sanitation of produce brush washer machines requires chlorine solutions. At least 100 parts per million (ppm) of chlorine effectively reduces bacterial loads by approximately 4 log colony-forming units (CFU) per brush roller.

Keywords:
Brush washerExtension educationPostharvest processingProduce safetySanitation proceduresSmall-scale farming

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Area of Science:

  • Food Safety
  • Microbiology
  • Environmental Sanitation

Background:

  • Inconsistent cleaning practices for produce brush washer machines have been observed in food production facilities.
  • Effective sanitation procedures are crucial to prevent microbial contamination of fresh produce.

Purpose of the Study:

  • To evaluate the efficacy of different chlorine solution concentrations and water-only rinses in reducing bacterial loads on produce brush washer machines.
  • To determine optimal sanitation protocols for hard-to-clean food processing equipment.

Main Methods:

  • Testing four chlorine solution treatments (25-200 ppm) and a water-only rinse on a small brush washer machine.
  • Measuring bacterial load reduction in log colony-forming units (CFU) per brush roller.
  • Statistical analysis (p > 0.05) to determine significant differences in bacterial reduction.

Main Results:

  • Water-only rinsing resulted in non-significant bacterial reductions (0.91-1.96 log CFU).
  • Chlorine treatments significantly reduced bacterial loads, with higher concentrations being more effective.
  • 100 ppm and 200 ppm chlorine treatments achieved approximately 4 log CFU reductions, comparable to post-process decontamination levels.

Conclusions:

  • Chlorine sanitizer solutions, particularly at 100 ppm or higher, are effective for sanitizing produce washing machines.
  • Implementing chlorine-based sanitation protocols can significantly enhance food safety by reducing microbial contamination.
  • These findings provide evidence-based recommendations for improving sanitation practices in the produce processing industry.