Dealing With Refrigeration Incidents. Tools at Your Disposal

Transcription

1 Dealing With Refrigeration Incidents Tools at Your Disposal

2 AQIS Notice Meat 2001/19 Purpose of Notice Advise industry and AQIS staff on procedures to follow when there are refrigeration failures, incidents or accidents

3 Our Aim In events of failure To show: Importance of temperature history Value of predictive microbiology How to deduce temperature information To explain sampling and testing To discuss examples

4 Our Emphasis Incidents where there is distinct possibility that food safety is affected Rather than where there are: Departures from market requirements, or Breaches of EMOs or other standards

5 AQIS Notice Meat 2001/19 Implications of notice Covers: Intensity of sampling and testing If high-risk situation If medium risk Usefulness of predictive microbiology Information required

6 AQIS Notice Meat 2001/19 Implications of notice Covers: Intensity of sampling and testing If high-risk situation If medium risk Usefulness of predictive microbiology Information required

7 AQIS Notice Meat 2001/19 Implications of notice Covers: Intensity of sampling and testing If high-risk situation If medium risk Usefulness of predictive microbiology Information required

8 AQIS Notice Meat 2001/19 Implications of notice Covers: Intensity of sampling and testing If high-risk situation If medium risk Usefulness of predictive microbiology Information required

9 Refrigeration Interruption Scenarios Hot-packed offal Chilled vacuumpackaged cuts Warm-boned vacuum-packaged Freezing cartons Cartons ready for transport Chilled cartons Frozen cartons Chilling beef sides

10 Refrigeration Interruption Scenarios Hot-packed offal Chilled vacuumpackaged cuts Warm-boned vacuum-packaged Freezing cartons Cartons ready for transport Chilled cartons Frozen cartons Chilling beef sides

11 Hearts Static blast freezer Slow freezing; not fully frozen after 48 h Suspected high food safety risk Retained Faced with intensive sampling and testing Worth the cost? Can testing be avoided?

12 Hearts on stillage in blast freezer Temperature (C) Centre temperature Time from Packing (h)

13 Refrigeration Interruption Scenarios Hot-packed offal Chilled vacuumpackaged cuts Warm-boned vacuum-packaged Freezing cartons Cartons ready for transport Chilled cartons Frozen cartons Chilling beef sides

14 Chilled Vacuum-packaged Beef Primals Problem with blast chiller 60 cartons of primals stacked on two pallets Overlooked and held in block stack overnight When discovered, lids removed, cartons racked in blast

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16 Rate of cooling at different points on pallet Centre of pallet Temperature (ºC) Top, inner end, 2nd row Top carton, inner end, 100 mm down Time (h)

17 Refrigeration Interruption Scenarios Hot-packed offal Chilled vacuumpackaged cuts Warm-boned vacuum-packaged Freezing cartons Cartons ready for transport Chilled cartons Frozen cartons Chilling beef sides

18 Warm-boned Vacuum-packed Primals Approved warm boning program Beef sides boned after 2 h chill Refrigeration coils iced up, air impeded Manual defrost required

19 Warm-boned beef primals in blast chiller Temperature (ºC) Centre of carton, between cuts Air Time from Packing (h)

20 Refrigeration Interruption Scenarios Hot-packed offal Chilled vacuumpackaged cuts Warm-boned vacuum-packaged Freezing cartons Cartons ready for transport Chilled cartons Frozen cartons Chilling beef sides

21 Freezing Cartons plate freezer One plate freezer still open One plate closed Serious power blackout Many hours before resumption Can any of meat be salvaged?

22 Effect of power failure on plate freezing 35 Temperature (C) Meat temperature on entry Resumption of power Time from packing (h)

23 Freezing Cartons Off-site Part of output goes off-site to contract freeze Meat temperature after 48 h not down to 6º Cartons returned to blast for another 24 h

24 Refrigeration Interruption Scenarios Hot-packed offal Chilled vacuumpackaged cuts Warm-boned vacuum-packaged Freezing cartons Cartons ready for transport Chilled cartons Frozen cartons Chilling beef sides

25 Cartons in container ready for transport Container loaded and sealed, ready to leave for port Truck breakdown How long before refrigeration required? Consider for: a) chilled b) frozen

26 Container at 40ºC ambient temperature Temperature (ºC) Time (h) Top Corner (25mm) Top Corner (Centre) Centre of stow

27 Time for frozen meat at top corners of shipping container to warm from -18ºC to -6.7ºC Time (h) Ambient temperature (ºC)

28 Refrigeration Interruption Scenarios Hot-packed offal Chilled vacuumpackaged cuts Warm-boned vacuum-packaged Freezing cartons Cartons ready for transport Chilled cartons Frozen cartons Chilling beef sides

29 Transport of Chilled Cartons It is February Container of lamb primals Off power for over 30 h Power resumed at port You are advised 6 7 hours after resumption Can the load be salvaged?

30 Refrigeration Interruption Scenarios Hot-packed offal Chilled vacuumpackaged cuts Warm-boned vacuum-packaged Freezing cartons Cartons ready for transport Chilled cartons Frozen cartons Chilling beef sides

31 Frozen Cartons During Transport Traffic accident Container on its side Doors open, some cartons damaged Cartons transferred Off power for 12 h What is risk? Can some be salvaged?

32 Refrigeration Interruption Scenarios Hot-packed offal Chilled vacuumpackaged cuts Warm-boned vacuum-packaged Freezing cartons Cartons ready for transport Chilled cartons Frozen cartons Chilling beef sides

33 Chilling Beef Sides - Failure Chiller loaded with sides After some hours, is discovered that no refrigeration Blast chill resumed Seriousness of interruption

34 Chilling Beef Sides - Rewarming Hard fat problems Rewarm for three hours Power blackout for 2 hours Sides pushed out for boning Is product safety compromised?

35 Dealing With Refrigeration Incidents Tools at Your Disposal