92 lines
2.4 KiB
JSON
92 lines
2.4 KiB
JSON
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{
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"slug": "canning-protocol",
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"title": "Canning Protocol: Thermal Death Time & Botulism Prevention",
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"author": "Ashley Farris",
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"location": "Clover, South Carolina",
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"version": "1.0",
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"date_published": "2026-07-17",
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"wikidata_sources": [
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{
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"q_id": "Q3983325",
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"entity": "Thermal death time",
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"discoverer": "W.D. Bigelow",
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"year_discovered": 1921,
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"part_of": "food microbiology",
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"instance_of": ["physical quantity", "principle"]
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},
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{
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"q_id": "Q173514",
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"entity": "Food preservation",
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"definition": "Inhibition of microbial growth in food",
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"subclass_of": ["food and drink preparation", "preservation"],
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"part_of": "food safety"
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}
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],
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"critical_constants": {
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"ph_threshold_acidic": 4.6,
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"pressure_canner_temp_sea_level_degC": 121.0,
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"pressure_canner_psi_dial_gauge": 15,
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"boiling_water_temp_degC": 100.0,
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"f0_minimum_low_acid_food_minutes": 3.0,
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"d_value_botulism_spore_at_121C_minutes": 2.5,
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"headspace_min_inch": 0.25,
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"headspace_max_inch": 0.5,
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"peach_ph_range": [3.3, 4.0],
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"tomato_ph_range": [4.3, 4.9],
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"green_beans_ph": 5.9
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},
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"altitude_corrections": {
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"sea_level_to_2000_ft": {
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"weight_gauge_psi": 10,
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"dial_gauge_psi": 15
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},
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"2001_to_4000_ft": {
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"dial_gauge_psi": 15
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},
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"4001_to_6000_ft": {
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"dial_gauge_psi": 20
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},
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"above_6000_ft": {
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"dial_gauge_psi": 25
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}
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},
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"processing_times_by_method": {
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"boiling_water_bath": {
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"half_pint_peaches_syrup": 20,
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"pint_peaches_syrup": 25,
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"quart_peaches_syrup": 30,
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"unit": "minutes_from_boil"
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},
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"pressure_canner": {
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"pint_green_beans": 20,
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"quart_green_beans": 25,
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"pint_tomatoes": 15,
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"quart_tomatoes": 20,
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"psi_required": 15,
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"unit": "minutes_at_pressure"
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}
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},
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"failure_modes": [
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{
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"condition": "headspace < 0.25 inch",
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"result": "contents boil out, seal failure",
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"severity": "catastrophic"
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},
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{
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"condition": "headspace > 0.5 inch",
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"result": "insufficient vacuum, aerobic spoilage",
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"severity": "high"
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},
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{
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"condition": "pH > 4.6 without pressure canning",
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"result": "botulinum toxin production possible",
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"severity": "lethal"
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},
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{
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"condition": "F₀ < 3 minutes for low-acid food",
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"result": "surviving spores germinate in storage",
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"severity": "lethal"
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}
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]
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}
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