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REDUCING SODIUM HYDROXIDE IN PROCESS CLEANINGUMASS LOWELL - TURI
Learning with Purpose
OUTLINEREDUCING SODIUM HYDROXIDE IN PROCESS CLEANING
B k d• Background• Method• Preliminary results• Preliminary results• Potential recommendations• Next Steps• Next Steps• Acknowledgements
Learning with Purpose
BACKGROUND
• Sodium hydroxide (NaOH) is widely used in combination with hydrogen peroxide (H2O2) as an effective FCS cleaner.
• NaOH (Caustic Soda) is classified as toxic chemical by• NaOH (Caustic Soda) is classified as toxic chemical by Toxic Use Reduction Act (TURA).
• When used in large quantity it pose significant chemicalWhen used in large quantity it pose significant chemical hazards to the processed food, employees and the environment
Learning with Purpose
OBJECTIVES
1 E t bli h i i t ti f N OH/ H O• 1. Establish a minimum concentration of NaOH/ H2O2 for cleaning-in-place (CIP) at Kettle Cuisine (KC).
• 2. Identify and test green alternatives of caustic soda for CIP processes. p
• 3. Reduce down-time, energy and labor cost for CIP processes.
Learning with Purpose
METHOD
Scaling and weight: place stainless steel (SS)316 coupons in Mac & Cheese heat at 180°F for 3 hoursCheese, heat at 180 F for 3 hours.
Cleaning with NaOH/ H2O2 and g / 2 2 weight: different concentration
and temperature.
Physical scrubbing with diluted phosphoric acid.
QC ‐ ATP measurement
Learning with Purpose
QC ‐ ATP measurement
MEASUREMENT
• Dry weight changes among different steps• QC ATP test• QC – ATP test
– ATP, the energy molecule found in all living things, making it a perfect indicator to determine if a surface is clean or not.
– To ensure no product contamination or biofilm development presents on SS surface.
– The amount of ATP present in the sample providingThe amount of ATP present in the sample, providing information on the level of contamination.
Learning with Purpose
PRELIMINARY RESULTS
Table 1. Alternative experiments associated with concentration of NaOH/H2O2 and p / 2 2descaling temperature. 100% = simulated KC’s application (250 gallons of H2O, 8 lbs of HCL‐5000, 2 lbs of H2O2). Size of coupon: 1.5 inch x 1.5 inch.
TemperatureConc. Of NaOH/H2O2
100% 75% 50%
82°C √ √ √
75°C √
65°C √
Learning with Purpose
PRELIMINARY RESULTS – DOSE
DE‐SCALE RATIO ATP TEST
101102103
atio
DE SCALE RATIO
10
12
14
LU)
ATP TEST
‐‐ 82°C ‐‐ 82°C
96979899100
idue
Rem
oval Ra
4
6
8
10
ATP values (R
L
939495
100% 75% 50%
Resi
Concentration of NaOH/H2O2
0
2
100% 75% 50%Concentration of NaOH/H2O2Concentration of NaOH/H2O2 Concentration of NaOH/H2O2
Figure 1. (A) Weight removal test and (B) ATP test of SS316 coupons under 82 °C cleaning temperature RLU: relative light unit 0‐10 RLU: good; 11‐30 RLU: caution; over
(A) (B)
Learning with Purpose
cleaning temperature. RLU: relative light unit. 0 10 RLU: good; 11 30 RLU: caution; over 30 RLU: failure.
PRELIMINARY RESULTS - TEMPERATURE
14
ATP TEST ‐‐ 75% NaOH/H2O2
8
10
12
lues (R
LU)
2
4
6
ATP va
082°C 75°C 65°C
Concentration of NaOH/H2O2
Learning with Purpose
RESULTS
Cl i ff t f 75% N OH/H O ith 82 °C 75 °C• Cleaning effect of 75% NaOH/H2O2 with 82 °C, 75 °C, and 65 °C is able to pass ATP test.
• Cleaning effect of 50% NaOH/H2O2 with 82 °C is able to pass ATP test, but its ATP values are higher than that p gof 75% NaOH/H2O2 .
Learning with Purpose
POTENTIAL RECOMMENDATIONS
• In 2015 44,662 lbs of sodium hydroxide was used in the l icleaning process.
• It was anticipated that by 2017 taking production growth into account an additional 9 379 pounds per year wouldinto account, an additional 9,379 pounds per year would be used.
• Results show using 75% NaOH, considered as the new dosing concentration, about 15% (3.5 Tons) can be reduce annually while achieving same ATP results as 100%.
• Reduce CIP temperature to 65oC = savings on energy bill!
Learning with Purpose
NEXT STEPS
• Continuing to evaluate the concentration of NaOH/H2O2(50%) ith t t 82°C d 50°C(50%) with temperature 82°C and 50°C.
• Screening alternatives will investigate the following: Phix XIVPhix XIV Chlorine Materials Hydrogen peroxideHydrogen peroxide Ozone Peracetic acid/peroxyacetic acidPeracetic acid/peroxyacetic acid Phosphoric acidPotassium hydroxide
Learning with Purpose
Potassium hydroxide
T i U R d i I i• Toxics Use Reduction Institute
• Kettle Cuisine; AlanACKNOWLEDGEMENTS
• Xiaobo Liu, Manyun Yang,
D i K jDuniya Kajang
Learning with Purpose