Abstract:
Cleaning in place (CIP) is a method of cleaning inner surfaces of piping, vessel,
equipment, and associated fitting with disassembly. Although, the CIP processes have
been studied continually to improve efficiency for chemical consumption, the real
conventional plant operations of this process still have been considered as a large
amount of consumption. The objectives of this research are to study process behaviors
and to find out the optimal concentration of NaOH solution of the CIP cleaning
chemicals in a milk plant. This research also discusses the challenges faced by dairy
industries in implementing NaOH reduction, such as resistance from employees, and the
need for new cleaning protocols. However, the research concludes that the benefits of
reducing NaOH usage in the cleaning process in the dairy industry outweigh the
challenges, and it is a viable option for achieving greater benefits and efficiency. The
reduction in NaOH usage not only leads to cost savings and improved environmental
performance but also enhances the overall sustainability of the dairy industry.
These study aim to investigate the possibility of achieving greater benefits and efficiency
by reducing the amount of NaOH used in the clean-in-place (CIP) process in the dairy
industry. Experiments were also carried out to investigate possible reductions in
chemical use with regards to CIP, without compromising the effectiveness of the CIP
performed. The research is based on laboratory experiments and industrial case studies,
which provide insights into the impact of reducing NaOH on cleaning efficiency and the
quality of the cleaning process. Over time, the chemical and microbiological parameters
of the cleaning solutions were analyzed. The effectiveness of CIP cycles was quantified
using swabs, with a relative 2000 cfu/ml indicating a clean vessel.
It is recommended that raw milk storage tank in the dairy industry use at least a 1.2% v/v
dilution for caustic CIP cleaning cycles (based on a 99.9% wt caustic solid) for 400
second to ensure a thorough clean. Reductions in the usage of concentration of caustic
for caustic CIP cycles could yield milk industries savings of Rs, 31089.60 over per
week. (Annually Rs. 1161659.20).
