4. Conclusions
The control of environmental pH at neutral range was proven to
have the ability to prevent milk coagulation and reduce long-term
biofilm formation in milk. In dairy farms where bacteria have many
chances to develop on milk residues, pH will decrease and biofilms
will form, as observed in this study. To avoid this, pH control using
alkalis is highly advisable. Powdered lime, a very inexpensive alkali
and usually used for scattering around livestock yards and lots, has
many positive effects such as avoiding the decrease of environmental
pH and reducing bacterial biofilms. In addition, in-time
washing and frequent cleaning are also recommended.