The issue of environmental protection is increasingly gaining awareness.
It is one of the top priorities to conserve water, the essential resource for human survival and living.
Industrial wastewater is considered one of the main causes of water pollution. By law, wastewater must be discharged through the prescribed treatment process.
Wastewater cannot be used because it incorporates liquid, solid, and gaseous waste.
It differs from sewage, which is discarded after being used by people in daily life.
Wastewater treatment technology is categorized according to the method of treatment.
Among these, chemical treatment is used when biological or physical treatment are limited.
During the chemical treatment process, wastewater undergoes neutralization, which adds counteragents to strongly acidic or alkaline substances and dilutes the content.
In particular, when acidic wastewater enters the treatment site, it may corrode metal materials such as iron and concrete structures and cause problems.
As the neutralizing agent for acidic wastewater, caustic soda is often used.
Caustic soda is also known as sodium hydroxide and its colorless and odorless aqueous solution has a strong alkaline property.
Commonly known as lye, it has a wide range of applications throughout industries, such as for dyeing fibers and making soap.