Chemicals are widely used in varieties of applications & a key ingredient for different industries. Chemical process is highly critical in nature. There are various processes in chemical industries.
The pH of cooling and steam processes should be tightly monitored and controlled to optimize the use of critical inputs like chemical addition for corrosion and scale protection, as well as microbial protection in cooling towers. The pH of pre-treatment water should also be monitored and controlled to prevent corrosion of feedwater piping and optimize efficiency of pre-treatment equipment.
Controlling volatile silica contaminants is critical to avoid fouling and other adverse effects in superheaters, turbines, heat exchangers,condensers and dryers, where heat transfer efficiency could ultimately impair production efficiency. Plus, monitoring silica detects demin breakthrough faster than resistivity, resulting in improved make-up water quality control.
In wastewater with high organic loads, a facility uses chemical treatment and physical processing to reduce load levels to those acceptable for either re-use or discharge into the environment. Efficient management of organics typically involves Biological Oxygen Demand (BOD) for reporting purposes. However, since the test takes 5 days, surrogates such as Chemical Oxygen Demand (COD), Total Organic Carbons (TOC), and Spectral Absorption Coefficient (SAC) may be used. These offer quicker test results and early detection of upsets or spills for reduced operational and maintenance costs. COD, a relatively simple lab procedure, reduces testing time to 2 hours. On-line TOC monitoring provides results every 7 minutes and on-line UV254 (SAC) monitors continuously for real-time control.
Total Suspended Solids measurements are commonly used for monitoring and controlling dissolved air flotation systems, dewatering equipment, clarifier influent, effluent, Return Activated Sludge (RAS) and Waste Activated Sludge (WAS). When applied to polymer feed systems, the resulting additional control often results in significant polymer savings.