Application - Industrial Water - Food

Most Frequently Asked Questions  

Parameter Purpose of Test Method
COD
Chemical Oxygen Demand
Used as a surrogate for BOD, and for effluent reporting when allowed by discharge permit. Provides a measure of organic "food" available to biological treatment steps and an estimate of the effect of the plant effluent on the receiving body. Can be correlated to BOD on a plant-by-plant basis, if influent characteristics are constant. 8000
10067
Chlorine, Free
Data used to control Chlorine based disinfection processes, required for reporting at POE and in the distribution system, also used in monitoring in the distribution system during flushing and line break maintenance. EPA Primary DW Standard at 4.0 mg/L as CL2. 8021
10231
Chlorine, Total
Data used to control Chlorine based disinfection processes, required for reporting at POE and in the distribution system, also used in monitoring in the distribution system during flushing and line break maintenance. EPA Primary DW Standard at 4.0 mg/L as CL2. 8167
10070
10232
Ammonia Control ammonia-based pH control additives, corrosion of copper and zinc alloys in boilers. Monitor/control waste treatment processes and nitrogen content of effluent. 8038
10031
10205
pH (buffer) tandardize pH meters for control of pH throughout plant. Monitor acid content, flavor stability and/or contamination. pH meter & electrode - see instrument manual
Phosphate, Total Can be used as a corrosion inhibitor in cooling systems and drinking water distribution systems. Also used as a boiler treatment, to precipitate calcium and avoid calcium sulfate scale formation on surfaces. Total phosphate includes reactive (ortho), inorganic (poly) and organic forms. May be regulated in facility wastewater. 8190
10209
10210
Phosphate, Reactive LR Can be used as a corrosion inhibitor in cooling systems. Also used as a boiler treatment, to precipitate calcium and avoid calcium sulfate scale formation on surfaces. 8048
8178
10209
TKN
Total Kjeldahl Nitrogen
Total of organic and ammonia forms of nitrogen. Used to assess waste treatment processes/effluents. Also used in protein determination on products. 8075
BOD
Biochemical Oxygen Demand
Provides a relative measure of "food" available to biological treatment process steps, the degree of stabilization of the wastewater and an estimate of the effect of the effluent on the receiving water body. Used for plant loading/design considerations and EPA reporting. 5 day test period is too slow for process control - many plants use COD or TOC as an estimate. 8043
8215
Nitrogen, Total Monitor nitrogen (nutrient) properties of plant effluent. Also used to monitor product qualities. 10071
10072
10208

Also Consider  

Parameter Purpose of Test Method
Iron Can cause deposits in water lines, boilers, etc. Causes stains. Can interfere with industrial processes (dying, tanning, papermaking, etc.) May indicate corrosion. 8008
8147
8112
10229
Phosphate, Reactive HR Can be used as a corrosion inhibitor in cooling systems. Also used as a boiler treatment, to precipitate calcium and avoid calcium sulfate scale formation on surfaces. 8178
8114
Molybdenum, HR Anodic corrosion inhibitor for cooling systems. 8169
Chloride Monitor incoming water/control salt content for taste consistency/health issues. 8206
8207
8225
Alkalinity Control corrosionand/or scaling in boilers and cooling systems. Also used to adjust product water. 8203
8221