Page 31 - Industrial Wastewater Treatment, Recycling and Reuse

14 Industrial Wastewater Treatment, Recycling, and Reuse

Table 1.3 Recommended Format for Effluent Characterization
Normal Maximum
Parameter reading value Desired value a Unit
Wastewater flow NA Lph
rate
pH of wastewater 6.5–8.5
Color of No noticeable color
wastewater
Odor No offensive odor

Density 1 @20 C g/cc

Viscosity 1 @20 C cP
Chemical oxygen <250 for most industrial mg/L
demand, COD waters
Biological oxygen 10–30 for most industrial mg/L
demand, BOD waters
Total suspended 100 mg/L
solids, TSS
Total dissolved 2100 mg/L
solids, TDS
Ammoniacal 30–50 for most industrial mg/L
nitrogen/total waters
nitrogen
Total phosphorus <2 mg/L
Metals present (Cu, Cr, Ni, Pb, etc.) mg/L
(e.g., Cu, Mn) usually well below 5
Total inorganics Sulfates—1000 mg/L
content Chlorides—1000
Specify nature
of components
Total organics Phenolics <5 mg/L
content
Specify nature
of components
Oil content 10–20 mg/L
Toxic/nontoxic Nontoxic
Any other Suitable for discharge/
information suitable for recycling/
reuse
a
Varies from place to place/government standards/discharge point (http://law.epa.gov.tw/en/laws/
480770486.html)
LC 50 or the NOEL (no-observed-effect level) is expressed as the percent
effluent in the receiving water. Effluent having an LC 50 of 10% represents 10
TUs. The term toxic organics in wastewaters includes synthetic organic com-
pounds such as pesticides, herbicides, and chlorinated hydrocarbons. This
wastewater is generated where these chemicals are produced by the