Recycling Treated Municipal Wastewater for Industrial Water Use

Section 2
Implementation Considerations
Craddock Consulting Engineers 2-13
In Association with CDM & James Crook
TM1-Sec2_0707.doc
industrial applications for California and Florida are provided in Tables 2.5 and 2.6,
respectively.
Table 2.5. California Water Recycling Criteria (Industrial Uses)
Total Coliform
Type of Use
Limits
Cooling water where no mist created
Process water where no worker contact
Boiler feed
Mixing concrete
Cooling water where mist created 1
Process water where worker contact likely
≤ 23/100 ml
≤ 2.2/100 ml
1 Drift eliminator required; chlorine or other biocide required to treat cooling water to control
Legionella and other microorganisms.
2 Not required under certain conditions.
Source: Adapted from State of California [2000a].
Table 2.6. Florida Reuse Rule (Industrial Uses)
Wash water 1
Process water 1
Type of Use Total Coliform Limits
Once through cooling in closed
system
Once through cooling where mist
created (alternative requirements
acceptable if certain conditions
met)
≤ 200 fecal coli/100 ml
≤ 30 mg/L BOD
≤ 30 mg/L TSS
≤ 30 mg/L BOD
≤ 30 mg/L TSS
No detectable fecal
coli/100 ml
≤ 20 mg/L BOD
≤ 5 mg/L TSS
Treatment
Required
Secondary
Disinfection
Secondary
Coagulation 2
Filtration
Disinfection
Treatment
Required
Secondary
Disinfection
Secondary
Secondary
Filtration
Disinfection 2
1
Manufacture or processing of food or beverage where the water will be incorporated into or come in
contact with the product is prohibited.
2
Reclaimed water must be sampled at least once every two years for Giardia and Cryptosporidium.
Source: Adapted from Florida Department of Environmental Protection [1999].
Implications of No Water Reuse Guidelines or Regulations
Minnesota has not developed water reuse criteria and currently considers each water
reuse project on a case-by-case basis, using California’s Water Recycling Criteria as a
guideline for imposition of standards. Case-by-case determination of reclaimed water