## Ion Exchange Wastewater Treatment Technology

Ion Exchange Wastewater Treatment Technology was developed in the water industry where Cations and Anions are exchanged in water are exchanged with H and OH ions of the medium (resin) to produce ion free water. The application of Ion Exchange in wastewater treatment has been proven to be effective and currently numbers of facilities are using Ion Exchange System to treat and recycle their rinse water from their processes.

Among wastewater treatment, recycling and recovery technologies, our unique design for Ion Exchange Systems is the only technology that can yield close to 98% recovery of the rinses. Other technologies, such as RO or standard Ion Exchange Systems can recover a maximum of 85% to 90% and produces 10% to 15% reject on a continuous basis in the RO case that would require separate treatment.

Ion Exchange Technology also produces waste in the form of regeneration once the resin capacity is exhausted. However, our unique design minimizes the volume of the regeneration waste to approximately 2% of the total flow. Depending upon design capacity, this regeneration can take place once a day or once a week, which allows the operators to batch treat the regeneration waste accordingly. In the case of “Zero Discharge”, the regeneration waste is evaporated, and solids are hauled off-site for reclamation of metals. To achieve a Sludge-less process, electro-winning combined with the Nanofiltration system is employed.

SRI builds Ion Exchange Systems for Printed Circuit Boards, Plating, and Semiconductor industries, where water quality is important. Our standard sizes are designed for 10, 30, 50, 75, 100, and 200 gallons per minute.

Call us for obtaining a quotation on our Ion Exchange Systems.

## Waste Water Neutralization Calculations_U S

##### Calculations

gmp

WW Flow Rate, Qww =

gal/day

Moles/L of OH needed =

moles/L

Incoming pH, pHin =

NaOH rate needed =

moles/day

Desired pH, pHout =

Caustic solution rate =

lb/day

Caustic sol’n % NaOH =

Caustic solution rate =

gal/day

Caustic sol’n density, ρ =

lb/gal

Daily cost of caustic =

\$/day

Caustic solution cost =

\$/lb

##### Inputs

gmp

WW Flow Rate, Qww =

gal/day

Incoming pH, pHin =

Desired pH, pHout =

Caustic sol’n % NaOH =

Caustic sol’n density, ρ =

lb/gal

Caustic solution cost =

\$/lb

##### Calculations

Moles/L of OH needed =

moles/L

NaOH rate needed =

moles/day

Caustic solution rate =

lb/day

Caustic solution rate =

gal/day

Daily cost of caustic =

\$/day

##### Calculations

gmp

WW Flow Rate, Qww =

gal/day

Moles/L of H+ needed =

moles/L

Incoming pH, pHin =

H2SO4 rate needed =

moles/day

Desired pH, pHout =

Acid solution rate =

lb/day

Acid sol’n % H2SO4 =

Acid solution rate =

gal/day

Acid sol’n density, ρ =

lb/gal

Daily cost of acid =

\$/day

Acid solution cost =

\$/lb

##### Inputs

gmp

WW Flow Rate, Qww =

gal/day

Incoming pH, pHin =

Desired pH, pHout =

Acid sol’n % H2SO4 =

Acid sol’n density, ρ =

lb/gal

Acid solution cost =

\$/lb

##### Calculations

Moles/L of H+ needed =

moles/L

H2SO4 rate needed =

moles/day

Acid solution rate =

lb/day

Acid solution rate =

gal/day

Daily cost of acid =

\$/day