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ETV REPORT AND VERIFICATION STATEMENT - KASELCO POSI-FLO ELECTROCOAGULATION TREATMENT SYSTEM
Concurrent Technologies Corporation (CTC). ETV REPORT AND VERIFICATION STATEMENT - KASELCO POSI-FLO ELECTROCOAGULATION TREATMENT SYSTEM. 2001.
The Kaselco Electrocoagulation Treatment System (Kaselco system) in combination with an ion exchange polishing system was tested, under actual production conditions, processing metal finishing wastewater at Gull Industries in Houston, Texas. The verification test evaluated the ability of the combined treatment system to remove regulated contaminants from the wastewater and recover the wastewater for reuse. Testing was performed during treatment of three batches of wastewater, with each batch approximately equaling the average volume of wastewater generated daily at Gull Industries. Samples were collected of the raw wastewater, intermediate streams, final treated wastewater, and process residuals, including sludge. Chemical usage, electricity usage, and labor data were collected to perform the cost analysis. The results from each set of analytical data were compared to the applicable metal finishing (40 CFR 433) and proposed MP&M limitations (66 FR 423) to determine if the Kaselco and ion exchange systems achieved these standards. For the Kaselco system, the metal finishing limitations were met for all parameters for each batch of wastewater treated. The Kaselco system also met the proposed MP&M limitations for all parameters with the exception of manganese during treatment of batch 1. The proposed MP&M limit for manganese is 0.25 mg/L; and the Kaselco clarifier discharge for batch 1 contained 0.509 mg/L Mn. The following parameters were considered in the cost analysis: chemical reagents, steel plates, other materials (e.g., filters), electricity, labor, and sludge management. The cost of treatment for the Kaselco system, excluding labor, was $6.06/1,000 L ($22.91/1,000 gal.) and $18.18/1,000 L ($66.85/1,000 gal.), including labor. Labor costs were affected by design of the system tested. The installed system at Gull Industries is a batch system. Kaselco also manufactures automatic, continuous flow systems that would be less labor intensive. The cost of treatment for the ion exchange system, excluding labor, was $2.77/1,000 L ($10.47/1,000 gal.) and $3.91/1,000 L ($14.79/1,000 gal.), including labor.