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PILOT STUDY SUMMARY

This pilot study was recently conducted at the Santa Rosa facility of American Linen Service Company, to determine the feasibility of treating their whole wastewater stream. All of the treated water would need to be of such a quality to permit reuse, for wash and bleaching cycles. Follows is a compilation of the data recorded during and to the trials ending.

The conditions set for the introduction of raw feed to the scaled pilot system were discussed and implemented to begin treating. High temperatures, high pH, and high soap levels will tax any treatment system. Our only criteria set for effective treatment was a raw feed temperature below 100F. Feed water from the cooling (EQ) tank had cooled to an average temperature ranging from 70F to 95F. The running pH high of 10 was never lower than 9 throughout the course of the trial, and treated filtrates consistently finished half a point less than the daily average.

BOD and TDS levels were affected together and yet separately by treatment. High soap and pH levels typically meant high TDS readings, and in one case, TDS remained high even after treatment. In general the treatment continued with no mentionable variations in performance. When lab testing began, the treated filtrate was sent through particulate and carbon polish filters with different micron levels to assimilate real time operational requirements for reusable water.

Day: 9/4/09 Before After
BOD 680 96
TDS 1200 1100
TSS 210 8
Oil & Grease 230 <5.0
pH 10 9
Treated filtrate passed through 5 and 1 micron carbon
Day: 9/9/09 Before After
BOD 1100 150
TDS 4300 4100
TSS 320 26
Oil & Grease 390 21
pH 10 9.8
Treated filtrate passed through 2) 5micron carbon
Day: 9/11/09 Before After
BOD 680 96
TDS 1200 1100
TSS 210 8
Oil & Grease 230 <5.0
pH 10 9
Treated filtrate passed through 10 micron particulate

Dosage rates can be adjusted throughout a day’s treatment when or if needed to achieve desired water quality. This study revealed that REACTIVATE® dispensed at an average rate of 1/3 pound per 100 gallons, and provided highly treated filtrate at a an average pH of 9.5 with reduced TDS and very good clarity.

Solids testing of the cake generated can be submitted to the Profile department for any landfill, for review and acceptance. If accepted, the solids may be mixed with regular daily rubbish and hauled as such. Another common use for Non-Hazardous Solids is for TDC (Top Daily Cover) at most landfills.