Just dropping you a letter on how the CCSW Oakwood facility is performing since the use of Eco-tab products last year.
We started the program on May 21, 2010. Initially I was skeptical on how this product was going to work. I had used bacterial based products in the past to little result. Then, ironically we ran into a high flow period during the seeding process of Eco-tabs, but eventually the program fell into place. I did come to realize that it takes at least a month of running the program until significant results were observed. During this initial seeding and dosage adjustment period, the representatives from Eco-tabs were very helpful in operational changes that took place at our facility.
They have quite a team of experts from various fields, including wastewater operations. Overall, we are impressed with what Eco-tabs has done at the plant.
You had asked about sludge and odor. The most noticeable results of Eco-tabs occurred in the second month of treatment. By June the tons of sludge we normally disposed of started to reduce, and overall costs to offload sludge began to slowly decline. We also noticed an almost immediate reduction in the stench that came from our dated ponds. We were (and are) very happy about that.
Our treatment plant is unique in the sense that we have a very limited amount of sludge storage space. We have to shut air off on both digesters and decant them daily. This daily process is requiring less time since the use of Eco-tabs. Also we are able to hold a higher percentage of solids in the digesters without compromising settle-ability.
Overall, the use of Eco-tabs has lessened the sludge disposal costs to the point where it is not costing us any money to run the program with the Eco-tab products, and we still have some money to spare.
But for us, the real results came from the data from testing of the BOD5. We gathered samples reflecting a reduction from 833.3 mg/l influent to 52.5 mg/L system effluent (a 93.7% total system reduction in BOD5)! Prior to this, we had rarely shown results below 400 mg/l effluent.
If I can be of any assistance, you can always call me.
John F. Ferrara, M.S., OIT2
Plant Operator / Oakwood
(954) 369-5574 Ext. 2