Biotifx™ ULTRA Reduces Bio-Solids and Associated Costs in Municipal WWTP
A municipal wastewater treatment plant dosed with Biotifx™ ULTRA and saw a significant reduction in costs along with increased operational efficiency. This included a 50% reduction in bio-solids from sequencing batch reactors (SBR’s). Improvements in efficiency and cost included: reduction in odor control chemicals, belt press polymer, electricity, enzyme use, and sludge hauling. In just 3.5 months, the savings in sludge hauling alone was 2.5 times the cost of treatment. During the duration of the case study effluent water quality stayed comfortably within discharge limits.
The subject facility was located in Southern California with the majority of water flow coming from a nearby resort and casino. This plant included two operating SBR’s and had a total plant flow of 320,000 GPD. Historically, the plant was meeting their permit limits but experienced operational inefficiencies and concerns.
WWTP Concerns Included:
- Cost of sludge disposal (24 tons disposed every two weeks)
- Chemical costs
- Belt press polymer
- Odor control chemicals
- Electrical costs from aeration blowers and other equipment
- Periodic upsets that require use of enzyme product
The case study and treatment objective was to improve operational efficiency and lower associated costs.
MATERIALS AND METHODS
Biotifx™ ULTRA treatment started in early July of 2016 and is currently ongoing. Monitoring of results to determine success of this case study continued through October of 2016. The plant was dosed once a day with 1 water-soluble bag (0.5kg) of Biotifx™ ULTRA into each SBR. The total dose of 1kg/ day or 0.8ppm was based on the 320,000 GPD flow.
Figure 1. Tons of sludge being processed for hauling every two weeks before and during treatment with Biotifx™ ULTRA
Sludge yield dropped dramatically after treatment with Biotifx™ ULTRA (Figure 1.0). Prior to treatment, the plant processed 24 tons of sludge every two weeks. During the first nine weeks of treatment the plant did not run its belt press to process sludge and no sludge was disposed. After nine weeks, sludge processing and disposal resumed, but at a rate of 12 tons every two weeks; approximately half the sludge that was being processed and disposed of prior to dosing.
Operational Efficiency Improvements Included:
- 50% reduction in bio-solids
- Reduction of odor control chemical use by ~15 %
- Reduction of belt press polymer consumption by ~50%
- Extended blower down-time during aeration cycles by ~20%
- Reduced number of filamentous bacteria seen in microscope evaluations
- Reduced foaming in SBRs
- Eliminated need to dose enzymes for shock recovery