Aerobic System Phase 2 (B+C) = Potential 95% Nitrogen Reduction
UASB Reactor – Phase 1: Anaerobic treatment
MBBR – Phase 2: Optional Aerobic treatment:
High quality water purification
Usage of algae as the oxygen source results in > 90% reduction in plant aeration energy (electrical) requirements
Dramatic reduction in TSS and BOD
Water treatment, oxygen production, and nitrogen assimilation into algae
No lagoon needed for treatment
High horespower blowers aren't relied on for aeration
High rate process (~20-40x faster than covered lagoon)
- Anaerobic phase can reduce GHG, treat water, and provide renewable energy, similar to other anaerobic technologies.
- Optional 2nd phase can provide an efficient higher level of water treatment. Plus, algae is separated out of water and can be used for bio-plastic, manufacture, fertilizer, cattle feed or other uses.
- Denitrification can be induced with second phase, reducing nitrogen in the waste water mixture, potentially to less than 10 ppm total nitrogen as desired
- The more area of algae raceways provided, the more N that can be harmlessly denitrified into N2 gas.
- The design of the system is flexible and modular, and can be designed to match needs for N management.
Environmental Impacts: Benefits to Water
- Reduction of N, when needed, to make room for N in well water or reduce land application area required;
- Facilitates water use in subsurface drip irrigation (SSDI):
- Water conservation by irrigation efficiency;
- Increased nutrient efficiency – protection of groundwater quality;
- Yield and quality increases – more crop per drop;
- Allows potential future treatment to remove salt, once the organics are out of the way.