SND Biological Water Treatment Solutions
WaterDoctor's proprietary SND microbial cultures, which WaterDoctor says remove ammonia, nitrite and nitrate together in a single aerobic process.
Key specifications
FSND — Freshwater
- Environment
- Freshwater (WaterDoctor’s gallery caption: “Freshwater SND microbial consortia”)
- Key capability
- WaterDoctor’s claim: simultaneous NH₄⁺, NO₂⁻ and NO₃⁻ removal in one aerobic process
- Mechanism
- Direct Ammonia Oxidation (DIRAMMOX) + aerobic denitrification
MSND — Marine
- Environment
- Saltwater (WaterDoctor’s gallery caption: “Saltwater SND microbial consortia”)
- Key capability
- WaterDoctor’s claim: simultaneous NH₄⁺, NO₂⁻ and NO₃⁻ removal in one aerobic process
- Mechanism
- Simultaneous nitrification-denitrification (WaterDoctor’s mechanism claim)
Simultaneous Nitrification-Denitrification (SND)
WaterDoctor’s SND Biological Water Treatment Solutions are proprietary microbial cultures which WaterDoctor says remove ammonia, nitrite and nitrate together in a single aerobic process, through direct ammonia oxidation and aerobic denitrification. Its headline figure is an 80%+ nitrogen removal rate; the brochure scopes it to some RAS projects and no document read states the basis. The catalogue lists freshwater (FSND) and saltwater (MSND) variants; no species or salinity limits are stated here.
FSND — Freshwater
- External carbon
- WaterDoctor says the culture reduces external carbon demand (brochure p9, translated); the requirement is not stated
MSND — Marine
- Salinity and water quality
- WaterDoctor’s brochure (p9, translated) says stable operation across a wide range of salinity and water quality; no range is stated
Product forms
- SND CoreLiquid
- Conical tubes (WaterDoctor’s printed name, brochure p14); tube volume not stated in the documents read
- SND XLiquid
- 25 L can (WaterDoctor’s printed name, brochure p14)
- SND DryCore
- 1 kg freeze-dried powder pouch (WaterDoctor’s printed name and net content, brochure p14)
Best for
Key product advantages
- WaterDoctor’s claim: removes NH₄⁺, NO₂⁻ and NO₃⁻ in a single aerobic process
- Headline 80%+ nitrogen removal rate (WaterDoctor’s claim; its brochure scopes it to some RAS projects; basis not stated)
- WaterDoctor says the culture reduces external carbon demand; marine variant described as stable across a wide range of salinity and water quality, no range stated
- WaterDoctor describes itself as an NUS-linked company and states R&D began in 2015; its own timeline dates the SND bacteria discovery to 2021
- WaterDoctor says its SND biological treatment system can be retrofitted to existing ponds and RAS (a statement about the system, not the culture alone)
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