G&O Bioreactors
STP Solupak
G&O Bioreactors offers two versions of our high-performance microbial additive for wastewater treatment: STP Solupak and STP Solupak HT. Both are designed to enhance the performance of Sewage Treatment Plants (STPs) and Marine Sanitation Devices (MSDs) on board ships and offshore installations — each tailored for specific operational needs.
Benefits of ST Solupak
Natural microbial formulation
A powerful blend of naturally occurring microbes breaks down organic matter efficiently, supporting high BOD reduction and compliance with the strictest environmental regulations.
Optimised for short Hydraulic Retention Times (HRT)
Ideal for compact marine systems. The active bioculture acts quickly and requires minimal maintenance.
Reduced residual sludge
Minimises sludge build-up, improving tank management and lowering disposal costs.
All-in-one solution
One product for start-up, maintenance, and shock dosing — no need for additional chemical products.
STP Solupak – Standard Version
For ongoing biological maintenance and daily operation
- Intended for routine dosing and maintenance of STPs and MSDs under normal operating conditions.
- Contains microbial strains resistant to chlorine (up to 20 ppm), making it robust in systems exposed to cleaning agents.
- Effectively controls odour, enhancing onboard comfort.
- Supplied in 10 kg buckets with 100 x 100 g water-soluble sachets.
Product Code: 80004-1
STP Solupak HT – High-Performance Version
For start-up, shock recovery, and critical operating conditions
- Specifically developed for start-up, shock dosing, and toxic shock recovery in biological treatment systems.
- Features a higher concentration of microbial activity for fast establishment of active biomass.
- Recommended in critical or variable operating conditions where fast biological recovery is required.
- Also provides odour control and reduced sludge.
- Supplied in the same format: 10 kg bucket with 100 x 100 g soluble sachets.
Product Code: 80005-1
Which version is right for your system?
| Function / Application | STP Solupak | STP Solupak HT |
|---|---|---|
| Routine maintenance | ✅ | ✅ |
| Start-up of STP/MSD | ⚠️ Limited | ✅ High efficiency |
| Toxic shock or system recovery | ⚠️ Not optimal | ✅ Designed for it |
| Rapid biomass establishment | ⚠️ Standard | ✅ Fast-acting |
| Chlorine resistance (up to 20 ppm) | ✅ | Not specified |
Sustainable treatment of grey and black water
Both versions of STP Solupak support IMO-compliant and environmentally friendly operations by enhancing biological treatment without relying on chemicals. G&O Bioreactors champions a natural approach that protects the marine environment, simplifies system operation, and reduces lifecycle costs.