Our classic design is a multi-chambered underground bioreactor arrangement. This method of construction ensures that the treatment plant is almost completely hidden from view. The HWT bioreactor has been used extensively at wineries and ENGEN One Stops. Treated effluent is compliant with the DWS General Limit and this has been achieved via the Hydrossis Process
Underground Wastewater Treatment Bioreactor Systems
At HWT, advanced Underground Wastewater Treatment Bioreactor systems are designed and supplied for residential, commercial, industrial, and municipal wastewater treatment applications. These compact biological treatment systems are specifically engineered for installations where space limitations, aesthetics, environmental sensitivity, or low visual impact are important project requirements.
Consequently, underground bioreactor systems are increasingly being selected for estates, hotels, lodges, apartment developments, schools, and environmentally sensitive sites. In addition, valuable surface space can be preserved because much of the treatment infrastructure is installed below ground level.
Underground Wastewater Treatment Bioreactor Technology
Underground bioreactors are designed to biologically treat sewage and wastewater through controlled aeration and microbial activity. During the treatment process, organic pollutants and ammonia are broken down by naturally occurring bacteria under carefully controlled operating conditions.
As a result, high levels of COD, BOD, suspended solids, and nutrient reduction can be achieved within a compact footprint. Furthermore, odour generation and noise levels can often be reduced due to the enclosed underground configuration.
The following process components are commonly incorporated:
- Underground aeration chambers
- Biological treatment reactors
- Fine bubble diffuser systems
- Sludge recycle systems
- Clarification zones
- Automated blower and oxygen control systems
- Access chambers for maintenance and inspection
Therefore, reliable wastewater treatment performance can be maintained while minimising the visible impact of the treatment plant.
Ideal for Space-Constrained and Sensitive Sites
Underground wastewater treatment bioreactors are widely utilised where conventional above-ground plants may not be suitable. Consequently, these systems are commonly applied in:
- Residential estates
- Apartment complexes
- Boutique hotels and lodges
- Schools and campuses
- Commercial developments
- Wine farms and agricultural facilities
- Eco-sensitive developments
- Remote installations
Moreover, landscaped areas, parking facilities, or public spaces can often be developed above portions of the underground treatment infrastructure, thereby improving overall site utilisation.
Low Visual Impact and Reduced Odour
One of the primary advantages of underground bioreactor systems is the reduced visual impact that can be achieved. Since much of the treatment process is installed below ground level, the surrounding environment can be preserved more effectively.
Additionally, treatment units can be enclosed and ventilated in a controlled manner. Consequently, odour management can be improved when compared to certain conventional open treatment systems.
Furthermore, noise levels from blowers and mechanical equipment can be reduced through underground installation and acoustic enclosure design.
Designed for Automated and Reliable Operation
Modern underground bioreactor systems are designed with automated controls and monitoring systems to simplify operation and improve reliability. Therefore, dissolved oxygen levels, blower performance, sludge recycle rates, and alarm conditions can be continuously monitored and adjusted automatically.
Remote monitoring systems can also be incorporated to improve operational oversight and maintenance response times.
Since 1994, HWT Water Treatment has designed and supplied practical wastewater treatment solutions throughout Southern Africa. Consequently, underground wastewater treatment bioreactors can be engineered to suit both small and large-scale sewage treatment applications while maintaining efficient biological treatment performance and low environmental impact.