BIOTIM® Anaerobic Tower
High-rate anaerobic treatment with compact footprint
Other technologies in our BIOTIM® Anaerobic wastewater treatment systems family

Vertical reactor, high biogas yield and small footprint
The BIOTIM® Anaerobic Tower is a high-rate vertical reactor packed with biofilm-supporting media. Wastewater is pumped upward through the tower, enhancing digestion and biogas recovery in a compact footprint.
Key advantages of the BIOTIM® Anaerobic Tower
- Space Efficiency: The tall vertical design drastically cuts footprint requirements (up to 50% land savings versus conventional reactors), making it ideal for plants with limited space or for retrofits where expansion area is tight.
- Reduced Carbon Emissions: By capturing methane that would otherwise be lost (and using it as energy), the anaerobic tower helps cut greenhouse emissions. It also eliminates or reduces the need for energy-intensive aeration, thereby lowering the overall CO₂ footprint of treatment.
- Cost-Effective Operations: Generating on-site biogas energy and requiring a smaller infrastructure footprint both contribute to lower lifecycle costs. Many users find that the tower solution not only pays for itself through energy savings but also avoids expensive land acquisition or civil works.
- Proven Performance: Waterleau’s anaerobic towers have a growing track record in industry, with successful deployments in food & beverage sectors. These references demonstrate that the technology reliably meets effluent standards and gas production targets, giving new adopters confidence in its performance.

Biogas pre-treatment with the BIOTIM® scrubber
A key component in maximizing the biogas utility from the BIOTIM® UASB process is the BIOTIM® Scrubber. This cutting-edge solution for biogas desulfurization efficiently extracts hydrogen sulfide (H2S) and other sulfur compounds from biogas, safeguarding cogeneration equipment from corrosion and ensuring the biogas meets energy use standards.
Incorporating the BIOTIM® Scrubber elevates the sustainability and economic value of the generated biogas, positioning it as a cleaner, more adaptable fuel alternative.
Start recovering biogas from wastewater
For more information on how BIOTIM® UASB technology can transform your wastewater management practices, enhance your energy recovery efforts, and contribute to a greener planet, contact Waterleau today. Together, we can embark on a journey towards a more sustainable and environmentally responsible future.
Our BIOTIM® UASB technology cases

Sustainable Brewing in Colombia: How Waterleau's BIOTIM® UASB Transforms Central Cervecera
The CCC Brewery treats different wastewater & waste streams before safe discharge to the open water bodies.

Sustainable sugar refining near Paris, France
BIOTIM® reactors for biogas production from other types of wastewater
- BIOTIM® UASB : The Waterleau reference anaerobic solution for medium-strength wastewater
- BIOTIM® UAC : biogas production from more difficult wastewater
- BIOTIM® CSTR : biogas production from vicious, solid-laden waste streams
- BIOTIM®An MBR : biogas production and quality water in one
- BIOTIM® Solids : biogas production from municipal sludge
Start recovering biogas from concentrated wastestreams
For more information on how BIOTIM® CSTR technology can transform your wastewater management practices, enhance your energy recovery efforts, and contribute to a greener planet, contact Waterleau today. Together, we can embark on a journey towards a more sustainable and environmentally responsible future.
Frequently asked questions on BIOTIM® UASB Technology
How does BIOTIM® UASB technology contribute to sustainability?
BIOTIM® UASB technology contributes to sustainability through its efficient wastewater treatment process that not only purifies water but also generates renewable energy in the form of biogas. This approach significantly reduces the CO2 footprint by minimizing the need for energy-intensive aeration processes typical of aerobic systems. By converting organic waste into biogas, a clean energy source, it supports the transition from fossil fuels to renewable energy, aligning with global sustainability goals and promoting a circular economy in the food & beverage industry.
Can BIOTIM® UASB handle high-strength wastewater from all food & beverage sectors?
Yes, BIOTIM® UASB is specifically designed to manage high-strength wastewater characteristic of various sub-sectors within the food & beverage industry, including breweries, dairies, and potato processing plants. Its effectiveness lies in the technology's ability to treat bio-rich effluent, efficiently breaking down organic pollutants into biogas, thus making it suitable for a wide range of applications within the industry.
What makes BIOTIM® Scrubber essential in the BIOTIM® UASB process?
The BIOTIM® Scrubber plays a crucial role in the BIOTIM® UASB process by enhancing the quality of the biogas produced. It does so through the desulfurization process, removing hydrogen sulfide (H2S) and other sulfur compounds from biogas. This step is essential for preventing corrosion in cogeneration equipment and ensuring the biogas meets quality standards for energy use. The scrubber effectively increases the economic value of the biogas, making it a cleaner and more versatile fuel option.
How does the energy recovery aspect of BIOTIM® UASB work?
The energy recovery aspect of BIOTIM® UASB works by transforming the organic pollutants in wastewater into biogas, a renewable energy source. This process occurs in the anaerobic treatment where dense anaerobic bacteria digest organic matter within the wastewater, producing biogas. This biogas can then be captured and used to generate electricity or heat, reducing energy costs and dependence on non-renewable energy sources, thus contributing to the sustainability goals of the food & beverage industry. Working mechanism/
1. Influent Distribution (Bottom)
- Wastewater enters the reactor at the bottom.
- A special distribution system ensures even and upward flow through the sludge blanket.
2. Sludge Blanket Zone (Middle)
- The reactor contains a dense sludge bed formed by granular anaerobic biomass.
- As wastewater flows upward, anaerobic microorganisms digest organic matter (Chemical Oxygen Demand or COD).
- The biological process produces methane (CH₄) and CO₂, forming biogas.
3. Three-Phase Separator (Top)
- Located at the top of the reactor, the 3-phase separator plays a key role:
- Biogas is captured and collected (often sent to energy recovery systems).
- Treated effluent exits the reactor from the top.
- Biomass settles back into the sludge blanket, ensuring high biomass retention.
4. Biogas Pretreatment and Biogas Use
- Biogas is stored or used to generate heat and/or electricity via CHP (combined heat and power).
- This reduces the facility’s energy bill and carbon footprint.
- The biogas needs desulfurisation with a BIOTIM® scrubber prior use
What are the cost benefits of switching to BIOTIM® UASB technology?
Switching to BIOTIM® UASB technology offers several cost benefits, including reduced energy consumption, lower operational and maintenance costs compared to aerobic treatment systems, and the generation of biogas, which can be used as a renewable energy source to power facilities. These factors contribute to significant savings over time, making BIOTIM® UASB an economically viable option for businesses seeking to improve their wastewater management systems while also reducing their environmental impact.
How can businesses start implementing BIOTIM® UASB technology?
Businesses interested in implementing BIOTIM® UASB technology should begin by conducting a thorough assessment of their current wastewater treatment systems and sustainability goals. Contacting a specialist like Waterleau, the provider of BIOTIM® UASB technology, is a crucial next step. Waterleau can offer expert guidance on the integration process, tailored to meet the specific needs and capacities of the business. This may include feasibility studies, design and engineering services, installation, and operational support to ensure a smooth transition to a more sustainable and efficient wastewater treatment solution.
What are the disadvantages of a BIOTIM® UASB?
Long Start-Up Time: Establishing a stable microbial community can take several weeks.
Temperature Sensitivity: Performance drops significantly in colder climates without additional heating.
Effluent Quality: May require post-treatment to meet discharge standards.
Nutrient Requirements: Requires proper nutrient balance to maintain microbial health.
Potential for Odors: Anaerobic processes can produce unpleasant odors if not properly managed.
How to maintain a BIOTIM® UASB reactor?
Monitoring: Regularly monitor pH, temperature, and organic loading rates to ensure optimal conditions. Check biogas production rates and composition to assess reactor performance.
Nutrient Balance: Ensure a balanced supply of nutrients (e.g., nitrogen, phosphorus) to support microbial health. Supplement nutrients if necessary based on wastewater characteristics.
Temperature Control: Maintain an appropriate temperature range (typically 25-35°C) for efficient anaerobic digestion. Use heating systems if operating in colder climates to sustain microbial activity.
Influent Quality: Pre-treat influent to remove large particles and toxic substances that could harm the anaerobic microorganisms. Maintain consistent flow rates to avoid hydraulic shocks to the system.
Gas Management: Ensure proper collection and handling of biogas to prevent pressure build-up and potential safety hazards. Regularly inspect and maintain gas collection and flaring systems.
System Inspections: Conduct routine inspections of mechanical components, such as pumps, valves, and mixers. Check for leaks, corrosion, and wear, and perform timely repairs to prevent system failures.
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