Anaerobic treatment of wastewater
Several technologies exist for anaerobic treatment of wastewater. So far, the leading technologies in Thailand that are most suitable for local conditions in terms of efficiency and performance have been:
- Anaerobic Baffle Reactors (“ABR”)
- Plug Flow Reactors (“PFR”)
- Upflow Anaerobic Sludge Blanket (“UASB”)
In 2018, we introduced to the market the Hybrid Covered Lagoon Reactor (“HCLR”). This technology combines the best attributes of the top two technologies in one reactor resulting in improved :
- flexibility in operations,
- better methane yield, and
- improved wastewater treatment efficiency.
Another key competitive advantage of the HCLR is its capability of digesting biomass, such as wet cake, and napier grass, in addition to wastewater. By combining feedstocks, great economies-of-scale scale are reached as both OPEX and CAPEX per output are significantly decreased. The graph below is based on actual project references and illustrates how the economies-of-scale of the HCLR greatly improves EBITDA/CAPEX ratios of biogas projects:
These economies-of-scale facilitate better project feasibility. Combining two ABR/PFR projects that are too small to be feasible, creates a HCLR project with good feasibility. The innovation has a clear development impact as the HCLR improves market potential by increasing the number of feasible projects.