[Robert ReinhardtModerator]

Even though the weather conditions (especially temperature and light period) vary considerably, algal ponds technology can be utilized in the different geographical locations. Each location has certain advantages and disadvantages. While the light performance in southern locations is relatively high throughout the year, northern latitudes have much better light performance in the summer time. In the southern areas, high temperatures may be problematic because of the evaporation and we might be out of the optimal conditions for significant part of the day. In the northern latitudes, there is a potential problem of freezing in the winter months, so the ponds have to be occasionally heated if the temperature drops considerably for a longer time period.

So, we might expect that the algal-bacterial treatment in northern latitudes will outperform the same technology in south for approximately half of the year. For the rest of the year, it might be required to revert to a classical processing.

Much depends also on the selection of algal species. To fine tune the plant, especially in colder latitudes, some preliminary testing on site is important for the final optimisation of treatment installation.

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