Treatment in stabilization reservoirs

This is one of the simplest methods. The term stabilization resevoir denotes all modifications of wastewater treatment in shallow ground-reservoirs in which both aerobic and anaerobic processes take place. The reservoirs can be either through-flow or accumulation ones [1, 3, 4]. 

Sometimes, biological treatment is combined with fish breeding, or original ponds are used for the treatment. It is important to keep the oxygen concentration higher than 3 mg 1 and therefore wastewater must be adequately diluted and must not contain toxic substances. The water for dilution should not contain high quantities of humic acids and iron. In these ponds carp and sloths Uve, but their meat has rather unpleasant flavour and therefore they must be kept in clean water for a certain period of time before being consumed. 

Stabilization reservoirs are a set of mutually connected reservoirs in which the process of treatment takes place gradually from the anaerobic stage in the first reservoir to the aerobic stage, for example involving fish breeding, in the last reservoir [1, 3, 5, 6]. 

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