Use of a Wastewater After Anaerobic Pretreatment to Microalgae Platymonas Subcordiformis Growth

The use of a natural substrate for immobilization of microalgae cultivated in wastewater

“…The reduction rate of total nitrogen in comparison to raw sewage in reactor A was 81%. According to 7,10,16 , the efficiency of TN removal from wastewater by biofilm in algal cultivation varies in the range of 80-97%. In reactor B a lower removal efficiency of TN (64%) was obtained.…”

“…The available form of phosphorus for microalgae are phosphates (PO 4 3− ) 6,17 which are found in raw sewage and require removal. The microbial biofilm can reduce the concentration of Total Phosphorus (TP) by over 70% (even up to 97%) 7,10,16 . The concentration of TP is also influenced by the content of organic phosphorus, of which large amounts are also present in raw sewage.…”

“…optimal wastewater flow rate, appropriate light intensity and its effective use, as well as CO 2 supplementation. These factors affect the economic aspects of the construction and operation of technological systems for the cultivation of microalgae 16 . The material of a substrate for the immobilization of biomass has a great importance for the cultivation system and currently no universal substrate for this purpose exists 7 .…”

“…To reduce the costs of microalgae cultivation (for energy or biorefinery purposes), it is also possible to replace the synthetic cultivation medium with wastewater which is a rich source of nitrogen and phosphorus 9,15,16 .…”

“…Microalgae use inorganic nitrogen and phosphorus for growth [17][18][19] and due to their high resistance to pollution and the ability to easily adapt to environmental conditions they are able to proliferate in many types of wastewater 16 . Many researchers suggest using municipal, domestic, agricultural (containing nutrients from fertilizers 20 ) and industrial wastewater, effluents from landfills and biologically treated sewage for cultivation of microalgae 3,14,16,21 . The use of biofilm and sewage in algae cultivation contributes not only to a significant reduction of costs of biomass production, but also to the removal of nutrients, heavy metals, suspended solids, as well as toxic organic compounds 10,17,22 .…”