Published: 2022-12-16

DOI: 10.56557/upjoz/2022/v43i233260

Page: 66-78


Department of Zoology, Sri Vidya Mandir Arts and Science College, Uthangarai (TK), Tamil Nadu, India.


PG & Research Department of Zoology, Nehru Memorial College (Autonomous), Puthanampatti-621 007, Tiruchirappali, Tamil Nadu, India.


Department of Zoology, Vivekanandha College of Arts and Science for Women, Tiruchengkodu, Tamil Nadu, India.


PG & Research Department of Zoology, Nehru Memorial College (Autonomous), Puthanampatti-621 007, Tiruchirappali, Tamil Nadu, India.

*Author to whom correspondence should be addressed.


Spirulina is multi cellular, autotrophic and filamentous blue-green microalgae possessed rich protein, vitamins, minerals and pigments. It showed various pharmaceutical activities including anticancer and anti HIV activities. It also used as animal feed for rich protein content. Black water refers to toilet water which turned and one of the most significant sources of human pathogens and source of ground water pollution. In the present study focused to treat the wastewater through the cultivation of S. platensis. Culturemedium was divided into three groups (Group I (100% black water), Group II (50% black water), Group III (25% black water) and Group IV (Chemical medium). Water quality parameters were measure before and after cultivation of spirulina. A healthy and high amount of S. platensis was cultured in group III (25% black water) more or less similar to the chemical medium. The cost effect ratio for the synthetic medium showed the high expenses. On the other hand, in wastewater culture spirulina showed a maximum gain from zero cost management or without loss of cost. With regard to waste water treatment, the culturing of spirulina favorably altered the physical and chemical parameters of the wastewater except chlorides, total hardness and total alkalinity.The present study indicates that spirulina canbe successfully cultured in black wastewater with expected yield. Furthermore the cultured water can also be used for irrigation purpose with 25% addition of freshwater or as such. Since there is no bad odour and other toxic material it can also be used for toilet flush.

Keywords: Wastewater, spirulina, physicochemical parameters

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