ABSTRACT

Rice mill is one of the most important agro based industries in India and is highly responsible for creating significant impact on rural economy in particular and countries economy in general. Rice mill is playing an important role in the economic development of the Indian subcontinent, but the effluents released produce a high degree of organic pollution in both aquatic and terrestrial ecosystems. They also alter the physico-chemical characteristics of the receiving aquatic bodies and affect aquatic flora and fauna. In the present study, the physico-chemical characteristics of ADT-43 and BPT rice processing effluent were analyzed. The soaked rice mill effluent (RME) revealed an alkaline pH (7.5), salinity (2 ppt), DO (12 mg L?1), nitrate (0 ?mol/l), nitrite (32.5 ?mol/l), ammonia (93.6 ?mol/l), phosphate (58.6?mol/l), silicate (28.4 ?mol/l), calcium (20 mg L?1) and magnesium (1.1 mg L?1). The boiled rice mill effluent revealed an alkaline pH (7.06), salinity (2 ppt), DO (9.15 mg L?1), nitrate (17.98?mol/l), nitrite (2.7 ?mol/l) ammonia (9.18 ?mol/l), phosphate (2.38 ?mol/l), silicate (4.31 ?mol/l), calcium (12 mg L?1) and magnesium (2.24 mg L?1). The physico- chemical characteristics of ADT-43 and BPT soaked and boiled rice effluent was compared each other and also selection of promising microalgae species based on their growth for bioremediation studies and that effluent will be used as an alternative medium for the culture of microalgae. Keywords: Rice mill effluents, Physico-chemical properties, Microalgae, Nutrients, Bioremediation
Publication date: 01/01/2020

https://ijbpas.com/pdf/2020/January/MS_IJBPAS_2019_4925.pdf

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https://doi.org/10.31032/IJBPAS/2020/9.1.4925