Biological Treatment of Hospital Wastewater by using Batch and Rotating Biological Contractors

  • Krishna Prasad M., Jyothi K., Swetha Sri V., Nagaraju G.

Abstract

The wastewater generated from the hospital consists of pharmaceuticals, pathogenic bacteria, drugs, suspended particles and bloodstains that may  influence the ecosystem possibly causes cancers that have been observed for decades. To overcome these, impacts, the wastewater is started to treat before discharged to the water bodies.  The treatment process has evolved into various physical, chemical and biological methods. Biological treatment methods are conducted in this paper to study the comparative analysis for the BOD and COD removal efficiencies in the batch study and RBC model. A pilot scale of a biofilm model of Rotatory Biological Contactor (RBC) was implemented as the extension of batch experiments. The prepared synthetic hospital wastewater with high concentrations are treated using the bacteria Pseudomonas aeruginosa and Vibrio cholera as a treatment media. The substrate removal rate was analyzed by conducting the BOD and COD experiments in the batch study. The Pseudomonas aeruginosa results indicated 78% BOD removal efficiency from the batch study. This bacteria was used in the treatment of influent by using an attached biofilm model RBC of 6 liters capacity with 4 discs, each having surface area 0.4m2 and 45% submergence. Compared with batch experiments, RBC has greatly removes the 67% of COD and 85% of BOD. This work also illuminates the importance of Pseudomonas aeruginosa bacteria for the effective elimination proficiency of a substrate in the cure of pharmaceutical discharge. The treated effluent will be reused for decreasing the increasing demand for water. In the present study the biofilms have maximum of dry matter and are at ease to dehydrate and settle in contrast to activated sludge. RBC can significantly diminish the treatment price, related to commercial incineration processes or advanced oxidation processes,. This work  proves RBC is operative for an innately bio obstinate wastewater even at lesser ambient temperature.

Published
2020-06-01
How to Cite
Krishna Prasad M., Jyothi K., Swetha Sri V., Nagaraju G. (2020). Biological Treatment of Hospital Wastewater by using Batch and Rotating Biological Contractors. International Journal of Advanced Science and Technology, 29(8s), 4774 - 4786. Retrieved from http://sersc.org/journals/index.php/IJAST/article/view/27354