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Two-Stage Passive High-Throughput Sustainable Sewage Treatment Process: Laboratory Study and Future Scope

Sukhani, S and Chanakya, H (2020) Two-Stage Passive High-Throughput Sustainable Sewage Treatment Process: Laboratory Study and Future Scope. [Book Chapter]

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Official URL: https://doi.org/10.1007/978-981-15-0706-9_15


Large volumes of sewage need to be handled in the emerging SDG 6 scenario, and low energy/maintenance options are required for distributed and unattended situations. In this direction, a novel two-stage system was developed consisting of a primary anaerobic digestion followed by protozoan/phytoflagellate bacteria/residual OM (organic material) removal stage. Anaerobic purification by sludge upwelling found naturally in idle lagoons was firstly emulated and hastened by encouraging deeper sludge beds that upwell, disperse sludge and maintain high MLVSS without need for mechanical sludge recirculation. In the second stage, a Euglena-driven system that removes mixotrophically, bacteria and residual solids provide reasonably acceptable treated water quality at a HRT < 2d. In this paper, we discuss the preliminary findings. Overall reduction of 70-80 COD, 55 TKN, 25 P and >90 turbidity was achieved. While optimization and in-depth understanding of functionality are being investigated, this system appears to be a good alternative to conventional treatment technologies where space constraints are less and distributed treatment with low interventions is required. © Springer Nature Singapore Pte Ltd. 2020.

Item Type: Book Chapter
Publication: Recent Trends in Waste Water Treatment and Water Resource Management
Publisher: Springer Singapore
Additional Information: The copyright for this article belongs to Springer Singapore.
Keywords: Anaerobic treatment; Passive natural process; Protozoa and phytoflagellates; Wastewater treatment
Department/Centre: Division of Mechanical Sciences > Centre for Sustainable Technologies (formerly ASTRA)
Date Deposited: 06 May 2023 03:14
Last Modified: 06 May 2023 03:14
URI: https://eprints.iisc.ac.in/id/eprint/81403

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