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Hydraulic characteristics of integrated settler based biofilm reactor as onsite sanitation system

  • Surya Pratap Singh , Meena Kumari Sharma EMAIL logo and Rakesh Chandra Gaur
Published/Copyright: August 18, 2021

Abstract

The present study identifies the hydraulic efficiency of a novel onsite sanitation system at variable hydraulic shock loading conditions. The system consisted of three chambers, each working as an up-flow anaerobic bioreactor, accommodated within a single unit. The hydraulic characteristics were identified with the help of residence time distribution (RTD) analysis by step feeding of lithium chloride (LiCl) solution into the system. The experiments were run at variable hydraulic loading conditions at different peak flow factors (PFF) of 1, 2, 4 and 6 while maintaining 24-h hydraulic retention time. As revealed in the RTD analysis, the biofilm reactor achieved a very good hydraulic efficiency that varied from 0.76 to 0.81 at PFF 1, 2 and 4. Although in the case of PFF6, it was comparatively low. It was noted that the dispersion number was always below 0.2 at variable hydraulic shock loading conditions under different PFFs, which indicated that the reactor behaved perfectly between mixed-flow and plug-flow reactor. The system was also able to achieve good pollutant removal efficiency for chemical oxygen demand (COD) and total suspended solids (TSS) under all PFFs, which was more than 68 and 75%, respectively.


Corresponding author: Meena Kumari Sharma, Department of Civil Engineering, Manipal University Jaipur, Jaipur, 303007, Rajasthan, India, E-mail:

Award Identifier / Grant number: F8(9) DST/SSD/2016/Part-1/3809

Acknowledgement

We are also grateful to the STP team (Aquacare Solution Enviro Engineers) of Manipal University Jaipur for their continuous support.

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: This research project is financially sanctioned by the Department of Science and Technology, Government of Rajasthan, India, through Project file no. F8(9) DST/SSD/2016/Part-1/3809.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Supplementary Material

The online version of this article offers supplementary material (https://doi.org/10.1515/ijcre-2021-0112).


Received: 2021-05-02
Accepted: 2021-08-01
Published Online: 2021-08-18

© 2021 Walter de Gruyter GmbH, Berlin/Boston

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