Post-treatment of upflow multi-layer granular media beds column in septic tank system

Authors

  • Sopida Khamyai Environmental Engineering and Management, Asian Institute of Technology
  • Tatchai Pussayanavin Faculty of Science and Technology, Ramkhamhaeng University
  • Thammarat Koottatep Environmental Engineering and Management, Asian Institute of Technology
  • Tinnapat Mongkontep Environmental Engineering and Management, Asian Institute of Technology
  • Le My Dinh Environmental Engineering and Management, Asian Institute of Technology
  • Chongrak Polprasert Department of Civil Engineering, Faculty of Engineering, Thammasat University

Keywords:

Septic tank, upflow multi-layer granular media beds, post treatment

Abstract

Septic tanks are used to collect black water as an on-site treatment system. However, effluent of septic tank is still high concentration of pollutants. There are several post treatment processes to remove those pollutants such as media filtration, membrane filtration and electrochemical process. Therefore, upflow muti-layer granular media beds were applied as post treatment of septic tank effluent. The muti-layer granular media beds comprise of alum sludge and granular activated carbon (GAC). Alum sludge media contained high concentrations of iron and aluminum could provide oxidative damage to the pathogens. GAC bed could remove organic compound and adsorb nutrients. Development for kinetic model of muti-media layers was found that the k20 values for BOD removal efficiencies was 4.23 day-1 with the R2 value of more than 0.75. Nevertheless, the kinetic value with actual scale data should be validated.

References

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Published

2022-08-31

Issue

Vol. 5 No. 2 (2022): May-August

Section

Short Communications

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