A research on the performance of down-flow hanging sponge (DHS) reactor treating domestic wastewater

Nguyen Trung Hiep, Le Thi Hong Tuyet , Dinh Thi Nga, Phan Dinh Tuan
Author affiliations

Authors

  • Nguyen Trung Hiep Faculty of Environment and Natural Resources, Nong Lam University – Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Viet Nam
  • Le Thi Hong Tuyet Research Institute for Sustainable Development, Hochiminh City University of Natural Resources and Environment, 236B Le Van Sy, Ward 1, Tan Binh District, Ho Chi Minh City, Viet Nam
  • Dinh Thi Nga Research Institute for Sustainable Development, Hochiminh City University of Natural Resources and Environment, 236B Le Van Sy, Ward 1, Tan Binh District, Ho Chi Minh City, Viet Nam
  • Phan Dinh Tuan Research Institute for Sustainable Development, Hochiminh City University of Natural Resources and Environment, 236B Le Van Sy, Ward 1, Tan Binh District, Ho Chi Minh City, Viet Nam

DOI:

https://doi.org/10.15625/2525-2518/56/4/10878

Keywords:

Down-flow Hanging Sponge (DHS) system, domestic wastewater, organic loading rate, removal efficiency

Abstract

The aim of this study was to evaluate the performance of a down-flow hanging sponge (DHS) system in treating domestic wastewater. A pilot-scale of DHS system with a capacity of 60 L was designed and fabricated from polyvinyl chloride (PVC). The dimensions of DHS system are 1.5 m in height and square surface with 0.2 m in width, consists of three identical segments connected vertically in series. Each segment was filled by polyurethane sphere containing sponge. The total area of sponge and polyurethane sphere was 3,300 m2 m-3, density at 150 kg m-3, void ratio at 90%. DHS system was operated at ambient temperature within 82 days and stepwise increased of organic f rate from 0.5 to 1 and 1.5 kg COD m-3 d-1. The results showed that, this system performed well throughout the operational period and achieve the maximum removal of COD, BOD5, NH4+-N, and TN as 80%, 83%, 65% and 60%. The effluent of wastewater from DHS system achieved the requirement for National technical regulation on domestic wastewater of Vietnam type B QCVN 14:2008/BTNMT. In conclusion, the performance of DHS system indicated a high potential for application in removing organic matter and converting nitrogen ammonia to nitrogen nitrate, however it did not perform well for the removal of total nitrogen, it is necessary to study further by providing an anoxic zone in the system to enhance the treatment of nutrient in wastewater.

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Published

06-08-2018

How to Cite

[1]
Nguyen Trung Hiep, Le Thi Hong Tuyet, Dinh Thi Nga, and Phan Dinh Tuan, “A research on the performance of down-flow hanging sponge (DHS) reactor treating domestic wastewater”, Vietnam J. Sci. Technol., vol. 56, no. 4, pp. 482–492, Aug. 2018.

Issue

Section

Environment