An integrated kinetic model for organic and nutrient removal by duckweed-based wastewater treatment (DUBWAT) system

K. C. Bal Krishna; Chongrak Polprasert

doi:10.1016/j.ecoleng.2008.08.013

An integrated kinetic model for organic and nutrient removal by duckweed-based wastewater treatment (DUBWAT) system

K. C. Bal Krishna, Chongrak Polprasert

Research output: Contribution to journal › Article › peer-review

50 Citations (Scopus)

Abstract

This study was conducted to investigate the efficiency of duckweed (Lemna gibba) in treating a domestic wastewater and to develop an integrated kinetic model for organic and nutrient removal by duckweed-based wastewater treatment (DUBWAT) system. Four pilot-scale DUBWAT units, made of concrete blocks, were operated under ambient conditions (temperatures 30-36 Â°C), different hydraulic retention times (t), organic loading rates (OLR) and stocking densities (SD). The maximum COD, BOD5, NH3-N, TN and TSS removal efficiencies of 84, 88, 68, 58 and 87%, respectively, were found at optimum operating conditions of t of 10 days, OLR of 50 kgCOD/(ha-d) and SD of 0.5 kg/m2. The nitrogen uptake rate by duckweed was found to be 0.62 g-N/(m2-d). An integrated kinetic model consisting of t, OLR, SD and temperature was developed for the DUBWAT system and validated satisfactorily with data obtained from the literatures.

Original language	English
Pages (from-to)	243-250
Number of pages	8
Journal	Ecological Engineering
Volume	34
Issue number	3
DOIs	https://doi.org/10.1016/j.ecoleng.2008.08.013
Publication status	Published - 2008

Keywords

duckweeds
nitrogen removal
purification
sewage
water reuse

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.ecoleng.2008.08.013

Cite this

@article{078e99266d9848dbbf46c19d91578725,

title = "An integrated kinetic model for organic and nutrient removal by duckweed-based wastewater treatment (DUBWAT) system",

abstract = "This study was conducted to investigate the efficiency of duckweed (Lemna gibba) in treating a domestic wastewater and to develop an integrated kinetic model for organic and nutrient removal by duckweed-based wastewater treatment (DUBWAT) system. Four pilot-scale DUBWAT units, made of concrete blocks, were operated under ambient conditions (temperatures 30-36 {\^A}°C), different hydraulic retention times (t), organic loading rates (OLR) and stocking densities (SD). The maximum COD, BOD5, NH3-N, TN and TSS removal efficiencies of 84, 88, 68, 58 and 87%, respectively, were found at optimum operating conditions of t of 10 days, OLR of 50 kgCOD/(ha-d) and SD of 0.5 kg/m2. The nitrogen uptake rate by duckweed was found to be 0.62 g-N/(m2-d). An integrated kinetic model consisting of t, OLR, SD and temperature was developed for the DUBWAT system and validated satisfactorily with data obtained from the literatures.",

keywords = "duckweeds, nitrogen removal, purification, sewage, water reuse",

author = "{Bal Krishna}, {K. C.} and Chongrak Polprasert",

year = "2008",

doi = "10.1016/j.ecoleng.2008.08.013",

language = "English",

volume = "34",

pages = "243--250",

journal = "Ecological Engineering",

issn = "0925-8574",

publisher = "Elsevier B.V.",

number = "3",

}

TY - JOUR

T1 - An integrated kinetic model for organic and nutrient removal by duckweed-based wastewater treatment (DUBWAT) system

AU - Bal Krishna, K. C.

AU - Polprasert, Chongrak

PY - 2008

Y1 - 2008

N2 - This study was conducted to investigate the efficiency of duckweed (Lemna gibba) in treating a domestic wastewater and to develop an integrated kinetic model for organic and nutrient removal by duckweed-based wastewater treatment (DUBWAT) system. Four pilot-scale DUBWAT units, made of concrete blocks, were operated under ambient conditions (temperatures 30-36 Â°C), different hydraulic retention times (t), organic loading rates (OLR) and stocking densities (SD). The maximum COD, BOD5, NH3-N, TN and TSS removal efficiencies of 84, 88, 68, 58 and 87%, respectively, were found at optimum operating conditions of t of 10 days, OLR of 50 kgCOD/(ha-d) and SD of 0.5 kg/m2. The nitrogen uptake rate by duckweed was found to be 0.62 g-N/(m2-d). An integrated kinetic model consisting of t, OLR, SD and temperature was developed for the DUBWAT system and validated satisfactorily with data obtained from the literatures.

AB - This study was conducted to investigate the efficiency of duckweed (Lemna gibba) in treating a domestic wastewater and to develop an integrated kinetic model for organic and nutrient removal by duckweed-based wastewater treatment (DUBWAT) system. Four pilot-scale DUBWAT units, made of concrete blocks, were operated under ambient conditions (temperatures 30-36 Â°C), different hydraulic retention times (t), organic loading rates (OLR) and stocking densities (SD). The maximum COD, BOD5, NH3-N, TN and TSS removal efficiencies of 84, 88, 68, 58 and 87%, respectively, were found at optimum operating conditions of t of 10 days, OLR of 50 kgCOD/(ha-d) and SD of 0.5 kg/m2. The nitrogen uptake rate by duckweed was found to be 0.62 g-N/(m2-d). An integrated kinetic model consisting of t, OLR, SD and temperature was developed for the DUBWAT system and validated satisfactorily with data obtained from the literatures.

KW - duckweeds

KW - nitrogen removal

KW - purification

KW - sewage

KW - water reuse

UR - http://handle.uws.edu.au:8081/1959.7/uws:32204

U2 - 10.1016/j.ecoleng.2008.08.013

DO - 10.1016/j.ecoleng.2008.08.013

M3 - Article

SN - 0925-8574

VL - 34

SP - 243

EP - 250

JO - Ecological Engineering

JF - Ecological Engineering

IS - 3

ER -

An integrated kinetic model for organic and nutrient removal by duckweed-based wastewater treatment (DUBWAT) system

Abstract

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this