Effects of inhibitors on nitrification in a packed-bed biological flow reactor

Shafkat A. Beg; Mirza M. Hassan

doi:10.1016/0043-1354(87)90048-0

Effects of inhibitors on nitrification in a packed-bed biological flow reactor

Shafkat A. Beg^*
, Mirza M. Hassan

^*Corresponding author for this work

King Fahd University of Petroleum & Minerals

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

28 Scopus citations

Abstract

The individual effect of trivalent arsenic, hexavalent chromium and fluoride on nitrification is studied under continuous load in a packed bed biological flow reactor. The results show that Michaelis-Menten rate expression gives the best representation of nitrification data in the absence of inhibitors. However, in the presence of inhibitors, the system follows a non-competitive mode of inhibition with the following rate expression: α_i= VmaxS K_S+S K_iS K_i+I. The values of V_max and K_s are estimated as 1.466 mg l^-1 min^-1 and 2.349 mg l^-1 respectively. The inhibitor constant K_i is evaluated as 273 mg l^-1 for trivalent arsenic, 56 mg l^-1 for hexavalent chromium and 1185 mg l^-1 for fluoride.

Original language	English
Pages (from-to)	191-198
Number of pages	8
Journal	Water Research
Volume	21
Issue number	2
DOIs	https://doi.org/10.1016/0043-1354(87)90048-0
State	Published - Feb 1987

Bibliographical note

Funding Information:
Acknowledgement--The authors wish to acknowledge the University of Petroleum & Minerals at Dhahran, Saudi Arabia for their financial support during the course of this research.

UN SDGs

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

SDG 6 Clean Water and Sanitation

Keywords

aerobic packed bed reactor
biofilm
biological kinetics
nitrification
non-competitive inhibition
wastewater treatment

ASJC Scopus subject areas

Environmental Engineering
Civil and Structural Engineering
Ecological Modeling
Water Science and Technology
Waste Management and Disposal
Pollution

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10.1016/0043-1354(87)90048-0

Cite this

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title = "Effects of inhibitors on nitrification in a packed-bed biological flow reactor",

abstract = "The individual effect of trivalent arsenic, hexavalent chromium and fluoride on nitrification is studied under continuous load in a packed bed biological flow reactor. The results show that Michaelis-Menten rate expression gives the best representation of nitrification data in the absence of inhibitors. However, in the presence of inhibitors, the system follows a non-competitive mode of inhibition with the following rate expression: αi= VmaxS KS+S KiS Ki+I. The values of Vmax and Ks are estimated as 1.466 mg l-1 min-1 and 2.349 mg l-1 respectively. The inhibitor constant Ki is evaluated as 273 mg l-1 for trivalent arsenic, 56 mg l-1 for hexavalent chromium and 1185 mg l-1 for fluoride.",

keywords = "aerobic packed bed reactor, biofilm, biological kinetics, nitrification, non-competitive inhibition, wastewater treatment",

author = "Beg, \{Shafkat A.\} and Hassan, \{Mirza M.\}",

note = "Funding Information: Acknowledgement--The authors wish to acknowledge the University of Petroleum \& Minerals at Dhahran, Saudi Arabia for their financial support during the course of this research.",

year = "1987",

month = feb,

doi = "10.1016/0043-1354(87)90048-0",

language = "English",

volume = "21",

pages = "191--198",

journal = "Water Research",

issn = "0043-1354",

publisher = "Elsevier Ltd.",

number = "2",

}

TY - JOUR

T1 - Effects of inhibitors on nitrification in a packed-bed biological flow reactor

AU - Beg, Shafkat A.

AU - Hassan, Mirza M.

N1 - Funding Information: Acknowledgement--The authors wish to acknowledge the University of Petroleum & Minerals at Dhahran, Saudi Arabia for their financial support during the course of this research.

PY - 1987/2

Y1 - 1987/2

N2 - The individual effect of trivalent arsenic, hexavalent chromium and fluoride on nitrification is studied under continuous load in a packed bed biological flow reactor. The results show that Michaelis-Menten rate expression gives the best representation of nitrification data in the absence of inhibitors. However, in the presence of inhibitors, the system follows a non-competitive mode of inhibition with the following rate expression: αi= VmaxS KS+S KiS Ki+I. The values of Vmax and Ks are estimated as 1.466 mg l-1 min-1 and 2.349 mg l-1 respectively. The inhibitor constant Ki is evaluated as 273 mg l-1 for trivalent arsenic, 56 mg l-1 for hexavalent chromium and 1185 mg l-1 for fluoride.

AB - The individual effect of trivalent arsenic, hexavalent chromium and fluoride on nitrification is studied under continuous load in a packed bed biological flow reactor. The results show that Michaelis-Menten rate expression gives the best representation of nitrification data in the absence of inhibitors. However, in the presence of inhibitors, the system follows a non-competitive mode of inhibition with the following rate expression: αi= VmaxS KS+S KiS Ki+I. The values of Vmax and Ks are estimated as 1.466 mg l-1 min-1 and 2.349 mg l-1 respectively. The inhibitor constant Ki is evaluated as 273 mg l-1 for trivalent arsenic, 56 mg l-1 for hexavalent chromium and 1185 mg l-1 for fluoride.

KW - aerobic packed bed reactor

KW - biofilm

KW - biological kinetics

KW - nitrification

KW - non-competitive inhibition

KW - wastewater treatment

UR - https://www.scopus.com/pages/publications/0023287618

U2 - 10.1016/0043-1354(87)90048-0

DO - 10.1016/0043-1354(87)90048-0

M3 - Article

AN - SCOPUS:0023287618

SN - 0043-1354

VL - 21

SP - 191

EP - 198

JO - Water Research

JF - Water Research

IS - 2

ER -

Effects of inhibitors on nitrification in a packed-bed biological flow reactor

Abstract

Bibliographical note

UN SDGs

Keywords

ASJC Scopus subject areas

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