A New Approach to Quantify Spatial Distribution of Biofilm Kinetic Parameters by In Situ Determination of Oxygen Uptake Rate (OUR)

2009 ◽  
Vol 43 (3) ◽  
pp. 757-763 ◽  
Author(s):  
Xiao-Hong Zhou ◽  
Yu-Qin Qiu ◽  
Han-Chang Shi ◽  
Tong Yu ◽  
Miao He ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Oxygen Uptake ◽  
Kinetic Parameters ◽  
Uptake Rate ◽  
Oxygen Uptake Rate ◽  
New Approach

scholarly journals Determination of rate parameter for kinetics of nitrification

2018 ◽  
Vol 4 (2) ◽  
pp. 234
Author(s):  
S R Juliastuti ◽  
J Baeyens ◽  
C Creemers ◽  
J Degreve
Keyword(s):  
Oxygen Uptake ◽  
Organic Compounds ◽  
Total Nitrogen ◽  
Uptake Rate ◽  
Oxygen Uptake Rate ◽  
Inhibitory Effect ◽  
Rate Parameter ◽  
Autotrophic Biomass ◽  
Kinetics Of

Determination of rate parameter for kinetics of nitrification The nitrification process is the bottleneck step in the total nitrogen removal. The formation of nitrate is considered as the rate limiting step in the whole process and its kinetics determine the design of the nitrification reactor. Heavy metals (Zn2+ and Cu2+) and different organic compounds are used as micropollutants. These kinetics were experimentally measured by respirometry. In line with the aim of the paper, the experimental investigation are conducted to develop design equations to describe kinetic rate relationships under optimum conditions, study the parameter influence such as pH and inhibition by reaction intermediates and inhibition by external pollutants. Results demonstrate that the maximum value of the specific growth rate of autotrophic biomass() is 1.02 day at pH=7 and decreases at pH 7.5; inhibition occurs at substrate (NH4) concentrations in excess of 15 mg N/l; inhibition occurs at increasing concentrations of NO –N and Cu2+ has more pronounced inhibitory effect than Zn2+. The inhibitory effect of organic compounds are listed as the Chlorobenzene > Trichloroethylene> Phenol> Ethyl benzene; the experimental oxygen uptake rate (OUR)-test results the autotrophic kinetic parameter values, which can be used in design equations. Keywords: Respirometry,  Autotrophic Biomass,  Nitrification, Oxygen Uptake Rate Abstrak Proses nitrifikasi merupakan langkah penting pada penurunan kadar total nitrogen. Pembentukan nitrat dianggap sebagai tahap pembatas kecepatan reaksi pada keseluruhan proses dan kinetikanya menentukan perancangan dari bagian proses nitrifikasi. Logam berat (Zn2+ dan Cu2+) dan berbagai jenis komponen organik digunakan sebagai mikropolutan. Kinetika ini secara eksperimental diukur menggunakan respirometer. Tujuan penelitian adalah mengembangkan persamaan perancangan yang menggambarkan hubungan laju kinetika pada kondisi optimum, studi pengaruh parameter seperti pH, inhibisi karena reaksi intermediat, dan inhibisi oleh polutan dari luar. Hasil penelitian ditunjukkan sebagai berikut: harga laju pertumbuhan  biomasa autotrof maksimum spesifik  adalah 1,02 hari-1 pada pH=7 dan menurun pada pH 7,5; inhibisi terjadi pada konsentrasi substrat (NH4+) lebih besar dari 15 mg N/l; inhibisi terjadi pada peningkatan  konsentrasi NO -N ;Cu2+  lebih dikenal sebagai penyebab  inhibisi  daripada Zn2+. Efek inhibisi dari komponen organik di daftar mulai dari Chlorobenzene sampai Ethylbenzen. Tes OUR menghasilkan harga parameter kinetika yang dapat dipakai pad apersamaan perencanaan  lumpur aktif nitrifikasi. Kata Kunci: Respirometer, BiomasaAutotrof, Nitrifikasi, Laju Kenaikan Oksigen

A novel in situ probe for oxygen uptake rate measurement in mammalian cell cultures

2011 ◽  
Vol 28 (2) ◽  
pp. 581-586 ◽  
Author(s):  
Larissa Behr ◽  
Klaus Joeris ◽  
Mark Burnett ◽  
Thomas Scheper
Keyword(s):  
Oxygen Uptake ◽  
Mammalian Cell ◽  
Cell Cultures ◽  
Uptake Rate ◽  
Oxygen Uptake Rate ◽  
Rate Measurement ◽  
Mammalian Cell Cultures

scholarly journals Application of a modified OxiTop® respirometer for laboratory composting studies

2016 ◽  
Vol 42 (1) ◽  
pp. 56-62 ◽  
Author(s):  
Krystyna Malińska
Keyword(s):  
Oxygen Uptake ◽  
Uptake Rate ◽  
Oxygen Uptake Rate ◽  
Fixed Ratio ◽  
Apple Pomace ◽  
Glass Vessel ◽  
Moisture Contents ◽  
Wide Mouth ◽  
Closed Steel

Abstract This study applied a modified OxiTop® system to determine the oxygen uptake rate during a 2-day respiration test of selected composting materials at different moisture contents, air-filled porosities and composition of composting mixtures. The modification of the OxiTop® respirometer included replacement and adjustment of a glass vessel (i.e. a 1.9-L glass vessel with wide mouth was used instead of a standard 1-L glass bottle, additionally the twist-off vessel lid was adjusted to attach the measuring head) and application of a closed steel mesh cylinder of 5 cm in diameter and 10 cm in height with the open surface area of the mesh of approximately 56.2%. This modification allowed obtaining different bulk densities (and thus air-porosities) of the investigated composting materials in laboratory composting studies. The test was performed for apple pomace and composting mixtures of apple pomace with wood chips at ratios of 1:0.5, 1:1, 1:1.5 (d.w), moisture contents of 60%, 65% and 75% and air-filled porosities ranging from 46% to 1%. Due to diverse biodegradability of the investigated apple pomace and composting mixtures this test allows for the determination of the effects of different air-porosities (due to compaction in a pile) on the oxygen uptake rate for mixtures with a fixed ratio of a bulking agent. The described method allows for laboratory determination of the effects of moisture content and compaction on biodegradation dynamics during composting.

DEVELOPMENT OF A NEW PROBE FOR IN-SITU OXYGEN UPTAKE RATE (OUR) MEASUREMENT IN MAMMALIAN CELL CULTURE PROCESSES

2007 ◽  
Vol 40 (4) ◽  
pp. 273-276
Author(s):  
K. Joeris ◽  
L. Behr ◽  
M. Burnett ◽  
T. Scheper ◽  
K. Konstantinov
Keyword(s):  
Cell Culture ◽  
Oxygen Uptake ◽  
Mammalian Cell ◽  
Uptake Rate ◽  
Oxygen Uptake Rate ◽  
Mammalian Cell Culture

Online monitoring of the cell-specific oxygen uptake rate with an in situ combi-sensor

2019 ◽  
Vol 412 (9) ◽  
pp. 2111-2121
Author(s):  
Katharina Dahlmann ◽  
Christoph Busse ◽  
Florian Aupert ◽  
Ingo de Vries ◽  
Daniel Marquard ◽  
...  
Keyword(s):  
Oxygen Uptake ◽  
Uptake Rate ◽  
Online Monitoring ◽  
Oxygen Uptake Rate ◽  
Specific Oxygen Uptake Rate
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