IAL-CHS (internal airlift loop - ceramic honeycomb supports) reactor used for biodegradation of 2,4-dichlorophenol and phenol

2004 ◽  
Vol 49 (11-12) ◽  
pp. 247-254 ◽  
Author(s):  
Y. Zhang ◽  
X. Quan ◽  
B.E. Rittmann ◽  
J. Wang ◽  
H. Shi ◽  
...  
Keyword(s):  
Continuous Flow ◽  
Hydraulic Retention Time ◽  
Immobilized Cells ◽  
Airlift Loop Reactor ◽  
Degrading Bacteria ◽  
Internal Airlift Loop Reactor ◽  
Airlift Loop ◽  
Achromobacter Sp ◽  
Ceramic Honeycomb ◽  
Flow Experiments

The internal airlift loop reactor with ceramic honeycomb supports (IAL-CHS) was applied for biodegradation of 2,4-dichlorophenol (2,4-DCP) and phenol. A strain of DCP-degrading bacteria isolated from activated sludge, Achromobacter sp., was rapidly immobilized onto the ceramic honeycomb supports. The immobilized cells effectively biodegraded 2,4-DCP alone and together with phenol in batch and continuous-flow experiments. For example, 2,4-DCP was biodegraded from an influent concentration of 50 mg/L to less than 1 mg/L with a 6-h hydraulic retention time (HRT) in continuous flow tests. The immobilized biomass grew and accumulated through 2,4-DCP biodegradation, and the rate of degradation increased accordingly.

Flow mixing model of liquid phase in an internal airlift loop reactor

2006 ◽  
Vol 10 (2) ◽  
pp. 185-188
Author(s):  
Da-shi Nie ◽  
Wen-hao Shen ◽  
Qun-jiao Liu ◽  
Zhen-yu Zhang ◽  
Xin Wang
Keyword(s):  
Liquid Phase ◽  
Mixing Model ◽  
Loop Reactor ◽  
Airlift Loop Reactor ◽  
Flow Mixing ◽  
Internal Airlift Loop Reactor ◽  
Airlift Loop

Softening of wastewater from wet flue gas desulfurization process based on internal airlift loop reactor (IALR)

2018 ◽  
Vol 109 ◽  
pp. 125-131
Author(s):  
Xiangxin Nie ◽  
Zongming Zheng ◽  
Qiang Lu ◽  
Changqing Dong ◽  
Wu Qin ◽  
...  
Keyword(s):  
Flue Gas ◽  
Flue Gas Desulfurization ◽  
Loop Reactor ◽  
Airlift Loop Reactor ◽  
Desulfurization Process ◽  
Internal Airlift Loop Reactor ◽  
Airlift Loop

Biodegradation of microcystin [Dha7]MC-LR by a novel microcystin-degrading bacterium in an internal airlift loop bioreactor

2015 ◽  
Vol 73 (2) ◽  
pp. 267-274 ◽  
Author(s):  
Yupin Phujomjai ◽  
Anchana Somdee ◽  
Theerasak Somdee
Keyword(s):  
Health Problem ◽  
Continuous Flow ◽  
Microtiter Plate ◽  
Degrading Bacterium ◽  
Flow Experiment ◽  
Airlift Loop ◽  
Bodies Of Water ◽  
Cluster Gene ◽  
Flow Experiments ◽  
By Products

Cyanobacterial hepatotoxin microcystins are a health problem found in bodies of water in Thailand. Bacteria capable of biodegrading microcystin [Dha7]MC-LR were isolated from the Bueng Nong Khot reservoir in Khon Kaen, Thailand. The bacterium Novosphingobium isolate KKU25s was shown to degrade [Dha7]MC-LR at a concentration of 25 μg l−1 at 30 °C within 24 h. Two intermediate by-products (linearized peptide and tetrapeptide) and a cluster gene (mlrA, mlrB, mlrC and mlrD) that encodes four putative enzymes involved in [Dha7]MC-LR degradation were detected in KKU25s. KKU25s was also shown to form strong biofilms in microtiter plate assays. These assays were carried out in preparation for use of the bacterium in a bioreactor for [Dha7]MC-LR degradation. In an internal airlift loop bioreactor, the biodegradation of [Dha7]MC-LR by the bacterium was established in batch and continuous flow experiments. In the batch experiment, KKU25s degraded [Dha7]MC-LR at a concentration of 25 μg l−1 at 30 °C within 24 h, whereas in the continuous flow experiment, KKU25s degraded the toxin at the same concentration within 36 h. This study demonstrated that this bacterium could potentially be used to remove microcystins from water.

Characterisation of high-rate acidogenesis processes using a titration and off-gas analysis sensor

2005 ◽  
Vol 52 (1-2) ◽  
pp. 413-418 ◽  
Author(s):  
C. Wangnai ◽  
R.J. Zeng ◽  
J. Keller
Keyword(s):  
Gas Phase ◽  
Continuous Flow ◽  
Hydraulic Retention Time ◽  
Gas Production ◽  
Gas Analysis ◽  
High Rate ◽  
Short Term ◽  
Continuously Stirred Tank Reactor ◽  
Flow Experiments

The characteristics of the glucose degradation by acidogenesis processes were investigated both in a long-term operating laboratory-scale continuously stirred tank reactor and in short-term experiments utilising a titration and off-gas analysis (TOGA) sensor. The results obtained from continuous-flow experiments in both reactors demonstrated that the TOGA sensor can be applied as a useful tool for the study of acidogenesis processes under steady-state and dynamic conditions. No significant effect from the culture transfer could be detected in the study with the TOGA sensor. Furthermore, the variation of gas production rate could be monitored at real time by the TOGA sensor. The experiments showed that the distribution of acidogenic products in the liquid and the gas phase was significantly influenced by the hydraulic retention time at least in the short term.

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