A Biophysicochemical Model for NO Removal by the Chemical Absorption–Biological Reduction Integrated Process

2016 ◽  
Vol 50 (16) ◽  
pp. 8705-8712 ◽  
Author(s):  
Jingkai Zhao ◽  
Yinfeng Xia ◽  
Meifang Li ◽  
Sujing Li ◽  
Wei Li ◽  
...  
Keyword(s):  
Integrated Process ◽  
Chemical Absorption ◽  
Biological Reduction ◽  
No Removal

scholarly journals Evaluation of polypyrrole-modified bioelectrodes in a chemical absorption-bioelectrochemical reduction integrated system for NO removal

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Tianjiao Guo ◽  
Chunyan Zhang ◽  
Jingkai Zhao ◽  
Cunhao Ma ◽  
Sujing Li ◽  
...  
Keyword(s):  
High Efficiency ◽  
Removal Rate ◽  
Low Cost ◽  
Reduction Rate ◽  
Strengthening Mechanism ◽  
Integrated System ◽  
Electrolysis Cell ◽  
Chemical Absorption ◽  
Biological Reduction ◽  
No Removal

Abstract A Chemical absorption-bioelectrochemical reduction (CABER) system is based on Chemical absorption-biological reduction (CABR) system, which aims at NO removal and has been studied in many of our previous works. In this paper, we applied polypyrrole (PPy) on the electrode of bioelectrochemical reactor (BER) of CABER system, which induced a much higher current density in the cyclic voltammetry (CV) curve for the electrode itself and better NO removal rate in the system. In addition, a Microbial Electrolysis Cell (MEC) is constructed to study its strengthening mechanism. Results shows that PPy-MEC has a greater Faraday efficiency and higher reduction rate of Fe(III)EDTA and Fe(II)EDTA-NO in the solution when compared to original Carbon MEC, which confirms the advantage of PPy-modified electrode(s) in the CABER system. The results of this study are reported for illustration of potential of CABER technology and design of low-cost high-efficiency NOx control equipment in the future.

Two-Stage Chemical Absorption–Biological Reduction System for NO Removal: System Start-up and Optimal Operation Mode

2018 ◽  
Vol 32 (7) ◽  
pp. 7701-7707 ◽  
Author(s):  
Chunyan Zhang ◽  
Jingkai Zhao ◽  
Cheng Sun ◽  
Sujing Li ◽  
Dongxiao Zhang ◽  
...  
Keyword(s):  
Operation Mode ◽  
Optimal Operation ◽  
Chemical Absorption ◽  
Two Stage ◽  
Biological Reduction ◽  
No Removal ◽  
Reduction System ◽  
Start Up ◽  
Removal System

Two-Stage Chemical Absorption-Biological Reduction System for NO Removal: Model Development and Footprint Estimation

2017 ◽  
Vol 31 (8) ◽  
pp. 8454-8461 ◽  
Author(s):  
Jingkai Zhao ◽  
Chunyan Zhang ◽  
Meifang Li ◽  
Sujing Li ◽  
Wei Li ◽  
...  
Keyword(s):  
Model Development ◽  
Chemical Absorption ◽  
Two Stage ◽  
Biological Reduction ◽  
No Removal ◽  
Reduction System ◽  
Removal Model

scholarly journals Effects of cobalt-histidine absorbent on aerobic denitrification by Paracoccus versutus LYM

AMB Express ◽  
2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Chaoyue Sun ◽  
Yu Zhang ◽  
Zhenping Qu ◽  
Jiti Zhou
Keyword(s):  
Nitrate Reduction ◽  
Nitrite Reduction ◽  
Aerobic Denitrification ◽  
Chemical Absorption ◽  
Binding Ability ◽  
Biological Reduction ◽  
Distinct Effect ◽  
The Future

AbstractTo overcome the problem that ferrous complexes are easily oxidized by O2 and then lose NO binding ability in the chemical absorption-biological reduction (CABR) process, cobalt(II)-histidine [Co(II)His] was proposed as an alternative. To evaluate the applicability of Co(II)His, the effects of CoHis absorbent on the aerobic denitrification by Paracoccus versutus LYM were investigated. Results indicated that His significantly promoted nitrite reduction. The inhibition effects of CoHis absorbent could be substantially alleviated by increasing the initial His/Co2+ to 4 or higher. CoHis with concentrations of 4, 8, 12, 16 and 20 mM presented no distinct effect on nitrite reduction, but slightly inhibited the reduction of nitrate, resulting in longer lag of nitrate reduction, and obviously promoted the growth of strain LYM. In the presence of 5, 10, 15 and 20 mM CoHis absorbent, the main denitrification product was N2 (not less than 95.0%). This study is of significance in verifying the applicability of Co(II)His in the CABR process, and provides a referable CoHis absorbent concentration as 20 mM with an initial His/Co2+ of 4 for the future experiments.

A Critical Review of the Biological Processes in the Chemical Absorption-biological Reduction Integrated System for NO Removal

2021 ◽  
Vol 07 ◽  
Author(s):  
Wei Li
Keyword(s):  
Catalytic Reduction ◽  
Low Cost ◽  
Reduction Process ◽  
Integrated System ◽  
Future Research ◽  
Small Scale ◽  
Biological Processes ◽  
Chemical Absorption ◽  
Biological Reduction ◽  
Biological Reaction

: Exploring low-cost, green and safe technologies to provide an alternative to the conventional selective catalytic reduction process is key to the control of NOx emitted from small-scale boilers and other industrial processes. To meet the demand, the chemical absorption-biological reduction integrated system has been developing recently. chemical absorption-biological reduction integrated system applies Fe(II)EDTA for NO absorption and iron-reducing and denitrifying bacteria for absorbent regeneration. Many studies have focused on the enhancements of mass transfer and biological reaction, among which the biological processes were the rate-limiting steps. This review summarizes the current researches on the biological processes in the CABR system, which focuses on the mechanism and enhancement of biochemical reactions, and provides the possible directions of future research.

Sign in / Sign up

Export Citation Format

Share Document