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1. Dissolved oxygen prediction in prawn ponds from a group of one step predictors

Author:
Rahman, Ashfaqur; Dabrowski, Joel; McCulloch, John
Source:
Information processing in agriculture 2020 v.7 no.2 pp. 307-317
ISSN:
2214-3173
Subject:
dissolved oxygen,   etc   ; farmers; models; ponds; prediction; shrimp;     Show all 6 Subjects
Abstract:
... In this paper we have presented a novel approach to predict dissolved oxygen in prawn ponds. It is necessary to maintain dissolved oxygen above a certain level in the ponds for expected growth and survival of the prawns. An accurate prediction of dissolved oxygen can assist farmers to take necessary measures to maintain dissolved oxygen levels ideal for prawn growth. Existing approaches to dissolv ...
DOI:
10.1016/j.inpa.2019.08.002

2. Influence of dissolved gasses in epoxy resin on resin infusion part quality

Author:
van Oosterom, Sam; Schreier, Aigoul; Battley, Mark; Bickerton, Simon; Allen, Tom
Source:
Composites 2020 v.132 pp. 105818
ISSN:
1359-835X
Subject:
dissolved oxygen,   etc   ; composite materials; deaeration; epoxides; manufacturing; oxygen;     Show all 6 Subjects
Abstract:
... This study investigates the influences of dissolved gasses on vacuum assisted resin infusion, providing a methodology which can be applied to assist in the development of robust high-performance infusion manufacturing processes. Resin degassing pressure was found to be influential on the effectiveness of degassing. Pressures under 5 mBar are recommended to ensure rapid and thorough removal of diss ...
DOI:
10.1016/j.compositesa.2020.105818

3. Compatibility of diesel engine materials with biodiesel fuel

Author:
Chandran, Davannendran
Source:
Renewable energy 2020 v.147 pp. 89-99
ISSN:
0960-1481
Subject:
dissolved oxygen,   etc   ; biodiesel; diesel engines; oxidation; temperature; water content;     Show all 6 Subjects
Abstract:
... This article aims to assess the adequacy of the existing studies to appraise the compatibility of biodiesel with fuel delivery materials (FDM) under physical diesel engine operation. The existing studies are deemed insufficient to appraise the compatibility of FDM with biodiesel under physical diesel engine operation. This is because the employed standard methods do not replicate the diesel engine ...
DOI:
10.1016/j.renene.2019.08.040

4. Cobalt oxyhydroxide nanoflakes with oxidase-mimicking activity induced chemiluminescence of luminol for glutathione detection

Author:
Yang, Xi Ju; Li, Rong Sheng; Li, Chun Mei; Li, Yuan Fang; Huang, Cheng Zhi
Source:
Talanta 2020 v.215 pp. 120928
ISSN:
0039-9140
Subject:
dissolved oxygen,   etc   ; chemiluminescence; detection limit; free radicals; glutathione; hydrogen peroxide; nanomaterials; oxidants; singlet oxygen;     Show all 9 Subjects
Abstract:
... Cobalt oxyhydroxide nanoflakes (CoOOH NFs), a typical two-dimensional (2D) nanomaterials, were found to induce chemiluminescence (CL) of luminol since the oxidase-like activity of CoOOH NFs enables the dissolved oxygen to generate various radicals (OH, O₂⁻and ¹O₂) even if without the addition of oxidants such as hydrogen peroxide, and these radicals could be scavenged by glutathione (GSH), making ...
DOI:
10.1016/j.talanta.2020.120928

5. Enhanced phosphorus storage in suspended biofilm by increasing dissolved oxygen

Author:
Zhang, Hao; Bi, Zhen; Pan, Yang; Huang, Yong; Li, Da-Peng; Shan, Jie
Source:
The Science of the total environment 2020 v.722 pp. 137876
ISSN:
0048-9697
Subject:
dissolved oxygen,   etc   ; Rhodocyclaceae; batch systems; biofilm; chemical oxygen demand; organic carbon; phosphorus; phosphorus content; wastewater treatment;     Show all 9 Subjects
Abstract:
... The phosphorus recovery efficiency in PAOs-biofilm system is so far limited to stimulating phosphorus release by adding concentrated organic carbon solution during the anaerobic stage. In present study, a PAOs-biofilm sequence batch reactor (BSBR) were operated to investigate whether increase of the phosphorus storage content via DO control can stimulate the release in the biofilm. During the oper ...
DOI:
10.1016/j.scitotenv.2020.137876

6. Comment on “Arsenite biotransformation by Rhodococcus sp.: Characterization, optimization using response surface methodology and mechanistic studies”, Science of the Total Environment, 687, 577–589(2019)

Author:
Huang, Xingyun; Wang, Zhenhua
Source:
The Science of the total environment 2020 v.721 pp. 135042
ISSN:
0048-9697
Subject:
dissolved oxygen,   etc   ; adsorption; arsenic; arsenites; bacteria; biotransformation; oxidation; response surface methodology;     Show all 8 Subjects
Abstract:
... Kumari et al. investigated the arsenic resistance and arsenic biotransforming ability in three bacterial species, mainly Rhodococcus sp.. But in the use of response surface methodology to optimize key parameters that affect the removal of arsenic, the effects of dissolved oxygen and the effect of HA addition on the adsorption or oxidation of arsenic by bacteria were ignored. We therefore recommend ...
DOI:
10.1016/j.scitotenv.2019.135042

7. Exploring the effects of carbon source level on the degradation of 2,4,6-trichlorophenol in the co-metabolism process

Author:
Wang, Jianguang; Sun, Zhirong
Source:
Journal of hazardous materials 2020 v.392 pp. 122293
ISSN:
0304-3894
Subject:
dissolved oxygen,   etc   ; 2,4,6-trichlorophenol; Acidobacteria; Proteobacteria; bacteria; batch systems; carbon; carbon metabolism; wastewater;     Show all 9 Subjects
Abstract:
... External organic sources could make up for the lack of carbon in the treatment of chlorophenol; but the impact on external carbon concentration on the degradation of 2,4,6-trichlorophenol (2,4,6-TCP) has rarely been studied. In this study, the effect of carbon addition on the degradation of 2,4,6-TCP was investigated using the lab-scale sequencing batch reactor (SBR). The results indicated that ex ...
DOI:
10.1016/j.jhazmat.2020.122293

8. Three–dimensional donor–acceptor–type photoactive material/conducting polyaniline hydrogel complex for sensitive photocathodic enzymatic bioanalysis

Author:
Qing, Min; Chen, Sheng Liang; Han, Lei; Yang, Yu Zhu; Luo, Hong Qun; Li, Nian Bing
Source:
Biosensors & bioelectronics 2020 v.158 pp. 112179
ISSN:
0956-5663
Subject:
dissolved oxygen,   etc   ; biosensors; catalytic activity; detection limit; electrochemistry; electron transfer; guanine; hydrogels; photochemistry; polyaniline; xanthine oxidase;     Show all 11 Subjects
Abstract:
... Herein, an innovative photocathodic enzymatic biosensor is proposed with poly {4,8-bis[5-(2-ethylhexyl)thiophen-2-yl]-benzo[1,2-b:4,5-b']dithiophene-2,6-diyl-alt-3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophene-4,6-diyl} (PTB7–Th) as donor–acceptor–type photoactive material and three–dimensional (3D) polyaniline hydrogels (PAniHs) as both electron transfer layer and biomolecule carrier. B ...
DOI:
10.1016/j.bios.2020.112179

9. Does submarine groundwater discharge contribute to summer hypoxia in the Changjiang (Yangtze) River Estuary?

Author:
Guo, Xiaoyi; Xu, Bochao; Burnett, William C.; Wei, Qinsheng; Nan, Haiming; Zhao, Shibin; Charette, Matthew A.; Lian, Ergang; Chen, Guangquan; Yu, Zhigang
Source:
The Science of the total environment 2020 v.719 pp. 137450
ISSN:
0048-9697
Subject:
dissolved oxygen,   etc   ; estuaries; groundwater; hypoxia; models; nutrients; organic matter; primary productivity; radionuclides; radon; rivers; summer;     Show all 12 Subjects
Abstract:
... The Changjiang (Yangtze) River Estuary (CJE) is one of the largest and most intense seasonal hypoxic zones in the world. Here we examine the possibility that submarine groundwater discharge (SGD) may contribute to the summer hypoxia. Spatial distributions of bottom water ²²²Rn suggest a hotspot discharge area in the northern section of the CJE. SGD fluxes were estimated based on a ²²²Rn mass balan ...
DOI:
10.1016/j.scitotenv.2020.137450

10. High rate 2,3-butanediol production with Vibrio natriegens

Author:
Erian, Anna Maria; Freitag, Philipp; Gibisch, Martin; Pflügl, Stefan
Source:
Bioresource technology reports 2020 v.10 pp. 100408
ISSN:
2589-014X
Subject:
dissolved oxygen,   etc   ; Escherichia coli; Vibrio natriegens; acetoin; glucose; molasses; oxygen; sucrose; sugar beet;     Show all 9 Subjects
Abstract:
... The aim of this study was to investigate if the high substrate turnover rates of Vibrio natriegens enable 2,3-butanediol production at high productivities. Introduction of a heterologous pathway led to 2,3-butanediol production at yields comparable to Escherichia coli using glucose, sucrose and sugar beet molasses. Microaerobic fed-batch cultivations maintained at 0–1% dissolved oxygen yielded a c ...
DOI:
10.1016/j.biteb.2020.100408

11. Phosphorus transformation under the influence of aluminum, organic carbon, and dissolved oxygen at the water-sediment interface: A simulative study

Author:
Cai, Ouchen; Xiong, Yuanxiao; Yang, Haijun; Liu, Jinyong; Wang, Hui
Source:
Frontiers of environmental science & engineering 2020 v.14 no.3 pp. 50
ISSN:
2095-2201
Subject:
dissolved oxygen,   etc   ; aerobic conditions; aluminum; eutrophication; lakes; organic carbon; pH; phosphorus; phytic acid; polyphosphates; sediments; wetlands;     Show all 12 Subjects
Abstract:
... The effects of sediment aluminum (Al), organic carbon (OC), and dissolved oxygen (DO) on phosphorus (P) transformation, at the water-sediment interface of a eutrophic constructed lake, were investigated via a series of simulative experiments. The above three factors had various influences on dissolved P concentration, water pH, water and surface sediment appearance, and P fractions. Additions of A ...
DOI:
10.1007/s11783-020-1227-z

12. The occurrence and role of Nitrospira in nitrogen removal systems

Author:
Mehrani, Mohamad-Javad; Sobotka, Dominika; Kowal, Przemyslaw; Ciesielski, Sławomir; Makinia, Jacek
Source:
Bioresource technology 2020 v.303 pp. 122936
ISSN:
0960-8524
Subject:
dissolved oxygen,   etc   ; ammonia; meta-analysis; nitrification; nitrogen; nitrogen content; nitrogen-fixing bacteria; oxidation; pH; temperature;     Show all 10 Subjects
Abstract:
... Application of the modern microbial techniques changed the paradigm about the microorganisms performing nitrification. Numerous investigations recognized representatives of the genus Nitrospira as a key and predominant nitrite-oxidizing bacteria in biological nutrient removal systems, especially under low dissolved oxygen and substrate conditions. The recent discovery of Nitrospira capable of perf ...
DOI:
10.1016/j.biortech.2020.122936

13. A novel feedforward control strategy for simultaneous nitrification and denitrification (SND) in aerobic granular sludge sequential batch reactor (AGS-SBR)

Author:
Chen, Wenjing; Lu, Yiming; Jin, Quan; Zhang, Miao; Wu, Jun
Source:
Journal of environmental management 2020 v.260 pp. 110103
ISSN:
0301-4797
Subject:
dissolved oxygen,   etc   ; aeration; ammonium; batch systems; denitrification; nitrification; nitrogen; sludge; total nitrogen;     Show all 9 Subjects
Abstract:
... The nitrogen removal in the aerobic granular sludge sequential batch reactor (AGS-SBR) can be achieved by the simultaneous nitrification and denitrification (SND) mode, or by the separated nitrification and denitrification stages. The SND offers a simpler operation structure than the separated nitrification and denitrification. Based on the mathematical simulation, a novel control strategy was put ...
DOI:
10.1016/j.jenvman.2020.110103

14. Secular trends in water properties at Station P in the northeast Pacific: an updated analysis

Author:
Cummins, Patrick F.; Ross, Tetjana
Source:
Progress in oceanography 2020 pp. 102329
ISSN:
0079-6611
Subject:
dissolved oxygen,   etc   ; data collection; heat; nutrients; ocean warming; oxygen; salinity; solubility; temperature;     Show all 9 Subjects
Abstract:
... Oceanographic observations collected at Station P (145°W, 50°N) in the northeast Pacific extend for over six decades, representing one of the longest uninterrupted records of subsurface ocean properties. As such, this record is well suited to examine secular trends in properties of the subarctic waters of the North Pacific. In this paper, previously published trends are reviewed and updated, based ...
DOI:
10.1016/j.pocean.2020.102329

15. An integrated water quality assessment of Damietta and Rosetta branches (Nile River, Egypt) using chemical and biological indices

Author:
El Sayed, Seleim M.; Hegab, Mahmoud H.; Mola, Hesham R. A.; Ahmed, Nasr M.; Goher, Mohame E.
Source:
Environmental monitoring and assessment 2020 v.192 no.4 pp. 228
ISSN:
0167-6369
Subject:
dissolved oxygen,   etc   ; aquatic organisms; drinking water; freshwater; irrigation; macroinvertebrates; pollution; water quality; Egypt; Nile River;     Show all 10 Subjects
Abstract:
... Rosetta and Damietta are the main branches of the Nile River in Egypt. They provide the required freshwater for different usage for about 20 million people. In the present study, chemical and biological indices were used to assess the water quality and provide a full image of the environmental status in the investigated area. Generally, the chemical parameters, except the dissolved oxygen, were at ...
DOI:
10.1007/s10661-020-8195-4

16. Deciphering the role of dissolved oxygen and N-acetyl glucosamine in governing higher molecular weight hyaluronic acid synthesis in Streptococcus zooepidemicus cell factory

Author:
Mohan, Naresh; Tadi, Subbi Rami Reddy; Pavan, Satya Sai; Sivaprakasam, Senthilkumar
Source:
Applied microbiology and biotechnology 2020 v.104 no.8 pp. 3349-3365
ISSN:
0175-7598
Subject:
dissolved oxygen,   etc   ; Streptococcus equi subsp. zooepidemicus; carbon; glucosamine; glucose; hyaluronic acid; molecular weight;     Show all 7 Subjects
Abstract:
... The present study is focused on systematic process and kinetic investigation of hyaluronic acid (HA) production strategy unraveling the role of dissolved oxygen (DO) and N-acetyl glucosamine (GlcNAc) towards the enhancement of HA titer and its molecular weight. Maintaining excess DO levels (10–40% DO) through DO-stat control and the substitution of GlcNAc at a range (5–20 g/L) with glucose (Glc) c ...
DOI:
10.1007/s00253-020-10445-x

17. Sodium azide inhibition of microbial activities and impact on sludge floc destabilization

Author:
Suresh, Akshaykumar; Pan, Chaozhi; Ng, Wun Jern
Source:
Chemosphere 2020 v.244 pp. 125452
ISSN:
0045-6535
Subject:
dissolved oxygen,   etc   ; aerobes; ammonium; bacterial communities; flocculation; fluorescence; microbial activity; microorganisms; potassium; proteins; sludge; sodium azide;     Show all 12 Subjects
Abstract:
... Absence of sludge deflocculation under prolonged (24 h or longer) conditions with dissolved oxygen (DO) less than 0.5 mg L⁻¹ was recently reported. The reduced aerobic microbial activity, was speculated, had been compensated by the activity of other bacterial (i.e. facultative) communities. To assess such a compensation mechanism and to better evaluate impact of overall microbial activity on the f ...
DOI:
10.1016/j.chemosphere.2019.125452

18. The effect of dissolved oxygen concentration on long-term stability of partial nitrification process

Author:
Cui, Bin; Yang, Qing; Liu, Xiuhong; Huang, Siting; Yang, Yubing; Liu, Zhibin
Source:
Journal of environmental sciences (China) 2020 v.90 pp. 343-351
ISSN:
1001-0742
Subject:
dissolved oxygen,   etc   ; DNA; ambient temperature; ammonia; ammonium; bacteria; batch systems; nitrification; nitrites; oxidation; sludge; sowing;     Show all 12 Subjects
Abstract:
... Dissolved oxygen (DO) concentration is regarded as one of the crucial factors to influence partial nitrification process. However, achieving and keeping stable partial nitrification under different DO concentrations were widely reported. The mechanism of DO concentration influencing partial nitrification is still unclear. Therefore, in this study two same sequencing batch reactors (SBRs) cultivate ...
DOI:
10.1016/j.jes.2019.12.012

19. Total mercury and methylmercury migration and transformation in an A2/O wastewater treatment plant

Author:
Gao, Zhiqiang; Cai, Limei; Liu, Ming; Zhang, Zuo; Gao, Bo; Zhao, Wei; Cizdziel, James V.; Chen, Laiguo
Source:
The Science of the total environment 2020 v.710 pp. 136384
ISSN:
0048-9697
Subject:
dissolved oxygen,   etc   ; mercury; methylmercury compounds; municipal wastewater; pH; particulates; pollution; sewage; sludge; temperature; wastewater treatment;     Show all 11 Subjects
Abstract:
... Municipal wastewater treatment plants (MWTPs) serve an essential role in reducing mercury (Hg) pollution. However, few studies quantified the transport and transformation of Hg through MWTPs, particularly plants based on the anaerobic-anoxic-aerobic (A²/O) process. Here, we present a mass balance for total mercury (THg) and total methylmercury (TMeHg) at the plant, and investigate the influence of ...
DOI:
10.1016/j.scitotenv.2019.136384

20. Assessing the Role of Pt Clusters on TiO₂ (P25) on the Photocatalytic Degradation of Acid Blue 9 and Rhodamine B

Author:
Benz, Dominik; Felter, Kevin M.; Köser, Jan; Thöming, Jorg; Mul, Guido; Grozema, Ferdinand C.; Hintzen, Hubertus T.; Kreutzer, Michiel T.; van Ommen, J. Ruud
Source:
Journal of physical chemistry 2020 v.124 no.15 pp. 8269-8278
ISSN:
1932-7455
Subject:
dissolved oxygen,   etc   ; adsorption; electrons; fluidized beds; oxygen; photocatalysis; platinum; pollutants; rhodamines; surface area; titanium dioxide;     Show all 11 Subjects
Abstract:
... The role of Pt on photocatalytic substrates such as TiO₂ (P25) for the decomposition of organic pollutants is still controversial in the scientific community. The well-observed behavior of an optimum catalytic activity as a function of the Pt loading is usually explained by the shift from charge separation to charge recombination behavior of Pt clusters. However, experiments supporting this explan ...
DOI:
10.1021/acs.jpcc.0c00926