scholarly journals Development of an Electrochemical Process for Blackwater Disinfection in a Freestanding, Additive-Free Toilet

2017 ◽  
Author(s):  
Katelyn Sellgren ◽  
◽  
Christopher Gregory ◽  
Michael Hunt ◽  
Ashkay Raut ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Electrochemical Process ◽  
Mixed Metal Oxide ◽  
Boron Doped Diamond ◽  
High Effectiveness ◽  
Electrochemical Disinfection ◽  
E Coli ◽  
Boron Doped ◽  
Improved Sanitation ◽  
Conventional Wastewater Treatment

Electrochemical disinfection has gained interest as an alternative to conventional wastewater treatment because of its high effectiveness and environmental compatibility. Two and a half billion people currently live without improved sanitation facilities. Our research efforts are focused on developing and implementing a freestanding, additive-free toilet system that treats and recycles blackwater on site. In this study, we sought to apply electrochemical disinfection to blackwater. We compared commercially available boron-doped diamond (BDD) and mixed metal oxide (MMO) electrodes for disinfection efficiency in E. coli–inoculated model wastewater. The MMO electrodes were found to be more efficient and thus selected for further study with blackwater. The energy required for disinfection by the MMO electrodes increased with the conductivity of the medium, decreased with increased temperature, and was independent of the applied voltage. Fecal contamination considerably increased the energy required for blackwater disinfection compared to model wastewater, demonstrating the need for testing in effluents representing the conditions of the final application.

scholarly journals Low-coherence photonic method of electrochemical processes monitoring

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Monika Kosowska ◽  
Paweł Jakóbczyk ◽  
Michał Rycewicz ◽  
Alex Vitkin ◽  
Małgorzata Szczerska
Keyword(s):  
Electrochemical Process ◽  
Electrochemical Measurements ◽  
Boron Doped Diamond ◽  
Silica Substrate ◽  
Low Coherence ◽  
Optical Responses ◽  
Boron Doped ◽  
Fabry Perot ◽  
Hybrid Characterization

AbstractWe present an advanced multimodality characterization platform for simultaneous optical and electrochemical measurements of ferrocyanides. Specifically, we combined a fiber-optic Fabry–Perot interferometer with a three-electrode electrochemical setup to demonstrate a proof-of-principle of this hybrid characterization approach, and obtained feasibility data in its monitoring of electrochemical reactions in a boron-doped diamond film deposited on a silica substrate. The film plays the dual role of being the working electrode in the electrochemical reaction, as well as affording the reflectivity to enable the optical interferometry measurements. Optical responses during the redox reactions of the electrochemical process are presented. This work proves that simultaneous opto-electrochemical measurements of liquids are possible.

scholarly journals A Comparative Electrochemical-Ozone Treatment for Removal of Phenolphthalein

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
V. M. García-Orozco ◽  
C. E. Barrera-Díaz ◽  
G. Roa-Morales ◽  
Ivonne Linares-Hernández
Keyword(s):  
Electrochemical Treatment ◽  
Electrochemical Process ◽  
Ozone Treatment ◽  
Acidic Ph ◽  
Alkaline Ph ◽  
Diamond Electrodes ◽  
Boron Doped Diamond ◽  
Boron Doped ◽  
Electrochemical Processes ◽  
Density Values

The degradation of aqueous solutions containing phenolphthalein was carried out using ozone and electrochemical processes; the two different treatments were performed for 60 min at pH 3, pH 7, and pH 9. The electrochemical oxidation using boron-doped diamond electrodes processes was carried out using three current density values: 3.11 mA·cm−2, 6.22 mA·cm−2, and 9.33 mA·cm−2, whereas the ozone dose was constantly supplied at 5±0.5 mgL−1. An optimal degradation condition for the ozonation treatment is at alkaline pH, while the electrochemical treatment works better at acidic pH. The electrochemical process is twice better compared with ozonation.

Aqua-Biomant®: integrated biological and electrochemical oxidation for industrial wastewater treatment

2007 ◽  
Vol 55 (12) ◽  
pp. 195-200 ◽  
Author(s):  
A. Rüdiger ◽  
I. Rüdiger ◽  
L. Jurisevic
Keyword(s):  
Wastewater Treatment ◽  
Electrochemical Oxidation ◽  
Industrial Wastewater ◽  
Innovative Technology ◽  
Boron Doped Diamond ◽  
Industrial Wastewater Treatment ◽  
Boron Doped ◽  
High Efficient ◽  
Persistent Organic Compounds ◽  
Total Residence Time

An innovative technology for industrial wastewater treatment has been developed. The main focus of the new system is a transformation of persistent organic compounds (biorecalcitrant COD) into a biodegradable fraction, followed by high efficient biological elimination using specialised bacteria's. To fulfill these targets the Aqua-Biomant® process integrates two treatment steps: an aerated biological upflow filter and a electrochemical oxidation technique using boron doped-diamond electrodes. The advantages of the process are high efficient COD removal with reduced energy consumption combined with low total residence time.

scholarly journals Boron doped diamond electrode for the wastewater treatment

2006 ◽  
Vol 17 (2) ◽  
pp. 227-236 ◽  
Author(s):  
Marco Antonio Quiroz Alfaro ◽  
Sergio Ferro ◽  
Carlos Alberto Martínez-Huitle ◽  
Yunny Meas Vong
Keyword(s):  
Wastewater Treatment ◽  
Boron Doped Diamond ◽  
Diamond Electrode ◽  
Boron Doped ◽  
Boron Doped Diamond Electrode

scholarly journals Ultrasound and UV technologies for wastewater treatment using boron-doped diamond anodes

2022 ◽  
pp. 100935
Author(s):  
Alana Carolyne Crispim ◽  
Suelya da Silva Mendonça de Paiva ◽  
Danyelle Medeiros de Araújo ◽  
Fernanda Lourdes Souza ◽  
Elisama Vieira Dos Santos
Keyword(s):  
Wastewater Treatment ◽  
Boron Doped Diamond ◽  
Boron Doped

scholarly journals Electrochemical degradation of diclofenac by boron doped diamond anode: degradation mechanism, pathways and influencing factors

2021 ◽  
Author(s):  
Huimin Qiu ◽  
Pingping Fan ◽  
Xueying Li ◽  
Guangli Hou
Keyword(s):  
Influencing Factors ◽  
Wastewater Treatment Plants ◽  
Degradation Products ◽  
Degradation Kinetics ◽  
Degradation Mechanism ◽  
Electrochemical Process ◽  
Sodium Sulphate ◽  
Boron Doped Diamond ◽  
Quenching Effect ◽  
Boron Doped

Abstract Nonsteroidal anti-inflammatory drugs (NAIDS) have been widely detected in wastewater and surface water, which indicates the removal of NAIDS by wastewater treatment plants was not efficiency. Electrochemical advanced oxidation technology is considered to be an effective process. This study presents an investigation of the kinetics, mechanism and influencing factors of Diclofenac (DCF) degradation by an electrochemical process with the boron doped diamond anodes. Relative operating parameters and water quality parameters are examined. It appears that the degradation follows the pseudo-first-order degradation kinetics. DCF degradation was accelerated with the increase of pH from 6 to 10. The degradation was promoted by the addition of electrolyte concentrations and current density. HA and HCO3− significantly inhibited the degradation, whereas Cl− accelerated it. According to the inhibition tests, hydroxyl radicals (•OH) and sulfate radicals (SO4•–) contributed 76.5% and 6.5%, respectively, to the degradation. Sodium sulphate remains a more effective electrolyte, compared to sodium nitrate and sodium phosphate, suggesting the quenching effect of nitrate and phosphate on •OH. Major DCF transformation products were identified. According to the degradation products detected by liquid chromatography-mass spectrometry, hydroxylation and decarboxylation are the main pathways to DCF degradation; meanwhile, dechlorination, chlorination and nitro substitution are also included.

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