Emerging investigator series: Photocatalytic membrane reactors: fundamentals and advances in preparation and application in wastewater treatment

2021 ◽  
Author(s):  
Andrew Ashley ◽  
Brandon Thrope ◽  
Mahbuboor Rahman Choudhury ◽  
Alexandre Henrique Pinto
Keyword(s):  
Wastewater Treatment ◽  
Tio2 Nanoparticles ◽  
Organic Compounds ◽  
Membrane Reactor ◽  
Membrane Reactors ◽  
Treatment Technology ◽  
Treatment Facilities ◽  
Promising Treatment ◽  
Photocatalytic Membrane Reactor

Photocatalytic membrane reactor (PMR) is a promising treatment technology for degradation of the organic compounds discharged from wastewater treatment facilities. This review presents information about the TiO2 nanoparticles, which is...

Membrane Separation Coupled with Photocatalysis for Water Supply and Wastewater Treatment

2013 ◽  
Vol 671-674 ◽  
pp. 2571-2574 ◽  
Author(s):  
Zhi Yang Wang ◽  
Ling Wang ◽  
Lin Fei Yao ◽  
Mei Le Pei ◽  
Guo Liang Zhang
Keyword(s):  
Wastewater Treatment ◽  
Water Supply ◽  
Membrane Reactor ◽  
Membrane Separation ◽  
Hybrid Technology ◽  
The Past ◽  
Continuous Running ◽  
Photocatalytic Membrane Reactor

Membrane separation coupled with photocatalysis process, which is also called photocatalytic membrane reactor (PMR), is a new hybrid technology working for water supply and wastewater treatment. Due to some unique advantages, such as nontoxic and continuous running, this kind of novel coupling systems has developed rapidly in the past few years. In this work, the characteristic and structure of configurations, photocatalysts and membranes are analyzed briefly.

scholarly journals EXPERIMENTAL STUDY OF DROPLET BIOFILTER PACKED WITH GREEN SPHAGNUM TO CLEAN AIR FROM VOLATILE ORGANIC COMPOUNDS

2017 ◽  
Author(s):  
Erika PETRAUSKAITĖ ◽  
Rasa VAIŠKŪNAITĖ
Keyword(s):  
Air Quality ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Experimental Research ◽  
Treatment Technology ◽  
Air Cleaning ◽  
Compound Pollution ◽  
Volatile Organic ◽  
Clean Air ◽  
Promising Treatment

Volatile organic compound pollution is one of the problems of outdoor and indoor environment air quality. In order to maintain good air quality, air cleaning technologies are being engaged. One of the recent biological air treatment technology is biofiltration. It is a promising treatment of air from volatile organic compounds (VOCs). Experimental research of droplet biofilter for cleaning VOCs was carried out. Biofilter load of green sphagnum was used with the aim to clean three different concentrations of pollutant toluene. Measurements of biofiltration processes were recorded after 20 and 40 days. The aim of this experimental research is to estimate biofilter efficiency using green sphagnum as a load material.

Phosphorus-doped g-C3N4 integrated photocatalytic membrane reactor for wastewater treatment

2019 ◽  
Vol 580 ◽  
pp. 1-11 ◽  
Author(s):  
Chechia Hu ◽  
Mao-Sheng Wang ◽  
Chien-Hua Chen ◽  
Yi-Rui Chen ◽  
Ping-Hsuan Huang ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Membrane Reactor ◽  
Phosphorus Doped ◽  
Photocatalytic Membrane Reactor

scholarly journals RESEARCH ON IMPROVEMENT OF THE METHOD OF PERIODIC AERATION OF WASTEWATER

2021 ◽  
pp. 90-95
Author(s):  
Mykola Mits ◽  
Kostyantin Beloshenko ◽  
Anatoly Bozhkov
Keyword(s):  
Wastewater Treatment ◽  
Control Method ◽  
Optimal Operation ◽  
Aeration Tank ◽  
Oxygen Balance ◽  
Treatment Technology ◽  
Aeration System ◽  
Entire Complex ◽  
Treatment Facilities ◽  
Aeration Process

The aeration process is a key part of biological wastewater treatment technology. But, paradoxically, during the existence of this technology, it has not changed significantly. The process of aeration of wastewater remains the largest consumer of electricity in the entire complex of treatment facilities. The possibility of adjusting the duration of the aeration cycle depending on the "explosive" change in the amount of contaminants was stated. In this case, the system must respond to this "perturbation" and adjust the duration of the aeration cycle to provide the necessary oxygen regime of biological oxidation of contaminants. The research data on the method of periodic aeration based on a comparison of the concentration of oxygen in the liquid to be cleaned and in the gases leaving after aeration are presented. The basic principle is that the aeration system continues to supply oxygen, which is no longer able to diffuse into the aerated liquid, and comes to the surface, bypassing the process of mass transfer. The experimentally established method of adjusting the duration of aeration periods for implementation in one aeration tank can be applied to a whole group of aeration tanks. Using the method in the optimal mode for each of the specified number of aeration tanks is impossible without the use of a microprocessor. Therefore, a control method was developed that allows the application of a fundamentally new algorithm for periodic aeration. This algorithm allows to increase the growth of activated sludge and to increase the efficiency of wastewater treatment. To assess the possibility of stabilizing the operation of certain aeration tanks, in the implementation of intermittent aeration by the concentration of oxygen in the liquid, a model example was considered, from which follows the differential equation of oxygen balance in the liquid. The study of this equation for stability and behavior in the phase plane makes it possible to choose the conditions under which the periodic aeration algorithm will be the most efficient in terms of purification and energy consumption. Theoretical calculation gave a mathematical justification for the experimental data. Based on numerical calculations, the condition of optimal operation of the aeration system for a group of aeration tanks is derived. Thus, it was found that the optimal concentration of oxygen in the liquid at which to start aeration is 0.06-0.12 mg / dm3. Periodic aeration with a period of 30 minutes makes it possible to maintain a stable gradient of oxygen concentrations in the liquid. The productivity of treatment plants according to the developed algorithm of controlled aeration, in accordance with the concentration of oxygen in the liquid to be cleaned, ensures the rational use of electricity.

scholarly journals Novel Submerged Photocatalytic Membrane Reactor for Treatment of Olive Mill Wastewaters

Catalysts ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 769 ◽  
Author(s):  
Maria C. Fraga ◽  
Rosa M. Huertas ◽  
João G. Crespo ◽  
Vanessa J. Pereira
Keyword(s):  
Membrane Reactor ◽  
Suspended Solids ◽  
Sol Gel ◽  
Oxygen Demand ◽  
Treatment Technology ◽  
Olive Mill Wastewaters ◽  
Water And Wastewater ◽  
Gel Technique ◽  
Olive Mill ◽  
Photocatalytic Membrane Reactor

A new hybrid photocatalytic membrane reactor that can easily be scaled-up was designed, assembled and used to test photocatalytic membranes developed using the sol–gel technique. Extremely high removals of total suspended solids, chemical oxygen demand, total organic carbon, phenolic and volatile compounds were obtained when the hybrid photocatalytic membrane reactor was used to treat olive mill wastewaters. The submerged photocatalytic membrane reactor proposed and the modified membranes represent a step forward towards the development of new advanced treatment technology able to cope with several water and wastewater contaminants.

Review on Dynamic Membrane Reactor (DMBR) for Municipal and Industrial Wastewater Treatment

2012 ◽  
Vol 455-456 ◽  
pp. 1278-1284 ◽  
Author(s):  
Xiao Ya Sun ◽  
Hua Qiang Chu ◽  
Ya Lei Zhang ◽  
Xue Fei Zhou
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Membrane Reactor ◽  
Municipal Wastewater ◽  
Future Research ◽  
Municipal Wastewater Treatment ◽  
Treatment Technology ◽  
Dynamic Membrane ◽  
Industrial Wastewater Treatment ◽  
The Future

The dynamic membrane reactor (DMBR) combined the advantages of both microbial reactor and dynamic membrane, and it’s a new municipal wastewater treatment technology. This paper summarized the technical processes, mechanisms, characteristics and application of DMBR, and the future research aspects of DMBR is also included.

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