scholarly journals Study on the Effect of Membrane Active Surface Orientation in OMBR on Norfloxacin Wastewater Treatment

2021 ◽  
Vol 12 (4) ◽  
pp. 26-29
Author(s):  
Xiaoqing Chen ◽  
◽  
Litong Cai
Keyword(s):  
Water Quality ◽  
Chloride Solution ◽  
Membrane Bioreactor ◽  
Removal Rate ◽  
Forward Osmosis ◽  
Active Surface ◽  
Treatment Technology ◽  
Magnesium Chloride Solution ◽  
Membrane Flux ◽  
New Treatment

The forward osmosis membrane bioreactor (OMBR) is a kind of new treatment technology which applied forward osmosis technology to the membrane bioreactor. In this paper, the OMBR was adopted to tackle with the typical antibiotic wastewater.The influence of orientation was investigated. The results showed that the magnesium chloride solution with high osmotic pressure is advantageous for OMBR due to its superior membrane flux and a better producing water quality and the membrane flux decreases with a rise of the concentration of sewage and sludge. In this condition, the removal rate of COD and norfloxacin is 84.21% and 93.70%, respectively.

Use of membrane bioreactors for the bioremediation of chlorinated compounds polluted groundwater

2007 ◽  
Vol 55 (10) ◽  
pp. 209-216 ◽  
Author(s):  
A. Carucci ◽  
I. Manconi ◽  
L. Manigas
Keyword(s):  
Water Treatment ◽  
Human Health ◽  
Membrane Bioreactor ◽  
Removal Rate ◽  
Membrane Bioreactors ◽  
Treatment Technology ◽  
Chlorinated Compounds ◽  
System A ◽  
Agricultural Applications ◽  
Effective Water

Chlorinated compounds are widely used in agricultural applications where they are employed as components of pesticides; this leads often to pollution of groundwater near to agricultural sites, with serious effects for human health. The aim of the present study was the development of a membrane bioreactor, a new and effective water treatment technology, for the bioremediation of water polluted by 1,2-dichloroethane, 1,2-dichlorobenzene and 2-chlorophenol. Before starting-up the MBR system, a biomass was acclimated, to simultaneously degrade the three chlorinated compounds; then the acclimated biomass was inoculated into the MBR. The results showed a higher removal rate for 1,2-dichloroethane than for 1,2-dichlorobenzene; besides, the presence of 1,2-dichlorobenzene together with 1,2-dichloroethane decreased 1,2-dichloroethane specific removal rate. 2-chlorophenol was degraded only in presence of phenol as co-substrate, and the presence of phenol and 2-chlorophenol decreased 1,2-dichloroethane specific removal rate of approximately eight times, while 1,2-dichlorobenzene specific removal rate was not affected.

Study on the Treatment of Tannery Wastewater with the High Concentration of Ammonia Nitrogen by MBR

2011 ◽  
Vol 71-78 ◽  
pp. 2186-2189 ◽  
Author(s):  
Jian Gen Wang ◽  
Ya Hui Liu
Keyword(s):  
Dissolved Oxygen ◽  
Removal Efficiency ◽  
Membrane Bioreactor ◽  
Removal Rate ◽  
Ammonia Nitrogen ◽  
Tannery Wastewater ◽  
Tannery Effluent ◽  
Treatment Efficiency ◽  
High Concentration ◽  
Membrane Flux

The removal efficiency of CODCr and ammonia nitrogen of the high concentration of ammonia nitrogen from tannery effluent by membrane bioreactor (MBR) was investigated. The results showed that when the operation of MBR is stable, influent CODCr loads are less than 4.8 kg/m3•d, the average removal rate of CODCr was over 88%, the removal rate of ammonia nitrogen reached to 90%; when dissolved oxygen (DO) was 1.2mg/L and 1.8 mg/L, the reactor still has excellent treatment efficiency, and the removal rate of CODCr and ammonia nitrogen can achieved over 90%. In addition, through the study of membrane flux, it is easy to find that membrane flux decreases rapidly, the membrane requires periodic cleansing.

Preliminary study of osmotic membrane bioreactor: effects of draw solution on water flux and air scouring on fouling

2010 ◽  
Vol 62 (6) ◽  
pp. 1353-1360 ◽  
Author(s):  
Jian-Jun Qin ◽  
Kiran A. Kekre ◽  
Maung H. Oo ◽  
Guihe Tao ◽  
Chee L. Lay ◽  
...  
Keyword(s):  
Osmotic Pressure ◽  
Membrane Bioreactor ◽  
Water Flux ◽  
Forward Osmosis ◽  
Operating Conditions ◽  
Draw Solution ◽  
Membrane Flux ◽  
Osmotic Membrane Bioreactor ◽  
Flux Decline ◽  
Preliminary Study

Preliminary study on a novel osmotic membrane bioreactor (OMBR) was explored. Objective of this study was to investigate the effects of draw solution on membrane flux and air scouring at the feed side on fouling tendency in a pilot OMBR system composing the anoxic/aerobic and forward osmosis (FO) processes. Domestic sewage was the raw feed, FO membrane from HTI and NaCl/MgSO4 draw solutions were used in the experiments. Fluxes of 3 l/m2/h (LMH) and 7.2 LMH were achieved at osmotic pressure of 5 and 22.4 atm, respectively. No significant flux decline was observed at 3 LMH over 190 h and at 7.2 LMH over 150 h when air scouring was provided at the feed side of the membrane. However, without air scouring, the flux at 22.4 atm osmotic pressure declined by 30% after 195 h and then levelled off. The potential advantages of the fouling reversibility with air scouring under the operating conditions of the pilot OMBR and better water quality in OMBR over the conventional MBR were preliminarily demonstrated.

Progress in the Application of Refractory Dyeing Wastewater Treatment Processes

2012 ◽  
Vol 246-247 ◽  
pp. 635-639
Author(s):  
Jie Yang
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Dyeing Wastewater ◽  
Treatment Technology ◽  
Water Shortages ◽  
Organic Matters ◽  
Treatment Processes ◽  
Treatment Technologies ◽  
Quality Water ◽  
New Treatment

The state and progress in the treatment technology of dyeing wastewater are summarized in this paper, especially the new treatment technologies coming about in the latest years. The developing trend of treatment for organic matters is discussed as well. In the meantime, regional and water-quality water shortages have also been proven to be the bottlenecks for imposing restrictions on the development of the society and economy after land and energy.

The Research of Wastewater Treatment by Membrane Bioreactor (MBR)

2014 ◽  
Vol 618 ◽  
pp. 376-379
Author(s):  
Nan Lu ◽  
Jia Chuan Chen ◽  
Gui Hua Yang
Keyword(s):  
Wastewater Treatment ◽  
Biological Treatment ◽  
Membrane Bioreactor ◽  
Removal Rate ◽  
Treatment Technology ◽  
Effect Of Ph ◽  
Maximum Value

Membrane bioreactor is a combination of membrane and sewage biological treatment technology, which is the new wastewater treatment technology .In this paper, the effect of pH and NH3-N load on membrane bioreactor for wastewater treatment is studied. Through the use of artificial mixed wastewater experiments,the results are as follows:The effect of pH on the effluent COD is not obvious, on the removal of NH3-N is very large. Taking into account of removal of organics and NH3-N, the pH should be controlled at 8.0.The removal rate of NH3-N decreased significantly with the increase of the NH3-N load. When the NH3-N load is 0.023 Kg/m3· d, the removal rate reach the maximum value. In this case,the load of COD is 1.1 Kg/ m3.d.

Study on the Membrane Flux of Membrane Reactor and Fouling Control of PVA Membrane

2011 ◽  
Vol 356-360 ◽  
pp. 133-137
Author(s):  
Yan Yan Liu ◽  
Wen Long Zhang
Keyword(s):  
Membrane Fouling ◽  
Membrane Reactor ◽  
Membrane Bioreactor ◽  
Removal Rate ◽  
Fouling Control ◽  
Membrane Flux ◽  
Long Time ◽  
New Type ◽  
Cod Removal Rate ◽  
Main Factor

Membrane is the key that restrict Membrane Bioreactor technology be extensive applied, the membrane flux is an important factor to measure membrane, membrane fouling is the main factor which result in the membrane flux low, the membrane fouling research on a new type of hydrophilic PVA membrane .The experiment results show that the membrane flux is high with the use of PVA membrane. The COD removal rate can reach 90% on average, with long time running, the flux has declined. The flux can be maintained at 168 L/m2.h on the conditions that low-flux, intermittent effluent, backwashing, intermittent aeration, change of aeration intensity and physical cleaning. The membrane bioreactor using PVA membrane was efficient and stable in operation.

TEKNOLOGI PENYEDIAAN AIR MINUM UNTUK KEADAAN TANGGAP DARURAT

2018 ◽  
Vol 6 (1) ◽  
Author(s):  
Arie Herlambang
Keyword(s):  
Water Quality ◽  
Emergency Response ◽  
Distribution Systems ◽  
Treatment Plant ◽  
Piping System ◽  
Process Technology ◽  
Treatment Technology ◽  
Disaster Victims ◽  
Ultra Filtration ◽  
Quality Water

In the event of natural disasters such as earthquakes, tsunamis, landslides, floods and droughts, water occupies a key role in disaster relief. The presence of water is important for drinking, cooking and support the refugee areas of environmental sanitation and avoiding disaster victims of diseases waterborn disease. Water problem in disaster conditions may occur partly as a result: the disturbance of water sources because change of water quality, to become turbid or salty, the destruction of a piping system, treatment plant damage, disruption of distribution systems, or the scarcity of water in evacuation areas. Introduction of water quality becomes important to determine which process technology will be used and saved investments in emergency conditions. Priority handling of clean water usually comes first in the refugee areas with communal system, because the need of water for bathing, washing and toilet is big enough, while for a drink in the early events during disaster dominated by bottled water, but for their long-term, they have to boil water. For remote areas and difficult to reach individuals who usually use  system more simple and easily operated. Water Supply Technology for emergency response has the characteristic 1). Able to operate with all sorts of water conditions (flexible adaptable), 2). Can be operated easily, 3). Does not require much maintenance, 4). Little use of chemicals, and 5). Portable and easy removable (Mobile System). Keywords :  Water Quality, Water Treatment Technology, Drinking Water, Emergency Response, filtration, ceramic filtration, Ultra filtration, Reverse Osmosis, Ultraviolet Sterilizer, Ozonizer, Disinfection.

scholarly journals Modeling and Sensitivity Analysis of the Forward Osmosis Process to Predict Membrane Flux Using a Novel Combination of Neural Network and Response Surface Methodology Techniques

Membranes ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 70
Author(s):  
Jasir Jawad ◽  
Alaa H. Hawari ◽  
Syed Javaid Zaidi
Keyword(s):  
Response Surface Methodology ◽  
Experimental Design ◽  
Response Surface ◽  
Forward Osmosis ◽  
Feed Solution ◽  
Operating Conditions ◽  
Ann Model ◽  
Membrane Flux ◽  
Input Variables ◽  
Rsm Model

The forward osmosis (FO) process is an emerging technology that has been considered as an alternative to desalination due to its low energy consumption and less severe reversible fouling. Artificial neural networks (ANNs) and response surface methodology (RSM) have become popular for the modeling and optimization of membrane processes. RSM requires the data on a specific experimental design whereas ANN does not. In this work, a combined ANN-RSM approach is presented to predict and optimize the membrane flux for the FO process. The ANN model, developed based on an experimental study, is used to predict the membrane flux for the experimental design in order to create the RSM model for optimization. A Box–Behnken design (BBD) is used to develop a response surface design where the ANN model evaluates the responses. The input variables were osmotic pressure difference, feed solution (FS) velocity, draw solution (DS) velocity, FS temperature, and DS temperature. The R2 obtained for the developed ANN and RSM model are 0.98036 and 0.9408, respectively. The weights of the ANN model and the response surface plots were used to optimize and study the influence of the operating conditions on the membrane flux.

scholarly journals Towards Water and Energy Self-Sufficiency: a Closed-Loop, Solar-Driven, Low-Tech Laundry Pilot Facility (LaundReCycle) for the Reuse of Laundry Wastewater

2021 ◽  
Author(s):  
Devi Buehler ◽  
Nadine Antenen ◽  
Matthias Frei ◽  
Christoph Koller ◽  
Diederik P. L. Rousseau ◽  
...  
Keyword(s):  
Water Quality ◽  
Energy Consumption ◽  
Second Life ◽  
Removal Rate ◽  
Treated Wastewater ◽  
Water Losses ◽  
Batch Mode ◽  
Self Sufficiency ◽  
Cod Removal Rate ◽  
Photovoltaic Plant

AbstractIn the scope of this study, a pilot facility for the recycling of laundry effluent was developed and tested. With the aim to enable nearly complete energy and water self-sufficiency, the system is powered by a photovoltaic plant with second-life batteries, treats the wastewater within the unit and constantly reuses the treated wastewater for washing in a closed cycle. The technology for wastewater treatment is based on a low-tech approach consisting of a physical/mechanical pre-treatment and biological treatment in trickling filter columns. The treatment process is operated in batch mode for a capacity of five washing cycles per day. During five weeks of operation water quality, energy consumption and production, water losses and washing performance were monitored. The system recovered 69% of the used water for the washing machine while treating the wastewater to the necessary water quality levels. The average COD removal rate per cycle was 92%. Energy analysis was based on modelled data of the monitored energy consumption. With the current set-up, an internal consumption rate of 80% and self-sufficiency of 30% were modelled. Future developments aim at increasing water and energy self-sufficiency and optimizing the water treatment efficiency.

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