scholarly journals The color removal and fate of organic pollutants in a pilot-scale MBR-NF combined process treating textile wastewater with high water recovery

2015 ◽  
Vol 73 (6) ◽  
pp. 1426-1433 ◽  
Author(s):  
Kun Li ◽  
Chao Jiang ◽  
Jianxing Wang ◽  
Yuansong Wei
Keyword(s):  
Membrane Fouling ◽  
Oxygen Demand ◽  
Textile Wastewater ◽  
High Water ◽  
Pilot Scale ◽  
Water Yield ◽  
Water Recovery ◽  
Treatment Efficiency ◽  
Textile Mill ◽  
Refractory Compounds

A combination of membrane bioreactor (MBR) and nanofiltration (NF) was tested at pilot-scale treating textile wastewater from the wastewater treatment station of a textile mill in Wuqing District of Tianjin (China). The MBR-NF process showed a much better treatment efficiency on the removal of the chemical oxygen demand, total organic carbon, color and turbidity in comparison with the conventional processes. The water recovery rate was enhanced to over 90% through the recycling of NF concentrate to the MBR, while the MBR-NF showed a stable permeate water quality that met with standards and could be directly discharged or further reused. The recycled NF concentrate caused an accumulation of refractory compounds in the MBR, which significantly influenced the treatment efficiency of the MBR. However, the sludge characteristics showed that the activated sludge activity was not obviously inhibited. The results of fluorescence spectra and molecular weight distribution indicated that those recalcitrant pollutants were mostly protein-like substances and a small amount of humic acid-like substances (650–6,000 Da), which contributed to membrane fouling of NF. Although the penetrated protein-like substances caused the residual color in NF permeate, the MBR-NF process was suitable for the advanced treatment and reclamation of textile wastewater under high water yield.

scholarly journals Fate of organic pollutants in a pilot-scale membrane bioreactor-nanofiltration membrane system at high water yield in antibiotic wastewater treatment

2013 ◽  
Vol 69 (4) ◽  
pp. 876-881 ◽  
Author(s):  
Jianxing Wang ◽  
Yuansong Wei ◽  
Kun Li ◽  
Yutao Cheng ◽  
Mingyue Li ◽  
...  
Keyword(s):  
Water Quality ◽  
Membrane Bioreactor ◽  
Oxygen Demand ◽  
Membrane System ◽  
High Water ◽  
Pilot Scale ◽  
Water Yield ◽  
Nanofiltration Membrane ◽  
Double Membrane ◽  
Entire Experiment

A double membrane system combining a membrane bioreactor (MBR) with a nanofiltration (NF) membrane at the pilot scale was tested to treat real antibiotic wastewater at a pharmaceutical company in Wuxi (China). The water yield of the pilot system reached over 92 ± 5.6% through recycling the NF concentrate to the MBR tank. Results showed that the pilot scale system operated in good conditions throughout the entire experiment period and obtained excellent water quality in which the concentrations of chemical oxygen demand and total organic carbon were stable at 35 and 5.7 mg/L, respectively. The antibiotic removal rates of both spiramycin (SPM) and new spiramycin in wastewater were over 95%. Organics analysis results showed that the main organics in the biological effluent were proteins, soluble microbial by-product-like, fulvic acid-like and humic-like substances. These organics could be perfectly rejected by the NF membrane. Most of the organics could be removed through recycling NF concentrate to the MBR tank and only a small part was discharged with NF concentrate and permeate.

scholarly journals Enhanced Removal of Organic Pollutants and Reactive Dye in Polyethersulfone Submerged Membrane Bioreactor (PES-SMBR) for Textile Wastewater

2021 ◽  
Vol 16 (1) ◽  
pp. 329-341
Author(s):  
Tukaram P. Chavan ◽  
Ganpat B. More ◽  
Sanjaykumar R. Thorat
Keyword(s):  
Membrane Fouling ◽  
Membrane Bioreactor ◽  
Textile Wastewater ◽  
Pilot Scale ◽  
Reactive Dye ◽  
Hollow Fibre ◽  
Flow Mode ◽  
Permeate Flux ◽  
Chemical Cleaning ◽  
Submerged Membrane Bioreactor

The present investigation was carried out to assess the operation of a pilot-scale submerged membrane bioreactor (SMBR) for the treatment of reactive dye and textile wastewater. The operation of SMBR model was conducted by using a polyethersulfone (PES) hollow fibre membrane with continuous flow mode at different HRTs at 8, 6 and 4 h, for 90 days. During the entire operation, the average permeate flux, TMP, F/M ratio and OLR was found to be 19 (L/m²/h), 2.6 (psi), 0.10 (g BOD/(g MLSS•d) and 0.89 (kg BOD/m³.d), respectively. The variations in the permeate flux, TMP, F/M ratio and OLR have not adversely effects on the operation of the SMBR model. Throughout the entire operation, despite the TP, TDS and conductivity, the high amount of COD (82%), BOD (86%), NO3-N (79%), TSS (98%), turbidity (97%) and colour (79%), removal was achieved. The permeate flux was declined by membrane fouling and it was recovered by chemical cleaning as well as regular backwashing during the entire operation. The results obtained from the study concluded that the hollow fibre ultrafiltration polyethersulfone (PES) membrane shows good performance while treating textile wastewater along with reactive dye solution.

Performance of SIDMBR for Emulsified Oil Wastewater Treatment

2013 ◽  
Vol 448-453 ◽  
pp. 478-481
Author(s):  
Zhi Yong Han ◽  
Si Su ◽  
Yan Lu ◽  
Wang Bing Du
Keyword(s):  
Wastewater Treatment ◽  
Membrane Fouling ◽  
Extracellular Polymeric Substances ◽  
Oxygen Demand ◽  
Pilot Scale ◽  
Ammonia Nitrogen ◽  
Dynamic Membrane ◽  
Emulsified Oil ◽  
Membrane Flux ◽  
Oil Wastewater

The Sequencing Inclined Dynamic Membrane Biological Reactor (SIDMBR) was investigated on a pilot scale for 60 days of emulsified oil wastewater treatment at zero excess sludge discharge. Results indicate that at hydraulic retention time of 24 h, the average removals of chemical oxygen demand (COD), ammonia nitrogen and oil are 66.83, 64.2 and 70.8% in 1~60 days, respectively. The membrane flux, biofilm quantity, and extracellular polymeric substances (EPS) content begin to change after 20th, which indicate that membrane fouling has occurred.

Performance of a pilot-scale reverse osmosis process for water recovery from biologically-treated textile wastewater

2019 ◽  
Vol 249 ◽  
pp. 109382 ◽  
Author(s):  
Erkan Sahinkaya ◽  
Selen Tuncman ◽  
Ibrahim Koc ◽  
Ali Riza Guner ◽  
Suheyla Ciftci ◽  
...  
Keyword(s):  
Reverse Osmosis ◽  
Textile Wastewater ◽  
Pilot Scale ◽  
Water Recovery

scholarly journals Fouling membrane in an anaerobic membrane bioreactor treating municipal wastewater

2017 ◽  
Vol 12 (2) ◽  
pp. 314-321 ◽  
Author(s):  
A. Cerón-Vivas ◽  
A. Noyola
Keyword(s):  
Membrane Fouling ◽  
Municipal Wastewater ◽  
Scale Up ◽  
Oxygen Demand ◽  
Pilot Scale ◽  
Cod Removal ◽  
Anaerobic Sludge ◽  
Nitrogen Gas ◽  
Gas Bubbling ◽  
Anaerobic Sludge Blanket

An anaerobic membrane reactor (AnMBR) treating municipal wastewater was evaluated. The experiments were performed using a pilot-scale up-flow anaerobic sludge blanket reactor with a submerged tubular ultrafiltration membrane at a hydraulic retention time of 8 hours. The system worked at an intermittent filtration mode (4 min on/1 min off) with and without nitrogen gas bubbling during the relaxation time (IF4NP and IF4P, respectively). The chemical oxygen demand (COD) removal achieved by the AnMBR was 68.6% and 87.9% for IF4P and IF4NP. Nitrogen bubbling also improved the filtration performance, as the elapsed time to reach 40 kPa for IF4NP and IF4P were 443 and 108 hours, respectively. Results show that intermittent filtration combined with nitrogen bubbling during the period of relaxation was an effective operation strategy in order to minimize membrane fouling and to increase COD removal.

scholarly journals Combined Effect of Colloids and SMP on Membrane Fouling in MBRs

Membranes ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 118 ◽  
Author(s):  
Dimitra Banti ◽  
Manassis Mitrakas ◽  
Georgios Fytianos ◽  
Alexandra Tsali ◽  
Petros Samaras
Keyword(s):  
Membrane Fouling ◽  
Oxygen Demand ◽  
Membrane Bioreactors ◽  
Combined Effect ◽  
Transmembrane Pressure ◽  
Soluble Microbial Products ◽  
Treatment Efficiency ◽  
Membrane Pore ◽  
Microbial Products ◽  
Membrane Pore Size

Membrane fouling investigations in membrane bioreactors (MBRs) are a top research issue. The aim of this work is to study the combined effect of colloids and soluble microbial products (SMPs) on membrane fouling. Two lab-pilot MBRs were investigated for treating two types of wastewater (wwt), synthetic and domestic. Transmembrane pressure (TMP), SMP, particle size distribution and treatment efficiency were evaluated. Chemical Oxygen Demand (COD) removal and nitrification were successful for both kinds of sewage reaching up to 95–97% and 100%, respectively. Domestic wwt presented 5.5 times more SMP proteins and 11 times more SMP carbohydrates compared to the synthetic one. In contrast, synthetic wwt had around 20% more colloids in the mixed liquor with a size lower than membrane pore size (<400 nm) than domestic. Finally, the TMP at 36 days reached 16 kPa for synthetic wwt and 11 kPa for domestic. Therefore, synthetic wwt, despite its low concentration of SMPs, caused severe membrane fouling compared to domestic, a result that is attributed to the increased concentration of colloids. Consequently, the quantity of colloids and possibly their special characteristics play decisive and more important roles in membrane fouling compared to the SMP—a novel conclusion that can be used to mitigate membranes fouling.

scholarly journals On the performance of a pilot hybrid constructed wetland for stormwater recovery in Mediterranean climate

2019 ◽  
Vol 79 (6) ◽  
pp. 1051-1059 ◽  
Author(s):  
D. Ventura ◽  
S. Barbagallo ◽  
S. Consoli ◽  
M. Ferrante ◽  
M. Milani ◽  
...  
Keyword(s):  
Constructed Wetland ◽  
Batch Reactor ◽  
Algal Growth ◽  
Oxygen Demand ◽  
Free Water ◽  
Pilot Scale ◽  
Plant Performance ◽  
Water Recovery ◽  
Good Efficiency ◽  
Metals Removal

Abstract The overall efficiency of a pilot-scale hybrid constructed wetland (H-CW), located on a retail store's parking area in Eastern Sicily, for alternative treatment of stormwater runoff and of sequential batch reactor (SBR) effluent was evaluated. Experimental activities were focused on system performances, including wastewater (WW) quality and hydraulic monitoring. System design, macrophyte growth and seasonal factors influenced the pilot plant performance. Very high removal efficiency for microbial indicators were reported within the subsurface horizontal flow unit (HF), playing a strategic role for Clostridium perfringens. The algal growth occurred in the free water surface (FWS) unit and inhibited removal efficiencies of total suspended solids (TSS), biochemical oxygen demand (BOD5) and chemical oxygen demand (COD), impairing water quality. The whole H-CW showed good efficiency in trace metals removal, especially for Pb, Zn, and Cu. Preliminary results suggested the reliability of the H-CW technology in decentralised water treatment facilities for enhancing water recovery and reuse.

Pilot-scale membrane capacitive deionisation for effective bromide removal and high water recovery in seawater desalination

Desalination ◽  
2020 ◽  
Vol 479 ◽  
pp. 114309 ◽  
Author(s):  
Pema Dorji ◽  
David Inhyuk Kim ◽  
Seungkwan Hong ◽  
Sherub Phuntsho ◽  
Ho Kyong Shon
Keyword(s):  
High Water ◽  
Pilot Scale ◽  
Water Recovery ◽  
Seawater Desalination ◽  
Bromide Removal

scholarly journals Olive Mill Wastewater: From a Pollutant to Green Fuels, Agricultural Water Source, and Bio-Fertilizer. Part 2: Water Recovery

Water ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 768 ◽  
Author(s):  
Patrick Dutournié ◽  
Mejdi Jeguirim ◽  
Besma Khiari ◽  
Mary-Lorène Goddard ◽  
Salah Jellali
Keyword(s):  
Low Cost ◽  
Oxygen Demand ◽  
Water Source ◽  
Water Shortage ◽  
Convective Drying ◽  
Water Yield ◽  
Phase System ◽  
Water Recovery ◽  
Agriculture Sector ◽  
Olive Mill

Water shortage is a very concerning issue in the Mediterranean region, menacing the viability of the agriculture sector and in some countries, population wellbeing. At the same time, liquid effluent volumes generated from agro-food industries in general and olive oil industry in particular, are quite huge. Thus, the main aim of this work is to suggest a sustainable solution for the management of olive mill wastewaters (OMWW) with possible reuse in irrigation. This work is a part of a series of papers valorizing all the outputs of a three-phase system of oil mills. It deals with recovery, by condensation, of water from both OMWW and OMWW-impregnated biomasses (sawdust and wood chips), during a convective drying operation (air velocity: 1 m/s and air temperature: 50 °C). The experimental results showed that the water yield recovery reaches about 95%. The condensate waters have low electrical conductivity and salinities but also acidic pH values and slightly high chemical oxygen demand (COD) values. However, they could be returned suitable for reuse in agriculture after additional low-cost treatment.

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