Lessons Learned on Long-Term Operation of MBBR for Refinery Wastewater Treatment

2009 ◽  
Vol 2009 (15) ◽  
pp. 2479-2494
Author(s):  
Christian Cabral ◽  
Eoin Syron ◽  
Ray C. Asencio ◽  
Chandler Johnson
Keyword(s):  
Wastewater Treatment ◽  
Lessons Learned ◽  
Refinery Wastewater ◽  
Term Operation

Procuring 230 Football Fields of Membrane - Strategy, Results and Lessons Learned

2016 ◽  
Vol 11 (2) ◽  
pp. 266-272
Author(s):  
J. Grundestam
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Action Plan ◽  
Lessons Learned ◽  
Residential Areas ◽  
The Baltic Sea ◽  
The Baltic ◽  
The City ◽  
The Eu

Stockholm is currently one of Europe’s fastest growing cities, with its population increasing by approximately 1.5% per year, corresponding to 15,000 to 20,000 people. Sweden’s commitment to the Baltic Sea Action Plan and the EU Water Directive will lead to more stringent effluent requirements (6 mg-Tot-N/l, 0.2 mg-Tot-P/l and 6 mg-BOD7/l), and wastewater treatment in Stockholm will require major investment to handle these challenges. As Stockholm Vatten’s two wastewater treatment plants (WWTPs) – Bromma, 320,000 people, and Henriksdal, 780,000 people – are both located in or near residential areas in the city, plant development must be coordinated with its needs on economic, political, sustainable and long-term bases. Both WWTPs being facilities located underground also pose a challenge for any extension works.

Baffled membrane bioreactor (BMBR) for advanced wastewater treatment: easy modification of existing MBRs for efficient nutrient removal

2005 ◽  
Vol 52 (10-11) ◽  
pp. 427-434 ◽  
Author(s):  
K. Kimura ◽  
Y. Watanabe
Keyword(s):  
Wastewater Treatment ◽  
Nutrient Removal ◽  
Membrane Bioreactor ◽  
Municipal Wastewater ◽  
Reaction Chamber ◽  
Municipal Wastewater Treatment ◽  
Term Operation ◽  
Constant Interval ◽  
Single Reaction

In this study, a novel membrane bioreactor (MBR) in which nitrification and denitrification simultaneously proceed in a single reaction chamber is proposed for advanced municipal wastewater treatment. Anoxic/aerobic environments are alternatively created in the proposed MBR by inserting baffles inside the membrane chamber. The performance of the proposed baffled membrane bioreactor (BMBR) was examined at an existing municipal wastewater treatment facility based on long-term operation. Although the procedure was simple, insertion of the baffles actually created the alternative anoxic/aerobic environments in the chamber at a constant interval and showed a great improvement in the nutrient removal. The insertion did not cause any adverse effect on membrane permeability. In this study, almost complete elimination of NH4+-N was observed while around 8mg/L of NO3−-N was detected in the treated water. The modification proposed in this study can immediately be applied to most existing MBRs and is highly recommended for more efficient wastewater treatment.

scholarly journals Experimental Investigation of the Effect of Implanting TiO2-NPs on PVC for Long-Term UF Membrane Performance to Treat Refinery Wastewater

Membranes ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 77 ◽  
Author(s):  
Faris H. Al-Ani ◽  
Qusay F. Alsalhy ◽  
Rawia Subhi Raheem ◽  
Khalid T. Rashid ◽  
Alberto Figoli
Keyword(s):  
Fourier Transforms ◽  
Pure Water ◽  
Pvc Membrane ◽  
Refinery Wastewater ◽  
Oil And Grease ◽  
Tio2 Nps ◽  
X Ray ◽  
Term Operation ◽  
The Impact

This study investigated the impact of implanting TiO2-NPs within a membrane to minimize the influence of long-term operation on the membrane characteristics. Four poly vinyle chloride-titanium oxide (PVC-TiO2-NPs) membranes were prepared to create an ultrafiltration membrane (UF) that would effectively treat actual refinery wastewater. The hypothesis of this work was that TiO2-NPs would function as a hydrophilic modification of the PVC membrane and excellent self-cleaning material, which in turn would greatly extend the membrane’s lifetime. The membranes were characterized via Fourier transforms infrared spectroscopy (FTIR), X-ray diffraction (XRD), energy dispersive X-ray (EDX), atomic force microscope (AFM), and scanning electron microscope (SEM). The removal efficiency of turbidity, total suspended solid (TSS), oil and grease, heavy metals and chemical oxygen demand (COD) were investigated. Contact angle (CA) reduced by 12.7% and 27.5% on the top and bottom surfaces, respectively. The PVC membrane with TiO2-NPs had larger mean pore size on its surface and more holes with larger size inside the membrane structure. The addition of TiO2-NPs could remarkably enhance the antifouling property of the PVC membrane. The pure water permeability (PWP) of the membrane was enhanced by 95.3% with an increase of TiO2 to 1.5 gm/100gm. The PWP after backwashing was reduced from 22.3% for PVC to 10.1% with 1.5 gm TiO2-NPs. The long-term performance was improved from five days for PVC to 23 d with an increase in TiO2-NPs to 1.5 gm. The improvements of PVC-TiO2-NPs long-term were related to the enhancement of the hydrophilic character of the membrane and increase tensile strength due to the reinforcement effect of TiO2-NPs. These results clearly identify the impact of the TiO2-NPs content on the long-term PVC/TiO2-NPs performance and confirm our hypothesis that it is possible to use TiO2-NPs to effectively enhance the lifetime of membranes during their long-term operation.

Combined Cycle Equipment Standardization: How Much Is Too Much?

2005 ◽  
Author(s):  
Roger Fontes ◽  
Richard Casey ◽  
Robert Alder ◽  
Roger Prewitt
Keyword(s):  
Cost Effective ◽  
The United States ◽  
Combined Cycle ◽  
Lessons Learned ◽  
Term Operation ◽  
Power Stations ◽  
Cost Effective Approach ◽  
Maintenance Requirements ◽  
Original Equipment Manufacturers

Many electric utilities in the United States are involved with construction of both combined cycle and combustion turbine generation. These utilities and the industry, as a whole, have the opportunity to carefully examine methods of equipment optimization when developing these new power stations. The Florida Municipal Power Agency (FMPA) anticipates installing at least three large combined cycle units and several smaller aero-derivative combustion turbine units within the next 15 years. As a generation owner and operator, FMPA management is examining lessons learned by other utilities, original equipment manufacturers and consulting engineers to develop a cost-effective approach to equipment standardization. This evaluation focuses on design, equipment procurement, as well as long-term operation and maintenance requirements.

Acrylic wastewater treatment and long-term operation using a membrane separation system

Desalination ◽  
2006 ◽  
Vol 191 (1-3) ◽  
pp. 169-177 ◽  
Author(s):  
Kwang-Hyun Lee ◽  
Byung-Chul Kang ◽  
Jong-Baek Lee
Keyword(s):  
Wastewater Treatment ◽  
Membrane Separation ◽  
Separation System ◽  
Term Operation

scholarly journals Long-term operation of a novel electrically-enhanced biomass concentrator reactor for wastewater treatment

2018 ◽  
Vol 77 (8) ◽  
pp. 2036-2044 ◽  
Author(s):  
D. Cecconet ◽  
A. Callegari ◽  
A. G. Capodaglio
Keyword(s):  
Wastewater Treatment ◽  
Energy Efficient ◽  
Oxygen Demand ◽  
Urban Wastewater ◽  
Term Operation ◽  
Wide Range ◽  
Biomass Retention ◽  
Electrically Enhanced ◽  
Urban Wastewater Treatment

Abstract Membrane biological reactors (MBRs) are a key technology in wastewater treatment nowadays. However, due to their high construction cost and energetic requirements, alternatives based on the same principle of biomass retention have been designed and operated. Amongst these, biomass concentrator reactors (BCRs), using a coarser filter medium instead of a membrane, have shown to be able to remove a wide range of contaminants from wastewater and groundwater. A new BCR-derived technology enhanced with an electric field, called the electrically-enhanced biomass concentrator reactor (E2BCR), was designed and tested for urban wastewater treatment at different organic loads for a period of 180 days. The electrically-enhanced reactor showed better chemical oxygen demand (COD) removal performances than a non-enhanced control reactor (92.4% and 83.6% respectively) thanks also to electrocoagulation effects, and a lower fouling tendency, and proved to be more energy efficient in comparison with the control reactor in terms of energy consumption per mass of COD removed.

Innovations in the Design and Construction of a Modified UNITANK Wastewater Treatment Plant

2014 ◽  
Vol 955-959 ◽  
pp. 2310-2312
Author(s):  
Hai Liang Zheng ◽  
Zheng Xiao ◽  
Yao Wen Wu ◽  
Wei Jiang
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Large Scale ◽  
Treatment Plant ◽  
Term Operation ◽  
Pollutants Removal ◽  
Operation Results ◽  
Operation Cost ◽  
Design And Construction

Innovations in the design and construction of a large scale modified UNITANK wastewater treatment plant (WWTP) are introduced in this paper. Long term operation results indicate that the Qianfeng II WWTP shows good pollutants removal performance and reduces operation cost greatly by saving phosphorus removal chemicals, which demonstrates that these innovations are practical and could be popularized for the similar projects in the future.

Evaluation of a long-term operation of a submerged nanofiltration membrane bioreactor (NF MBR) for advanced wastewater treatment

2006 ◽  
Vol 53 (6) ◽  
pp. 131-136 ◽  
Author(s):  
J.-H. Choi ◽  
K. Fukushi ◽  
H.Y. Ng ◽  
K. Yamamoto
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Membrane Bioreactor ◽  
Nanofiltration Membrane ◽  
Treatment Efficiency ◽  
Water And Wastewater Treatment ◽  
Term Operation ◽  
Water And Wastewater ◽  
High Rejection

Nanofiltration (NF) is considered as one of the most promising separation technologies to obtain a very good-quality permeate in water and wastewater treatment. A submerged NF membrane bioreactor (NF MBR) using polyamide membranes was tested for a long-term operation and the performance of the NF MBR was compared with that of a microfiltration MBR (MF MBR). Total organic carbon (TOC) concentration in the permeate of the NF MBR ranged from 0.5 to 2.0 mg/L, whereas that of the MF MBR showed an average of 5 mg/L. This could be explained by the tightness of the NF membrane. Although the concentration of organic matter in the supernatant of the NF MBR was higher than that in the permeate due to high rejection by the NF membrane, the NF MBR showed excellent treatment efficiency and satisfactory operational stability for a long-term operation.

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