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Chemical Engineering Journal

4.0 ± 0.2Lm −2 h 1, and the TMP of the membrane module sub- merged in the reactor was monitored constantly to indicate the extent of membrane fouling. According to the resistance-in-series (RIS .

Fouling in Refineries | ScienceDirect

Abstract. Fouling in crude oil refineries affects the operation of crude oil predistillation heat exchanger trains. Although petroleum fouling has been the subject of study for decades, there is a lack of fundamental understanding of the chemical transformations leading to fouling.

Air purification in chemical and biological warfare .

Chemical and biological warfare materials create difficulties when designing or retrofitting high value targets such as buildings to withstand terrorist attack. The gas-phase corona reactor (GPCR) is a synergistic combination of plasma (or ionized gas) and catalyst .

COMPARISON OF BATCH VERSUS CONTINUOUS PROCESS IN .

ABSTRACT As opposed to the petro-chemical and bulk chemical industry, where continuous processes are widely applied, the pharmaceutical industry still primarily relies on traditional batch process due to the complexity of product, multi-step operation and low-volume production.

Physical and economical evaluation of laboratory-scale .

Including all these approaches, physical cleaning methods, chemical cleaning methods (use of various cleaning agents, such as NaOCl, acids, etc.), physico-chemical methods (combination of aforementioned two) and biological methods (cleaning mixtures based on microbial cultures or enzymes) (Cinar et al. 2016), an introduction of new fouling .

Biomass Characteristics and Their Effect on Membrane .

Scopus (abstract and citation database of peer reviewed literature) [2]. Several membrane fouling mechanisms have been proposed, including pore clogging, gel layer formation, cake layer formation and osmotic pressure effect (Figure 2). During the complete pore clogging, it is assumed that each particle reaching the membrane blocks a pore without

Anthony Dixon | Engineering at Alberta

Department of Chemical Engineering, Worcester Polytechnic Institute "Selective oxidation in fixed bed reactors - insights from CFD simulations" Abstract: Fixed-bed reactors are widely used for large-scale, heterogeneously-catalyzed gas-phase reactions, such as selective hydrogenations and partial oxidations.

Model of Radiation Transmittance by Inorganic Fouling on .

Inorganic Fouling on UV Reactor Lamp Sleeves Isaac W. Wait1*, Ernest R. Blatchley III2 ABSTRACT: The efficacy of UV disinfection of water depends on the ability of radiation to pass from UV lamps through the quartz sleeves that encase them; the accumulation of metal-containing foulants on sleeve

Vinoj KURIAN | Postdoctoral Researcher | Chemical .

A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text.

Experimental Investigation of the Effects of Coagulant .

Permeate Flux on Membrane Fouling in a Moving Bed Biofilm Reactor - Membrane Process . to the University of Waterloo in fulfillment of the thesis requirement for the degree of Master of Applied Science in Chemical Engineering Waterloo, Ontario, Canada, 2012 . Abstract The application of membrane bioreactors (MBRs) to wastewater treatment is .

Membrane biofouling in a wastewater nitrification reactor .

During a 14-day fouling event, three phases were determined according to the flux decline and microbial succession patterns. In Phase I (0-2 days), small sludge flocs in the bulk liquid were selectively attached on membrane surfaces, leading to the formation of similar EPS and microbial community composition as the early biofilms.

Continuous production of iron oxide nanoparticles via fast .

In this flow reactor residence times of less than 10 min were shown to be sufficient to synthesise monodisperse IONPs of 5–7 nm and achieve precursor conversion between 10–70% depending on the reaction temperature. For all synthesis conditions tested, there was no indication of reactor fouling.

Mechanism of Fouling in Slurry Polymerization Reactors of .

Aug 19, 2016 · Slurry polymerization processes are used to produce high-density polyethylene of tailor-made properties. The formation of fouling in slurry reactors as well as in its peripheral equipment, such as external heat exchangers, is attributed either to the deposition of oligomers (wax) or to the buildup of electrical charge in small polymer particles.

Chemical Engineering Journal

4.0 ± 0.2Lm −2 h 1, and the TMP of the membrane module sub- merged in the reactor was monitored constantly to indicate the extent of membrane fouling. According to the resistance-in-series (RIS .

Enhanced treatment of composite industrial wastewater .

The recommended conditions for both chemical oxygen demand (COD) and nitrogen removal were as follows: hydraulic retention time of 73.6 h, sludge retention time of 35 days and mixed liquor return ratio of 300%. Under this condition, COD and total nitrogen removal .

The MBR Site | O&M − MBR fouling, clogging and cleaning

Membrane cleaning can be by physical or chemical means, and both are employed in MBR operation and maintenance. Physical cleaning is normally achieved either by 'backflushing', i.e. reversing the flow back through the membrane, or 'relaxation', which is simply ceasing permeation while continuing to scour the membrane with air bubbles (for an immersed process) or the crossflow (for a .

Research Paper BUBBLE COLUMN REACTOR-A .

1)Associate Professor, Department of Chemical Engineering, Rural Engineering College, Bhalki, Bidar District-585328, Karnataka, India 2)43, Judges Bagan,Post Office-Haridevpur, Kolkata-700082,India ABSTRACT Bubble column reactors are extensively used as multiphase flow reactors and reactors in chemical, biochemical and petrochemical industries.

[Effect of Membrane Wettability on Membrane Fouling and .

Abstract Shirasu porous glass (SPG) membranes have been applied for microbubble aeration in aerobic wastewater treatment. In the present study, both hydrophilic and hydrophobic SPG membranes were used in a microbubble-aerated biofilm reactor with online chemical cleaning, and their membrane fouling and chemical durability were determined to be .

Performance and membrane fouling characteristics of a .

Treatment performance and membrane fouling characteristics were investigated. The concentrations of chemical oxygen demand (COD),, and total nitrogen (TN) in effluent were 447, 27, 14 and 114 mg L −1, corresponding to the removal rates of 89%, 76%, 68% and 64%, respectively. A series of analyses, including Fourier transform infrared .

Asphaltene Aggregation and Fouling Behavior

Abstract This thesis explored the properties of asphaltene nano-aggregates in crude oil and toluene based solutions and fouling at process furnace temperatures, and the links between these two phenomena. The link between stability of asphaltenes at ambient conditions and fouling at the conditions of a delayed coker furnace, at

Identification of the change in fouling potential of .

This study focused on the effect of predated sludge recycle on the fouling potential of soluble microbial products (SMP) in the MBR coupled with Static Sequencing Batch Worm Reactor (SSBWR-MBR). The S-SMP (SMP in SSBWR-MBR) filtration showed slower diminishing rate of flux than C-SMP (SMP in Control-MBR) filtration, and the standard blocking model showed the most excellent fit (R2=0.9999) for.

Numerical study of crude oil fouling in a Taylor-Couette .

We consider the non-isothermal flow of crude-oil mixtures in a Taylor-Couette-type reactor; this flow is accompanied by the deposition of soft-solid wall-layers, commonly referred to as ``fouling'', driven by chemical reactions and phase separation. Three-dimensional CFD simulations are carried out to resolve the flow and temperature fields, as well as the volume fraction of the foulant phase.

Study of Fouling Phenomena in Apple Juice Clarification by .

(1998). Study of Fouling Phenomena in Apple Juice Clarification by Enzyme Membrane Reactor. Separation Science and Technology: Vol. 33, No. 5, pp. 739-756.

CiteSeerX — INORGANIC FOULING AT QUARTZ:WATER .

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Abstract—Fouling of quartz jackets around mercury arc lamps represents a performance limitation in photochemical reactors used in treatment of aqueous streams, such as those used in disinfection, photo-catalysis and UV-based advanced oxidation processes. These fouling materials are generally comprised of inorganic .

Mohamed Gamal El-Din, PhD, PEng - [email protected]

CIV E 622 - Physical/Chemical Water and Wastewater Treatment. Theory and design of chemical and physical unit processes utilized in the treatment of water and wastewater, sedimentation, flotation, coagulation, precipitation, filtration, disinfection, ion exchange, reverse osmosis, adsorption, and gas transfer. Fall Term 2020

NIOSHTIC-2 Publications Search - 00169327 - The prevention .

Elimination of reactor fouling was achieved by developing reactor cleaning technology based on the introduction of high pressure water jets, using nozzles inserted into the reactor. Removal of the buildup was successfully achieved by developing a simple and effective commercial system consisting of a chemical feed tank, a pump and a feed nozzle .

Chylla-Haase reactor Related Abstracts

Authors: Magdi M. Nabi, Ding-Li Yu Abstract: This paper presents a neural network based model predictive control (MPC) strategy to control a strongly exothermic reaction with complicated nonlinear kinetics given by Chylla-Haase polymerization reactor that requires a very precise temperature control to maintain product uniformity.

Electrochemical disinfection of drinking water using an .

An electrochemical reactor employing activated carbon fibers (ACF) was constructed for the disinfection of bacteria in drinking water. The application of an alternating potential of 1.0 V and -0.8 V versus a saturated calomel electrode, for disinfecting and desorbing bacteria, enabled reactor operation for 840 h.

Patents Assigned to Chevron Phillips Chemical Company .

Abstract: Disclosed herein are systems and processes which prevent fouling of a reactor inlet of an oligomerization reactor. The systems and processes involve placement of an inlet sleeve around at least a portion of a reactor inlet such that a curtain of inert material flows through an annular space coaxially with respect to an outer surface of the end of the reactor inlet and into the reactor.

Neoteric approach for mitigation of fouling in membrane .

Jul 14, 2020 · Purification of water is a critical and inevitable process at present to avoid the harmful effect of polluted water and to meet the need for safe drinking water to millions of people in the world. Several methods of water purification exist, but the combination of adsorption and filtration is found to beparamount in the water treatment process owing to the cost-effectiveness and efficacy .