In this study, direct contact membrane distillation (DCMD) was used for treating fermentation wastewater with high organic concentrations. DCMD performance characteristics including permeate flux, permeate water quality as well as membrane fouling were investigated systematically. Experimental results showed that, after 12hr DCMD, the feed wastewater was concentrated by about a factor of 3.7 on...

Oil and gas field wastewater or produced water is a significant waste stream in the oil and gas industries. In this study, the performance of a membrane sequencing batch reactor (MSBR) and membrane sequencing batch reactor/reverse osmosis (MSBR/RO) process treating produced wastewater were investigated and compared. The MSBR was operated in different hydraulic residence time (HRT) of 8, 20 and ...

One of the most costly problems in the maintenance of heat exchangers is de-fouling, which results in a waste of time and money. The present study includes two parts: the first section addresses fouling factor, its disadvantages, and circumstance of formation, fouling types, and general models of the fouling. In the second part, the problem of fouling in oil exchanger and particular type of fou...

We present a versatile technique for fabricating polymersomes in glass-coated stamped microfluidic devices. We use templates comprised of double emulsions with a shell of block copolymers dissolved in organic solvents. The double emulsions direct the assembly of amphiphilic diblock copolymers into polymersomes during evaporation of the organic solvents. Our device consists of a single cross jun...

A major cause of ultrafiltration (UF) membrane fouling is the accumulation of microorganisms and their associated soluble products. To mitigate fouling the application of pulsed short-wavelength ultraviolet (UVC) light (around 254 nm) within the membrane tank together with pre-coagulation was investigated. In mini-pilot-scale tests carried out in parallel with conventional pre-treatment (CUF), ...

This paper provides a review on the fouling mechanism and its effect onto the performance of finned tube heat exchangers in HVAC systems. Fouling tends to degrade the performance of heat exchangers by decreasing the heat transfer coefficient and increasing the air-side pressure drop across the heat exchangers. Air side fouling depends on a number of factors on the air side, including type and c...

2016 © American Water Works Association JOURNAL AWWA OCTOBER 2016 | 108:10 Microfiltration (MF) membranes are low-pressure membranes that generally have pore sizes in the range of 1 to 0.1 μm. They can effectively reject bacteria, protozoa, and colloidal particles by size exclusion. The physical rejection of viruses and the dissolved fraction of natural organic matter (NOM) by MF (0.1 μm nomina...

The organic matter of rock phosphate has been the subject numerous studies. valuation and resolu-tion some problems, such as fouling, encountered in industrial production phosphoric acid are great interest, enable better yields acid. solid deposits formed wet process were characterized revealed malladrite, gypsum, trace metals, presence matter. identification was carried out fouling samples usi...

The combined fouling during ultrafiltration (UF) of surface water pretreated to different extents was investigated to disclose the roles of polysaccharides, proteins, and inorganic particles in UF membrane fouling. Both reversible and irreversible fouling decreased with enhanced pretreatment (biologically active carbon (BAC) treatment and sand filtration). The sand filter effluent fouled the me...