dye removal from effluents of textile industries of iran was investigated through biodegradabilitymethod and membrane technology . basic, reactive,disperse and acidic dyes were selected, based onusage rate in iran. the zahen - welenze method (iso 9888) was applied to study the biodegradabilityof dyes. results showed the final cod and dye removal (%r) as (%61,% 57), (%73, %76), (%25, %14),and (%...

Pada saat diatas kapal penyediaan air tawar sangat besar permesin bantu kapal. umumnya kebutuhan dipenuhi oleh supply dari darat, dan tentunya memerlukan biaya yang cukup untuk bunker waktu lama Kapal-kapal modern biasanya dilengkapi dengan pesawat atau alat dapat merubah laut menjadi tawar, inilah disebut Reverse Osmosis. Tujuan penelitian ini dibuat menganalisis permasalahan terjadi mencari t...

The rejection of cyclophosphamide (CP) by nanofiltration (NF) and reverse osmosis (RO) membranes from ultrapure (Milli-Q) water and membrane bioreactor (MBR) effluent was investigated. Lyophilization-extraction and detection methods were first developed for CP analysis in different water matrices. Experimental results showed that the RO membrane provided excellent rejection (>90%) under all ope...

In this report, experimental investigation of waste water treatment by reverse osmosis to enable its reuse in cooling tower is presented. A polyamide spiral wound RO membrane followed by three filters as RO pretreatment (two activated carbon and one cartridge filter) and samples of Tehran refinery treated waste water have been used. The effect of operating conditions such as pressure difference...

An osmotic membrane bioreactor-reverse osmosis (OMBR-RO) hybrid system integrated with periodic microfiltration (MF) extraction was evaluated for simultaneous phosphorus and clean water recovery from raw sewage. In this hybrid system, the forward osmosis membrane effectively retained inorganic salts and phosphate in the bioreactor, while the MF membrane periodically bled them out for phosphorus...

This paper reports the isolation of individual layers in a thin composite reverse osmosis membrane. Unlike previous studies where the active layer has always been isolated on top of a solid support, we were able to obtain layers of unsupported active layer. These layers were characterised for their thickness, water vapour sorption and salt transport properties.

In this paper, vertical scanning interferometry (VSI) and atomic force microscopy (AFM) were used to characterize the topography of several nanofiltration and reverse osmosis membrane surfaces. Comparing roughness results from the two different characterization techniques revealed u f o a m ©

Chemical force microscopy (CFM) was used to characterize the chemical heterogeneity of two commercially available nanofiltration and reverse osmosis membranes. CFM probes were modified with three different terminal functionalities: methyl (CH3), carboxyl (COOH), and hydroxyl (OH). Chemically distinct information about the membrane surfaces was deduced based on differences in adhesion between th...

Analysis of Fouling Resistances under Dynamic Filtration of Pretreated Olive Mill Wastewater on a Loose Reverse Osmosis Membrane Javier Miguel Ochando-Pulido, Marco Stoller, Antonio Martínez-Férez Chemical Engineering Department, University of Granada, Avda. Fuentnueva s/n, 18071 Granada, Spain b University of Rome “La Sapienza”, Department of Chemical Engineering, Via Eudossiana, 18-00184 Rome...