Paper Information

Journal:   WATER AND WASTEWATER   2011 , Volume 22 , Number 1 (77); Page(s) 42 To 48.
 
Paper:  ORGANIC REMOVAL EFFICIENCY OF THE NANOFILTRATION AND ADSORPTION HYBRID SYSTEM IN HIGH STRENGTH WASTEWATER
 
Author(s):  HASSANI AMIR HESSAM, SALEHI SIAVASHANI BAHARE, BORGHEI MEHDI, SALEHI SIAVASHANI BEHNAZ*
 
* ISLAMIC AZAD UNIVERSITY, SCIENCE AND RESEARCH BRANCH , TEHRAN
 
Abstract: 

Surface and groundwater resources are increasingly jeopardized by discharges from pharmaceutical, chemical, and detergent plants. The high pollutant load of the effluents from these industries requires specific treatments.
The objective of this research was to study and compare the nanofiltration and adsorption hybrid system with the plain nanofiltration system in wastewater treatment. For this purpose, a pilot nanofiltration system with a capacity of 7.6 m3/d using 1 and 5 micron filters and a FILMTEC NF90-4040 membrane was used in the first phase of the study. In the second phase, granular activated carbon cartridges were used. Inluent and effluent discharges as well as the COD removal were measured in both systems under variable times and organic load conditions. The results showed that COD removal efficiency was higher in the hybrid system than in the plain naonofiltration one. In the hybrid system, the Maximum in the hybrid system, the COD removal efficiencies achieved for organic loads of 1000, 2000, and 3000 mg/L were 99%, 95.86%, and 92.93%, respectively. The same values for the plain nanofiltration system were 87.34%, 50%, and 29.41%, respectively. It was found that polarization and membrane fouling decreased both the effluent flow and the COD removal efficiency with time. Fouling of the membrane was, however, lower in the hybrid system compared to the plain nanofiltration; thus, the hybrid system was associated with higher values of COD removal and delayed membrane fouling.

 
Keyword(s): NANOFILTRATION, ACTIVATED CARBON, FLOW REFLUX, POLARIZATION, EFFICIENCY
 
References: 
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