Extending Tertiary Treated Municipal Wastewater as Boiler Feed-Water via a Dual Membrane CUF/RO Process

Hai Xia Wang; Peng Ji

doi:10.4028/www.scientific.net/AMR.726-731.2476

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 726-731Extending Tertiary Treated Municipal Wastewater as...

Extending Tertiary Treated Municipal Wastewater as Boiler Feed-Water via a Dual Membrane CUF/RO Process

Abstract:

The objective of this work is to conduct feasibility studies on water treatment for boiler feeding water use from treated municipal wastewater effluent using a pilot dual continuous ultrafiltration - reverse osmosis (CUF/RO) membrane process with the capacity of 15m³/h. A CUF membrane from HYDRAcap and LFC3-LD RO membrane were used in this study. The CUF unit and RO unit were operated at over 97% and 75-80% water recovery, respectively. The results indicate that CUF process is not only capable of reducing organic and nutrient pollutants but also achieves a silt density index (SDI) less than 2, turbidity of less than 0.47NTU which is suitable for RO treatment. Rejection of the RO unit in terms of average conductivity, COD, hardness, alkaline, NH₄⁺-N, TN, TP were higher than 98.2%, 97.9%, 99.8%, 97.9%, 93.9%, 95.1% and 75%, respectively. Other parameters also can match the quality of high-grade water for use in the boiler industry except pH. Finally, a cost comparison between dual membrane and ion-exchange process showed annual savings of more than 33000000 CNY can be possible.

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Periodical:

Advanced Materials Research (Volumes 726-731)

Pages:

2476-2482

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.726-731.2476

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Online since:

August 2013

Authors:

Hai Xia Wang, Peng Ji

Keywords:

Boiler Feeding Water, Continuous Ultrafiltration, Reclamation, Reverse Osmosis, Sewage Effluent

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