Coos Bay Wastewater Treatment Plant #2 Preliminary Design
Coos Bay Wastewater Treatment Plant #2 Preliminary Design
Source: https://www.coosbayor.gov
Prepared By: Craig Massie
The purpose of this technical memorandum (TM) is to provide the City of Coos Bay an overview of the predesign report and a summary of some of its content. The predesign engineering for this project includes the design development of the City’s new wastewater treatment plant adjacent to the existing Wastewater Treatment Plant 2. The new plant will consist of an influent pump station, headworks screening and grit removal facility, sequencing batch reactor activated sludge process and ultraviolet disinfection prior to discharging to Coos Bay through an existing outfall pipe and diffuser.
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The content of this technical sheet on “aerated ponds” is based primarily on the following publications:
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Oily wastewaters and Oil–in-water emulsions are two of the major pollutants of the environment. Ultrafiltration (UF) membranes play an important role in the treatment and reuse of oily wastewaters. Fouling of UF membranes is typically caused by inorganic and organic materials present in wastewaters that adhere to the surface and pores of the membrane and result in the deterioration of performance with a consequent increase in energy costs and membrane replacement. In the experiments, polyacrylonitrile (PAN) and outlet wastewater of the API (American Petroleum Institute) separator unit of Tehran refinery as membrane and feed were used, respectively. Fouling and cleaning experiments were performed with oily wastewater and selected cleaning agents using a laboratory scale cross flow test unit. The results showed that metal chelating agent (ethylene diamine tetra acetic acid disodium salt-2-hydrate (EDTA)) and an anionic surfactant (sodium dodecyl sulfate (SDS)) were able to Clean the fouled UF membrane effectively by optimizing chemical (pH) and physical
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