Water Environment Federation (WEF) Discussion ForumsWater Environment Federation (WEF) Discussion Forumshttp://www.wef.org/TechnicalDiscussions/jfuller@wef.orgMon, 08 Sep 2008 02:48:59 GMT20http://www.wef.org/TechnicalDiscussions/Topic8016-19-1.aspxA little late, but two more publications that may be of interest...</P><P>TR-16, "Guides for the Design of Wastewater Treatment Works," prepared by the New England Interstate Water Pollution Control Commission. Available by accessing their web site, neiwpcc.org.</P><P>"Domestic Wastewater Facilities Manual" (362-0300-001) - Pennsylvania DEP. Report is available online by googling the title and number.</P><P>Grant WeaverMon, 25 Aug 2008 09:27:02 GMTWaterPlanethttp://www.wef.org/TechnicalDiscussions/Topic8016-19-1.aspxFor the most part redundancy is to prevent the discharge of untreated wastewater. So, if you have a clarifier go down your back up will save the day. That is a State requirement. You must treat the incoming wastewater with existing equipment you have. You could be using all your clarifiers but if one goes down you must still be able to treat the waste.Fri, 08 Feb 2008 11:12:58 GMTBill Hhttp://www.wef.org/TechnicalDiscussions/Topic8016-19-1.aspxYes thanks, the WERF report directed us to the Ten States Standards. Currently 2004 edition and is now $12. </P><P>The WERF report was a bit disappointing as it was a survey of current practice. No framework</P><P>The USEPA Report is 1974, so I don't think it would be that useful - back in those days governments were putting lots of money into cleaning up wastewater. There used to be plenty of redundancy and instrumentation was totally different.Fri, 08 Feb 2008 06:28:31 GMTGrant Hhttp://www.wef.org/TechnicalDiscussions/Topic8016-19-1.aspxAnother reference that you may find useful is the "Recommended Standards for Wastewater Facilities", which is put together by the Great Lakes-Upper Mississippi River Board of State and Provincial Public Health and Environmental Managers (whew ! That's a mouthful). It's usually referred to as "Ten -States" standards, due to its origins (Illinois, Indiana, Iowa, Michigan,Minnesota,Missouri, New York, Ohio, Pennsylvania, and Wisconsin), but now also includes Ontario. In N.Y., it can be bought from the Health Education Services, which acts sort of like a government printing office. I assume it is similarly available in the other states, and guess that the cost is about $10. Can probably find out more details on-line.Fri, 25 Jan 2008 19:03:06 GMTJohn Sansalonehttp://www.wef.org/TechnicalDiscussions/Topic8016-19-1.aspxYou might want to get the following design manual from WEF:<br><br>Design of Municipal Wastewater Treatment Plants - MOP 8, 4th Edition<br><br>My much older (1977) version is very straightforward regarding all of the important aspects in sewage plant design, including the need for backup equipment. I assume that the current version is equally helpful.Fri, 25 Jan 2008 12:30:01 GMTJeff Naumannhttp://www.wef.org/TechnicalDiscussions/Topic8016-19-1.aspxThe US EPA and a number of US states publish documents with general guiding principles regarding reliability , redundancy and emergency capacity. If you apply the principles , use a sensible risk management approach , and talk to some smart and experienced operators and maintenance personnel then you will probably get the result you want.</P><P>Process flexibility helps.</P><P>Regards</P><P>TerryFThu, 24 Jan 2008 17:39:44 GMTTerryFhttp://www.wef.org/TechnicalDiscussions/Topic8016-19-1.aspxYes redundancy includes all TP equipment, from tanks, pumps and pipework, PLC, instrumentation and control equipment.</P><P>Obviously each item has different redundancy requirements (e.g. flow treatment equipment must be sized for PWWF, whilst sludge pumps need redundancy but operate at one loading).Thu, 24 Jan 2008 07:36:15 GMT01780898http://www.wef.org/TechnicalDiscussions/Topic8016-19-1.aspxDoes "equipment" include treatment tankage?Fri, 18 Jan 2008 12:57:59 GMTD Shulmisterhttp://www.wef.org/TechnicalDiscussions/Topic8016-19-1.aspxCan anyone suggest relevant documents/standards on the equipment availability, reliability and thus redundancy for large wastewater treatment plants (1 million ep).</P><P>I have found the WERF report and the SMRP. Are there any other protocols or recent emperical standards?</P><P>Thank you</P><P>Grant H, AustraliaThu, 17 Jan 2008 00:10:30 GMT01780898