公开(公告)号：US20180009687A1

公开(公告)日：2018-01-11

申请号：US15630648

申请日：2017-06-22

申请人： Sudhir N. Murthy ,  Haydee De Clippeleir ,  Christine Debarbadillo ,  Charles B. Bott ,  Stephanie Klaus ,  Bernhard Wett

发明人： Sudhir N. Murthy ,  Haydee De Clippeleir ,  Christine Debarbadillo ,  Charles B. Bott ,  Stephanie Klaus ,  Bernhard Wett

IPC分类号： C02F3/30 ,  C02F3/00

CPC分类号： C02F3/305 ,  C02F3/006 ,  C02F3/307 ,  C02F2209/006 ,  C02F2209/14 ,  C02F2209/15 ,  C02F2209/40 ,  C02F2209/44 ,  Y02E50/343

摘要： This disclosure relates to nitrogen removal with carbon addition, including for wastewater treatment. The denitrification reaction may be terminated at an intermediate nitrite product which is supplied to the anammox reaction. Nitrogen may be removed by use of an electron donor source including, but not limited to, acetate or glycerol at a specific zone. The electron donor may be used to convert nitrate to nitrite through appropriate dosing, anoxic SRT and/or maintenance of a nitrate residual in isolation or in combination. The subsequent supply of nitrite and ammonia for anammox reactions is also proposed. The slower growing anammox may be selectively retained on media or using other physical approaches. The overall intent of the present disclosure is to minimize the use of electron donor by maximizing denitratation and anammox reactions. Test results for selective retention of anammox in biofilm, granular or suspended growth system or nitrate residual control are provided.

公开(公告)号：US20190263696A1

公开(公告)日：2019-08-29

申请号：US16285146

申请日：2019-02-25

申请人： Bernhard Wett ,  Sudhir N. Murthy ,  Hampton Roads Sanitation District ,  D.C. Water and Sewer Authority

发明人： Charles B. Bott ,  Haydee De Clippeleir ,  Bernhard Wett ,  Christine deBarbadillo ,  Sudhir N. Murthy ,  Jessica Edwards-Brandt

IPC分类号： C02F9/00

摘要： An apparatus and a method for removing constituents from an influent. The apparatus includes a biological processor that receives a water mixture as influent and outputs a liquor, a solid-liquid separator that receives the liquor and separates the liquor into a liquid and a solid; and a biofilm media that includes at least one media surface. The biofilm media may have a biofilm mass, biofilm volume, biofilm density, biofilm thickness, hydraulic retention time or solids residence time. The at least one media surface grows a biofilm that removes one or more constituents contained in the influent. The biofilm mass, biofilm volume, biofilm density, biofilm thickness, hydraulic retention time or solids residence time can be controlled by at least one of a physical process, a biological process or a chemical process.