Shaw Environmental & Infrastructure, Inc. Patent applications |
Patent application number | Title | Published |
20150231560 | EMISSION CONTROL SYSTEM - Methods of treating mercury contaminated gas comprising: introducing a hydrogen halide selected from HBr and HI into a mercury contaminated gas stream containing a quantity of particulate matter at an introduction rate sufficient to create a concentration of at least 0.1 ppmvd; wherein greater than 50% of all particulate matter in the mercury contaminated gas stream is a native particulate matter; contacting a quantity of active bromine with the native particulate matter; creating a doped particulate matter; coating a filtration media with the doped particulate matter; and passing a portion of the mercury contaminated gas stream through the doped particulate matter on the filtration media and other related methods are disclosed herein. | 08-20-2015 |
20120195815 | EMISSION CONTROL SYSTEM - Methods of treating mercury contaminated gas comprising: introducing a hydrogen halide selected from HBr and HI into a mercury contaminated gas stream containing a quantity of particulate matter at an introduction rate sufficient to create a concentration of at least 0.1 ppmvd; wherein greater than 50% of all particulate matter in the mercury contaminated gas stream is a native particulate matter; contacting a quantity of active bromine with the native particulate matter; creating a doped particulate matter; coating a filtration media with the doped particulate matter; and passing a portion of the mercury contaminated gas stream through the doped particulate matter on the filtration media and other related methods are disclosed herein. | 08-02-2012 |
20090130742 | VESSEL AND SYSTEM FOR BIOLOGICAL REGENERATION OF ION EXCHANGE AND ABSORPTIVE MEDIA - A system and method for biological regeneration of ion exchange and absorptive media including a vessel configured to contain a bed of contaminated media particles. The vessel includes a first region configured to receive biological regenerating fluid for contacting media particles in the first region at a first volumetric flowrate sufficient to produce a shear force high enough to reduce bio-film thickness on the media particles; a second region configured to receive a portion of biological regenerating fluid from the first region, wherein the portion of biological regenerating fluid in said second region has a second volumetric flowrate lower than the first volumetric flowrate; and a third region configured to receive another portion of biological regenerating fluid from the first region, wherein the another portion of biological regenerating fluid in the third region has a third volumetric flowrate lower than the second volumetric flowrate. | 05-21-2009 |
20080223783 | HIGH PERFORMANCE, ENERGY EFFICIENT SYSTEM AND METHOD FOR WASTEWATER TREATMENT WITH RESOURCE RECOVERY AND REDUCED RESIDUAL SOLIDS GENERATION - A wastewater treatment system is provided including an aerobic membrane bioreactor and an anaerobic digester system connected to receive wasted solids continuously from the aerobic membrane bioreactor and also connected to return effluent from the anaerobic digester system continuously to the aerobic membrane bioreactor. Further, a process is provided for treating wastewater including the step of wasting a volume fraction of organic cell mass from an aerobic membrane bioreactor to an anaerobic digester system and maintaining a solids retention time (SRT) in the bioreactor that is (1) greater than a time needed to achieve growth of organisms suitable for converting carbonaceous biochemical oxygen demand (CBOD) into cell mass and (2) less than a time at which substantial decay of the organisms occurs. The system and process may further include optional pretreatment and/or phosphorus and/or nitrogen removal downstream of the membrane bioreactor system. | 09-18-2008 |