公开(公告)号：US11725148B2

公开(公告)日：2023-08-15

申请号：US17560884

申请日：2021-12-23

申请人： Graymont Western Canada Inc.

发明人： Nikolas Andrei Romaniuk ,  Michael John Tate ,  Jared Ira Leikam ,  Jesse Wayne Fox ,  Narain Hariharan

IPC分类号： C10G1/04 ,  C04B18/04 ,  C02F11/145 ,  C04B18/12 ,  C02F103/10

CPC分类号： C10G1/045 ,  C02F11/145 ,  C04B18/049 ,  C04B18/12 ,  C02F2103/10 ,  C02F2209/06 ,  C10G2300/1003 ,  C10G2300/80

摘要： Methods and systems for calcining dewatered tailings and/or mine waste are disclosed herein. In some embodiments, the method comprises (i) processing dewatered tailings comprising clay minerals, (ii) calcining the processed tailings to produced calcined tailings, and (iii) altering a composition and/or one or more characteristics of the calcined tailings to produce a cementitious product. Altering the composition can include blending the calcined tailings with one or more additives, such as lime, dolomitic lime, lime kiln dust, argillaceous limestone, limestone, pulverized quicklime, ground calcium carbonate, quicklime, gypsum, natural pozzolans, artificial pozzolans, water, flow aids, or the like.

公开(公告)号：US11414335B2

公开(公告)日：2022-08-16

申请号：US17308365

申请日：2021-05-05

申请人： Graymont Western Canada Inc.

发明人： Nikolas Andrei Romaniuk ,  Michael John Tate ,  Narain Hariharan

IPC分类号： C02F11/145 ,  B09C1/08 ,  C02F1/52 ,  C02F1/66 ,  C10G1/04 ,  B01D21/01 ,  C02F1/10 ,  C02F103/10

摘要： Methods and systems for reducing greenhouse gas emissions from sediments containing organic materials via treatment with lime are disclosed herein. In some embodiments, the method comprises (i) providing sediments comprising a first pH less than 10.0, fermentable organic materials, and microbes configured to produce carbon dioxide and/or methane via degradation of the organic material; (ii) adding a coagulant comprising lime to the sediment to produce a mixture comprising a second pH of at least 11.0 and excess soluble calcium ions; and (iii) after adding the coagulant, forming a buffer comprising soluble sodium and calcium bicarbonates within the mixture by enabling the excess soluble sodium and calcium ions to react with carbon dioxide. Forming the buffer can comprise decreasing the pH of the mixture from the second pH to a third pH of 8.0 or greater.

公开(公告)号：US20210032132A1

公开(公告)日：2021-02-04

申请号：US16944673

申请日：2020-07-31

申请人： GLOBAL ENVIRONMENTAL GROUP INC.

发明人： William Paul

IPC分类号： C02F1/52 ,  C02F1/66 ,  C02F11/145 ,  C04B7/44

摘要： A wastewater treatment system, including a wastewater phase-separation device, may be used to combine at least one primary treatment chemical and wastewater to produce cleaned water and a sludge byproduct. The wastewater treatment system may also include a wastewater dewatering device that may be used to combine the sludge byproduct and at least one secondary treatment chemical to produce a Medium to High Solids Content Sludge without excess water. A method for producing sludge for cement manufacturing may include combining wastewater and at least one primary treatment chemical to form a liquid phase and a solid phase, where the liquid phase includes clean water and the solid phase includes a sludge byproduct, separating the liquid phase from the solid phase, combining the solid phase with at least one secondary treatment chemical to form an intermediate that contains excess water, and removing the excess water from the intermediate to form a Medium to High Solids Content Sludge.

公开(公告)号：US10894730B2

公开(公告)日：2021-01-19

申请号：US16566578

申请日：2019-09-10

申请人： Graymont Western Canada Inc.

发明人： Jared Ira Leikam ,  Nikolas Andrei Romaniuk ,  Jesse Wayne Fox ,  Michael John Tate ,  Narain Hariharan

IPC分类号： C02F1/52 ,  F26B5/00 ,  C02F11/145 ,  C10G1/04 ,  B01D21/30 ,  C02F11/12 ,  B65G5/00 ,  B09B1/00 ,  B01D21/01 ,  C02F11/148 ,  E21B21/06 ,  E21B43/34 ,  C02F103/10 ,  C02F1/56

摘要： Methods and systems for treating tailings at an elevated pH using lime are disclosed herein. In some embodiments, the method comprises (i) providing a tailings stream comprising bicarbonates and a pH less than 9.0, (ii) adding a coagulant comprising calcium hydroxide to the tailings stream to form a mixture having a pH of at least 11.5 and a soluble calcium level no more than 800 mg/L, and (iii) dewatering the mixture to produce a product having a solids content of at least 40% by weight. In some embodiments, the pH and soluble calcium level of the mixture cause chemical modification of clay materials of the mixture via pozzolanic reactions. In some embodiments, the undrained shear strength of the product increases over a period of time of at least two days.

公开(公告)号：US20200239349A1

公开(公告)日：2020-07-30

申请号：US16840052

申请日：2020-04-03

申请人： Graymont Western Canada Inc.

发明人： Michael John Tate ,  Jared Ira Leikam ,  Jesse Wayne Fox ,  Nikolas Andrei Romaniuk

IPC分类号： C02F11/14 ,  C02F11/121 ,  C02F11/145 ,  C02F11/127 ,  C02F11/122 ,  C02F1/52

摘要： Methods and systems for treating oil sands tailings streams at an elevated pH using lime are disclosed herein. In some embodiments, the method comprises providing a tailings stream including 10-55% solids by total weight, increasing the pH of the tailings stream by combining the tailings stream with lime to produce a lime-tailings mixture having a pH of at least 11.0, and dewatering the lime-tailings mixture to produce a first stream having 10% or less solids by total weight and a second stream having 50% or more solids by total weight. The first stream can correspond to a release water stream, and the second stream can correspond to a cake. The lime slurry can include about 10% lime by total weight, and can comprise lime hydrate, quicklime, or a combination thereof. Dewatering the lime-tailings mixture can include routing the lime-tailings mixture to a centrifuge unit and/or a pressure or vacuum filtration unit.

公开(公告)号：US20240336511A1

公开(公告)日：2024-10-10

申请号：US18586779

申请日：2024-02-26

申请人： UOP LLC

发明人： Erick J. Bennett, III ,  William J. Whyman ,  Elizabeth Jensen ,  Aric G. Fisher ,  Gregory B. Kuzmanich

IPC分类号： C02F11/08 ,  C02F1/52 ,  C02F1/66 ,  C02F1/72 ,  C02F11/145 ,  C02F101/30 ,  C02F101/36 ,  C02F103/00 ,  C02F103/38 ,  C02F103/40

CPC分类号： C02F11/08 ,  C02F1/5236 ,  C02F1/66 ,  C02F1/72 ,  C02F11/145 ,  C02F2101/301 ,  C02F2101/306 ,  C02F2101/36 ,  C02F2103/006 ,  C02F2103/38 ,  C02F2103/40 ,  C02F2201/002 ,  C02F2209/02

摘要： Processes and apparatuses converting poly- and perfluoroalkyl substances (PFAS). An oxidation reaction zone, preferably a thermal oxidizer, is used to oxidize the PFAS into fluoride species. A reaction zone having at least one reactor containing a solid reactant for neutralizing the fluoride species is provided. The solid reactant is also configured to degrade any PFAS remaining in the effluent from the oxidation zone. A cooling zone, for example, a quench zone may be between the reaction zone and the oxidation zone. The PFAS may be liquid PFAS that is injected into the thermal oxidizer.

公开(公告)号：US11718543B2

公开(公告)日：2023-08-08

申请号：US17124089

申请日：2020-12-16

申请人： Graymont Western Canada Inc.

发明人： Nikolas Andrei Romaniuk ,  Jared Ira Leikam ,  Jesse Wayne Fox ,  Michael John Tate ,  Narain Hariharan

IPC分类号： C02F1/56 ,  B01D21/30 ,  C02F1/52 ,  C02F11/12 ,  C02F11/145 ,  C10G1/04 ,  F26B5/00 ,  B09B1/00 ,  B65G5/00 ,  C02F11/148 ,  C02F103/10 ,  E21B21/06 ,  E21B43/34 ,  B01D21/01

CPC分类号： C02F1/56 ,  B01D21/30 ,  C02F1/5245 ,  C02F11/12 ,  C02F11/145 ,  C10G1/045 ,  F26B5/005 ,  B01D21/01 ,  B09B1/00 ,  B65G5/00 ,  C02F1/5281 ,  C02F11/148 ,  C02F2103/10 ,  C02F2201/002 ,  E21B21/068 ,  E21B43/34

摘要： Methods and systems for treating tailings at an elevated pH using lime are disclosed herein. In some embodiments, the method comprises (i) providing a tailings stream comprising bicarbonates and a pH less than 9.0, (ii) adding a coagulant comprising calcium hydroxide to the tailings stream to form a mixture having a pH of at least 11.5 and a soluble calcium level no more than 800 mg/L, and (iii) dewatering the mixture to produce a product having a solids content of at least 40% by weight. In some embodiments, the pH and soluble calcium level of the mixture cause chemical modification of clay materials of the mixture via pozzolanic reactions. In some embodiments, the undrained shear strength of the product increases over a period of time of at least two days.

公开(公告)号：US20220323932A1

公开(公告)日：2022-10-13

申请号：US17845048

申请日：2022-06-21

申请人： Jiangnan University

发明人： Shuo WANG ,  Qixin LIU ,  Fei SHEN ,  Ji LI ,  Yong WANG ,  Xuesong YI

IPC分类号： B01J20/24 ,  B01J20/28 ,  B01J20/30 ,  C02F1/28 ,  C02F11/145 ,  C02F11/13 ,  C02F11/06

摘要： The present disclosure discloses a cellulose nanocrystal-supported sodium alginate adsorbent and use thereof in enriching organic phosphorus in wastewater, belonging to the technical field of environmental engineering. Cellulose nanocrystals are prepared from papermaking deinking sludge through chemical conditioning, drying, crushing, chemical oxidation and microwave assisted separation, and then supported on alginate under weakly acidic conditions to provide the cellulose nanocrystals with the ability to enrich organic phosphorus in wastewater. By using this method, the content of organic phosphorus in the wastewater can be significantly reduced, the total phosphorus in the effluent can be reduced, and the wastewater treatment effluent can satisfy the discharge standard. The enriched organic phosphorus can be recycled as a phosphorus resource through incineration. In addition, the papermaking deinking sludge is made into the product with a high added value, so the applicability of the papermaking deinking sludge is broadened. The present disclosure has high feasibility.

公开(公告)号：US11339071B2

公开(公告)日：2022-05-24

申请号：US16403127

申请日：2019-05-03

申请人： RDP TECHNOLOGIES, INC.

发明人： Richard W. Christy

IPC分类号： C02F9/00 ,  C02F11/02 ,  C02F11/127 ,  C02F3/12 ,  C02F11/145 ,  C02F11/18

摘要： An apparatus, method and system is provided for treating sewage sludge by dewatering the sewage sludge, heating the sewage sludge being treated to destroy pathogens, and then reducing volatile solids in the sewage sludge being treated through biochemical decomposition to produce a treated biosolids product that meets government regulations for pathogen reduction and vector attraction reduction.

公开(公告)号：US20220135460A1

公开(公告)日：2022-05-05

申请号：US17517277

申请日：2021-11-02

申请人： RDP TECHNOLOGIES, INC.

发明人： RICHARD W. CHRISTY

IPC分类号： C02F11/145 ,  C02F11/18

摘要： Process for treating sludge includes a first segment in which a batch of sludge and lime are mixed with the addition of supplement heat to achieve an elevated processing temperature and a second segment in which the mixer is maintained at a lower temperature to dry the interior of the mixing device after processing the batch.