公开(公告)号：US20230202945A1

公开(公告)日：2023-06-29

申请号：US17912224

申请日：2021-03-16

Applicant: Velocys Technologies Limited

Inventor： Graham LEA

IPC: C07C1/04 ,  C01B3/48 ,  C02F9/00 ,  B09B3/40

CPC classification number: C07C1/0485 ,  C01B3/48 ,  C02F9/00 ,  B09B3/40 ,  C01B2203/0255 ,  C01B2203/0283 ,  C02F1/20

Abstract: In a process for treating wastewater from a combined gasification and Fischer-Tropsch (F-T) process, feedstock derived from Municipal Solid Waste or the like is gasified in a reactor (R) and treated in a cleanup unit (C) which generates a first wastewater stream (1st WWT STREAM) containing salts and inorganic pollutants. The first wastewater stream is treated in a treatment unit (T1) to remove inorganic pollutants derived from the syngas The treatment comprises a) degassing, and subsequently b) neutralising the first wastewater stream before treatment in a Dissolved Air Flotation unit (72c) and filtering in a moving sand bed or similar (72d) to remove solids, and a stripping process to remove ammonia. A second wastewater stream (2nd WWT Stream) containing organic pollutants but being low in salts arises from the F-T process and is treated separately to allow recycling within the F-T process.