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公开(公告)号：US11772995B2
公开(公告)日：2023-10-03
申请号：US18190083
申请日：2023-03-25
发明人： Mu Liu , Mengyuan Duan , Zehua Li , Kai Sun , Yingqiang Su , Xikun Zhu , Huiming Han , Xiaofeng Lin , Jin Li
IPC分类号： C02F3/30 , C02F3/20 , C02F101/16 , C02F103/00
CPC分类号： C02F3/30 , C02F3/208 , C02F2101/16 , C02F2103/005 , C02F2203/006 , C02F2209/08 , C02F2209/15 , C02F2209/16 , C02F2209/40
摘要： A total nitrogen (TN) removal device for sewage and its operation method. The TN removal device includes a denitrification tank, a supplementary reaction zone filled with aerobic granular sludge and a sedimentation and separation zone. The supplementary reaction zone and the sedimentation and separation zone are arranged inside the denitrification tank, and communicated through a three-phase separator. The sedimentation and separation zone is located above the supplementary reaction zone. A top of the sedimentation and separation zone is greater than its bottom. A membrane aerated biofilm reactor (MABR) assembly is arranged in a space formed by outer walls of the sedimentation and separation zone and supplementary reaction zone and an inner chamber of the denitrification tank. A side wall of the denitrification tank is provided with a chemical oxygen demand (COD) detector and a nitrate nitrogen detector.
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2.发明授权公开(公告)号：US11772999B2
公开(公告)日：2023-10-03
申请号：US18193681
申请日：2023-03-31
发明人： Mu Liu , Zehua Li , Mengyuan Duan , Huiming Han , Xiaofeng Lin , Yingqiang Su , Kai Sun , Xikun Zhu , Liyan Zhang
CPC分类号： C02F9/00 , C02F1/006 , C02F1/5209 , C02F1/38 , C02F1/66 , C02F5/06 , C02F2001/5218 , C02F2201/005 , C02F2209/005 , C02F2209/06 , C02F2209/42 , C02F2209/44
摘要： A system and method for treating reverse-osmosis (RO) concentrated water with high temporary hardness. The system includes a crystallization unit, a precipitation unit, a dewatering unit, and a programmable logic controller (PLC) system. The crystallization unit, precipitation unit and dewatering unit are connected in series, and the PLC system is configured to control pumps, valves, and displays in the crystallization unit, precipitation unit and dewatering unit. The crystallization unit includes a storage tank and a crystallization reactor communicated therewith. The crystallization reactor is provided with a pH meter, a liquid-level gauge, and a stirrer. A connection pipe between the crystallization reactor and the RO concentrated water is provided with an inlet pump and a inlet valve. A connection pipe between the crystallization reactor and the storage tank is provided with a feeding pump and a feeding valve.
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3.发明授权公开(公告)号：US12023628B2
公开(公告)日：2024-07-02
申请号：US17501684
申请日：2021-10-14
发明人： Mu Liu , Xiaofeng Lin , Zehua Li , Yingqiang Su , Xiaohong Niu , Huiming Han , Xiaofang Zhang
CPC分类号： B01D61/04 , B01D61/027 , B01D65/02 , C02F1/442 , C02F9/00 , B01D65/08 , C02F1/001 , C02F2209/03 , C02F2209/05 , C02F2303/16
摘要： The present disclosure provides a drinking water purification system with a backwashable filter cartridge and a nanofiltration system. The drinking water purification system includes a backwashable pre-filtration unit, a nanofiltration unit and a cleaning unit. The backwashable pre-filtration unit is provided with a backwashable filter cartridge. The nanofiltration unit is provided with a nanofiltration filter cartridge. A water outflow side of the backwashable filter cartridge is connected to a water inflow side of the nanofiltration filter cartridge. The cleaning unit is connected to the water outflow side of the backwashable filter cartridge.
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公开(公告)号：US11440819B2
公开(公告)日：2022-09-13
申请号：US17703953
申请日：2022-03-24
发明人： Mu Liu , Yingqiang Su , Zehua Li , Kai Sun , Xiaofeng Lin , Huiming Han , Mengyuan Duan , Liyan Zhang
摘要： A dosing control method for micro-flocculation in ultrafiltration, including: calculating a preset value of a first differential pressure before an initial backwash and a preset value of a second differential pressure before a final backwash in each chemically enhanced backwash cycle; calculating a preset value of a third differential pressure between the first differential pressure and the second differential pressure according to the preset value of the first differential pressure and the preset value of the second differential pressure; obtaining a predicted value of the third differential pressure according to a differential pressure curve plotted based on online filtration differential pressure data; and comparing the preset value of the third differential pressure and the predicted value of the third differential pressure to determine whether to dose. A dosing control system is also provided.
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公开(公告)号：US11760675B2
公开(公告)日：2023-09-19
申请号：US18193685
申请日：2023-03-31
发明人： Mu Liu , Zehua Li , Huiming Han , Xiaofeng Lin , Yingqiang Su , Mengyuan Duan , Cong Xiao , Kai Sun , XiKun Zhu
IPC分类号： C02F9/00 , C02F1/52 , C02F1/62 , C02F1/72 , C02F3/30 , C02F1/58 , C02F101/18 , C02F101/20 , C02F103/34
CPC分类号： C02F9/00 , C02F1/52 , C02F1/586 , C02F1/62 , C02F1/725 , C02F3/30 , C02F2101/18 , C02F2101/20 , C02F2103/346 , C02F2209/06 , C02F2209/08
摘要： A system for treating printed circuit board wastewater (PCB) includes a production system, a pretreatment system, a biochemical system, a recovery system and a concentrated water treatment system. The production system is configured for producing process water and auxiliary water from tap water. The pretreatment system is configured to pretreat different wastewater samples separately. The biochemical system is configured to decompose the pretreated wastewater. The recovery system is configured to treat wastewater from the pretreatment system and the biochemical system to obtain process water and feed concentrated water to the concentrated water treatment system. The concentrated water treatment system is configured to treat the concentrated water to meet a discharge standard. A treatment method for the PCB wastewater is also provided.
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公开(公告)号：US11046593B2
公开(公告)日：2021-06-29
申请号：US16660739
申请日：2019-10-22
发明人： Zehua Li , Mu Liu , Qiaoyun Zhang , Huiming Han , Yuan Liu , Yingqiang Su , Hexing Zhang
摘要： The invention relates to sewage treatment, and more particularly to a system for treating reverse-osmosis concentrated water with permanent hardness. The system includes a first crystallization unit, a first reverse osmosis unit, a second crystallization unit, a lime softening unit and a second reverse osmosis unit, which are connected in sequence. The system of the invention is able to eliminate the permanent hardness and the temporary hardness of the concentrated brine, and the hardness can be reduced to equal to or less than 50 mg/L.
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