ClassID:

86470

C02F2101/166 - CPC Classification

Classification description:

Nature of the contaminant; Inorganic compounds; Nitrogen compounds, e.g. ammonia Nitrites

Recent Application in this class:
#1
20260062312
2026-03-05

METHOD OF PREPARING AMORPHOUS IRON SULFIDE CARRIER FOR REMOVING NITROGEN FROM WATER

#2
20250263314
2025-08-21

ELECTROLYTIC REMOVAL OF NITROGEN FROM WATER

#3
20250011207
2025-01-09

Methods of treating water

#4
20240344010
2024-10-17

TEMPERATURE CONTROLLED BIOLOGICAL GROWTH SURFACES FOR HIGHER MICROBIAL ACTIVITY IN BIOPROCESSING

#5
20240327263
2024-10-03

SYSTEM FOR BIOLOGICAL PHOSPHORUS AND NITROGEN REMOVAL IN AN ACTIVATED SLUDGE PROCESS

#6
20240260550
2024-08-08

FRESHWATER RECIRCULATING AQUACULTURE INSTALLATION

#7
20240191178
2024-06-13

SALT-TOLERANT HETEROTROPHIC NITRIFICATION AEROBIC DENITRIFICATION PHOSPHORUS REMOVAL BACTERIAL STRAIN AND APPLICATION THEREOF

#8
20240166542
2024-05-23

METHOD AND DEVICE FOR IN-SITU ENRICHING ANAMMOX BACTERIA BY CONVENTIONAL ACTIVATED SLUDGE

#9
20240109798
2024-04-04

Method and device for realizing advanced nitrogen removal of mature landfill leachate and sludge reduction by using sludge fermentation products as carbon source

#10
20240092669
2024-03-21

Ozone treatment of mining effluents.

#11
20240067546
2024-02-29

Device and method for enhancing nitrogen and phosphorus removal based on multistage AO partial denitrification coupled with anammox in combination with sludge hydrolytic acidification

#12
20240002268
2024-01-04

Simultaneous Nitritation and Denitritation System

#13
20230357054
2023-11-09

WATER TREATMENT METHOD, WATER TREATMENT SYSTEM, CARBONIZED COMBUSTION MATERIAL, AND METHOD FOR PRODUCING CARBONIZED COMBUSTION MATERIAL

#14
20230202945
2023-06-29

Gasification and Fischer-Tropsch process waste water treatment

#15
20230073040
2023-03-09

Method for decontaminating a liquid

#16
20220312747
2022-10-06

Recirculating aquaculture system using biofloc fermenter and aquaponics

#17
20220266226
2022-08-25

Organic wastewater treatment method based on multi-element co-doping TiO2 nano photocatalytic material

#18
20220259084
2022-08-18

Biological phosphorus and nitrogen removal in activated sludge processing

#19
20220194834
2022-06-23

Method for treating wastewater or sludge

#20
20220048799
2022-02-17

Rotating cored-type biological treatment device of low-carbon-source wastewater and usage method therefor

#21
20210363043
2021-11-25

Cow excreta treatment apparatus and method

#22
20210340044
2021-11-04

Denitrification of water using bacteria

#23
20210261450
2021-08-26

Water treatment method and water treatment apparatus

#24
20210230028
2021-07-29

Catalytic hydrogel membrane reactor for treatment of aqueous contaminants

#25
20210188676
2021-06-24

Method for treating domestic sewage

#26
20210147270
2021-05-20

NITROGEN TREATMENT METHOD

#27
20200396969
2020-12-24

Aquaculture filtration systems

#28
20200377398
2020-12-03

Partial nitrification-denitrification coupled two-stage autotrophic denitrification advanced nitrogen removal method

#29
20200361800
2020-11-19

Composition for water treatment and methods of manufacture

#30
20200361792
2020-11-19

Apparatus to remove harmful chemical species from industrial wastewater using iron-based products

#31
20200325051
2020-10-15

WASTEWATER TREATMENT SYSTEM USING ANAEROBIC AMMONIUM OXIDATION IN MAINSTREAM

#32
20200299163
2020-09-24

Method for the biological treatment of nitrogen in effluents by nitritation

#33
20200207650
2020-07-02

Sequencing batch reactor for sewage treatment and sewage treatment system comprising same

#34
20200079669
2020-03-12

Water treatment apparatus for removing nitrogen contained in raw water and water treatment method using the same

#35
20200045944
2020-02-13

Filter material for culture system, and preparation method and use thereof

#36
20200017388
2020-01-16

Process for the biological purification of nutrient-contaminated wastewater

#37
20200016531
2020-01-16

Method for NOuptake using a particulate earth alkali carbonate-comprising material and/or particulate earth alkali phosphate-comprising material

#38
20190300403
2019-10-03

Separation of ozone oxidation in liquid media into three unit operations for process optimization

#39
20190119135
2019-04-25

Disk filter for preventing scale formation and water treatment apparatus and method using the same

#40
20190084858
2019-03-21

Method for treating and recycling organic wastewater and apparatus

#41
20190082661
2019-03-21

Disinfection and removal of nitrogen species from saline aquaculture systems

#42
20180297875
2018-10-18

Sequencing batch reactor for sewage treatment and sewage treatment system comprising same

#43
20180230030
2018-08-16

Composition for water treatment and methods of manufacture

#44
20180148681
2018-05-31

Composition capable of promoting the growth of denitrifying microorganisms and uses thereof

#45
20180136186
2018-05-17

Water quality analysis device

#46
20180029908
2018-02-01

Algae scrubber with directed water flow

#47
20180009690
2018-01-11

Flow equalization reactor having multiple wastewater treatment zones

#48
20180009685
2018-01-11

Method and composition for reducing nitrates, nitrites, and/or hydroxylamine in water using a homogeneous reduced copper tetra-substituted fluorinated pinacolate ligand catalyst complex

#49
20180002208
2018-01-04

Wastewater Treatment System

#50
20170318762
2017-11-09

Method and system of cultivating aquatic product and plant

#51
20170275192
2017-09-28

Method for nitrogen removal from aqueous medium

#52
20170210639
2017-07-27

Water purification

#53
20170096354
2017-04-06

BDP sewage denitrogenation treatment system and method for sewage denitrogenation treatment

#54
20160115059
2016-04-28

System and process for removing nitrogen compounds and odors from wastewater and wastewater treatment system

#55
20160096754
2016-04-07

Wastewater treatment system

#56
20160082410
2016-03-24

Permeable porous composite

#57
20160075577
2016-03-17

Moving bed media flow equalization reactor

#58
20150353397
2015-12-10

WATER REUSE SYSTEM AND METHOD

#59
20150232361
2015-08-20

Method and apparatus for decreasing the content of impurities in raw water

#60
20150191715
2015-07-09

Water treatment processes using biocatalysts

#61
20140353247
2014-12-04

Water denitrification

#62
20140034576
2014-02-06

Filtering medium for fluid purification

#63
20130256217
2013-10-03

Process and apparatus for controlling aeration during nitrification and denitrification of water

#64
20130240420
2013-09-19

System and process for removing nitrogen compounds and odors from wastewater and wastewater treatment system

#65
20130193038
2013-08-01

System and process for removing nitrogen compounds and odors from wastewater and wastewater treatment system

#66
20130123564
2013-05-16

Method and System for Stabilizing Volatile Radionuclides During Denitration at High Temperatures

#67
20130105391
2013-05-02

Modules for use in and operation of a membrane biofilm reactor with reduced biofouling

#68
20120160775
2012-06-28

Permeable porous composite

#69
20120091045
2012-04-19

System and process for removing nitrogen compounds and odors from wastewater and wastewater treatment system

#70
20120085705
2012-04-12

Wastewater chemical/biological treatment method for open water discharge

#71
20110303605
2011-12-15

Electrobiochemical Reactor

#72
20110297596
2011-12-08

Apparatus merging wetland plants with a floating substrate to treat pollution in any river, lake or body of water

#73
20110284391
2011-11-24

PROCESS AND APPARATUS FOR SEPARATING NITROAROMATICS FROM WASTEWATER

#74
20110183159
2011-07-28

Electricity generation using microbial fuel cells

#75
20110180476
2011-07-28

Anammox bacterium isolate

#76
20110180423
2011-07-28

METHODS FOR REMOVING CONTAMINANTS FROM AQUEOUS SOLUTIONS USING PHOTOELECTROCATALYTIC OXIDIZATION

#77
20110127216
2011-06-02

METHOD AND DEVICE FOR BIOLOGICAL TREATMENT OF WATER IN SWIMMING POOLS

#78
20110006001
2011-01-13

Method and system for surface water treatment

#79
20100096339
2010-04-22

Water denitrification

#80
20090272690
2009-11-05

Method for the treatment of ammonia-containing waste water

#81
20090111156
2009-04-30

METHOD OF FEEDING MICROBIAL ACTIVITY CONTROLLING SUBSTANCE, APPARATUS THEREFOR, AND MAKING USE OF THE SAME, METHOD OF ENVIRONMENTAL CLEANUP AND BIOREACTOR

#82
20090090670
2009-04-09

WASTEWATER TREATMENT SYSTEM AND METHOD

#83
20090008326
2009-01-08

METHOD AND APPARATUS FOR COLLECTING BACTERIAL CELLS, METHOD FOR ACCLIMATIZING BACTERIAL CELLS, AND WASTEWATER TREATMENT EQUIPMENT

#84
20090008315
2009-01-08

Equipment for wastewater treatment comprising anaerobic ammonium oxidation vessel and acclimatization vessel

#85
20090008314
2009-01-08

METHOD AND APPARATUS FOR COLLECTING BACTERIAL CELLS, METHOD FOR ACCLIMATIZING BACTERIAL CELLS, AND WASTEWATER TREATMENT EQUIPMENT

#86
20090001002
2009-01-01

Wastewater purification plant by means of plants

#87
20080302736
2008-12-11

Bimetallic catalyst for the treatment of water containing nitrates

#88
20080251461
2008-10-16

Water treatment process

#89
20080190866
2008-08-14

Method for processing aqueous effluents containing metal nitrate or nitrite salts

#90
20070272610
2007-11-29

Method and apparatus for collecting and acclimatizing anaerobic ammonium oxidizing bacteria, and denitrifying water

#91
20070170112
2007-07-26

Wastewater treatment system and method

#92
20060201878
2006-09-14

Biomembrane filtration apparatus and method

#93
20060196815
2006-09-07

Apparatus for removing nitrogen

#94
20060081532
2006-04-20

Consortium of nitrifying bacteria

#95
20050279702
2005-12-22

Method for operating anaerobic ammonium oxidation vessel and anaerobic ammonium oxidation equipment

#96
20050269271
2005-12-08

Apparatus for treating water

#97
20050255539
2005-11-17

Method for collecting and acclimatizing anaerobic ammonuim oxidizing bacteria, and denitrifing water

#98
20050211629
2005-09-29

Method and apparatus of removing nitrogen

#99
17449962
2023-06-27

Systems and processes for removing pollutants from water, reducing greenhouse gas emissions, and reducing aquatic ecosystem destruction

#100
15977311
2022-10-04

Method of treating a liquid with nanobubbles

#101
15072012
2021-11-30

Treatment systems including cover systems and media