ClassID:

86366

C02F3/20 - CPC Classification

Classification description:

Biological treatment of water, waste water, or sewage; Aerobic processes; Activated sludge processes using diffusers

Sub-classes:
Recent Application in this class:
#1
20260138903
2026-05-21

SYSTEM AND METHOD FOR REMOVAL OF PHOSPHORUS FROM A WATER SOURCE

#2
20260115678
2026-04-30

GASIFICATION DEVICE

#3
20260028258
2026-01-29

BIOFILM REACTOR FOR TREATING WASTEWATER

#4
20260001795
2026-01-01

RETROFITTABLE SYSTEM FOR WASTEWATER TREATMENT THROUGH PRIORITIZATION OF MICROORGANISM DIGESTION FUNCTION

#5
20250333342
2025-10-30

WASTEWATER FILTERING METHOD AND APPARATUS COMPRISING FILTER MEDIA OF DIFFERENT SIZES

#6
20250333341
2025-10-30

WASTEWATER FILTERING METHOD AND APPARATUS COMPRISING FILTER MEDIA OF DIFFERENT SIZES

#7
20250263319
2025-08-21

APPARATUS AND METHOD FOR BIOLOGICAL TREATMENT OF ORGANIC WASTEWATER

#8
20250230082
2025-07-17

METHOD FOR TREATING HIGH-CONCENTRATION FERMENTATION BY-PRODUCTS GENERATED IN AMINO ACID FERMENTATION PROCESS

#9
20250230081
2025-07-17

SEWAGE TREATMENT DEVICE AND METHOD

#10
20250197264
2025-06-19

WASTEWATER TREATMENT APPARATUS AND WASTEWATER TREATMENT METHOD

#11
20250197262
2025-06-19

Wastewater Biological Selector System and Methods for Treating Wastewater Process Fluid

#12
20250122109
2025-04-17

Waste water treatment system

#13
20250092871
2025-03-20

Sump Filter w/ C.O.D.

#14
20250051204
2025-02-13

MODIFIED MEMBRANE BIOREACTOR(MBR) SYSTEM AND METHOD FOR REMOVING PER- AND POLYFLUOROALKYL SUBSTANCES (PFAS) FROM A FLOW OF WASTEWATER AND/OR LANDFILL LEACHATE

#15
20240400429
2024-12-05

WASTEWATER TREATMENT SYSTEM INCLUDING A MOVING BED ASSEMBLY

#16
20240368014
2024-11-07

BIOREACTOR FOR HOME SEPTIC UNIT

#17
20240351924
2024-10-24

PUMP-BASED SYSTEM FOR WASTEWATER TREATMENT THROUGH MICROORGANISM BIOCHEMICAL PATHWAY OPTIMIZATION

#18
20240262725
2024-08-08

SYSTEMS AND METHODS FOR CREATING AND SEGMENTING TREATMENT PROCESSES

#19
20240199459
2024-06-20

APPARATUS AND METHOD FOR RECYCLING BLACKWATER AND GREYWATER AT OIL AND GAS WELL SITES

#20
20240166542
2024-05-23

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

#21
20240083790
2024-03-14

Wastewater Treatment Method and System

#22
20240076219
2024-03-07

BIOFILM REACTOR HAVING AT LEAST ONE WEIGHTED MEMBER

#23
20240075434
2024-03-07

WATER TREATMENT SYSTEM WITH RETRIEVABLE MOUNTING FRAME ASSEMBLY FOR DIFFUSORS

#24
20230399247
2023-12-14

BIOFILM REACTOR FOR TREATING WASTEWATER

#25
20230373830
2023-11-23

Atomizer-based system for wastewater treatment through microorganism biochemical pathway optimization

#26
20230322597
2023-10-12

Systems for Removing Sludge from or Distributing Fluids in Sludge or Waste Collection Vessels

#27
20230202891
2023-06-29

WASTEWATER FILTERING METHOD AND APPARATUS COMPRISING FILTER MEDIA OF DIFFERENT SIZES

#28
20230038072
2023-02-09

Systems and methods for creating and segmenting treatment processes

#29
20230031729
2023-02-02

SYSTEMS AND METHODS FOR TREATMENT PROCESSES

#30
20230020881
2023-01-19

HIGH-PRECISION, HIGH-EFFICIENCY RECIRCULATION SYSTEM FOR PRESERVING MULTIPLE-DENSITY BIOMASS AND ATTACHED BIOFILM IN WASTEWATER TREATMENT BIOREACTORS

#31
20220312747
2022-10-06

Recirculating aquaculture system using biofloc fermenter and aquaponics

#32
20220306503
2022-09-29

Method and device for removing organic micropollutants (OMPs) in water

#33
20220258109
2022-08-18

Water treatment system with retrievable mounting frame assembly for diffusors

#34
20220242762
2022-08-04

Wastewater treatment apparatus and process therefor

#35
20220234927
2022-07-28

Mixing systems and methods of mixing

#36
20220234926
2022-07-28

SYSTEM FOR MICROORGANISM BASED TREATMENT OF WASTEWATER

#37
20220234925
2022-07-28

SYSTEM AND METHOD FOR PURIFYING DOMESTIC WASTEWATER USING ONE CYCLE A DAY

#38
20220227647
2022-07-21

WATER TREATMENT SYSTEM, WATER TREATMENT METHOD, AND RECORDING MEDIUM

#39
20220135457
2022-05-05

Apparatus and method for recycling blackwater and greywater at oil and gas well sites

#40
20220098075
2022-03-31

WATER TREATMENT METHOD AND WATER TREATMENT APPARATUS

#41
20220073390
2022-03-10

Fixed biofilm anaerobic-aerobic combined reactor for treating wastewater

#42
20220041481
2022-02-10

Floating individualized air supply for wastewater aeration

#43
20220039361
2022-02-10

Industrial fish breeding complex and a method of water regeneration

#44
20220017396
2022-01-20

Continuous-, linear-, flexible-channel sewage treatment process, through a modified aerobic biological reactor system, or transformation of an existing anaerobic biological reactor into a modified aerobic biological reactor, coupled with a modified flexible flotation/decanting system

#45
20210395122
2021-12-23

Apparatus and method for biological treatment of organic wastewater

#46
20210395121
2021-12-23

Bio-enhanced deodorization equipment

#47
20210380449
2021-12-09

AUTOMATIC SEWAGE TREATMENT SYSTEM AND REPARATION METHOD OF BIOLOGICAL CARRIER

#48
20210371313
2021-12-02

Alternate method to induce biological treatment into contaminated areas

#49
20210371311
2021-12-02

METHOD OF PURIFYING LAKE WATER USING NANO AND MICRO BUBBLE

#50
20210363043
2021-11-25

Cow excreta treatment apparatus and method

#51
20210363038
2021-11-25

Device for sewage treatment

#52
20210292200
2021-09-23

Nitrite-oxidizing bacteria activity inhibitor and method

#53
20210276902
2021-09-09

WASTEWATER TREATMENT SYSTEM

#54
20210246056
2021-08-12

Method for wastewater treatment through microorganism biochemical pathway optimization

#55
20210238073
2021-08-05

Aeration device

#56
20210130207
2021-05-06

Microorganism preparation feeding method, microorganism preparation automatic feeding apparatus, and wastewater processing system

#57
20210114904
2021-04-22

Systems for removing sludge from or distributing fluids in sludge or waste collection vessels

#58
20210101121
2021-04-08

Water treatment system with retrievable mounting frame assembly for diffusors

#59
20210039974
2021-02-11

Mixing systems and methods of mixing

#60
20200399156
2020-12-24

VacFlush adaptor for submersible pumps

#61
20200360873
2020-11-19

Combined coarse and fine bubble diffuser

#62
20200354245
2020-11-12

Aeration diffuser system, wastewater treatment system including same, and associated monitoring method

#63
20200339455
2020-10-29

Water treatment aerator having bubble diffuser

#64
20200308020
2020-10-01

Regulating tank of wastewater treatment system

#65
20200270155
2020-08-27

System and method for wastewater treatment through microorganism biochemical pathway optimization

#66
20200255310
2020-08-13

Water treatment reactors, systems and methods

#67
20200207650
2020-07-02

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

#68
20200079669
2020-03-12

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

#69
20200062628
2020-02-27

Bioreactor for treating sewage and sewage treatment system comprising the same

#70
20200062625
2020-02-27

System for wastewater treatment through controlling microorganism purification functions

#71
20200055757
2020-02-20

System and method for controlled gas-dispersion-return-sludge-based wastewater treatment

#72
20200031697
2020-01-30

Organic wastewater treatment method and organic wastewater treatment device

#73
20200017386
2020-01-16

Wastewater treatment system, air supply amount control device, and air supply amount control method

#74
20200001253
2020-01-02

Bubble generating device for sewage purification

#75
20190389753
2019-12-26

Biological treatment installation with sequencing batch reactor integrating purifying plants and moving biomass carriers, and method of implementation

#76
20190382295
2019-12-19

Water treatment

#77
20190375661
2019-12-12

Helical Bed Biofilm Reactor for Wastewater Treatment

#78
20190367398
2019-12-05

Multi-parameter enhancement of membrane bioreactor process efficiency by biomass selection and selective biomass wasting

#79
20190366278
2019-12-05

FLUID FLOW CONTROL APPARATUS

#80
20190336917
2019-11-07

SYSTEM FOR AERATING A SUBMERGED MEMBRANE

#81
20190322559
2019-10-24

System and method for wastewater treatment using selective gas-dispersion return sludge delivery

#82
20190308894
2019-10-10

Apparatus and method for aerating wastewater

#83
20190263693
2019-08-29

Vacuum enhanced operation method for forward osmosis membrane bioreactors

#84
20190168165
2019-06-06

MEMBRANE BIOREACTOR SYSTEM

#85
20190151804
2019-05-23

Siphon-type air diffusion device, membrane bioreactor, and water treatment method

#86
20190135668
2019-05-09

Mixing systems and methods of mixing

#87
20190127250
2019-05-02

Control of a centralized air production system for a wastewater treatment plant

#88
20190100451
2019-04-04

Systems and methods for treatment processes

#89
20190092666
2019-03-28

Sewage treatment system using granule

#90
20190077684
2019-03-14

System for Treating Sewage

#91
20190071334
2019-03-07

System and method for treatment of wastewater

#92
20190070795
2019-03-07

Sintered and porous articles having improved flexural strength

#93
20190039925
2019-02-07

System and method for treating wastewater

#94
20180354827
2018-12-13

Bioreactor for wastewater treatment

#95
20180340325
2018-11-29

Systems for removing sludge from or distributing fluids in sludge or waste collection vessels

#96
20180297879
2018-10-18

Bioreactor for treating sewage and sewage treatment system comprising the same

#97
20180297875
2018-10-18

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

#98
20180272282
2018-09-27

Aerator apparatus and air diffusion apparatus comprising same

#99
20180257966
2018-09-13

Wastewater treatment apparatus

#100
20180244551
2018-08-30

Wastewater treatment carrier, wastewater treatment carrier module, wastewater treatment carrier unit, and wastewater treatment apparatus

#101
20180184626
2018-07-05

Contra-rotating multi-layer propeller unit for multi-phase flow

#102
20180155225
2018-06-07

INDIVIDUAL SEPTIC TANK UNIT

#103
20180148363
2018-05-31

System for improving sludge water into ecological water system

#104
20180134596
2018-05-17

Microbubble aerator

#105
20180134593
2018-05-17

Equipment and process for massive dissolution of gases in liquids

#106
20180093908
2018-04-05

Enhanced Membrane Bioreactor Process for Treatment of Wastewater

#107
20180043316
2018-02-15

AERATION OF LIQUID SUITABLE FOR AQUEOUS WASTE TREATMENT

#108
20170369348
2017-12-28

Wastewater treatment system

#109
20170334756
2017-11-23

Device for housing beneficial microbes for the purpose of water remediation

#110
20170327395
2017-11-16

System and method for treating wastewater

#111
20170320761
2017-11-09

Water treatment reactor

#112
20170313607
2017-11-02

Water treatment system and method

#113
20170305772
2017-10-26

System for Treating Sewage

#114
20170275193
2017-09-28

High efficiency wastewater treatment system

#115
20170253511
2017-09-07

SYSTEM AND METHOD FOR HOUSEHOLD WASTE WATER TREATMENT

#116
20170239628
2017-08-24

Low Energy Aeration

#117
20170225988
2017-08-10

Sequencing batch facility and method for reducing the nitrogen content in waste water

#118
20170158536
2017-06-08

Treatment for reuse for decentralized domestic systems

#119
20170152168
2017-06-01

LOW-PRESSURE AERATION TREATMENT OF BIOLOGICAL WASTEWATER

#120
20170144910
2017-05-25

MULTISTAGE AERATION SYSTEM

#121
20170050872
2017-02-23

Wastewater treatment system

#122
20170050155
2017-02-23

Mounting device for an aeration element and aerator

#123
20170015573
2017-01-19

Removable nozzle assembly and gas transfer system

#124
20160304377
2016-10-20

EXPEDITIONARY WASTEWATER RECYCLING SYSTEM

#125
20160304373
2016-10-20

LOW ENERGY ACID MINE DRAINAGE TREATMENT PROCESS AND SYSTEM

#126
20160272522
2016-09-22

Method for enhanced aerobic activity and bio-mat control for onsite wastewater disposal systems

#127
20160264441
2016-09-15

Method and facility for the aerobic biological treatment of effluent, in particular wastewater

#128
20160199792
2016-07-14

Dual control lateral air manifold assembly

#129
20160185632
2016-06-30

METHOD AND INSTALLATION FOR REMOVING SULPHUR FROM THE DIGESTATE AND THE BIOGAS OF A DIGESTER

#130
20160122216
2016-05-05

Aerator/digester for water treatment

#131
20160115059
2016-04-28

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

#132
20160107909
2016-04-21

Orbital wastewater treatment system and method of operating same

#133
20160046516
2016-02-18

Diffused aeration systems and methods for cleaning fouled diffusers in aeration systems

#134
20150336827
2015-11-26

Biofilm media, treatment system and method of wastewater treatment

#135
20150321932
2015-11-12

Method and apparatus for upflow algae scrubber, macroalgal photobioreactor and sea weed cultivator

#136
20150306551
2015-10-29

Aeration equipment

#137
20150265980
2015-09-24

AIR DIFFUSION DEVICE, AIR DIFFUSION METHOD, AND WATER TREATMENT DEVICE

#138
20150218023
2015-08-06

Method and apparatus for the treatment of water with a gas or nutrient infused liquid

#139
20150191383
2015-07-09

SUBMERGED FILTRATION SYSTEM AND WASTEWATER TREATMENT METHOD

#140
20150190763
2015-07-09

Aeration nozzle, and blockage removal method for said aeration nozzle

#141
20150166379
2015-06-18

Wastewater treatment system

#142
20150108067
2015-04-23

Reduction of substances in contaminated fluids using a naturally occurring biological growth media

#143
20150041376
2015-02-12

Integrated water treatment system

#144
20150014246
2015-01-15

Wastewater treatment apparatus and process therefor

#145
20150001149
2015-01-01

Wastewater treatment methods

#146
20150001094
2015-01-01

Processes and apparatuses for removal of carbon, phosphorus and nitrogen

#147
20140374346
2014-12-25

Wastewater treatment apparatus, wastewater treatment method, wastewater treatment system, control device, and control method

#148
20140374345
2014-12-25

Wastewater treatment apparatus, wastewater treatment method, wastewater treatment system, control device, and control method

#149
20140360934
2014-12-11

AERATION OF LIQUID SUITABLE FOR AQUEOUS WASTE TREATMENT

#150
20140263047
2014-09-18

Wastewater treatment system

#151
20140263000
2014-09-18

Methods and apparatuses for water treatment

#152
20140183129
2014-07-03

Mixing systems and methods of mixing

#153
20140151276
2014-06-05

Wastewater effluent to geothermal heating

#154
20140095115
2014-04-03

In situ monitoring for wastewater treatment systems and the like

#155
20140076802
2014-03-20

OPERATING METHOD FOR AIR DIFFUSION APPARATUS

#156
20130256217
2013-10-03

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

#157
20130240420
2013-09-19

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

#158
20130233779
2013-09-12

Method and apparatus for upflow algae scrubber, macroalgal photobioreactor and seaweed cultivator

#159
20130088190
2013-04-11

ENERGY RECOVERY DURING WASTEWATER TREATMENT

#160
20130046040
2013-02-21

POLYETHYLENE POWDERS AND POROUS ARTICLES PRODUCED THEREFROM

#161
20130020728
2013-01-24

Device for aerating a suspension held in a treatment tank

#162
20120312745
2012-12-13

Mixing systems and methods of mixing

#163
20120228216
2012-09-13

FLOATING WATER TREATMENT DEVICE

#164
20120152837
2012-06-21

BIOLOGICAL TREATMENT METHOD OF ORGANIC-MATTER-CONTAINING WATER

#165
20120152832
2012-06-21

Submerged system and method for removal of undesirable substances from aqueous media

#166
20120152831
2012-06-21

Apparatus for cleaning wastewater

#167
20120067797
2012-03-22

Bioreactor system for aquarium and septic tank

#168
20120037574
2012-02-16

WATER TREATMENT REACTOR AERATION SUPPORT

#169
20120012526
2012-01-19

Accelerated bioremediation using supplemental compositions and oxygenated water

#170
20110303594
2011-12-15

Flat plate membrane bioreactor with a liquid air separator

#171
20110272831
2011-11-10

Wastewater treatment system

#172
20110248413
2011-10-13

Device for supplying gas into water

#173
20110215042
2011-09-08

Diffuser assembly with buoyancy vessel

#174
20110203984
2011-08-25

Apparatus for deodorizing sewage treatment plant sludge by using native microorganisms

#175
20110200453
2011-08-18

Efficiency optimized air flow apparatus and method

#176
20110186489
2011-08-04

Gasification grey water treatment systems

#177
20110180467
2011-07-28

Submerged biofiltration purifying apparatus

#178
20110133348
2011-06-09

Diffuser for aeration

#179
20110132822
2011-06-09

Floating bioreactor system

#180
20110121472
2011-05-26

Aeration device for the introduction of gas bubbles into a liquid medium

#181
20110101548
2011-05-05

Diffuser for aeration

#182
20110100904
2011-05-05

Method and unit for the purification of wastewater with aerobic granular sludge

#183
20110084416
2011-04-14

Mixing systems and methods of mixing

#184
20100300965
2010-12-02

Diffuser apparatus, and diffuser apparatus running method

#185
20100288698
2010-11-18

METHOD FOR REMOVING PHOSPHORUS USING MEMBRANE BIOREACTOR

#186
20100200502
2010-08-12

SEPTIC SYSTEM REMEDIATION METHOD AND APPARATUS

#187
20100187173
2010-07-29

Methods of providing an aerobic medium in a wastewater treatment bioreactor compartment

#188
20100065439
2010-03-18

Method of Operating a Capacitive Deionization Cell Using a Relatively Slow Discharge Flow Rate

#189
20100051542
2010-03-04

Wastewater treatment system and method

#190
20100051521
2010-03-04

Bio tank/gas replenishment system

#191
20100044322
2010-02-25

Aeration unit, aeration apparatus equipped therewith and method of aeration

#192
20100044318
2010-02-25

Nitrification and denitrification of digested biosolids

#193
20090277830
2009-11-12

Septage treatment system and method of treating septage

#194
20090250396
2009-10-08

DRAINAGE WATER-TREATING METHOD AND DRAINAGE WATER-TREATING APPARATUS

#195
20090200687
2009-08-13

TREATMENT SYSTEM FOR LIQUID

#196
20090145827
2009-06-11

Water treatment system

#197
20090051057
2009-02-26

Diffuser for aeration

#198
20090008311
2009-01-08

Pure Oxygen Aeration System for Wastewater Treatment

#199
20080296221
2008-12-04

Method for the treatment of wastewater

#200
20080264843
2008-10-30

Manufacturing device and application device for liquid containing micro-nano bubbles

#201
20080224337
2008-09-18

Diffuser assembly with buoyancy vessel

#202
20080203006
2008-08-28

Self-standing weighted diffuser assembly

#203
20080185344
2008-08-07

Aeration Method, Aeration Apparatus and Aeration System

#204
20080185335
2008-08-07

Septic system remediation method and apparatus

#205
20080105602
2008-05-08

System for the treatment of wastewater

#206
20080023412
2008-01-31

Portable tank wastewater treatment system and method

#207
20080017574
2008-01-24

Device for in situ bioremediation of liquid waste

#208
20080003669
2008-01-03

HYBRID AERATION MEMBRANE BIOREACTOR

#209
20070138070
2007-06-21

Process and energy-efficient biological treatment system with filtration membrane

#210
20070114176
2007-05-24

Water treatment method and water treatment apparatus

#211
20070095751
2007-05-03

Water treatment method and water treatment system

#212
20070095737
2007-05-03

Aeration vessel and aerator assembly for use in a wastewater treatment system

#213
20070068869
2007-03-29

Waste water treatment method and waste water treatment apparatus

#214
20070045179
2007-03-01

System and method for introducing high pressure air into a wastewater treatment system

#215
20070023356
2007-02-01

Active biological contactor (ABC); a modular wastewater treatment system

#216
20070012620
2007-01-18

Apparatus for recovering energy from turbulence created within an aerobic biological reactor

#217
20060254980
2006-11-16

Mixer for use in wastewater treatment processes

#218
20060254979
2006-11-16

Mixer and process controller for use in wastewater treatment processes

#219
20060254977
2006-11-16

Mixer for use with media in wastewater treatment

#220
20060213831
2006-09-28

Energy-efficient biological treatment system with filtration membrane

#221
20060186042
2006-08-24

Waste treatment method

#222
20060163753
2006-07-27

Controlled atmosphere gas infusion

#223
20060163156
2006-07-27

Degradation treatment process and system for organics in organically-polluted water

#224
20060103036
2006-05-18

Aeration system for liquid

#225
20060081534
2006-04-20

Energy-efficient biological treatment with membrane filtration

#226
20060055068
2006-03-16

Air diffusing device

#227
20050284810
2005-12-29

Waste stream digestion method

#228
20050263914
2005-12-01

Diffused gas aeration apparatus

#229
20050258094
2005-11-24

Sewage treatment process by activated-sludge method comprising line atomizing treatment

#230
20050236326
2005-10-27

Apparatus and method for aeration of wastewater

#231
20050146063
2005-07-07

Aerator

#232
20050127000
2005-06-16

Inverted air box aerator and aeration method for immersed membranes

#233
20050023202
2005-02-03

Apparatus for reduction of biological wasted sludge

#234
20050006308
2005-01-13

Inverted cavity aerator for membrane module

#235
20050003204
2005-01-06

Multiple layered membrane with fluorine containing polymer layer

#236
17963512
2024-09-03

Wastewater spray distribution apparatus

#237
17831304
2025-09-16

Liquid aeration and mixing apparatus float mount for wrap-around hand rail and grating

#238
16990095
2022-10-18

Wastewater spray distribution apparatus

#239
16879250
2022-01-18

Apparatus and method for recycling blackwater and greywater at oil and gas well sites

#240
16877856
2022-02-22

Floatable system and method for biologically treating wastewater using low density, high surface area substrates

#241
16667153
2020-08-04

Scat trap filter and aerator system

#242
16517637
2019-10-29

System and method for wastewater treatment through controlling purification functions of microorganisms based on activated sludge process

#243
16147144
2020-06-09

System and method for biologically treating wastewater using low density, high surface area substrates

#244
16025484
2019-12-31

Aerobic wastewater treatment systems and methods of fabrication

#245
16007495
2020-06-02

Apparatus and method for recycling blackwater and greywater at oil and gas well sites

#246
15956631
2019-01-01

System and method for gas-dispersion-return-sludge-based wastewater treatment

#247
15931775
2022-02-22

System and method for biologically treating wastewater using low density, high surface area substrates

#248
13662787
2015-09-08

Liquid aeration device