ClassID:

86388

C02F3/286 - CPC Classification

Classification description:

Biological treatment of water, waste water, or sewage; Anaerobic digestion processes including two or more steps

Recent Application in this class:
#1
20260078322
2026-03-19

ANAEROBIC BIOGAS PLANT AND DIGESTION METHOD

#2
20250353766
2025-11-20

TWO-PHASE SULFATE REDUCTION DEVICE AND TREATMENT METHOD FOR PREVENTING SLUDGE CALCIFICATION

#3
20250136485
2025-05-01

HIGH-LOAD ORGANIC WASTEWATER DARK FERMENTATION BIOHYDROGEN PRODUCTION DEVICE AND HYDROGEN PRODUCTION METHOD

#4
20250074803
2025-03-06

SYSTEM AND METHOD OF HIGH EFFICACY TWO-STAGE METAL TREATMENT INCORPORATING BASIC OXYGEN FURNACE SLAG AND MICROBIAL SULFATE REDUCTION

#5
20250026674
2025-01-23

Method and System for Optimizing Lightweight Biodigester

#6
20250002386
2025-01-02

MEMBRANE BIOREACTOR SYSTEM FOR TREATING WASTEWATER USING OXYGEN

#7
20240417298
2024-12-19

SYSTEM FOR PRODUCING BIOGAS USING MIXED LIQUID OF DIGESTIVE FLUID TREATED WATER AND ORGANIC DRY SUBSTANCE

#8
20240158269
2024-05-16

Anaerobic Migrating Blanket Reactor and Methods of Using the Same

#9
20240102054
2024-03-28

METHOD OF REDUCING NITROGEN OXIDE CONCENTRATION IN SAMPLE, BIOREACTOR, AND PLUG FLOW REACTOR

#10
20230348305
2023-11-02

SYSTEM AND METHOD FOR TREATMENT OF ANIMAL MANURE CONTAINING WASTEWATER

#11
20230322599
2023-10-12

METHOD FOR CONTINUOUS CLEANING OF PROCESS WATER IN WASTE PAPER TREATMENT WITH CONTROL OF THE CONTENT OF INORGANIC SOLIDS

#12
20230150854
2023-05-18

METHOD AND APPARATUS FOR ANAEROBIC DIGESTION OF LIQUID WASTE STREAMS

#13
20230002265
2023-01-05

Struvite recovery and phosphorus management techniques for wastewater treatment plants

#14
20220289605
2022-09-15

Automated manifold for removing digestate from a lagoon digester

#15
20220243154
2022-08-04

ANAEROBIC BIOGAS PLANT AND DIGESTION METHOD

#16
20220242763
2022-08-04

Fail Safe Flushing BioReactor for Selenium Water Treatment

#17
20220162101
2022-05-26

Anaerobic digestion system

#18
20220106210
2022-04-07

Method for Cleaning Process Water Circulated in a Paper Recycling System using Enzymes

#19
20220089467
2022-03-24

Biogas production with select macro algae and nanoparticles added to anaerobic digester feedstock

#20
20220048798
2022-02-17

Maintaining a steady microbial community in a combined anaerobic-aerobic apparatus

#21
20210395125
2021-12-23

Modular system for waste treatment, water recycling, and resource recovery in a space environment

#22
20210331957
2021-10-28

Process and device for anaerobic purification

#23
20210284557
2021-09-16

Induced sludge bed anaerobic reactor system

#24
20210107818
2021-04-15

ANAEROBIC DIGESTION SYSTEM AND METHOD

#25
20210087087
2021-03-25

Simultaneous phase operated anaerobic sequential batch reactor

#26
20210079429
2021-03-18

MULTIPLE TANK HIGH SOLIDS ANAEROBIC DIGESTER

#27
20210061690
2021-03-04

Fail Safe Flushing BioReactor for Selenium Water Treatment

#28
20200339457
2020-10-29

Moving bed biofilm reactor system for selenium removal from water and wastewater

#29
20200216344
2020-07-09

Phosphorus release reactor for water treatment

#30
20200148567
2020-05-14

Induced sludge bed anaerobic reactor system

#31
20200131062
2020-04-30

Method of boron-contained wastewater treatment

#32
20200123035
2020-04-23

Two stage anaerobic digestion with intermediate hydrolysis

#33
20200062629
2020-02-27

Method for pre-conditioning sludge

#34
20200048121
2020-02-13

Hyper-rate anaerobic digestion system for enhanced bio-solids reduction

#35
20200002201
2020-01-02

Continuous flow wastewater treatment system

#36
20190367393
2019-12-05

ANAEROBIC DIGESTION SYSTEM AND METHOD

#37
20190300414
2019-10-03

SYSTEMS AND METHODS FOR PROCESSING ORGANIC COMPOUNDS

#38
20190284070
2019-09-19

Heaterless hydrolytic degritter

#39
20190270955
2019-09-05

Organic matter digesting apparatus

#40
20190225517
2019-07-25

Wastewater treatment with customized phosphate control

#41
20190185355
2019-06-20

Phosphorus release reactor for water treatment

#42
20190135673
2019-05-09

High-concentration sewage treatment system and method for self-sufficiency of energy

#43
20190106347
2019-04-11

Struvite recovery and phosphorus management techniques for wastewater treatment plants

#44
20190106341
2019-04-11

Multi-zone process and apparatus for treating wastewater

#45
20190031542
2019-01-31

Wastewater treatment system and gas liquid partition valve

#46
20190016619
2019-01-17

Induced sludge bed anaerobic reactor system

#47
20180370829
2018-12-27

Facility and method for biologically treating organic waste and effluents

#48
20180370827
2018-12-27

WASTEWATER TREATMENT PLANT ONLINE MONITORING AND CONTROL

#49
20180354007
2018-12-13

Process for treating solid waste containing an organic fraction

#50
20180297876
2018-10-18

Sewage treatment system

#51
20180230031
2018-08-16

BIOREACTOR FOR TREATING WATER FLUID(S) BY BIOMASS

#52
20180222782
2018-08-09

ANAEROBIC SUSPENDED GROWTH TREATMENT OF CONTAMINATED WATER

#53
20180117531
2018-05-03

Submerged membrane filtration system using reciprocating membrane

#54
20180093910
2018-04-05

Method and system for anaerobic treatment of organically loaded wastewater

#55
20180079672
2018-03-22

Systems and Methods for Processing Biogas

#56
20180065875
2018-03-08

Anaerobic Reactor for Wastewater Treatment

#57
20180057382
2018-03-01

System and method for waste treatment

#58
20180050941
2018-02-22

Two stage anaerobic digestion with intermediate hydrolysis

#59
20180002206
2018-01-04

Anaerobic digestion system and method

#60
20170369345
2017-12-28

Process and plant for separating off and/or recovering nitrogen compounds from a liquid or sludge substrate

#61
20170368485
2017-12-28

METHOD AND INSTALLATION FOR PRE-TREATMENT EMPLOYING A FILTER CAKE

#62
20170313608
2017-11-02

Fail Safe Flushing BioReactor for Selenium Water Treatment

#63
20170283833
2017-10-05

Multiple tank high solids anaerobic digester

#64
20170057853
2017-03-02

Submerged membrane filtration system using reciprocating membrane

#65
20160362649
2016-12-15

DUAL-MODE SYSTEM AND METHOD FOR PROCESSING ORGANIC MATERIAL

#66
20160326033
2016-11-10

Wastewater treatment system

#67
20160207810
2016-07-21

Fluidized bed reactor for ammonia laden wastewater and method for treating ammonia laden wastewater

#68
20160096761
2016-04-07

Systems and methods for processing organic compounds

#69
20160031734
2016-02-04

Water closet and septic system

#70
20160023935
2016-01-28

Treatment of municipal wastewater with anaerobic digestion

#71
20150368131
2015-12-24

Integrated system of a methanogenic anaerobic reactor and membrane bioreactor for the elimination of organic material and nitrogen from wastewater

#72
20150284280
2015-10-08

Modified activated sludge-based two-compartment treatment method for processing nitrate-contaminated drinking water and the device thereof

#73
20150218024
2015-08-06

Water treatment devices

#74
20150191384
2015-07-09

Method for treating organic waste, in particular sludge from wastewater treatment plants, and facility for implementing said method

#75
20150144554
2015-05-28

WASTEWATER TREATMENT PROCESS WITH MOVING BED BIOREACTOR (MBBR)

#76
20150114904
2015-04-30

System and method for waste treatment

#77
20150111271
2015-04-23

Multiple tank high solids anaerobic digester

#78
20150101967
2015-04-16

ANAEROBIC SUSPENDED GROWTH WATER TREATMENT OF CONTAMINATED WATER

#79
20150083662
2015-03-26

Anaerobic suspended growth treatment of contaminated water

#80
20150034553
2015-02-05

Wastewater treatment plant online monitoring and control

#81
20150001159
2015-01-01

Phosphate recovery from wastewater

#82
20140356927
2014-12-04

Anaerobic process

#83
20140263043
2014-09-18

S/M FOR BIOLOGICAL TREATMENT OF WASTEWATER WITH SELENIUM REMOVAL

#84
20140263006
2014-09-18

Wastewater treatment system

#85
20140251903
2014-09-11

HYDROLYTIC DEGRITTER

#86
20140238931
2014-08-28

Process for Treating Municiple Wastewater Employing Two Sequencing Biofilm Batch Reactors

#87
20140224730
2014-08-14

Wastewater treatment process including irradiation of primary solids

#88
20140224719
2014-08-14

Wastewater treatment system including irradiation of primary solids

#89
20140212956
2014-07-31

Method to stimulate and sustain the anaerobic biodegradation of light non-aqueous phase liquid

#90
20140209526
2014-07-31

DUAL STAGE BIOREACTOR SYSTEM FOR REMOVING SELENIUM FROM WATER

#91
20140131274
2014-05-15

Method and system for treating waste material

#92
20140124439
2014-05-08

Apparatus and method for anaerobic wastewater treatment with membrane

#93
20140083938
2014-03-27

Methods for treating waste water

#94
20140083935
2014-03-27

Systems, apparatuses and methods for treating waste water

#95
20140027377
2014-01-30

Process to treat industrial wastewater

#96
20140027373
2014-01-30

PARTIALLY DIVIDED ANAEROBIC TREATMENT SYSTEM

#97
20140014577
2014-01-16

Wastewater Treatment Method and Wastewater Treatment System

#98
20130327710
2013-12-12

Anaerobic lagoon or tank design for eflluent carbon to nitrogen ratio control

#99
20130319940
2013-12-05

WASTEWATER TREATMENT PROCESS WITH ANAEROBIC MBBR

#100
20130299420
2013-11-14

Phosphate recovery from acid phase anaerobic digesters

#101
20130299401
2013-11-14

System for enhancing a wastewater treatment process

#102
20130299334
2013-11-14

Process for the purification of an aqueous stream coming from the fischer-tropsch reaction

#103
20130264283
2013-10-10

Anaerobic reactor for wastewater treatment

#104
20130264281
2013-10-10

Apparatus and methods for control of waste treatment processes

#105
20130233795
2013-09-12

Anaerobic treatment method

#106
20130213883
2013-08-22

Treatment of municipal wastewater with anaerobic digestion

#107
20130126412
2013-05-23

Downflow denitrification system

#108
20130075328
2013-03-28

Anaerobic membrane bioreactor for treating a waste stream

#109
20130065290
2013-03-14

COMBINED DRY AND WET DUAL PHASE ANAEROBIC PROCESS FOR BIOGAS PRODUCTION

#110
20130022959
2013-01-24

Process for controlling and monitoring the production of biogas

#111
20120318734
2012-12-20

Methods for treating waste water

#112
20120312743
2012-12-13

Self-sustained microbial detoxification of soluble sulfate from environmental effluent

#113
20120261337
2012-10-18

System and method for wastewater treatment

#114
20120211416
2012-08-23

System for enhancing a wastewater treatment process

#115
20120175302
2012-07-12

APPARATUS AND METHODS FOR CONTROL OF WASTE TREATMENT PROCESSES

#116
20120156744
2012-06-21

Multi-Phase, Gas-Lift Bioreactor for Generation of Biogas or Biofuel From Organic Material

#117
20120152830
2012-06-21

Waste water treatment method

#118
20120135491
2012-05-31

METHOD FOR PRODUCING BIOGAS OR SEWAGE GAS

#119
20120125837
2012-05-24

ANAEROBIC DIGESTION PROCESS AND APPARATUS

#120
20120080374
2012-04-05

OZONE AND ANAEROBIC BIOLOGICAL PRETREATMENT FOR A DESALINATION PROCESS

#121
20120073189
2012-03-29

Treatment equipment of organic waste and treatment method

#122
20120067800
2012-03-22

System and method for sewage and wastewater treatment

#123
20120067796
2012-03-22

METHOD AND APPARATUS USING HYDROGEN PEROXIDE AND MICROWAVE SYSTEM FOR SLURRIES TREATMENT

#124
20120058534
2012-03-08

OPTIMIZED BIOGAS (BIOMETHANE) PRODUCTION PROCESS

#125
20120042606
2012-02-23

Systems and methods for ballasting covers for gas-holding sludge digestors

#126
20120031194
2012-02-09

Method for diagnosing the operation of a water purification installation of the filter medium device type, and a diagnostic tool suitable for said method

#127
20120021500
2012-01-26

BIOGAS PRODUCING SYSTEM

#128
20120021476
2012-01-26

Trace Element Solution For Biogas Methods

#129
20110315561
2011-12-29

TREATMENT OF SOLUTIONS OR WASTEWATER

#130
20110275878
2011-11-10

Method for the degradation of pollutants in water and/or soil

#131
20110275141
2011-11-10

ANAERBOIC DIGESTER AND A METHOD FOR TREATING SLUDGE IN THE DIGESTOR

#132
20110253624
2011-10-20

ANAEROBIC DIGESTER-MEMBRANE BIOREACTOR FOR TREATING A WASTE STREAM

#133
20110152149
2011-06-23

Septic system cleaning compositions

#134
20110136213
2011-06-09

Three stage, multiple phase anaerobic digestion system and method

#135
20110062080
2011-03-17

Bio-denitrification apparatus and method for making and using same

#136
20110005284
2011-01-13

Wastewater treatment system including irradiation of primary solids

#137
20100314310
2010-12-16

ANAEROBIC DIGESTION PROCESS AND APPARATUS

#138
20100282674
2010-11-11

Phosphate recovery from acid phase anaerobic digesters

#139
20100264084
2010-10-21

Apparatus for water treatment and method of treating water

#140
20100206791
2010-08-19

Apartment-shaped anaerobic digester for producing biogas

#141
20100196981
2010-08-05

Methods and systems for feedstock production from sewage and product manufacturing therefrom

#142
20100155327
2010-06-24

System for enhancing a wastewater treatment process

#143
20100140169
2010-06-10

Method and apparatus for anaerobic digestion of organic liquid waste streams

#144
20100133178
2010-06-03

Septic system cleaning method

#145
20100084337
2010-04-08

Apparatus and methods for control of waste treatment processes

#146
20100078512
2010-04-01

Apparatus for processing utility waste with biodegradable organic material content

#147
20100065505
2010-03-18

Apparatus and method for removal of ammonia from a medium

#148
20100044306
2010-02-25

Method and apparatus using hydrogen peroxide and microwave system for slurries treatment

#149
20100038310
2010-02-18

Waste water treatment method

#150
20100032370
2010-02-11

Anaerobic digester design and operation

#151
20100032369
2010-02-11

SEWAGE PURIFICATION PLANT AND PROCESS THEREOF

#152
20100025325
2010-02-04

System and method for the renovation of process water

#153
20100015689
2010-01-21

Method For Composting And Treating Food Waste By Using Wood Chips And Apparatus Therefor

#154
20100012581
2010-01-21

DENITRIFICATION TREATMENT SYSTEM AND METHOD

#155
20100012557
2010-01-21

SEPTIC TANK WASTEWATER TREATMENT SYSTEM

#156
20100006489
2010-01-14

Wastewater flow diverter

#157
20090325253
2009-12-31

METHODS AND SYSTEMS FOR PRODUCTION OF BIOFUELS AND BIOENERGY PRODUCTS FROM SEWAGE SLUDGE, INCLUDING RECALCITRANT SLUDGE

#158
20090314709
2009-12-24

Polar fog waste treatment

#159
20090305377
2009-12-10

Process and device for continuous liquefaction of organic solids

#160
20090301963
2009-12-10

Method and system for treating water and utilizing a membrane filtering system

#161
20090294355
2009-12-03

Method and apparatus for the anaerobic treatment of waste water

#162
20090289007
2009-11-26

Method for the treatment of waste water from florfenicol production

#163
20090255869
2009-10-15

Combined anaerobic process apparatus for treating organic wastes

#164
20090233341
2009-09-17

PROCESS FOR PRODUCING BIOGAS

#165
20090218280
2009-09-03

Wastewater Treatment Method and System

#166
20090206028
2009-08-20

Combined nutrient recovery and biogas scrubbing system integrated in series with animal manure anaerobic digester

#167
20090166280
2009-07-02

WASTEWATER PURIFYING SYSTEM IN HOSPITALS

#168
20090145852
2009-06-11

HEATING SYSTEM AND METHOD FOR PREVENTION OF UNDERGROUND TANK FREEZE-UPS

#169
20090142627
2009-06-04

Biological Power Generator, and Method of Treating Organic Solid Pollutant-Containing Waste, a Method of Treating Organic Polymeric Substance-Containing Wastewater, a Method of Treating Organic Substance-Containing Wastewater, as Well as Apparatuses for Implementing These Treatment Methods

#170
20090114594
2009-05-07

Pervaporation membranes highly selective for volatile solvents present in fermentation broths

#171
20090100787
2009-04-23

Systems and Methods for Ballasting Covers for Gas-Holding Sludge Digestors

#172
20090071900
2009-03-19

Submerged fixed film anoxic bioreactor

#173
20090032464
2009-02-05

Treatment equipment of organic waste and treatment method

#174
20090008338
2009-01-08

Septic tanks

#175
20080314824
2008-12-25

Method for decomposing biogenic material

#176
20080302722
2008-12-11

Removal of ammonia from fermentation effluent and sequestration as ammonium bicarbonate and/or carbonate

#177
20080283468
2008-11-20

Method, composition and apparatus for high temperature production of methane from poultry waste

#178
20080264861
2008-10-30

Septic system cleaning

#179
20080263956
2008-10-30

Process and apparatus for low-emission storage of biodegradable matter

#180
20080203014
2008-08-28

Integrated cogeneration wastewater sewage and waste polar fats/ oils/ greases/waxes (FOG) waste treatment method and facility

#181
20080124775
2008-05-29

Method for increased production of biogas

#182
20080110825
2008-05-15

Method for treating wastewater and sludge

#183
20080050801
2008-02-28

Methods and systems for biological treatment of flue gas desulfurization wastewater

#184
20080038184
2008-02-14

Process and apparatus for the production of sulphur oxides

#185
20080023387
2008-01-31

Reciprocating biological contactor and method of use

#186
20070292210
2007-12-20

Septic system

#187
20070209997
2007-09-13

Continuous flow biosolids stabilization

#188
20070190630
2007-08-16

Process for producing biogas

#189
20070163956
2007-07-19

Process for reducing waste volume

#190
20070158264
2007-07-12

Anaerobic phased solids digester for biogas production from organic solid wastes

#191
20070151909
2007-07-05

Separating device

#192
20070122874
2007-05-31

Novel microbial consortium and use thereof for liquefaction of solid organic matter

#193
20070114173
2007-05-24

Method and apparatus for solids processing

#194
20070102354
2007-05-10

SYSTEM FOR TREATING WASTEWATER AND A MEDIA USABLE THEREIN

#195
20070095734
2007-05-03

Apparatus for the treatment of particulate biodegradable organic waste

#196
20070071556
2007-03-29

Septic system

#197
20070071555
2007-03-29

Septic system

#198
20070062868
2007-03-22

Method and system for filtration of wastewater

#199
20070062866
2007-03-22

Two-stage anaerobic digester

#200
20070051677
2007-03-08

Screening of inert solids from a low-yield wastewater treatment process

#201
20070017865
2007-01-25

Method and apparatus for utilization of recovered magnesium ammonium phosphate

#202
20070000825
2007-01-04

Process and apparatus for microbial filtration and bacterial injection for one or more environmental contaminants

#203
20060292684
2006-12-28

Method and system for treating oxidized contaminant-containing matrix

#204
20060231488
2006-10-19

Tubular anaerobic digester

#205
20060201877
2006-09-14

Septic system cleaning

#206
20060194303
2006-08-31

Wastewater treatment compositions

#207
20060175252
2006-08-10

Two phase anaerobic contact sequencing batch reactor (ACSBR) system for treating wastewater containing simple and complex organic constituents

#208
20060169637
2006-08-03

Method and apparatus for treating sludge, and method and apparatus for treating wastewater utilizing the same

#209
20060151388
2006-07-13

Method of sludge recycling

#210
20060124540
2006-06-15

Integrated hydroponic and wetland wastewater treatment systems and associated methods

#211
20060102535
2006-05-18

Method of sludge recycling

#212
20060099697
2006-05-11

Anaerobic fermenter

#213
20060076292
2006-04-13

Organic disposer and method of controlling the same

#214
20060060526
2006-03-23

Method and apparatus for anaerobic digestion of biomasses and generation of biogas

#215
20060027497
2006-02-09

Method of sludge recycling

#216
20060021935
2006-02-02

Circulating sewage/waste water purification device

#217
20060000769
2006-01-05

Apparatus and methods for control of waste treatment processes

#218
20060000768
2006-01-05

Apparatus and methods for control of waste treatment processes

#219
20050279705
2005-12-22

Apparatus and methods for control of waste treatment processes

#220
20050279704
2005-12-22

Apparatus and methods for control of waste treatment processes

#221
20050274668
2005-12-15

Method and apparatus for the treatment of particulate biodegradable organic waste

#222
20050258094
2005-11-24

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

#223
20050239189
2005-10-27

Oxidant-scavenging compound for anaerobic treatment

#224
20050184000
2005-08-25

Wastewater treatment station in shipping container

#225
20050145563
2005-07-07

Process and apparatus for waste water treatment

#226
20050130290
2005-06-16

Organic waste material treatment system

#227
20050126991
2005-06-16

Integrated hydroponic and fixed-film wastewater treatment systems and associated methods

#228
20050098497
2005-05-12

Pulsating reactors

#229
20050082223
2005-04-21

Waste treatment with control over biological solids

#230
20050077236
2005-04-14

Incubation treatment of sludge for pathogen reduction prior to digestion

#231
20050040114
2005-02-24

Heating system and method for prevention of septic system freeze-up

#232
20050035059
2005-02-17

Treatment of swine wastewater by biological and membrane separation technologies

#233
20050028680
2005-02-10

Biosolids pasteurization systems and methods

#234
20050011829
2005-01-20

Bionest reactor for the application of anaerobic wastewater treatment and bioenergy recovery

#235
17858301
2025-05-27

System and method for wastewater treatment

#236
17732215
2025-04-01

Wastewater treatment system

#237
15331500
2019-05-21

Method for digesting organic matter using a biodigesting apparatus comprising an angled digestion tank