ClassID:

86401

C02F3/308 - CPC Classification

Classification description:

Biological treatment of water, waste water, or sewage; Aerobic and anaerobic processes Biological phosphorus removal

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

SYSTEM AND METHOD FOR REMOVAL OF PHOSPHORUS FROM A WATER SOURCE

#2
20260042689
2026-02-12

ASSEMBLED BIORETENTION POND WITH NITROGEN AND PHOSPHORUS REMOVAL FUNCTIONS

#3
20250197260
2025-06-19

PHOSPHORUS-CONTAINING WATER TREATMENT METHOD AND PHOSPHORUS-CONTAINING WATER TREATMENT DEVICE

#4
20250197248
2025-06-19

WATER TREATMENT SYSTEM

#5
20250074802
2025-03-06

WASTEWATER TREATMENT SYSTEM USING AMINO ACID FERMENTATION MICROORGANISMS

#6
20250002386
2025-01-02

MEMBRANE BIOREACTOR SYSTEM FOR TREATING WASTEWATER USING OXYGEN

#7
20240351926
2024-10-24

NUTRIENTS REMOVAL VIA SIMULTANEOUS NITRIFICATION AND DENITRIFICATION COUPLING WITH PHOSPHATE ACCUMULATION

#8
20240327263
2024-10-03

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

#9
20240286939
2024-08-29

ADVANCED GRANULAR SLUDGE BED REACTOR

#10
20240262728
2024-08-08

INCLINED PLATE BAFFLED A2O REACTOR WITH HIGH OXYGEN TRANSFER EFFICIENCY

#11
20240191178
2024-06-13

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

#12
20240182345
2024-06-06

METHODS AND SYSTEMS FOR DIGESTING BIOSOLIDS AND RECOVERING PHOSPHORUS

#13
20240092664
2024-03-21

STRAIGHT-LINE SEWAGE TREATMENT SYSTEM FOR ENHANCED TREATMENT OF LOW C/N DOMESTIC SEWAGE

#14
20240083793
2024-03-14

METHOD FOR RECOVERY OF BIOLOGICAL PHOSPHORUS FROM AN ACTIVATED SLUDGE WASTEWATER TREATMENT PROCESS

#15
20240083792
2024-03-14

System and method for recovering nutrients from a high nitrogenous liquid waste

#16
20240083791
2024-03-14

System and method for recovering nutrients from a high nitrogenous liquid waste

#17
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

#18
20240059597
2024-02-22

ANAEROBIC AMMONIA OXIDATION TREATMENT SYSTEM FOR TREATING WASTEWATER WITH HIGH AMMONIA NITROGEN AND HIGH COD

#19
20240043297
2024-02-08

BIO-ELECTROCHEMICAL SENSOR, SYSTEM AND METHOD FOR MONITORING AND CONTROLLING ORGANIC CARBON LEVELS IN A WASTEWATER TREATMENT PROCESS

#20
20240018027
2024-01-18

METHODS FOR ENHANCED BIOLOGICAL PHOSPHORUS REMOVAL

#21
20230373829
2023-11-23

METHOD FOR TREATING A WASTEWATER EFFLUENT BY DENSIFYING SLUDGE IN A SEQUENCING BATCH REACTOR

#22
20230331609
2023-10-19

System and method for realizing partial anammox advanced nitrogen and phosphorus removal through mainstream and sidestream biofilm cyclic alternating for municipal wastewater treatment plant

#23
20230312382
2023-10-05

SYSTEM AND METHOD FOR EFFICIENT NITROGEN AND CARBON REMOVAL AND PHOSPHORUS RECOVERY OF SOURCE-SEPARATED FRESH URINE BY BIOCHEMICAL COMBINATION

#24
20230271864
2023-08-31

PROCESS FOR ENRICHING PHOSPHORUS AND RECOVERING BLUE IRON ORE BY USING BIOFILM METHOD

#25
20230242427
2023-08-03

METHOD FOR PHOSPHORUS REMOVAL AND RECOVERY USING ORGANIC CARBON SOURCE OF URBAN SEWAGE

#26
20230202893
2023-06-29

Low-carbon nitrogen and phosphorus removal system and process for sewage treatment

#27
20230114714
2023-04-13

Apparatus and method for advanced nitrogen and phosphorus removal of domestic sewage based on DEAMOX in AOAO process with sludge double-reflux

#28
20230048932
2023-02-16

System and method for recovering nutrients from a high nitrogenous liquid waste

#29
20230024100
2023-01-26

INTEGRATED DUAL CIRCULATION OXIDIZATION DITCH APPARATUS FOR MUNICIPAL WASTEWATER AND TREATMENT METHOD

#30
20220380240
2022-12-01

sp. SJB007 and application thereof in removal of phosphorus from wastewater

#31
20220298042
2022-09-22

Efficient self-circulation biological denitrification device and working method therefor

#32
20220259084
2022-08-18

Biological phosphorus and nitrogen removal in activated sludge processing

#33
20220212973
2022-07-07

Dissolved air flotation system and methods for biological nutrient removal

#34
20220161189
2022-05-26

MICROORGANISM DEODORIZING DEVICE AND DEODORIZATION TREATMENT SYSTEM

#35
20220153617
2022-05-19

Dynamic membrane reactor with function of nitrogen and phosphorus removal and operation method thereof

#36
20220144678
2022-05-12

Method for removing nitrogen and phosphorus from sewage and wastewater through combination of biological nitrogen and phosphorus removal process using nitrite nitrogen and anaerobic ammonium oxidation process (anammox)

#37
20220119292
2022-04-21

Method for removing nitrogen and phosphorus from sewage and wastewater through improvement of reaction tank shape and return method in existing biological nitrogen and phosphorus removal process and combination with anaerobic ammonium oxidation process (anammox)

#38
20220073391
2022-03-10

Methods and systems for digesting biosolids and recovering phosphorus

#39
20220017394
2022-01-20

Device for advanced nitrogen and phosphorus removal in sewage treatment

#40
20220017393
2022-01-20

Method for advanced nitrogen and phosphorus removal in sewage treatment

#41
20220017392
2022-01-20

Water treatment method for simultaneous abatement of carbon, nitrogen and phosphorus, implemented in a sequencing batch moving bed biofilm reactor

#42
20210403356
2021-12-30

Bacterium-alga coupled sewage treatment device based on energy recycling and use method thereof

#43
20210403353
2021-12-30

Method for high efficiency biological phosphorus and nitrogen removal in a sequencing batch reactor activated sludge process

#44
20210387881
2021-12-16

Rural landscape-type nitrogen and phosphorus ecological interception ditch system and farmland drainage nitrogen and phosphorus interception method using the same

#45
20210355012
2021-11-18

Mainstream deammonification process employing bypass primary effluent and step feeding

#46
20210355010
2021-11-18

Aerobic granular sludge in continuous flow reactors

#47
20210354072
2021-11-18

Apparatus and method for recovering effective resources including nitrogen and phosphorus

#48
20210331950
2021-10-28

METHOD AND ASSEMBLY FOR RECOVERING MAGNESIUM AMMONIUM PHOSPHATE

#49
20210238074
2021-08-05

METHOD FOR OPERATING A WASTEWATER TREATMENT PLANT FOR PHOSPHORUS TREATMENT OF EFFLUENT

#50
20210198132
2021-07-01

METHODS AND APPARATUSES FOR WATER, WASTEWATER, AND WASTE TREATMENT

#51
20210188677
2021-06-24

Method and device for preventing and controlling pollutants in the reuse of reclaimed water in agricultural activity areas with extreme water shortage

#52
20210179465
2021-06-17

Method and device for controlling pollutants in basin water resources cycling utilization in agricultural activity areas

#53
20210171380
2021-06-10

Method and device for controlling pollutants in metal mine water resources cycling utilization

#54
20210171379
2021-06-10

Method and device for preventing and controlling pollutants in basin water resource utilization

#55
20210107819
2021-04-15

Tower-shape integrated ecological purification device for domestic sewage in small town

#56
20210070642
2021-03-11

Ballasted Activated Sludge Treatment Combined with High-Rate Liquids/Solids Separation Systems

#57
20210047218
2021-02-18

Dissolved air flotation system and methods for biological nutrient removal

#58
20210039972
2021-02-11

CONTROL SYSTEM AND CONTROL METHOD

#59
20210032133
2021-02-04

Method and assembly for recovering magnesium ammonium phosphate

#60
20200392027
2020-12-17

Method and device for controlling pollutants in basin water used for irrigating farmland in extremely water-scarce areas

#61
20200346958
2020-11-05

Reactor and method for biological treatment of wastewater

#62
20200325050
2020-10-15

Method and Device for Biological Waste Water Purification

#63
20200299160
2020-09-24

Wastewater treatment apparatus to achieve class B biosolids using chlorine dioxide

#64
20200299157
2020-09-24

Coagulant composition for wastewater treatment

#65
20200283314
2020-09-10

Bio-electrochemical sensor, system and method for monitoring and controlling organic carbon levels in a wastewater treatment process

#66
20200216344
2020-07-09

Phosphorus release reactor for water treatment

#67
20200156975
2020-05-21

METHOD OF UPGRADING THE ACTIVATED SLUDGE PROCESS BASED ON FUNCTIONAL SUSPENDED CARRIERS IN THE WASTEWATER BIOLOGICAL TREATMENT PROCESS

#68
20200095146
2020-03-26

Method for a water treatment in a system comprising at least one sequencing batch reactor and a moving bed biofilm reactor

#69
20200079669
2020-03-12

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

#70
20200017387
2020-01-16

Outdoor apparatus and methods to treat wastes, wastewater and contaminated water bodies

#71
20200002202
2020-01-02

Controlling digester biosolids and wastewater activated sludge systems

#72
20200002201
2020-01-02

Continuous flow wastewater treatment system

#73
20190389753
2019-12-26

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

#74
20190248688
2019-08-15

METHOD OF TREATING WASTEWATER AND SYSTEMS THEREOF

#75
20190185357
2019-06-20

Process and facility for recovering phosphorus at a wastewater treatment plant with advanced sludge treatment

#76
20190185355
2019-06-20

Phosphorus release reactor for water treatment

#77
20190106342
2019-04-11

ALTERNATIVE CARBON SOURCES FOR THE CONTROL OF NITROGEN CONCENTRATION IN WATER

#78
20190100452
2019-04-04

Biological removal of micropollutants from wastewater

#79
20190092666
2019-03-28

Sewage treatment system using granule

#80
20190092665
2019-03-28

Flow equalization reactor having multiple wastewater treatment zones

#81
20190071335
2019-03-07

HIGHLY EFFICIENT AEROBIC PHOSPHORUS-REMOVING BACTERIA CAPABLE OF SYNTHESIZING NANOPARTICLES BY MICROBIAL SELF-ASSEMBLY USING WASTE WATER

#82
20190039932
2019-02-07

Process For Treating Wastewater

#83
20190010066
2019-01-10

DECENTRALIZED WASTEWATER TREATMENT SYSTEM FOR REMOVING PHOSPHOROUS

#84
20180371739
2018-12-27

Total suspended solids reduction system

#85
20180354830
2018-12-13

Method of using microbial DNA sequencing in recovering renewable resources from wastewater and other waste streams

#86
20180280907
2018-10-04

Light particle or mixed particle system for wastewater treatment

#87
20180164272
2018-06-14

Measuring phosphorus in wastewater using a self-organizing RBF neural network

#88
20180127292
2018-05-10

Systems and methods for formation of biologically active granules and biologically active granules

#89
20180118594
2018-05-03

Biological nutrient removal process control system

#90
20180118593
2018-05-03

Method for biological wastewater purification

#91
20180117534
2018-05-03

Membrane bioreactor system using reciprocating membrane

#92
20180111863
2018-04-26

Systems and methods for reducing algae blooms and microbial growth by phosphorus removal from aqueous systems

#93
20180099886
2018-04-12

Method for biological wastewater purification with phosphorous removal

#94
20180044213
2018-02-15

Method for treating organic wastewater and organic wastewater treating system

#95
20180029914
2018-02-01

Removal and recovery of phosphate from liquid streams

#96
20180009690
2018-01-11

Flow equalization reactor having multiple wastewater treatment zones

#97
20170313607
2017-11-02

Water treatment system and method

#98
20170297937
2017-10-19

METHOD FOR MANAGING A WASTEWATER TREATMENT PROCESS

#99
20170275193
2017-09-28

High efficiency wastewater treatment system

#100
20170253513
2017-09-07

METHOD AND SYSTEM FOR WASTEWATER TREATMENT USING MEMBRANE BIOREACTOR

#101
20170158534
2017-06-08

Method for biological purification of waste water

#102
20170121197
2017-05-04

Biological Phosphorus Removal from Wastewater

#103
20170081222
2017-03-23

Method for clarification of wastewater

#104
20160376181
2016-12-29

In-situ purification island structure and the construction method thereof

#105
20160376178
2016-12-29

Vertical sewage treatment device and method

#106
20160369261
2016-12-22

NOVEL BIOCATALYST COMPOSITIONS AND PROCESSES FOR USE

#107
20160304370
2016-10-20

Methods and apparatuses for water, wastewater, and waste treatment

#108
20160304369
2016-10-20

METHOD FOR BIOLOGICAL PURIFICATION OF WATER

#109
20160279584
2016-09-29

Device and method thereof for re-aeration of wetlands

#110
20160272519
2016-09-22

Control system for nitrogen and phosphorus removal

#111
20160251248
2016-09-01

Removal and recovery of phosphate from liquid streams

#112
20160251247
2016-09-01

Sulphur cycle-associated denitrifying enhanced biological phosphorus removal (SD-EBPR) utilizing sulphur compounds as electron carriers for biological nutrient removal of wastewater treatment

#113
20160236957
2016-08-18

Membrane Enhancement for Wastewater Treatment

#114
20160102004
2016-04-14

Water cleaning system, water cleaning method, startup method for water cleaning system, and water cleaning unit

#115
20160096755
2016-04-07

METHOD OF BIOLOGICAL WASTEWATER TREATMENT

#116
20160023935
2016-01-28

Treatment of municipal wastewater with anaerobic digestion

#117
20150376043
2015-12-31

Method and apparatus for wastewater treatment using external selection

#118
20150360983
2015-12-17

WATER REUSE SYSTEM AND METHOD

#119
20150353397
2015-12-10

WATER REUSE SYSTEM AND METHOD

#120
20150336830
2015-11-26

Removal and recovery of phosphate from liquid streams

#121
20150336828
2015-11-26

Method for improving quality of aquaculture pond water

#122
20150284279
2015-10-08

Installation and method for wastewater treatment

#123
20150272090
2015-10-01

IN-TANK FILTER MEDIA REACTOR

#124
20150210577
2015-07-30

Process for reducing the production of sludge by municipal or industrial wastewater purification plants, and equipment for the implementation thereof

#125
20150202573
2015-07-23

Membrane filter cleaning apparatus for waste-water treatment process

#126
20150191715
2015-07-09

Water treatment processes using biocatalysts

#127
20150129492
2015-05-14

Membrane system and method for treating sewage and wastewater capable of automated removal/destruction of scum/foam with high energy efficiency, high flux and low operation costs and haying process conversion method from constant level continuous batch reactor process

#128
20150068976
2015-03-12

PROCESS FOR TREATING AN EFFLUENT FOR THE PURPOSE OF BRINGING DOWN THE PHOSPHATE CONTENT THEREOF, COMPRISING A STEP OF OPTIMIZED WET HEAT TREATMENT, AND CORRESPONDING EQUIPMENT

#129
20150053613
2015-02-26

Activated sludge treatment method, and method for upgrading existing waste water treatment equipment using said method

#130
20150048012
2015-02-19

Bioreactor

#131
20140346109
2014-11-27

Simultaneous treatment of ammonia and phosphorus in a vertical reactor

#132
20140319055
2014-10-30

Using continuous nitrate measurement to control aeration in an aerated-anoxic process

#133
20140319053
2014-10-30

Method and a system for out-competing glycogen-accumulating organisms in a substance

#134
20140291239
2014-10-02

Wastewater treatment method and equipment using a dual-diffusion oxygen supply horizontal-flow biofilm

#135
20140263042
2014-09-18

Simultaneous anoxic biological phosphorus and nitrogen removal

#136
20140262999
2014-09-18

Reactor for sewage treatment

#137
20140217015
2014-08-07

Use of primary sludge for carbon source in an aerated-anoxic bioreactor system

#138
20140197097
2014-07-17

Simultaneous anoxic biological phosphorus and nitrogen removal with energy recovery

#139
20140158614
2014-06-12

Apparatus for water, wastewater, and waste treatment

#140
20140138308
2014-05-22

Optimized process and aeration performance with an advanced control algorithm

#141
20140116939
2014-05-01

Method for wastewater treatment by urine separation, seawater addition, and nitrification and in-sewer denitrification

#142
20140097132
2014-04-10

Membrane bioreactor system using reciprocating membrane

#143
20140076800
2014-03-20

High efficiency wastewater treatment system

#144
20140034573
2014-02-06

Hybrid aerobic and anaerobic wastewater and sludge treatment systems and methods

#145
20130337518
2013-12-19

Biocatalyst compositions and processes for their use

#146
20130327710
2013-12-12

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

#147
20130327709
2013-12-12

Method and system for treating wastewater and sludges by optimizing sCOfor anaerobic autotrophic microbes

#148
20130319936
2013-12-05

Method for the biological treatment of wastewater using an aerobic granular biomass

#149
20130292330
2013-11-07

Ultrapure water producing method and apparatus

#150
20130233794
2013-09-12

METHOD FOR TREATING WASTEWATER WITH BACTERIA-LOADED LIGNOCELLUOSIC MATERIAL

#151
20130233792
2013-09-12

METHOD FOR TREATING WASTEWATER WITH LIGNOCELLUOSIC PARTICULATE

#152
20130213883
2013-08-22

Treatment of municipal wastewater with anaerobic digestion

#153
20130134092
2013-05-30

Wastewater treatment apparatus to achieve class B biosolids using chlorine dioxide

#154
20130048558
2013-02-28

WATER TREATMENT METHOD AND ULTRAPURE WATER PRODUCING METHOD

#155
20130020257
2013-01-24

Mainstream Wastewater Treatment

#156
20130015124
2013-01-17

Apparatus and method for alternative aeration-effluent wastewater treatment using ceramic membrane

#157
20120285878
2012-11-15

Advanced treatment system of wastewater having plasma discharging vessel

#158
20120264180
2012-10-18

Process for the biologic treatment of organic wastes and plant therefor

#159
20120187042
2012-07-26

Method of biological phosphorus removal with maximum nitrogen removal in wastewater

#160
20120181229
2012-07-19

Method of treating a plant wastewater and treatment system therefor

#161
20120152832
2012-06-21

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

#162
20120152812
2012-06-21

Wastewater treatment system to reduce sludge generation

#163
20120067817
2012-03-22

Simultaneous anoxic biological phosphorus and nitrogen removal with energy recovery

#164
20120067816
2012-03-22

Simultaneous anoxic biological phosphorus and nitrogen removal

#165
20120067800
2012-03-22

System and method for sewage and wastewater treatment

#166
20120067796
2012-03-22

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

#167
20120031836
2012-02-09

Compact upright bioreactor for the elimination of nutrients

#168
20120018374
2012-01-26

Sewage treatment process and system

#169
20120012524
2012-01-19

Membrane bioreactor process

#170
20110284461
2011-11-24

Controlled aeration of integrated fixed-film activated sludge bioreactor systems for the treatment of wastewater

#171
20110168617
2011-07-14

Advanced wastewater treatment device having movable dividers

#172
20110132837
2011-06-09

Method and system for treating wastewater

#173
20110132836
2011-06-09

Systems and methods for nutrient removal in biological treatment systems

#174
20110129900
2011-06-02

Low oxygen biologically mediated nutrient removal

#175
20110089105
2011-04-21

Hybrid aerobic and anaerobic wastewater and sludge treatment systems and methods

#176
20110068058
2011-03-24

APPARATUS AND PROCESS FOR TREATING WASTEWATER

#177
20100288698
2010-11-18

METHOD FOR REMOVING PHOSPHORUS USING MEMBRANE BIOREACTOR

#178
20100288697
2010-11-18

Method for forming facultative-organism-adapted membrane bioreactor

#179
20100282653
2010-11-11

Versatile biological wastewater treatment system

#180
20100276363
2010-11-04

Wastewater treatment process and plant comprising controlling the dissolved oxygen concentration

#181
20100264083
2010-10-21

METHOD AND APPARATUS FOR TREATING WASTE ACTIVATED SLUDGE

#182
20100200481
2010-08-12

Membrane filter unit

#183
20100133177
2010-06-03

Biological phosphorus removal

#184
20100133158
2010-06-03

Liquid-solid circulating fluidized bed waste water treatment system for simultaneous carbon, nitrogen and phosphorus removal

#185
20100101995
2010-04-29

Advanced wastewater treatment process using up and down aerobic/anaerobic reactors of channel type

#186
20100062933
2010-03-11

Functionalized green filtration media for passive underground drainfield for septic tank nutrient removal

#187
20100059438
2010-03-11

Vertical-horizontal filter unit for the biological purification of polluted water

#188
20100059437
2010-03-11

Passive underground drainfield for septic tank nutrient removal using functionalized green filtration media

#189
20100044306
2010-02-25

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

#190
20090305386
2009-12-10

Micro-electron acceptor phosphorus accumulating organisms

#191
20090301963
2009-12-10

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

#192
20090218280
2009-09-03

Wastewater Treatment Method and System

#193
20090173679
2009-07-09

Apparatus for biological removal of phosphorus and nitrogen using granulated methane-oxidizing bacteria

#194
20090139928
2009-06-04

Method and apparatus for biologically processing fluid

#195
20090090670
2009-04-09

WASTEWATER TREATMENT SYSTEM AND METHOD

#196
20090001016
2009-01-01

Apparatus for treating sewage using a semi-batch process and associated method

#197
20080314841
2008-12-25

Sewage treatment control device, method, and sewage treatment system

#198
20080314829
2008-12-25

Dynamic control of membrane bioreactor system

#199
20080251439
2008-10-16

Methods and Apparatus For Biological Treatment of Waste Waters

#200
20080116130
2008-05-22

Methods and apparatus for treating wastewater employing a high rate clarifier and a membrane

#201
20080053897
2008-03-06

Liquid-solid fluidized bed waste water treatment system for simultaneous carbon, nitrogen and phosphorous removal

#202
20080041783
2008-02-21

Process to improve the efficiency of a membrane filter activated sludge system

#203
20070284305
2007-12-13

Biological method for removing phosphorus and nitrogen from water using granulated methane-oxidizing bacteria

#204
20070267345
2007-11-22

Water treatment system

#205
20070235386
2007-10-11

Process to improve the efficiency of a membrane filter activated sludge system

#206
20070193949
2007-08-23

System and method for treating carbon, nitrogen, phosphorous containing wastewater

#207
20070187324
2007-08-16

Process for improving phosphorus removal in waste water treatment without chemical addition

#208
20070176890
2007-08-02

Method and apparatus for the biological activated sludge treatment of wastewater

#209
20070170112
2007-07-26

Wastewater treatment system and method

#210
20070144965
2007-06-28

Low oxygen biologically mediated nutrient removal

#211
20070045181
2007-03-01

System for treating wastewater

#212
20070045180
2007-03-01

System for treating wastewater

#213
20070029240
2007-02-08

Phased activated sludge system

#214
20060249449
2006-11-09

Treatment of wastewater containing phosphorous and nitrogen

#215
20060243664
2006-11-02

Methods for biological treatment of waste waters

#216
20060231489
2006-10-19

Apparatus and method for performing tertiary treatment of sewage based on porous filtering media

#217
20060169636
2006-08-03

Methods and apparatus for treating wastewater employing a high rate clarifier and a membrane

#218
20060151387
2006-07-13

Multiple soil-layering system for wastewater purification

#219
20060131232
2006-06-22

Method for water purification

#220
20060124540
2006-06-15

Integrated hydroponic and wetland wastewater treatment systems and associated methods

#221
20060113243
2006-06-01

Wastewater treatment control

#222
20060049103
2006-03-09

Phased activated sludge system

#223
20060032815
2006-02-16

Method for the treatment of waste water with sludge granules

#224
20050242026
2005-11-03

Low oxygen biologically mediated nutrient removal

#225
20050205490
2005-09-22

Municipal wastewater treatment apparatus and process with a continuous feed and cyclic aeration

#226
20050189295
2005-09-01

Process for improving phosphorous removal in waste water treatment without chemical addition

#227
20050133443
2005-06-23

Wastewater treatment control

#228
20050115880
2005-06-02

Apparatus for biological treatment of waste waters

#229
20050087480
2005-04-28

Wastewater treatment apparatus and method for removing nitrogen and phosphorus

#230
20050072718
2005-04-07

System and device to treat sanitary and municipal wastewater and storm water run-offs

#231
20050061739
2005-03-24

Activated sludge process using downflow sludge blanket filtration

#232
20050061737
2005-03-24

Integrated closed loop system for industrial water purification

#233
20050040107
2005-02-24

Single vessel multi-zone wastewater bio-treatment system

#234
20050016920
2005-01-27

Chemically enhanced primary sludge fermentation method

#235
17817344
2023-04-04

Recycling purification and reuse system for farmland tail water

#236
13998841
2016-11-01

Device and process to treat and disinfect sewage, food processing wastewater and other biologically contaminated water