CN105129985A - Biochemical pool inlet water distribution system - Google Patents

Biochemical pool inlet water distribution system Download PDF

Info

Publication number
CN105129985A
CN105129985A CN201510518873.6A CN201510518873A CN105129985A CN 105129985 A CN105129985 A CN 105129985A CN 201510518873 A CN201510518873 A CN 201510518873A CN 105129985 A CN105129985 A CN 105129985A
Authority
CN
China
Prior art keywords
water inlet
reaction tank
overflow weir
height
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201510518873.6A
Other languages
Chinese (zh)
Other versions
CN105129985B (en
Inventor
周丽颖
李星文
杨大蔚
仲崇川
袁琳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZIGUANG ENVIRONMENTAL PROTECTION CO Ltd
Thunip Holdings Co Ltd
Original Assignee
ZIGUANG ENVIRONMENTAL PROTECTION CO Ltd
Thunip Holdings Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZIGUANG ENVIRONMENTAL PROTECTION CO Ltd, Thunip Holdings Co Ltd filed Critical ZIGUANG ENVIRONMENTAL PROTECTION CO Ltd
Priority to CN201510518873.6A priority Critical patent/CN105129985B/en
Publication of CN105129985A publication Critical patent/CN105129985A/en
Application granted granted Critical
Publication of CN105129985B publication Critical patent/CN105129985B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention relates to the field of sewage treatment, and discloses a biochemical pool inlet water distribution system. The system comprises a water inlet tube, a first reaction pool, a second reaction pool, an inlet water buffer tank, an overflow weir, an inlet water distribution tank and a water inlet channel, the water inlet tube is connected to the inlet water buffer tank, the overflow weir is arranged at the outlet of the inlet water buffer tank, the inlet water distribution tank is arranged between the overflow weir and the outer wall of the first reaction pool, the inlet water distribution tank comprises two side walls arranged in parallel, a plurality of groups of opposite vertical chutes are arranged between the two side walls, a sliding separator plate is arranged in one of the groups of the opposite vertical chutes, the sliding separator plate divides the inlet water distribution tank into a first water inlet zone and a second water inlet zone, the first reaction pool is communicated with the first water inlet zone, the water inlet channel is arranged along the same side of the first reaction pool and the second reaction pool, and the water inlet channel is communicated with the second water inlet zone and the second reaction pool. The system has the advantages of convenient adjustment, accurate metering, and realization of the effective blending of inlet water and a carbon source in the anoxic and anaerobic segments.

Description

A kind of biochemistry pool water inlet distribution system
Technical field
The present invention relates to technical field of sewage, particularly relate to a kind of AAO biochemistry pool water inlet distribution system.
Background technology
At present, anaerobic-anoxic-oxic (AAO) technique is a kind of biochemical processing process of stable intensified denitrification and dephosphorization, and by rational adjustment, water outlet can reach country's " urban wastewater treatment firm pollutant emission standard " one-level A standard.
The biochemical reaction tank of tradition anaerobic-anoxic-aerobic process is made up of anaerobism, anoxic and aerobic three sections.As depicted in figs. 1 and 2, first reaction tank 6 such as anaerobic pond is used for biological phosphate-eliminating, second reaction tank 7 such as anoxic pond is used for biological denitrificaion, anaerobism and anoxic section all need carbon source, tradition AAO technique all enters anaerobic pond into water by water inlet pipe 1, make anoxic pond carbon source not enough, develop a kind of multipoint water feeding AAO technique in recent years, make anaerobism, anoxic section can realize water inlet, but this kind of water inlet form has two kinds, one is that sewage is along channel 12, respectively to regulate the form of weir plate 13 to enter anaerobism and anoxic section, and by regulating the form of weir plate 13 height, cannot specifically measure the flow entering anaerobism and anoxic section, make troubles in process adjustments, and another kind of water intake mode is mounted valve on inlet channel, sewage is made to enter different ponds body by water inlet pipe 14, for metered flow then needs to install under meter 15 to regulate flooding quantity on pipeline, add on the one hand the cost of Large Diameter Pipeline tubing and adjustment type valve, under meter 15, under meter 15 pairs of installation lengths have requirement on the other hand, usually there is no enough space mounting under meters 15, cause metering inaccurate, make the AAO technique of multipoint water feeding cannot realize effective adjustment.
Summary of the invention
(1) technical problem that will solve
The object of this invention is to provide a kind of biochemistry pool water inlet distribution system, it is easy to adjust, accurate measurement, can realize the effective allotment of water-inlet carbon source in anoxic and anaerobism section, strengthen denitrogenation and phosphor-removing effect.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of biochemistry pool water inlet distribution system, comprise water inlet pipe, first reaction tank and the second reaction tank, described first reaction tank and the second reaction tank are disposed adjacent, the side of described first reaction tank is located at by described water inlet pipe, it also comprises into water dashpot, overflow weir, water inlet distribution trough and inlet channel, described water inlet pipe passes in described water inlet dashpot, described overflow weir is plugged in the exit of described water inlet dashpot, described water inlet distribution trough is located between the outer wall of described overflow weir and the outer wall of described first reaction tank, described water inlet distribution trough comprises the both sides body of wall be arranged in parallel, the vertical chute that many group positions are relative is provided with between the body of wall of described both sides, wherein be provided with traverse in vertical chute described in a group, described water inlet distribution trough is divided into the first inhalant region and the second inhalant region by described traverse, described first reaction tank is communicated with described first inhalant region, described inlet channel is arranged along the homonymy of described first reaction tank and the second reaction tank, and the initiating terminal of described inlet channel is communicated with described second inhalant region, the end of described inlet channel is communicated with described second reaction tank.
Wherein, the height of described overflow weir is lower than the cell wall height of described water inlet dashpot, and the height of described traverse exceeds the height of described overflow weir.
Further, the height of described overflow weir is lower than the cell wall height 35-45cm of described water inlet dashpot, and the height of described traverse exceeds the height 25-35cm of described overflow weir.
Wherein, the outer wall that the side body of wall of described water inlet distribution trough is close to described overflow weir is arranged, the height of described overflow weir and concordant with the body of wall height that it is close to.
Wherein, described first reaction tank is provided with water-in, and described water-in is communicated with described first inhalant region.
Wherein, the symmetrical center line of described water inlet dashpot overlaps with the symmetrical center line of described water inlet distribution trough.
Wherein, the surrounding of described traverse is provided with doorframe, and the width of described doorframe and the width of described vertical chute adapt, and described doorframe outward flange is provided with rubber water-proof bar.
Wherein, described traverse is made up of stainless material.
Wherein, the length of described overflow weir is 1-2m.
(3) beneficial effect
Compared with prior art, the present invention has the following advantages:
A kind of biochemistry pool water inlet distribution system provided by the invention, between the outer wall and the outer wall of the first reaction tank of overflow weir, water inlet distribution trough is set, described water inlet distribution trough comprises the both sides body of wall be arranged in parallel, the vertical chute that many group positions are relative is provided with between the body of wall of described both sides, wherein be provided with traverse in vertical chute described in a group, by being placed on by described traverse in the vertical chute of the difference group of water distribution trough, and realize regulating and distributing flow, easy to use; Structure of the present invention is simple, cost is low, does not need the facility such as adjustment type valve, under meter increasing large-scale pipeline and costliness, effectively can solve the problem that water inlet distributes.
According to the quantity regulating flow quantity assignment accuracy of vertical chute, range estimation assignment of traffic is very directly perceived, and metering easily.
By effectively regulating the flooding velocity flowing to each reaction tank, effective distribution of AAO technique differential responses pond water-inlet carbon source can be realized, improving Nitrogen/Phosphorus Removal.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the biochemistry pool water inlet system of prior art band water inlet regulating weir plate;
Fig. 2 is the schematic diagram that prior art brings the biochemistry pool water inlet system of water distribution pipe into;
Fig. 3 is the front view of a kind of biochemistry pool water inlet of the present invention distribution system;
Fig. 4 is the vertical view of a kind of biochemistry pool water inlet of the present invention distribution system.
In figure: 1: water inlet pipe; 2: overflow weir; 3: water inlet distribution trough; 4: vertical chute; 5: traverse; 6: the first reaction tanks; 7: the second reaction tanks; 8: inlet channel; 9: water-in; 10: water inlet dashpot; 11: body of wall; 12: channel; 13: regulate weir plate; 14: water inlet pipe; 15: under meter.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following instance for illustration of the present invention, but is not used for limiting the scope of the invention.
In describing the invention, it should be noted that, term " " center ", " longitudinal direction ", " transverse direction ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.In addition, term " first ", " second ", " the 3rd " etc. only for describing object, and can not be interpreted as instruction or hint relative importance.
In addition, in describing the invention, except as otherwise noted, the implication of " multiple ", " many ", " many groups " is two or more.
As shown in Figure 3 and Figure 4, for a kind of biochemistry pool water inlet distribution system provided by the invention, it comprises water inlet pipe 1, first reaction tank 6 and the second reaction tank 7, particularly, described first reaction tank 6 is anaerobic/anoxic pond, described second reaction tank 7 is hypoxic/anaerobic pond, described first reaction tank 6 and the second reaction tank 7 are disposed adjacent, the side of described first reaction tank 6 is located at by described water inlet pipe 1, it also comprises into water dashpot 10, overflow weir 2, water inlet distribution trough 3 and inlet channel 8, described water inlet pipe 1 passes in described water inlet dashpot 10, specifically sanitary sewage can be passed into, first described sanitary sewage flows into described water inlet dashpot 10 from described water inlet pipe 1, described overflow weir 2 is plugged in the exit of described water inlet dashpot 10, water in described water inlet dashpot 10 is overflowed from the top of described overflow weir 2, enter described water inlet distribution trough 3, described water inlet distribution trough 3 is located between the outer wall of described overflow weir 2 and the outer wall of described first reaction tank 6, described water inlet distribution trough 3 comprises the both sides body of wall 11 be arranged in parallel, the vertical chute 4 that many group positions are relative is provided with between described both sides body of wall 11, wherein be provided with traverse 5 in vertical chute 4 described in a group, described water inlet distribution trough 3 is divided into the first inhalant region and the second inhalant region by described traverse 5, described first reaction tank 6 is communicated with described first inhalant region, first reaction tank 6 described in the current direction of described first inhalant region, described inlet channel 8 is arranged along the homonymy of described first reaction tank 6 and the second reaction tank 7, and the initiating terminal of described inlet channel 8 is communicated with described second inhalant region, the end of described inlet channel 8 is communicated with described second reaction tank 7, the water of described second inhalant region flows in described second reaction tank 7 through described inlet channel 8.Traverse 5 is placed in the vertical chute 4 of different group, the i.e. adjustable water yield entering the first reaction tank 6 and the second reaction tank 7, as water inlet distribution trough 3 is divided into five parts, then traverse 5 is placed on when the first reaction tank 6 accounts for 1/5th place of whole water inlet distribution trough 3, the flooding quantity of 1/5th is then had to enter the first reaction tank 6, the flooding quantity of 4/5ths enters the second reaction tank 7, and range estimation flow is very convenient, and adjust flux is also very simple.By effectively regulating the flooding velocity flowing to each reaction tank, effective distribution of AAO technique differential responses pond water-inlet carbon source can be realized, improving Nitrogen/Phosphorus Removal.
In order to ensure that the water of intaking in dashpot 10 can overflow through described overflow weir 2 completely, the height of described overflow weir 2 should lower than the cell wall height of described water inlet dashpot 10, in order to ensure that the water overflowed from overflow weir 2 can be separated into two strands of current by described traverse 5, and can not overflow from the top of described traverse 5, the height of described traverse 5 should exceed the height of described overflow weir 2.
Further, the height of described overflow weir 2 is preferably lower than the cell wall height 35-45cm of described water inlet dashpot 10, and be preferably 40cm, the height of described traverse 5 exceeds the height 25-35cm of described overflow weir 2, preferred 30cm.
In order to ensure that the water overflowed from overflow weir 2 enters described water inlet distribution trough 3 completely, the outer wall that the side body of wall 11 of described water inlet distribution trough 3 is close to described overflow weir 2 is arranged, the height of described overflow weir 2 and highly concordant with the body of wall 11 that it is close to.
Wherein, described first reaction tank 6 is provided with water-in 9, and described water-in 9 is communicated with described first inhalant region, and the water of described first inhalant region enters described first reaction tank 6 from described water-in 9.
The symmetrical center line of described water inlet dashpot 10 overlaps with the symmetrical center line of described water inlet distribution trough 3, can ensure that the assignment of traffic of overflow weir 2 is even like this.
In order to ensure sealing effectiveness, the surrounding of described traverse 5 is provided with doorframe, and the width of described doorframe and the width of described vertical chute 4 adapt, and in order to avoid there is drainage, described doorframe outward flange is provided with rubber water-proof bar.
Particularly, described traverse 5 can be made up of stainless material, makes simple, can adapt to long period of soaking in water.
The quantity of described vertical chute 4 is more, assignment of traffic precisely more careful, and the quantity of described vertical chute 4 is preferably 4-10 group; Range estimation assignment of traffic is very directly perceived, and metering easily.
Wherein, the length of described overflow weir 2 can be 1-2m, and body of wall 11 length of described water inlet distribution trough 3 and the length of described overflow weir 2 adapt.
When needing the assignment of traffic of carrying out multiple reaction tank, follow-up, this system can be installed again, to realize the assignment of traffic of multiple reaction tank.
As can be seen from the above embodiments, the present invention can realize regulating and distributing flow, easy to use, and structure is simple, cost is low, does not need the facility such as adjustment type valve, under meter increasing large-scale pipeline and costliness, effectively can solve the problem that water inlet distributes.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (9)

1. a biochemistry pool water inlet distribution system, comprise water inlet pipe, first reaction tank and the second reaction tank, described first reaction tank and the second reaction tank are disposed adjacent, the side of described first reaction tank is located at by described water inlet pipe, it is characterized in that, also comprise into water dashpot, overflow weir, water inlet distribution trough and inlet channel, described water inlet pipe passes in described water inlet dashpot, described overflow weir is plugged in the exit of described water inlet dashpot, described water inlet distribution trough is located between the outer wall of described overflow weir and the outer wall of described first reaction tank, described water inlet distribution trough comprises the both sides body of wall be arranged in parallel, the vertical chute that many group positions are relative is provided with between the body of wall of described both sides, wherein be provided with traverse in vertical chute described in a group, described water inlet distribution trough is divided into the first inhalant region and the second inhalant region by described traverse, described first reaction tank is communicated with described first inhalant region, described inlet channel is arranged along the homonymy of described first reaction tank and the second reaction tank, and the initiating terminal of described inlet channel is communicated with described second inhalant region, the end of described inlet channel is communicated with described second reaction tank.
2. biochemistry pool water inlet distribution system as claimed in claim 1, is characterized in that, the height of described overflow weir is lower than the cell wall height of described water inlet dashpot, and the height of described traverse exceeds the height of described overflow weir.
3. biochemistry pool water inlet distribution system as claimed in claim 2, is characterized in that, the height of described overflow weir is lower than the cell wall height 35-45cm of described water inlet dashpot, and the height of described traverse exceeds the height 25-35cm of described overflow weir.
4. biochemistry pool water inlet distribution system as claimed in claim 1, is characterized in that, the outer wall that the side body of wall of described water inlet distribution trough is close to described overflow weir is arranged, the height of described overflow weir and concordant with the body of wall height that it is close to.
5. biochemistry pool water inlet distribution system as claimed in claim 1, it is characterized in that, described first reaction tank is provided with water-in, and described water-in is communicated with described first inhalant region.
6. biochemistry pool water inlet distribution system as claimed in claim 1, it is characterized in that, the symmetrical center line of described water inlet dashpot overlaps with the symmetrical center line of described water inlet distribution trough.
7. biochemistry pool water inlet distribution system as claimed in claim 1, it is characterized in that, the surrounding of described traverse is provided with doorframe, and the width of described doorframe and the width of described vertical chute adapt, and described doorframe outward flange is provided with rubber water-proof bar.
8. biochemistry pool water inlet distribution system as claimed in claim 7, it is characterized in that, described traverse is made up of stainless material.
9. biochemistry pool water inlet distribution system as claimed in claim 1, it is characterized in that, the length of described overflow weir is 1-2m.
CN201510518873.6A 2015-08-21 2015-08-21 A kind of biochemistry pool enters water distribution system Active CN105129985B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510518873.6A CN105129985B (en) 2015-08-21 2015-08-21 A kind of biochemistry pool enters water distribution system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510518873.6A CN105129985B (en) 2015-08-21 2015-08-21 A kind of biochemistry pool enters water distribution system

Publications (2)

Publication Number Publication Date
CN105129985A true CN105129985A (en) 2015-12-09
CN105129985B CN105129985B (en) 2017-06-23

Family

ID=54715644

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510518873.6A Active CN105129985B (en) 2015-08-21 2015-08-21 A kind of biochemistry pool enters water distribution system

Country Status (1)

Country Link
CN (1) CN105129985B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107140736A (en) * 2017-05-18 2017-09-08 桂林理工大学 One kind improvement energy-conservation AAO treatment method for rural sewage
CN107140737A (en) * 2017-05-18 2017-09-08 桂林理工大学 Improvement energy-conservation AAO rural domestic sewage treatment systems
CN107151052A (en) * 2017-05-18 2017-09-12 桂林理工大学 One kind improvement energy-conservation AO treatment method for rural sewage
CN107162189A (en) * 2017-05-18 2017-09-15 桂林理工大学 One kind improvement energy-conservation AO rural domestic sewage treatment systems
CN107963721A (en) * 2017-12-26 2018-04-27 浦华环保股份有限公司 Wastewater biochemical pool cloth water dispenser
CN114275844A (en) * 2021-11-25 2022-04-05 上海市政工程设计研究总院(集团)有限公司 Container immersed membrane filtering device and flushing control method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201027328Y (en) * 2007-04-18 2008-02-27 刘昆 Integrated automatic water conservation equipment
KR100912021B1 (en) * 2008-05-19 2009-08-12 효성에바라엔지니어링 주식회사 Waterwaste treatment system and method thereof
CN201988234U (en) * 2011-03-31 2011-09-28 北京市市政专业设计院有限责任公司 Vertical-flow sedimentation basin
KR101236175B1 (en) * 2012-11-05 2013-02-26 서동철 A sewage disposal system using constructed wetlands with repurification function
CN204999698U (en) * 2015-08-21 2016-01-27 浦华环保有限公司 Biochemical pond distribution system of intaking

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201027328Y (en) * 2007-04-18 2008-02-27 刘昆 Integrated automatic water conservation equipment
KR100912021B1 (en) * 2008-05-19 2009-08-12 효성에바라엔지니어링 주식회사 Waterwaste treatment system and method thereof
CN201988234U (en) * 2011-03-31 2011-09-28 北京市市政专业设计院有限责任公司 Vertical-flow sedimentation basin
KR101236175B1 (en) * 2012-11-05 2013-02-26 서동철 A sewage disposal system using constructed wetlands with repurification function
CN204999698U (en) * 2015-08-21 2016-01-27 浦华环保有限公司 Biochemical pond distribution system of intaking

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107140736A (en) * 2017-05-18 2017-09-08 桂林理工大学 One kind improvement energy-conservation AAO treatment method for rural sewage
CN107140737A (en) * 2017-05-18 2017-09-08 桂林理工大学 Improvement energy-conservation AAO rural domestic sewage treatment systems
CN107151052A (en) * 2017-05-18 2017-09-12 桂林理工大学 One kind improvement energy-conservation AO treatment method for rural sewage
CN107162189A (en) * 2017-05-18 2017-09-15 桂林理工大学 One kind improvement energy-conservation AO rural domestic sewage treatment systems
CN107963721A (en) * 2017-12-26 2018-04-27 浦华环保股份有限公司 Wastewater biochemical pool cloth water dispenser
CN114275844A (en) * 2021-11-25 2022-04-05 上海市政工程设计研究总院(集团)有限公司 Container immersed membrane filtering device and flushing control method thereof
CN114275844B (en) * 2021-11-25 2024-03-08 上海市政工程设计研究总院(集团)有限公司 Container immersed membrane filtering device and flushing control method thereof

Also Published As

Publication number Publication date
CN105129985B (en) 2017-06-23

Similar Documents

Publication Publication Date Title
CN105129985A (en) Biochemical pool inlet water distribution system
WO2021036458A1 (en) Efficient self-circulation biological denitrification device and working method therefor
SE9802593L (en) Device called chamber distribution insert, intended to be mounted in the joint between two concrete pipes for dividing the pipe body into several separate chambers
CN107500408A (en) A kind of multistage A/O techniques aeration control system fed back based on ammonia nitrogen and dissolved oxygen
CN204999698U (en) Biochemical pond distribution system of intaking
KR20150130661A (en) Pipe type device for sewage and wastewater treatment
CN203855454U (en) Novel wetland punching and water distribution pipe
JP5436350B2 (en) Air lift pump device and sewage treatment facility
KR101134312B1 (en) the free mixture unit of a water-purifying system in Bernoulli's theorem
CN1312053C (en) Ammonia adding and mixig system for clear water pond
CN217555893U (en) Novel multi-point water inlet upflow hydrolysis acidification pool
CN203777729U (en) Water collection tank of settling pond
CN206308039U (en) A kind of circular unpowered regulating reservoir
CN209493328U (en) Wastewater influent device and equipment and sewage disposal device
CN205024000U (en) Automatic control formula S separates water course sewage treatment integration equipment
CN206538258U (en) A kind of control device of step feed technology
CN216377820U (en) Sewage conveying system of biochemical pond
CN206886803U (en) A kind of integrated sewage treating apparatus
CN208218498U (en) MBR reaction tank combination unit with inner circulation structure
CN220132002U (en) Non-carbon source dependent denitrification and denitrification integrated device
CN211570409U (en) Sewage treatment equipment based on EHBR aeration biofilm reactor
CN208022784U (en) A kind of sewage disposal biological reaction pool
CN205528312U (en) Integrated treating equipment
CN209468187U (en) Applied to the water distributor modular unit and water treatment facilities in water processing reactor
CN203768050U (en) Multi-point dosing type pipeline reactor

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
CB02 Change of applicant information
CB02 Change of applicant information

Address after: 100084 Haidian District Tsinghua Science and technology building, C27, Beijing

Applicant after: THUNIP HOLDINGS CO., LTD.

Applicant after: Puhua Holding Co., Ltd.

Address before: 100084 Haidian District Tsinghua Science and technology building, C27, Beijing

Applicant before: THUNIP Holdings Co., Ltd.

Applicant before: Ziguang Environmental Protection Co., Ltd.

GR01 Patent grant
GR01 Patent grant