KR101588639B1 - Automatic sludge settle apparatus - Google Patents

Automatic sludge settle apparatus Download PDF

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Publication number
KR101588639B1
KR101588639B1 KR1020150098434A KR20150098434A KR101588639B1 KR 101588639 B1 KR101588639 B1 KR 101588639B1 KR 1020150098434 A KR1020150098434 A KR 1020150098434A KR 20150098434 A KR20150098434 A KR 20150098434A KR 101588639 B1 KR101588639 B1 KR 101588639B1
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KR
South Korea
Prior art keywords
valve
sample
water
solenoid valve
washing
Prior art date
Application number
KR1020150098434A
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Korean (ko)
Inventor
김재철
Original Assignee
에널텍티엠에스(주)
에이티티(주)
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Priority to KR1020150098434A priority Critical patent/KR101588639B1/en
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Publication of KR101588639B1 publication Critical patent/KR101588639B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/02—Settling tanks with single outlets for the separated liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/30—Control equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/08—Cleaning containers, e.g. tanks
    • B08B9/0804—Cleaning containers having tubular shape, e.g. casks, barrels, drums
    • B08B9/0813—Cleaning containers having tubular shape, e.g. casks, barrels, drums by the force of jets or sprays
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/18—Water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
    • B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
    • B08B2203/0282—Safety devices

Abstract

The present invention comprises: firstly, in regards to an automatic sludge settling apparatus including a water tank where sludge of sample water settles and an automatic cleaning device which cleans the water tank, the automatic cleaning device is divided to a control part on an upper side and a valve part on the lower side wherein the water tank, in an aspect of the automatic cleaning device, is coupled to the valve part, and even when the water tank is overflowed with the sample water, the water tank prevents the sample water from flowing in to the control part; secondly, due to a valve part which automatically controls the valve part, the cleaning of the water tank is performed automatically such that the automatic sludge settling apparatus provides convenience to a worker; and thirdly, the control part is located and a plate, which slide moves to a front surface, is equipped such that conveniences such as replacing compartments, assembling, and repairing due to a failed component is provided.

Description

{AUTOMATIC SLUDGE SETTLE APPARATUS}

The present invention relates to an automatic precipitation apparatus that provides a sample water to a water quality analyzer, and more particularly, to an automatic precipitation apparatus that stably provides a water quality analyzer with the number of sedimented samples.

In general, suspended solids (SS) refer to all insoluble matter or particles suspended in water. In the river, microorganisms, viscosity, sand, and vegetation are suspended, and industrial wastewater becomes soil, metal, and oil. Particularly in the food industry, some of the raw materials tend to float.

In this case, as shown in FIG. 1, the conventional sample supply apparatus feeds a sample water such as sewage, sewage or the like to the water tank 1 to provide a sample water to a water quality meter (not shown) (Not shown), and a predetermined number of hours elapsed to provide the water quality meter with the number of samples in which the float was settled.

In detail, the coarse and large suspended solids and minerals are removed by the filter in the water tank 1, and the fine suspended matters are precipitated and removed. However, after a long period of use, the filter clogging due to suspended solids causes the water quality analyzer There was no problem.

In addition, since the filter cleaning operation is performed by opening the water tank 1 from time to time in the method of removing the floating matters using the filter, a large amount of labor is required for the operator, efficiency is relatively low, and labor costs are large.

Korean Patent Publication No. 10-2005-0006347 (January 17, 2005). Korean Patent Publication No. 10-2001-0059420 (July 2006) Korean Registered Patent No. 10-1458339 (October 29, 2014)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an automatic precipitating apparatus including a water tank in which a first sample water is settled and an automatic washing apparatus for washing the water tank, The control part is divided into a valve part on the lower side and the water tank is combined with the valve part on the side of the automatic washing device to prevent the inflow of the sample water into the control part even when the water tank is overflowed and the second valve part is automatically controlled The third control part is located and the plate is slid to the front, so that the parts can be replaced, assembled, and repaired in case of trouble in the component parts. Thereby providing convenience of the automatic precipitating apparatus.

According to an aspect of the present invention, there is provided an automatic precipitation apparatus including a water tank in which sample water is settled and an automatic washing apparatus for washing the water tank, 1 discharge hole; A drain pipe connected to the first drain hole and formed in the longitudinal direction to prevent overflow of the sample water; A sample feeding hole through which sample water or washing water is introduced, And a second discharge hole formed at one side to discharge the sample water or to introduce the washing water; Wherein the automatic washing apparatus is divided into a control part on the upper side and a valve part on the lower side, and the valve part includes: a valve part connected to the first discharge hole to discharge the sample water flowing in from the first discharge hole; 1 discharge pipe; Cleaning water inflow into the washing water; A sample feeding inlet into which sample water is introduced; A sample valve connected to the sample feeding inlet to receive a sample number and to supply or block the sample water to the first solenoid valve; A first solenoid valve for receiving sample water from the sample valve or supplying wash water from the wash water inflow hole to supply sample water or washing water to the sample feeding inflow hole; A second solenoid valve that receives the sample water from the second discharge hole and supplies the sample water to the drain valve, or supplies the washing water from the washing water inflow hole to the sample feeding inflow hole; A drain valve connected to the second solenoid valve to supply sample water to the outside through a discharge port or to block discharge; .

The water tank may have a rectangular cross section for convenience of assembly of the valve part of the automatic cleaning device and may be provided on the side surface of the automatic cleaning device to prevent the number of samples overflowing from the water tank from flowing into the control part .

Further, the water tank may include a high-pressure cleaning nozzle for removing foreign matter from the water tank or supplying high-pressure cleaning water from the upper side of the water pipe to the inside thereof for cleaning. And a high pressure cleaning nozzle connected to the cleansing fluid inflow hole for removing foreign substances in the water tub.

The control part may further include: a power supply unit for supplying power; A circuit breaker to cut off the power supply to prevent a short circuit or leakage accident; A PLC for controlling the first solenoid valve, the second solenoid valve, the sample valve, the drain valve, and the cleaning valve; One end connected to the PLC and the other end connected to a control hole of the first solenoid valve, the second solenoid valve, the sample valve, the drain valve, and the cleaning valve to transfer air; .

The automatic cleaning apparatus may further include: a frame; A plurality of incision grooves formed in the frame; A plate which is inserted into the incision groove to maintain a horizontal position, the control part is divided into upper and lower parts by a control part and a valve part, .

According to the automatic sedimentation apparatus of the present invention, the inflow operation, the sedimentation operation, the discharge operation, and the cleaning operation of the sample water can be set to be repeated automatically, thereby enabling automation without requiring a large amount of operation by the operator. It is possible to provide a stable number of samples, and it is possible to reduce costs such as labor costs and material costs.

Further, the water tank is combined with the valve part on the side of the automatic washing device, and the sample water can be prevented from flowing into the control part even when the water tank is overflowed.

Further, the control part is disposed on the upper part of the automatic settling device, and the plate is slidably moved to the front side, thereby providing the convenience of parts replacement, assembly, and repair in the event of a failure in the component parts.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a photograph showing a conventional sample supply device providing a sample to a water quality analyzer.
2 is a photograph showing an automatic precipitation apparatus according to the present invention.
FIG. 3 is a perspective view showing an automatic cleaning apparatus of an automatic precipitating apparatus according to the present invention, wherein (a) is a perspective view showing a state in which a control part and a valve part are partitioned by a plate. (b) is a perspective view showing a state in which the plate is slid to the front.
4 is a perspective view showing a valve part of a water tank and an automatic cleaning device in an automatic precipitation apparatus according to the present invention.
Fig. 5 is a plan view showing the water tank of Fig. 4 and the valve part of the automatic precipitation apparatus. Fig.
6 is a photograph showing the control part of the automatic cleaning apparatus of the automatic precipitating apparatus according to the present invention.
7 is a photograph for explaining a control process in a control part according to an embodiment of the present invention;

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals. Further, detailed descriptions of well-known functions and configurations that may be unnecessarily obscured by the gist of the present invention are omitted.

2 to 3, the automatic precipitating apparatus according to the present invention includes an automatic washing apparatus 200 for automatically washing the water tank 100, And a water tank 100 in which water precipitation is performed.

The automatic washing apparatus 200 is divided into upper and lower parts by a control part A and a valve part B The control part A is provided on the upper side of the valve part B in order to prevent the overflow phenomenon of the water tub 100 and the water tub 100 is connected to the upper part of the automatic washing device 200 Lt; / RTI > In this case, if the water tank 100 is located on the upper side, the internal water level of the water tank 100 continuously increases due to the clogging of the pipe or the like, so that the number of samples overflowing the water tank 100 flows into the control part A, Can be prevented.

The automatic washing apparatus 200 includes a frame 203 and a plurality of cutting grooves 201 formed in the frame 203 and a plate 202 that is inserted into the cutting grooves 201 and is kept horizontal The control part A and the valve part B are vertically partitioned by the plate 202 and the control part A is positioned above the plate 202. [

The frame 203 may be changed from a conventional steel material to a PVC material so that about 30% of the total weight can be reduced.

In this case, the plate 202 can be slid to the front for convenience of parts replacement, assembly, and repair in the event of a failure in the components of the control part A. In addition, It is possible to move the plate 202 in the upward direction and to have component compatibility with the valve part B (see FIG. 3 (b)).

Hereinafter, the organic coupling relationship between the water tub 100 and the valve part B formed on the lower side of the automatic washing apparatus 200 will be described with reference to FIG. 4 to FIG.

4 to 5, in order to prevent an overflow phenomenon in the water tub 100, a water pipe 110 is provided in the water tub 100. [ In this case, the drain pipe 110 is formed in a lengthwise direction from the bottom to a predetermined height H1. When the height of the sample water flowing into the water tank 100 is H1 or more, So that the overflow phenomenon can be prevented.

That is, the number of the sample flowing into the drain pipe 110 passes through the first discharge hole 111 and is connected to the first discharge hole 111 and is connected to the first discharge pipe 210 to the outside.

In this case, the water tank 100 may have a circular shape in cross section, but it is preferable that the water tank 100 has a rectangular cross section for the convenience of assembly with the automatic washing apparatus 200.

In the course of the operation of the automatic precipitator according to the present invention, the number of samples is filled in the water tank 100. The number of samples is introduced into the sample feeding inlet 221 provided in the automatic washing apparatus 200, A first solenoid valve 223 connected to the valve 222 and the sample valve 222 and a sample feeding hole 121 connected to the first solenoid valve 223 are connected to the water tank 100 do.

Meanwhile, the sample valve 222 and the first solenoid valve 223 are controlled by a control part A, which will be described in detail later.

Also, the amount of the sample water supplied to the water tank 100 is adjusted according to the capacity of the water tank 100, and the sample valve is appropriately adjusted to prevent the overflow phenomenon in the water tank.

After the predetermined time has elapsed in the water tank 100, the number of the floated samples precipitated is supplied to the water quality analyzer via the supply pipe 130.

Since the sediment suspended in the water in the water tank 100 is deposited on the bottom of the water tank 100, a second discharge hole 141 is formed at one side of the bottom of the water tank 100 And the sample water containing the suspended matters is discharged.

The number of samples discharged from the second discharge hole 141 is discharged to the outside through the discharge port 243 via the second solenoid valve 241 and the drain valve 242 provided in the automatic washing apparatus 200 do.

Meanwhile, the second solenoid valve 241 and the drain valve 242 are controlled by a control part A, which will be described in detail later.

In this case, a certain amount of suspended solids may adhere to the partition wall of the water tank 100 in the water tank 100 from which the sample water is discharged. If the sample water is not completely removed, the sample feeding hole 121 or the drain valve 242, A float may adhere to the inner flow path of the fuel cell stack and may be clogged. Such a failure may also cause an overflow of the water tub 100. [

Therefore, in the automatic settling apparatus according to the present invention, a washing water inflow hole 151 is formed at one side of the water tank 100 to prevent sticking of the float, so that the washing water can be washed.

In detail, the cleansing and feeding nipple 151 is formed at a predetermined height H2 at which the floating matter is settled, and the height H2 of the cleansing and feeding nipple 151 may be set differently depending on the type of the introduced sample water. That is, if the number of samples includes a large amount of floating, the height H 2 of the washing and drinking water inlet 151 may be set high and the height H 2 may be set to be different according to the sectional width of the water tub 100.

The washing water flows into the washing and drinking inlet 251 provided in the automatic washing apparatus 200 and flows through the washing and drinking water inlet 151 connected to the washing valve 252 and the washing valve 252 And is supplied to the water tank 100.

On the other hand, it is also necessary to flow and wash the washing water to prevent the malfunctioning of the apparatus to adhere to the sample feeding hole 121 and the second discharge hole 141.

In order to achieve this, the washing water passed through the washing and feeding inlet 251 may pass through the first solenoid valve 223 and the second solenoid valve 241 in addition to the washing valve 252, respectively.

As described above, the first solenoid valve 223 is connected to the sample valve 222

And the sample water is supplied to the sample feeding hole 121. When the automatic washing apparatus is backwashed, the sample valve 223 is switched so that the washing water is passed through the valve 222, The sample inlet tubes connected to the holes 221 and 221 are cleaned.

Likewise, the second solenoid valve 241 is connected to the drain valve 242 to discharge the sample water including the suspended material to the outside through the discharge port 243, while the second solenoid valve 241 is connected to the second discharge hole 141, The washing water supplied from the washing and feeding inlet 251 is supplied to the second discharge hole 141. [ The cleaning water is discharged to the outside through the discharge port 243 via the second solenoid valve 241 and the drain valve 242. [

A separate high pressure cleaning nozzle (not shown) is provided on the upper side of the water tank 100 during the cleaning operation of the water tank 100 to remove foreign substances from the water tank 100, May be supplied and washed. Similarly, the cleaning water feeding hole 151 may be provided with a high-pressure cleaning nozzle (not shown) for removing foreign substances in the water tub 100.

The washing water that has been washed in the water tank 100 is discharged to the outside through the discharge port 243 via the second discharge hole 141, the second solenoid valve 241, and the drain valve 242.

Thereafter, as in the above-described operation principle, the sample water is introduced into the water tank 100, and the floating water is settled, and then the number of the sample in which the floating water is deposited is supplied to the water quality analyzer via the supply pipe 130.

Hereinafter, the organic coupling relationship between the control part A formed on the upper side of the automatic cleaning device 200 and the valve part B formed on the lower side will be described with reference to FIG. 6 through FIG.

6, the control part A includes a power supply part 310 for supplying power to each configuration, a circuit breaker 320 for cutting off power to prevent a leakage accident, A PLC 330 for controlling the first solenoid valve 223 and the second solenoid valve 241, the sample valve 222 and the drain valve 242, A plurality of tubes 340 are provided.

In this case, the PLC 330 transfers compressed air through the tube 340 to the first solenoid valve 223, the second solenoid valve 241, the sample valve 222, the drain valve 242, (252). That is, the first solenoid valve 223, the second solenoid valve 241, the sample valve 222, the drain valve 242, and the cleaning valve 252 are respectively connected to the tube 340 on the upper side, Holes 2231, 2241, 2221, 2421, and 2521 are formed to enable control of the PLC 330 through compressed air.

The PLC 330 controls the sample valve 222 to be opened while the first solenoid valve 223 controls the sample valve 222 To be transferred to the sample feeding nip 121.

Also, the PLC 330 controls the sample valve (222) and the first solenoid valve (223) to close during the sample water settling operation.

The PLC 330 controls the second solenoid valve 241 to be opened and at the same time the drain valve 242 is opened so that the number of the sample flows out through the outlet 243 To be discharged.

In the washing operation, the PLC 330 controls the washing water flowing into the washing and feeding inlet 251 from the sample valve 222 and the drain valve 242 through the first solenoid valve 223 and the second solenoid valve 241, To clean the tube connected to the sample feeding nipple 221 and the discharge port 243 through the sample feeding hole 221 and the discharge port 243, respectively.

Therefore, the PLC 330 can be set to automatically repeat the inflow operation, the settling operation, the draining operation, and the cleaning operation of the sample water, and automation can be implemented without requiring a large amount of operation by the operator, It is possible to provide an effective number of samples and to obtain cost reduction effects such as labor costs and material costs.

When the suspended solids exceed the reference value in the number of samples stored in the water tank 100, the PLC 330 closes the first solenoid valve 223 to prevent overflow of the water tank 100 .

(Not shown) for measuring the amount and content of suspended matters in the water tank 100 may be additionally provided as an embodiment of the present invention. If the suspended objects are detected by the suspended object sensor, The first solenoid valve 223 is closed or the first solenoid valve 223 is opened so that the sample water in the water tank 100 can be discharged to the outside. Therefore, there is an effect that the maintenance of the operator can be facilitated.

Also, as shown in FIG. 7, the PLC 330 has a function of notifying the control status to the operator or setting and controlling the control by dividing the main, manual, and time settings.

That is, in the main mode, the state of the entire valve and the solenoid and the operating time are displayed. In the manual mode, the operator can manually check whether the valve and the solenoid are operated or not. In the time setting mode, the operator can directly set the operation time.

The embodiments of the automatic precipitation apparatus of the present invention described above are merely illustrative and those skilled in the art will appreciate that various modifications and equivalent embodiments can be made without departing from the scope of the present invention. It will be possible. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

100: Water tank 110: Water pipe
111: First discharge hole 121: Sample feeding
130: supply pipe 141: second discharge hole
151: Cleaning and feeding inflow 200: Automatic cleaning device
201: incision groove 202: plate
203: frame 210: first discharge pipe
221: sample feeding inlet 222: sample valve
223: first solenoid valves 231, 2241, 2221, 2421, 2521:
241: Second solenoid valve 242: Drain valve
243: Outlet 251: Cleaning and feeding inlet
252: Cleaning valve 310: Power source
320: Breaker 330: PLC
340: tube

Claims (5)

A second discharge hole 141 for discharging the sample water containing suspended matters on the bottom, a second discharge hole 141 for discharging the sample water containing floating matters on the bottom, A drain pipe 110 connected to the first discharge hole 111 and formed at a predetermined height from the bottom in the longitudinal direction so as to prevent overflow of the sample water, A water tank 100 having a supply pipe 130 supplied to the analyzer;
A plurality of cutting grooves 201 formed in the frame 203 and a plurality of cutting grooves 201 formed in the cutting groove 201 so as to be horizontally held and divided into upper and lower parts by a control part A and a valve part B, An automatic washing device 200 for washing the water tub 100 attached to the side including the plate 202, the control part A being located on the upper side and sliding to the front side; And
A scum sensor for measuring the amount and content of scum in the water tank 100; , ≪ / RTI &
The valve part B includes a first discharge pipe 210 connected to the first discharge hole 111 and discharging the sample water flowing in the first discharge hole 111 and a second discharge pipe 210 connected to the washing and drinking inlet 151 A sample feeding inlet 221 into which the sample water flows, a washing valve 252 which feeds the washing water flowing through the washing and feeding inlet 151 to the washing and drinking water inlet 151, A first solenoid valve 223 for receiving sample water from the sample valve 222 and supplying the sampled water to the sample feeding hole 121, A second solenoid valve 241 for receiving the sample water from the second solenoid valve 241 and a drain valve 242 for receiving the sample water from the second solenoid valve 241, And a discharge port (243) for discharging the number of samples to be discharged to the outside,
The control part A includes a power supply unit 310 for supplying power, a breaker 320 for shutting off the power supply to prevent a safety accident in case of leakage or leaking, a first solenoid valve 223, And controls the valve 241, the sample valve 222, the drain valve 242 and the cleaning valve 252 so that the operation of the first solenoid valve 223 is stopped when a certain amount of suspended matter is detected by the floatation sensor One end is connected to the PLC 330 and the other end is connected to the first solenoid valve 223, the second solenoid valve 241, the sample valve 222, the drain valve 242 And a plurality of tubes 340 connected to the control holes 2231, 2241, 2221, 2421, and 2521 of the cleaning valve 252 to transfer compressed air,
The PLC 330 opens the sample valve 222 and the first solenoid valve 223 during the flow of the sample water into the water tub 100 to count the number of samples supplied from the sample valve 222, And controls the sample valve (222) and the first solenoid valve (223) to be closed during the sedimentation of the sample water, and controls the second solenoid valve The valve 241 and the drain valve 242 are opened to allow the sample water to be discharged to the outside through the discharge port 243 and the washing water flowing into the washing and drinking water inlet 251 is supplied to the first The first solenoid valve 223 and the sample valve 222 are discharged to the second solenoid valve 241 and the drain valve 242 while being discharged to the solenoid valve 223 and the sample valve 222, And the second solenoid valve Washing the drain line connected to the solenoid valve 241 and the drain valve 242 is controlled so as to remove the foreign matter samples,
The water tank 100 further includes a high-pressure cleaning nozzle for supplying and cleaning high-pressure cleaning water from the upper side of the drain pipe 110, and a high-pressure cleaning nozzle connected to the cleaning water feeding hole 151,
The second discharge hole 141 and the sample feeding hole 121 are formed in the lower part of the first discharge hole 111 and the washing water feeding hole 151 is formed in the first discharge hole 111 and the sample Formed between the feeding nipples 121,
Wherein the autocorrelation apparatus comprises: delete delete delete delete
KR1020150098434A 2015-07-10 2015-07-10 Automatic sludge settle apparatus KR101588639B1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010059420A (en) 1999-12-30 2001-07-06 김지수 The sludgy disposal method and its plant in wast water treating system
KR20050006347A (en) 2003-07-08 2005-01-17 한국건설기술연구원 BNR(Biological Nutrient Removal) system and method by organic acids generated from sewage sludge
KR20100011578A (en) * 2008-07-25 2010-02-03 (주)웨더텍 Units for automatic measuring quality of water and measuring method thereby
KR101458339B1 (en) 2014-02-04 2014-11-04 주식회사 에코프라임 Hopper for sludge precipitation process

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010059420A (en) 1999-12-30 2001-07-06 김지수 The sludgy disposal method and its plant in wast water treating system
KR20050006347A (en) 2003-07-08 2005-01-17 한국건설기술연구원 BNR(Biological Nutrient Removal) system and method by organic acids generated from sewage sludge
KR20100011578A (en) * 2008-07-25 2010-02-03 (주)웨더텍 Units for automatic measuring quality of water and measuring method thereby
KR101458339B1 (en) 2014-02-04 2014-11-04 주식회사 에코프라임 Hopper for sludge precipitation process

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