NL2030407B1 - Remote on-line monitoring device of sv30 and svi of sludge - Google Patents

Remote on-line monitoring device of sv30 and svi of sludge Download PDF

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Publication number
NL2030407B1
NL2030407B1 NL2030407A NL2030407A NL2030407B1 NL 2030407 B1 NL2030407 B1 NL 2030407B1 NL 2030407 A NL2030407 A NL 2030407A NL 2030407 A NL2030407 A NL 2030407A NL 2030407 B1 NL2030407 B1 NL 2030407B1
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sludge
sedimentation
sedimentation device
svi
pipeline
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NL2030407A
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Dutch (nl)
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NL2030407A (en
Inventor
Ding Yangcheng
Xu Yingfeng
Feng Huajun
Xia Yijing
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Univ Zhejiang Gongshang
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/006—Regulation methods for biological treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/005—Processes using a programmable logic controller [PLC]
    • C02F2209/008—Processes using a programmable logic controller [PLC] comprising telecommunication features, e.g. modems or antennas
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]

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  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

The remote on—line Hwnitoring device of SV3O and SVI of sludge comprises an acquisition device, a sedimentation device, a cleaning device, and, a Inonitoring feedback device, wherein the acquisition device comprises a Hficro—power pump, a check valve, 5 and a sludge pipeline; the sedimentation device is a transparent vertical vessel and comprises a sludge concentration meter sensor; the cleaning device comprises a macro—power pump, a check valve, an electric valve, a clear water pipeline, and a blow—off pipeline; the monitoring feedback device comprises a set of image IO system; and the image system. has the functions of shooting, storage, and transmission. According to the sludge SV30 and SVI remote on—line Hwnitoring device and operation method, SV30 and the SVI can. be obtained, by using the simplest device, and, the real—time SV3O and the SVI of each set of equipment can be 15 obtained skillfully by Hwnitoring without going to an equipment site. (+ Fig. l)

Description

P889/NLpd REMOTE ON-LINE MONITORING DEVICE OF SV30 AND SVI OF SLUDGE
TECHNICAL FIELD The present disclosure belongs to the field of sewage treat- ment, and in particular relates to a remote on-line monitoring de- vice of SV30 and SVI of sludge.
BACKGROUND ART An activated sludge process is a main method for biological wastewater treatment by taking activated sludge as a main body. The activated sludge process refers to continuously introduce air into the wastewater to continuously mix and cultivate the wastewater and various microbial communities. After a certain time, the sludge-like floccules formed by reproduction of aerobic microorganisms are called as activated sludge, which has a strong ability to adsorb and oxidize organic matters and can decompose and remove organic pollutants from the wastewater.
In the actual operation of activated sludge process, due to variable operating conditions, such as changes in influent water quality and climate, the treatment effect of the activated sludge process would be disturbed and affected, resulting in substandard quality of treated water. To this end, efficient activated sludge is essential to obtain the good quality of treated water. At pre- sent, an index for judging the performance of the activated sludge comprises: mixed liquid suspended solid (MLSS), sludge sedimenta- tion ratio (SV30), sludge index [sludge volume index (SVI), sludge density index (SDI)], wherein SVI=SV30/MLSS.
For monitoring of the MLSS, various on-line monitoring and portable determination devices have already appeared in the mar- ket, however, for monitoring of SV30, a sequential batch volumet- ric cylinder sedimentation experiment is still adopted by most sewage treatment equipment, which is time-consuming and labor- consuming, and the change of the characteristics of the activated sludge cannot be accurately reflected due to the fact that detec- tion is only carried out once a day basically. Once the sedimenta-
tion and concentration performance of the sludge is changed, the change of the concentration of the sludge layer and the bottom re- turn sludge in a secondary sedimentation tank can be directly af- fected, thus indirectly affecting an SS (suspended matter concen- tration) value of effluent and the biomass of an aeration tank, and the real-time on-line monitoring of the SV30 index is of great significance to the good operation of the sewage treatment equip- ment.
SUMMARY For the defect that an existing SV30 determination device cannot achieve real-time performance, a remote on-line monitoring device of SV30 and SVI of sludge is provided. The SV30 and SVI can be obtained by using the simplest device, and the real-time SV30 and SVI of each set of equipment can be obtained skillfully by monitoring without going to an equipment site, thus the operation and maintenance time is greatly shortened, and the operation and maintenance efficiency is improved.
A specific technical solution adopted by the present disclo- sure is as follows: a remote on-line monitoring device of SV30 and SVI of sludge comprises an acquisition device, a sedimentation device, a clean- ing device, and a monitoring feedback device; the sedimentation device is a transparent columnar vessel, a movable sludge concen- tration meter sensor is fixed to the top of the sedimentation de- vice in a suspending manner, and the sludge concentration meter sensor is submerged in the sludge during use; a water outlet is further provided on an upper part of the side wall of the sedimen- tation device and is connected to an external water outlet pipe- line; the acquisition device comprises a first micro-power pump, a first check valve, and a sludge pipeline; the sludge pipeline is communicated with the sedimentation device through a sludge inlet formed in the bottom of the sedimentation device, and the first micro-power pump and the first check valve are arranged on the sludge pipeline; the cleaning device comprises a second micro- power pump, a second check valve, a venting valve, a clear water pipeline, and a blow-off pipeline; the clear water pipeline and the blow-off pipeline are respectively communicated with the sedi- mentation device through the clear water inlet and a venting port formed in the bottom of the sedimentation device, the second mi- cro-power pump and the second check valve are arranged on the clear water pipeline, and the venting valve is arranged on the blow-off pipeline; and the monitoring feedback device is located beside the sedimentation device and is used for shooting the sedi- mentation device, thus identifying a sludge interface position through shot images.
Preferably, the sedimentation device is a transparent vessel, and a material used comprises but is not limited to glass, plas- tic, and poly (methyl methacrylate).
Preferably, the sedimentation device is a columnar vessel, the cross-sectional shape of the sedimentation device comprises but is not limited to triangular, rectangular, polygonal, round, and irregular shapes, with a height of 5-20 cm.
Preferably, an openable hole is formed in the top of the sed- imentation device, thus the sludge concentration meter sensor can be conveniently taken out for maintenance.
Preferably, the type of the micro-power pump comprises but is not limited to a peristaltic pump, a submersible pump and a pipe- line pump, the flow rate of the micro-power pump is 1-100 L/min, and the lift of the micro-power pump is 0.5-10 m.
Preferably, the monitoring feedback device comprises a shoot- ing device and a built-in image processing system and has func- tions of shooting, storage, calculation, and transmission.
Compared with the prior art, the present disclosure has the advantages that: (1) the device disclosed by the present disclosure can re- motely monitor SV30 on-line in real time to learn sludge proper- ties; (2) the device disclosed by the present disclosure is rela- tively simple, easy to install and wide in applicability; (3) there is no need for any manual maintenance, the opera- tion is simple, and unattended operation can be achieved.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic diagram of a device in accordance with the present disclosure.
Reference numerals shown in the drawing is as follows: l-sedimentation device; 2-sludge inlet; 3-clear water inlet; 4-venting port; 5-water outlet; 6-sludge concentration meter sen- sor; 7-first micro-power pump; 8-first check valve; 9-venting valve; 10-monitoring feedback device; 11-second micro-power pump; l2-second check valve.
DETAILED DESCRIPTION OF THE EMBODIMENTS Embodiment: A remote on-line monitoring device of SV30 and SVI of sludge in the embodiment comprises an acquisition device, a sedimentation device 1, a cleaning device, and a monitoring feedback device 10; the sedimentation device 1 is a transparent vertical vessel, a sludge concentration meter sensor 6 is fixed to the top of the sedimentation device in a suspending manner, and is submerged in the sludge during use; a water outlet 5 is further formed in an upper part of the side wall of the sedimentation device 1 and is connected to an external water outlet pipeline; water flow in the sedimentation device 1 flows out from the water outlet 5 from bot- tom to top, and turbulence is easily formed in a triangular area between the top of the sedimentation device and the water outlet 5, thus effectively reducing a cleaning dead angle area at the top of the device; and an openable hole is further formed in the top of the sedimentation device 1, thus the sludge concentration meter sensor 6 can be conveniently taken out for maintenance.
The acquisition device comprises a first micro-power pump 7, a first check valve 8, and a sludge pipeline; the sludge pipe is communicated with the sedimentation device 1 through a sludge in- let 2 formed in the bottom of the sedimentation device 1, and the first micro-power pump 7 and the first check valve 8 are sequen- tially arranged on the sludge pipe distancing from the sedimenta- tion device 1 from far to near; the cleaning device comprises a second micro-power pump 11, a second check valve 12, a venting valve 9, a clear water pipeline, and a blow-off pipeline; the clear water pipeline and the blow-off pipeline are respectively communicated with the sedimentation device 1 through a clear water inlet 3 and a venting port 4 formed in the bottom of the sedimen- tation device 1, the second micro-power pump 11 and the second check valve 12 are sequentially arranged on the clear water pipe- 5 line distancing from the sedimentation device 1 from far to near, and the venting valve 9 is arranged on the blow-off pipeline; the monitoring feedback device 10 is located beside the settlement de- vice 1 and comprises a camera and other shooting devices and a set of built-in image processing system, the monitoring feedback de- vice can shoot the whole appearance of the sedimentation device 1, and also has the functions of shooting, storage, calculation and transmission. The image processing system may directly adopt com- mercially available common software, and preferably, the software can be Baidu smart cloud, Tencent Youtu, Alibaba Cloud and the like.
The sedimentation device 1 has a height of 5-20 cm, and is made of a transparent material, the interference on judgment of the sludge interface by the color of the device itself can be avoided. The material of the sedimentation device comprises but is not limited to glass, plastic, and poly (methyl methacrylate), further preferably, the organic glass which is good in transmis- sion of light, high in structural strength, and difficult to be damaged. In order to improve the sludge sedimentation effect and enhance the interface clarity, the sedimentation device 1 must have a vertical structure. A bottom shape of the sedimentation de- vice comprises but is not limited to triangular, rectangular, po- lygonal, round, and irregular shapes, further preferably the round shape, the round vertical structure (cylinder) has no dead angle, and the sludge cannot be settled and accumulated in the sedimenta- tion device. There are certain dead angles in other shapes, and sludge cake sediment in the dead angle is formed after long-time use.
The type of the micro-power pump comprises but is not limited to a peristaltic pump, a submerged pump, a pipeline pump, the flow rate of the micro-power pump is 1-100 L/min, and the lift of the micro-power pump is 0.5-10 m. The flow rate of the micro-power pump is 1-100 L/min, if the flow rate is excessively small, the sludge in the sedimentation device cannot be evenly mixed, the sludge may be settled during the pump feeding process, thus re- sulting in large final determination value; if the flow rate is excessively large, the energy waste may be caused; in addition, due to the overall small size of the device, large pressure impact may be caused to an inlet and an outlet and the sedimentation de- vice 1 under large flow rate impact, the service life of the de- vice is reduced.
An on-line monitoring method based on the remote on-line re- mote monitoring device of SV30 and SVI of the sludge comprises the following steps: 1) enabling sludge to enter the inside of the sedimentation device 1 through a first micro-power pump 7 and a first check valve 8 from the sludge pipeline, wherein the water flow carried in sludge is converged into supernatant by standing and then flows out from the water outlet 5 in the top of the side wall of a sedi- mentation device 1; after continuously operating for 3-10 min, making the first micro-power pump 7 stop operating, and enabling a sludge concentration meter sensor 6 probe to extend into the sludge to determine the sludge concentration MLSS. Due to the fact that to-be-determined sludge is essentially a mud-water mixture and is prone to settling or uneven mixing, in this step, the first micro-power pump 7 needs to continuously pump the sludge for a certain period of time before stopping operation to ensure that the sludge in the sedimentation device 1 is evenly mixed.
2) shooting the sedimentation device 1 by the monitoring feedback device 10, after the sludge in the sedimentation device 1 is settled for 30 min, shooting the sedimentation device 1 by the monitoring feedback device 10 again, and then identifying the height h where the sludge interface is located by comparing the two images; 3) calculating SV30=h/H total height and SVI=MLSS/SV30 through the image processing system, and sending data to a moni- toring platform, wherein the monitoring platform comprises but is not limited to communication software such as an operation and maintenance monitoring platform, a web page, a short message, an email, and Wechat;
4) starting the cleaning device to make clear water enter the inside of the sedimentation device 1 through the second micro- power pump 11 and the second check valve 12 from a clear water pipeline, continuously operating for 3-10 min, making the second micro-power pump 11 stop operating; controlling a venting port 4 to open through the venting valve 9, and discharging sewage after cleaning through the blow-off pipeline, and controlling the vent- ing port 4 to close by the venting valve 9 after a certain time; and 5) repeating the steps 1)-4) after a certain time, thus achieving remote on-line monitoring of SV30 and SVI of the sludge.
The operation time of the micro-power pump is 3-10 min, if the operation time is excessively short, original sludge in the sedimentation device cannot be washed and cleaned sufficiently; if the operation time is excessively long, energy waste may be caused, and the partial sedimentation of the sludge pumped into the sedimentation device in earlier stage may be caused, thus re- sulting in a large final determination value. The starting fre- quency of the micro-power pump is 2-10 times/day, if the starting frequency is excessively low, the online monitoring of SV30 is not timely and accurate, and the sludge is easy to be accumulated in the sedimentation device to form caked masses and is hard to be washed away by a water pump, resulting in impact on the later de- termination accuracy. Specific interval time in the step 5) may be set according to an actual requirement of on-line monitoring.
In addition, identification of the sludge interface on the sedimentation device 1 may be achieved by setting scale on a wall surface of the sedimentation device 1 in advance, and then reading a height value from the scale. And the identification of the sludge interface on the sedimentation device may also be achieved by converting through a relative proportion in the image; due to the fact that the overall height value of the sedimentation device 1 may be measured in advance, the height of the sludge interface may be obtained by converting according to the proportion between the height distancing from the sludge interface to the bottom sur- face of the sedimentation device 1 and the overall height of the sedimentation device 1 in the image.

Claims (4)

CONCLUSIESCONCLUSIONS 1. Inrichting voor het on-line op afstand monitoren van slib vol- gens SV30 en SVI, omvattende een opname-inrichting, een sedimenta- tie-inrichting (1), een reinigingsinrichting en een bewakingste- rugkoppelingsinrichting (10); waarbij de sedimentatie-inrichting (1) een transparant zuilvormig vat is, een beweegbare slibconcen- tratiemetersensor (6) op een hangende manier aan de bovenkant van de sedimentatie-inrichting is bevestigd en de slibconcentratieme- tersensor (6) is ondergedompeld in het slib tijdens gebruik ervan; waarbij verder een wateruitlaat (5) is voorzien op een bovenste deel van de zijwand van de sedimentatie-inrichting (1) en is ver- bonden met een externe wateruitlaatpijpleiding; waarbij de opname- inrichting een eerste micro-krachtpomp (7), een eerste terugslag- klep (8) en een slibpijpleiding omvat; waarbij de slibpijpleiding in verbinding staat met de sedimentatie-inrichting (1) via een slibinlaat (2) gevormd in de bodem van de sedimentatie-inrichting {1), en de eerste micro-krachtpomp (7) en de eerste terugslagklep (8) zijn voorzien op de slibpijpleiding; waarbij de reinigingsin- richting een tweede micro-krachtpomp (11), een tweede terugslag- klep (12), een ontluchtingsklep (9), een schoonwaterleiding en een afblaasleiding omvat; waarbij de schoonwaterleiding en de afblaas- leiding respectievelijk in verbinding staan met de sedimentatie- inrichting (1) via een schoonwaterinlaat (3) en een ontluchtings- poort (4) gevormd in de bodem van de sedimentatie-inrichting (1), de tweede micro-krachtpomp (11) en de tweede terugslagklep (12) zijn voorzien op de schoonwaterleiding, en de ontluchtingsklep (9) is aangebracht op de afblaasleiding; en de bewakingsterugkoppe- lingsinrichting (10) zich bevindt naast de sedimentatie-inrichting (1) en wordt gebruikt voor het fotograferen van de sedimentatie- inrichting (1), waardoor een slibinterface-positie wordt geidenti- ficeerd door middel van geschoten beelden.Apparatus for on-line remote monitoring of sludge according to SV30 and SVI, comprising a recording device, a sedimentation device (1), a cleaning device and a monitoring feedback device (10); wherein the sedimentation device (1) is a transparent columnar vessel, a movable sludge concentration meter sensor (6) is attached to the top of the sedimentation device in a hanging manner, and the sludge concentration meter sensor (6) is immersed in the sludge during using it; further wherein a water outlet (5) is provided on an upper part of the side wall of the sedimentation device (1) and is connected to an external water outlet pipeline; the receiving device comprising a first micro-power pump (7), a first check valve (8) and a sludge pipeline; wherein the sludge pipeline communicates with the sedimentation device (1) through a sludge inlet (2) formed in the bottom of the sedimentation device {1), and the first micro-power pump (7) and the first check valve (8) are provided on the sludge pipeline; wherein the cleaning device comprises a second micro-power pump (11), a second non-return valve (12), a vent valve (9), a clean water line and a blow-off line; wherein the clean water pipe and the blow-off pipe respectively communicate with the sedimentation device (1) through a clean water inlet (3) and a vent port (4) formed in the bottom of the sedimentation device (1), the second micro power pump (11) and the second check valve (12) are provided on the clean water line, and the vent valve (9) is provided on the blow-off line; and the monitoring feedback device (10) is located next to the sedimentation device (1) and is used for photographing the sedimentation device (1), thereby identifying a sludge interface position through shot images. 2. Inrichting voor het online op afstand monitoren van slib vol- gens SV30 en SVI in overeenstemming met conclusie 1, waarbij de sedimentatie-inrichting (1) een transparant vat is, waarbij een gebruikt materiaal omvat, maar niet beperkt is tot, glas, plastic en poly (methylmethacrylaat).An online remote sludge monitoring device according to SV30 and SVI according to claim 1, wherein the sedimentation device (1) is a transparent vessel, wherein a used material includes, but is not limited to, glass, plastic and poly(methyl methacrylate). 3. Inrichting voor het online op afstand monitoren van slib vol- gens SV30 en SVI in overeenstemming met conclusie 1, waarbij de sedimentatie-inrichting (1) een zuilvormig vat is, waarvan de vorm in dwarsdoorsnede omvat, maar niet beperkt is tot, driehoekige, rechthoekige, veelhoekige, ronde en onregelmatige vormen, met een hoogte van 5-20 cm.An online remote sludge monitoring device according to SV30 and SVI according to claim 1, wherein the sedimentation device (1) is a columnar vessel, the cross-sectional shape of which includes, but is not limited to, triangular , rectangular, polygonal, round and irregular shapes, with a height of 5-20 cm. 4. Inrichting voor het online op afstand monitoren van slib vol- gens SV30 en SVI in overeenstemming met conclusie 1, waarbij de bewakingsterugkoppelingsinrichting (10) een opname-inrichting en een ingebouwd beeldverwerkingssysteem omvat, en de functies heeft van fotograferen, opslaan, berekenen en verzenden.The device for on-line remote monitoring of sludge according to SV30 and SVI according to claim 1, wherein the monitoring feedback device (10) comprises a recording device and a built-in image processing system, and has the functions of photographing, storing, calculating and to send.
NL2030407A 2022-01-03 2022-01-03 Remote on-line monitoring device of sv30 and svi of sludge NL2030407B1 (en)

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