JPS59173196A - Sludge control device - Google Patents

Abstract

PURPOSE:To perform optimum control of sludge by storing data on an interface height with respect to the time during the test of sludge settling measured in a turbidity sensor part into a memory and processing said data, etc. in an arithmetic part upon ending of the test. CONSTITUTION:The sludge deposited in a final settling basin 4 is returned by a pump 6 through a sludge return pipe 7 to an aeration tank 1. The sludge discharged by the pump 6 is introduced as excess sludge into a pipeline 8. A sludge control device 9 is formed of a device 9a for measuring sludge interface constituted of a sludge volume index meter and a turbidimeter, a device 9b for storing the settling of the interface, an arithmetic part 9c for the parameter of a settling curve, and a device 9d for outputting the result of the measurement and calculation. A pump 10 for controlling the inflow water is operated by the output signal from the device 9d and a pump 6 for discharging return sludge and excess sludge is operated as well.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sludge treatment device used in a water treatment system.

The water treatment system has one flat absorptivity meter, Hatsuke Sludge Kayakinho ML
BB m #l tit, sludge g reconnaissance m edition (
SVI gj l%) measuring device t is conveniently used. Among these, the SVI meter is used in the upper NI2 sludge auto-burying equipment. Using this sludge sedimentation tube, perform the sedimentation test in batches for 1.3 () minutes at the initial stage of sedimentation.
This is a device that calculates an index of sludge siltability called s'v (gamma sludge sludge index), which is obtained by dividing the sludge sludge rate (SV garden) for the performance by the MLSS meter. When sludge mold burial is performed using this SVI meter, sludge sinks 14 times! Since there is no loss of 1 month in I+, which is obtained from the reverse junior high school process of 1), there is no loss of 1 to 1 in 1 +, so 7.1 state sludge 1 regular control group II C
I%+Ji, Q'Realization of sludge elimination/Sus
It becomes difficult. If the straightness is within the range of 50 to 150, it indicates good sludge settling property. 0≦, SVI is sv
9 and the MLSSQ ratio. For this reason, different 2A
If Ichigome's SV and MLSS have the same El'VI ratio, the sludge sedimentation characteristics t r= of the previous d self 2 glueshuo have different sedimentation patterns, and the sedimentation curves are combined by Sekihoto et al. When the pressure and gravity ratio is 1, the trembling caused by the pressure whistle VC will be absent.

As a result of this, it becomes impossible to clearly discharge the sludge properties of Mfl i:t:: 24i'd, and it becomes impossible to control the sludge that runs smoothly, which may cause problems for sludge production. was there.

This 4G Akira is like the above Kushi/Samurai, don't look south, ha, Takuno c
lsvIffl'In the area where the old mud is sinking,
A part of the Ura 1 measurement sensor was set aside to measure the turbidity of the supernatant water during the sludge settling test solution, and the data of the interface thickness against time during the sludge settling test solution was stored in memory, and after test 11A was completed. , pre-accumulation data, SVSO, and MLSS pi) data are processed in the calculation unit, so that the sludge properties during sludge settling can be reliably grasped, and the sludge of different soaking conditions can be In order to make sure that the difference in properties will be revealed tomorrow, the same as above for sludge storage will be treated with IA, and VC sludge will be treated with C-reaction control 1. Sludge, eye, J4 that made it possible to do IIhaj! The purpose is to serve the equipment.

Hereinafter, an example of a single image of this invention will be explained with reference to the drawings. In FIG. 1, 1 is an aeration tank, and this tank 1 is provided with an inflow water channel 2, so that tA and inflow water from the first sedimentation tank (not shown) are mixed with each other. There is. 3 leads the air L/- John tank 1's 01 home water to the final/c Tonoike pond 4 (a snowy road). 5
is an abbreviation for discharging treated water from the final settling tank 4. The sludge deposited in the final settling tank 4 is pumped to a pump 6.
7 to air before returning the sludge to the tank IK.
It will be returned. Further, the sludge drawn out by the pump 6 is transferred to the electric circuit 8 as Sosashi sludge. 9 is sludge'#4 m
l, this equipment m9i-tsv■=itoya+i,ft
(T U', iil Ka411j2 Sah, Le sludge interface measurement [1N゛9a (details will be given), World [141 Sedimentation I6 small equipment direct 9b1 Shen Cape operation parameter performance μj71j
9c and a total (11) output device 9d. Item 11, the output Ig of the loquat output iron It 9 d operates the pump 10 that controls the inflow of water into the gamma no. At the same time, the pump 6 for removing the returned sludge and Sosashi sludge is operated.
This is a configuration diagram showing the details of 1bo 9a. In this figure 2, 73 shows 11 is a gamma mud sink formed from a cylindrical body made of crow, and the water pressure inlet at the top of this sink 14.dll is Air lift pump 1 in 12! ! Pressure entry 13 will be set up for water testing.

The lower part of the air lift pump 12 is submerged in the tank 1 at the front pier. On the outer periphery of the sinking row 11, there is a lighting number 14a and a father light device 14 with a rising tile pattern.
b is attached to the support part paulownia 15 and arranged 6y, and the support part @15 is shouldered by the conveyor 16. The 0 conveyor [6 is controlled by the lifting motor 17. This lifting motor 17 is controlled by a sludge volume (EIV) dollar tapping movement section 18. This sv4 tiger is dispatched! O part 18 is Ukemotorei 14
The output of b is manually operated by an analog level switch [δa, and this switch 18 increases the output of a by 1%i.
1+31) and an output section 1gA motion control circuit 18C to which the output of this corner amplifier 18b is manually input.

A potentiometer 1γ is attached to the rotation shaft of the lifting motor 17.
A is provided, and the output of this potentiometer J7a (・mas v (+4+1) is input manually to the circuit section 19. This circuit section I9 is connected to the input adjustment circuit 19a, the voltage V-force converter 19b, and The output is manually input to the sedimentation curve parameter calculation circuit 20. 21 is an MLS
In the S detector, the output of this ・1 extractor 21 is MLSS
It is manually powered by the control circuit section 7!2. This MLSS measurement cycle (bath section 22 is input rjA adjustment stage width circuit 22a1 - paralysis cycle j heat 22b, hold circuit 22C and VI converter 2
It is composed of id.

The output of the MLS foot measurement circuit 2 is manually input to the parameter calculation circuit 20.

As shown in Figure 3 of the above-mentioned chemical formula 14, there is a protrusion on the 5t portion of the groove, and the tls 11a is 7t even on the f311, and a portion of the sensor 23 of the cap 1 is housed in the protrusion 11a. has been done. The outputs of some of these sensors are input manually to the TUU constant circuit section 24. This TU foot measurement circuit section 24 includes a human power adjustment circuit 24a, a 1V-power converter 24b, and a memory circuit 2.
It is composed of 4 c. This TU measurement surface measurement circuit section 24
The output is manually inputted to the pi parameter calculation circuit ZO at -11. Parameter performance.

The arithmetic circuit 20 calculates each of the 611 human powers and supplies the results to the output device 25. The output device 25 corresponds to the measurement output device 9d shown in FIG. In addition, in the figure, 2b is a power cylinder, 276 is a drain, 28
is a proa, 29 is a crushing air cylinder 1. The gourd is a drainage hole.

Next, the operation of the embodiment configured as described above will be described.

First, sludge sedimentation III! Sludge is injected into the snow 11 from an air tank 12. The sludge injected into the sink 1/111 begins to settle as time passes. Data on the interface cylindrical shape with respect to the sedimentation time is compiled by the turbidity meter sensor section 23 and stored in the memory circuit 24c of the TU foot measurement circuit section 24.

On the other hand, the sludge volume SV,o with respect to the initial volume after settling for 30 minutes is determined by the sv foot measurement circuit 1 using the SVI as before.
Measured according to 9. In addition, the MLSS voltage measurement circuit section 22 measures the MLSS S, and this MLSS%5V3o
And the valley date measured in the TU measurement time 1 tower section 2.1 is processed by the calculation circuit 2o. This calculation processing result [uniform sedimentation velocity, consolidation sedimentation velocity, consolidation point (time, interface height),
The tangent line and SVI value at the consolidation point O, the turbidity of the supernatant water during the subsidence test furrow, the time difference], and the subsidence curve detector are recorded on the output device 2.

Hereinafter, the 1,000 uses of the arithmetic processing of the above IM required example will be described using the axial method 1 of FIGS. 4 to 6.

(1) Since the sludge interface measurement time required to obtain reliable data changes depending on the SVI value, the relationship between SVI and pressure opening time (tl) shown in Figure 4 is As found from the actual data, the necessary female measurement time Tm = aXSV
Determine time+b (b≧30 minutes), (a is the slope shown in FIG. 4).

This calculation is also performed by the calculation circuit 20, and the foot measurement position: B] is automatically set.

(2) The Roberts W number, which represents the consolidation sedimentation rate, is calculated from the Roberts constant and S based on actual data obtained from a water treatment system.
Since a linear relationship is obtained between VI as shown in FIG. 5, the equation can be expressed as log kr = alXsV + logbl, that is, kr = a, X SVi.

Therefore, from SV, the above equation is used to calculate the Roberts tail kr from .theta. in calculation circuit l11620.

(3) As soon as the SV works is flooded, use the relationship shown in Figure 4.4) Next, when the consolidation start time (tC) is obtained,
The following equation can be obtained based on the actual data of the water treatment system of the pressure contact point (Ho) and time (to) in FIG. 6.

log H6=az iog tc ten flag b.

a.

Or, Ho=b,・t.

The processing of the above equation is performed in the performance instrument circuit 2o.

(5) In the Roberts consolidation sinking curve equation, the parameter C after clothing H~ is the ratio of Hl and sv, o from 0.6 to 0.
Taking 111 of 8's 1,4J was refreshingly possible, so 8%7/sv, from o=a, H~=α・5
vso and 1 (=- can be determined.

(6) Processes from C) to (5) above are performed in the arithmetic circuit 2o, and the Roberts consolidation-sedimentation curve equation is expressed as Ht = H~+(HC
-H-1e-(1-10) (Hl: interface height at time t) is determined. In addition, the velocity sedimentation velocity 1 ken v8 in the slow sedimentation area is the uniform velocity sedimentation degree V8 at the time.
(t) to V6(t>F Ht+Mut ``t4t'
17-, q, -Ht+Δt/26t are calculated in the calculation circuit 2o. Furthermore, the tangent line at the consolidation point is the average value of the sedimentation velocity before and after the consolidation point, and the hardness of the rd line is a3, and a3 The equation Hg = afit + b3 is 0 (7) Therefore, by the above calculation, the parameters that can determine the washing state of sludge [column sedimentation speed drum, consolidation sedimentation curve formula (roba-ramishu), pressure welding SVI calculation is performed using the points (t, Hl, C, lb-nawate and SVI values at the consolidation point, upstream water turbidity storm during the il'f4 test, measurement IT time, shrine foot date and time, etc.) and sedimentation curve data as digital values. These sludge filling indicators are used to determine the presence of old sludge in the aeration tank and final settling tank.
A filling of g can be realized.

As described above, the present invention provides the above-mentioned effects.

(a) Conventional (7) SVI meter C is 5V3o, MLS
S, 5vI (SV30/liL,) (was 8 Rutake, but the sludge properties could not be grasped from the above image's parameters alone), but at the same time, the sludge sedimentation showed sludge formation. Detailed information on the sludge pouring state can be obtained from the parameters of the settling curve (uniform settling speed, low part constant, etc.) obtained through the test, and the aeration tank and final settling tank are Control+jL1 can definitely make you feel better.

(b) In this invention, since a turbidity meter is attached to the upper part of the sludge formation 1m, it is possible to see the supernatant water, fRJ Peng.

(c) Parameters that follow the sludge interfacial sedimentation curve can be easily obtained from experiments in actual water treatment systems from the relational expression, and do not require conventional statistical calculations. 1-4:111 and memory can be saved.

(a> Since the sludge properties obtained by the parameters increase, the sludge snowpack becomes easier, and it is possible to achieve both public burial in the aeration tank and final settling tank. For example,
By monitoring the supernatant water turbidity, the residence time in the final settling tank can be controlled.

(e) Conventionally, the measurement time of an SVI meter has been changed manually, but the setting can be changed automatically using an arithmetic circuit.

(f) Measurement performance J4. If the results are recorded on an output device such as a printer, the performance results can be easily analyzed and managed.

(g) In addition, if the measurement and calculation results are input to the control device and the collection sludge pump is controlled, it can be used for sludge distribution management in the aeration tussock and final settling tank, and for sludge and U-treatment in the final settling tank. .

(N) The algorithm for determining the tangent line a and the intercept bs at the consolidation point is simpler than before, and the calculation time can be reduced to m.

(1) As described above, since the function of determining the sludge settling state index has been added to the SVI meter, it is possible to improve the sludge recognition ability of the SVI meter.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention, FIG. 2 is a configuration diagram showing the main parts of FIG. 4 to 6 are illustrations for explaining the operation of the embodiment of the present invention.

Claims (1)

[Claims] (1) Raise the sludge sediment to the surrounding surface.
If. A sensing body is provided, and the interface of this transport body (i'Li direct signal is calculated manually), and this rendition is
When the sludge sinks, the sludge installed in ζft-a and the corpse detection part are entered.
A device for calculating the sludge trough and 2, and a turbidity meter installed in the upper right part of the sludge settling section of this device to measure the change in turbidity of the sludge water during the sludge settling test. Part of the sensor and
The output signal of a part of this sensor and the output of Keinao, which calculates the sludge result index, are calculated (Page 4 times iF6,
A sludge burial device characterized by comprising an output device for outputting the calculation results obtained by the (J)1sl-circuit.