JPS6237334B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for determining the condition of treated water in water treatment using activated sludge, electro-processing fluid treatment, etc., and also for determining the properties of fluids such as exhaust gas.

In a biological treatment tank, if over-aeration is performed, activated sludge becomes finer, pH decreases due to nitrogen oxidation, and phenomena such as settling sludge being thrown up occur, which impedes normal operation.

Furthermore, when filamentous fungi multiply, the activated sludge does not settle and a bulking phenomenon occurs. To prevent such abnormalities, chemicals should be introduced and the amount of aeration should be controlled. When the amount of activated sludge is very low, or when the load is generally high, the amount of air is reduced or a BOD source is added. In such biological treatment, it is necessary to constantly monitor and control the condition, activity state, etc. of the organisms.

The present invention has been proposed for this purpose, and includes a pipe through which the fluid to be tested flows through the treated water, which may be a gas, and a detection device installed in a part of the pipe. A device that includes a laser irradiation device that irradiates a laser toward the detection section, a detector that detects reflected, scattered, or transmitted light of the laser irradiated to the subject, and that discriminates a detection signal by the detector. In the device, one or more of the detectors are provided, a plurality of the laser irradiation devices each having a different output or wavelength, or both are provided at different angles, and the detector and each of the laser irradiation devices are irradiated at the same time or at different times. It is characterized by being divided into parts.

The present invention will be explained below with reference to an embodiment of the drawings.
First, the identification of biologically treated water will be explained.

In Fig. 1, 1 is a pipe for sampling and distributing treated water from a treatment tank using activated sludge, etc., 2 is a detection unit with a narrowed pipe diameter, 31, 32,
33 are laser irradiation devices with different outputs, wavelengths, or both;
Laser irradiation is performed on one point. 4 is a control circuit for time-division control of each irradiation device; 5 is a reflection of irradiation light;
This detector 5 detects transmission and scattering, and the detector 5 and each of the irradiation devices 31, 32, and 33 face each other with deflections of angles α, β, and γ, respectively. 6 is an amplifier for amplifying the signal from the detector 5, 7 is a discrimination circuit, and 8 is an output display circuit.

In the above apparatus, the water of the subject is made to flow through the pipe 1 by a pump (not shown). Water flows through the detection section 2 made of a translucent material, and is irradiated with lasers having different outputs, wavelengths, or both from irradiation devices 31, 32, and 33, respectively. It is assumed that laser irradiation is time-divisionally controlled by circuit 4. For example, the irradiation device 31
→ 32 → 33 are operated in the order, and first, laser irradiation is performed from the irradiation device 31. The irradiated light hits the microorganisms in the water and is reflected, scattered, and transmitted. The reflected and scattered light and the transmitted light exhibit different values depending on the amount of microorganisms, the type of microorganisms, etc. as the state of reflection and scattering differs. The scattered light differs depending on the angle. First, the irradiation device 31 is activated and the scattered light is detected from the detector 5 at an angle α, and then the irradiation device 32 is activated to detect the scattered light from the detector 5 at the angle α. Photodetection is performed by irradiation from the β direction. Furthermore, irradiation device 3
3 is activated, and light detection is performed by irradiation from the angle γ direction. This laser irradiation with different properties from each different direction is performed sequentially in a time-sharing manner,
It is digitally detected sequentially by the detector 5, distinguished and displayed, and furthermore, an X, Y recorder (not shown) is used to graph the irradiation light intensity against the irradiation angle, thereby comparing it with a graph prepared in advance. If you do this, you can easily identify the organisms in the water and the activated sludge condition.

There is a method of moving the irradiation device or detector to detect the angular distribution of scattered light, but this method can be simplified by eliminating the moving device by time-sharing control of the irradiation device in each direction as described above. , the detection speed can be increased. Of course, the irradiation device has angles α, β,
The position of γ can be changed arbitrarily, and three or more may be provided. Alternatively, the light can be configured to be irradiated from each predetermined angle using a reflecting mirror. Further, the laser output of each irradiation device is not the same, and may generate outputs of different wavelengths.

3 in FIG. 2 is a plurality of laser irradiation devices 31, 32, 33 each having different output or wavelength or both.
and is controlled to operate in a time-division manner.

51, 52, 53, and 54 are detectors. For example, the detectors 51, 52, and 53 are linked to the laser irradiation devices 31, 32, and 33 that operate in a time-division manner, and detection corresponding to each is performed. Controls such as constant monitoring and detection are performed.

With this configuration, not only partial information but also the overall state of reflection, scattering, and transmission can be easily detected at high speed and with high precision.

As described above, according to the present invention, if a plurality of irradiation devices are provided at different angles and time-division control is performed by switching them, laser irradiation can be performed from one direction or at different angles. Reflected, scattered, and transmitted light can be detected and discriminated using multiple detectors, and if the output laser light of each irradiation device is made different, changes due to irradiation light with different intensities can be detected by time-division operation. can. Also, changes caused by simultaneous irradiation from multiple irradiation devices at different angles can be detected.

In addition, if multiple detectors are installed at different angles and the detectors are operated simultaneously, it is possible to detect scattered light, etc. corresponding to the angle at high speed and with high precision. In particular, it is possible to detect the flow state of the fluid to be measured. If detection is performed by control, the detection speed is increased by eliminating the conventional moving device, and by time-sharing detection by switching to support combinations with multiple irradiation devices, it is possible to detect all kinds of states and changes with a significantly increased detection frequency. , the accuracy of detection and judgment can be increased.

In biological treatment, it samples and detects treated water during treatment operation, determines the microbial status, breeding status, etc., and quickly detects whether the target treatment reaction is proceeding as intended and controls accordingly. death,
By controlling the amount of oxygen, amount of reactive nutrients, pH value, temperature, etc. to optimal conditions, stable and highly efficient biological treatment can be continued.

It can also be used to judge machining fluids in electrical discharge machining, electrolytic machining, etc., and is extremely effective in always accurately detecting and determining the mixing state of machining chips and ions, and optimally controlling ion exchange processing, overfilter processing, etc. It is. It is also extremely effective in determining the optical properties of other plating liquids and other various liquids, and in determining the properties of fluids such as exhaust gas.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of another embodiment. 1 is a pipe, 2 is a detection part, 3, 31, 32, 3
3, a laser irradiation device, 4 a control circuit, 5,5
1, 52, 53, 54 are detectors, 6 is an amplifier, 7
8 is a discrimination device, and 8 is a display device.

Claims (1)

[Claims] 1. Provide a pipe through which the fluid of the test object flows, provide a detection section in a part of the pipe, provide a laser irradiation device that irradiates a laser toward the detection section, and reflect the laser irradiated to the test object, A device equipped with a detector that detects scattered or transmitted light, and a device that discriminates the detection signal from the detector,
One or more of the detectors are provided, a plurality of the laser irradiation devices each having a different output, wavelength, or both are provided at different angles, and the detector and each of the laser irradiation devices are operated simultaneously or in a time-sharing manner. A fluid property determination device characterized by: