JPS59228916A - Simple treating apparatus of waste water - Google Patents

Abstract

PURPOSE:To obtain the sludge with less water content by arranging organically efficient and small-sized apparatuses, and performing continuously, efficiently, and rapidly the waste water treatment with the compact and efficient apparatuses. CONSTITUTION:The waste water, after flowing into a storage tank 1 and staying therein for a time, is sent to a reaction tank 2. And an acidic inorganic chemical and a basic inorganic chemical are injected respectively from a dissolving tank 3 and a dissolving tank 4 to grow the substance contained in the waste water into larger flocs. Then after the waste water, when needed, is introduced into a flocculator 16 and an organic chemical such as a high molecular flocculant is injected, the waste water contg. flocs is poured ceaselessly into a skimming chamber 6 in a filtration and concentrating apparatus 5. The purified water is discharged, and the water contg. some SS is returned to the storage tank 1. The sludge, after reaching a whipper 12 and being knocked down therefrom, is added in an agitating and mixing tank 13 with an organic chemical such as a high molecular flocculant from an organic chemical dissolving tank 15, and then sent to a dehydrator 17 wherein the water content of the sludge is regulated to <=85%. The treated sludge is dropped into a sludge receiving box 23, and discarded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a method for processing various kinds of wastewater such as industrial wastewater and domestic wastewater continuously, efficiently and quickly using a compact mechanism, improving water quality and easily producing sludge with a low water content. Regarding wastewater treatment equipment, in detail, it includes a storage tank that equalizes the water quality of inflowing wastewater, a reaction tank that forms sludge floes, an acidic inorganic chemical dissolution tank and a basic inorganic chemical dissolution tank attached to this, and A tank consisting of a skimming chamber and a sludge removal chamber for carrying 70 tl of reactor water, a filtration and concentration device consisting of an endless flocked F material installed slanted inside the tank, and a filtration and concentration device that stirs the concentrated sludge and makes it easy to dewater. A semi-cylindrical stirring mixing tank with an open top, an attached organic chemical dissolving tank, a plain hollow cylinder press roll, a guide roll, and an endless water absorber running in contact with these. The present invention relates to a simple wastewater treatment device comprising a dehydrator made of a plastic belt and a transfer means such as a pipe that connects these devices.

Conventionally, as a device that continuously processes wastewater up to the production of sludge? -i Some systems install a series of coagulation sedimentation treatment equipment, pressure flotation equipment, activated sludge treatment equipment, etc. to perform treatment in sequence, but because they are biological treatments, the reaction speed is slow and the treatment efficiency is low, so the treatment takes a long time. It took time. Therefore, the device is necessarily large-sized, requires extensive civil engineering work, and requires a vast area of land for installation, resulting in an enormous equipment cost. Therefore, it is extremely difficult to install a system unless you have a considerable amount of financial leeway, and the reality is that small and medium-sized businesses, in particular, struggle to take countermeasures because they lack funds. The present invention has improved these drawbacks, and is a simple wastewater treatment device with a small installation area, which has a compact structure in which small and efficient devices are arranged in an organic manner, requiring almost no civil engineering work. , will be explained below based on the drawings.

Although the storage tank 1 is a well-known type, its capacity can be smaller than that of the conventional type because the processing efficiency of various devices in subsequent steps is good. The wastewater is temporarily retained in this storage tank to ensure its uniformity.

The reaction tank 2 is a sentence-shaped tank and is equipped with a stirrer inside, and the storage tank is connected to a pump P1' by a pipe L1.
! I will contact you via i-. A vertical acidic and basic inorganic chemical dissolving tank 3 and a basic inorganic chemical dissolving tank 4 are installed adjacent to the reaction tank, each of which is equipped with an agitator A2. A3, and pumps P2 r P3 are connected to the reaction tank and pipes L2゜L3.
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The filtration/concentration device 5 includes a skimming chamber 6, a tank 8 consisting of a sludge removal chamber 7, an endless flocking furnace material 9 that is arranged inclined in the tank and rotates intermittently, and a drive roll 1o for this. It is made up of a 7o-) switch 11 provided in the skimming chamber and a whipper 12 provided in contact with the lower running surface of the flocking furnace material, and is connected to the reaction tank via a pump P4 by a pipe L4. Continuously, the lower part of the skimming chamber is partitioned into two parts, one is a part 13a that receives purified water and is connected to the purified water discharge groove through a pipe L5, and the other part is a part 13b that receives filtrated water slightly containing SS and is connected to a pipe L6. is connected to the storage tank.

The stirring mixing tank 13 is a semi-cylindrical tank with an open top, and a rotary blade 14 is provided inside the tank. There is no connection between the filtration and concentration device and the next step.

S2 is provided. An organic chemical dissolution tank 15 is provided adjacent to the stirring mixing tank, and a stirrer A4 is provided inside the tank.
A pipe L7 communicates with the stirring mixing tank via a pump Psk. As another embodiment, a coagulation tank 16 equipped with an agitator A5 is provided in the next step of the reaction tank, and a pump P6 is connected to this organic chemical mixing tank and pipe L8, and a pump is connected to the filtration concentration device and pipe L. All additional means of communication via p71 can also be installed.

The dehydrator ν is a plain hollow cylinder 18.1 to 2.
It is composed of a book press roll 19, a plurality of guide rolls 20, and an endless water absorbent belt 21 running in contact with these. The absorbent belt is made of woven felt, needle felt, or flocked cloth, and a sludge scraping knife 22 is provided at the inverted part after the water-absorbing belt passes through the cylinder, and a box 23 for measuring the amount of sludge is provided below this. is the provision.

A pipe L is connected between this dehydrator and the storage tank. have been contacted and the filtered water will be sent back.

Next, the operation using this device will be explained. The wastewater first flows into the storage tank 1, where it temporarily stagnates, and the water quality becomes approximately uniform.

Next, it is sent to the reaction tank 2 through the pipe L+f by the pump P1. On the other hand, when pre-dissolved acidic inorganic chemicals such as aluminum sulfate are injected from the dissolution tank 3 and stirred by the stirrer A1, the substances contained in the wastewater become complex ions of metal hydroxides, which are combined with elements of BOD. 70 pieces of subcolloids and colloids are formed. Furthermore, when a pre-dissolved basic inorganic chemical such as sodium hydroxide is poured into the dissolving tank 4 and stirred, it becomes a water-insoluble metal hydroxide at a high reaction rate and grows into a large floc. The treated water is further introduced into the flocculation tank 16 as required, and a pre-dissolved organic chemical such as a polymer flocculant is injected thereinto, and stirred by the stirrer A5 to grow flocs with a diameter of 50 μm or more.

Next, the wastewater containing this floc is continuously poured into the skimming chamber 6 of the superconcentrator. The flocking furnace material 9 is stopped while there is little clogging, but as filtration progresses and more sludge adheres, the water level rises, the float switch 11 is activated, the flocking furnace material advances, and the adhered sludge is removed. Whizpa-12
When he reached the place, he was knocked down. When the clean part of the flocking furnace material appears on the upper running section, filtration progresses, the water level decreases, and the flocking furnace material stops. This action is repeated. The purified water is discharged, and the water containing some ss'l is returned to the storage tank 1. The knocked-off sludge slides down the unit S and enters the stirring mixing tank 13, where an organic chemical such as a polymer flocculant is added to the organic chemical dissolving tank 15, and when stirred by the rotary blades 14, the lumpy sludge is broken down into small pieces. However, it becomes granular and easily dehydrated. This granular sludge slides down the chute s2, falls onto the endless water-absorbing belt 21 of the dehydrator υ, and is sent to the linder 1.
8, the water is dehydrated by the pressurization of the press roll 19 and the pressing force of the water-absorbing belt, resulting in sludge with a water content of 85% or less, which is scraped off with the scraping knife 22, and the sludge receiver is placed in the box 23.
It falls and is discarded. The filtered water is returned to the storage tank 1.

As described above, the simple wastewater treatment device of the present invention is a compact and efficient device that organically arranges efficient small-sized devices, and it processes wastewater continuously, efficiently and quickly, and reduces the water content. It is easy to dispose of because it produces only a very small amount of sludge, and the SS content and BoD value of the effluent after treatment are extremely low, improving water quality.It is also compact, making it inexpensive and easy to install. It has many advantages, including a small footprint.

Next, we will describe an example of processing using the apparatus of the present invention.

Example 1゜Rice washing wastewater has an inflow of 20 ovrty days and the raw water quality is P.
H-6, 0-7. O5S=600~700ppm BO
When D=700-800ppm was treated, the effluent water was PH=6.5SS=49ppm BOD=46p
pm, the water content of the sludge was 83%, the running treatment cost was 0 yen/77/h, and the installation area was comparable to that of conventional activated sludge treatment systems. The time required to process the above IN amount was 8 hours, compared to 24 hours using the conventional method.

Example 2 When smoke and ash washing wastewater from an incinerator in a public facility was treated with the apparatus of the present invention, stable flocs were obtained, and the moisture content of the final sludge was 65%.

The filtered water was temporarily retained in the talarifier to promote sedimentation and separation, stabilize and improve water quality, and reuse it as washing water.

In conventional smoke washing and ash washing methods, the properties of the wastewater fluctuate significantly, and the sedimentation properties in the talarifier after chemical treatment are poor, resulting in poor water quality that can be reused and almost carryover.

Example 3 Wastewater treatment of broth from mackerel processing in the seafood processing industry was carried out using the apparatus of the present invention. The quality of raw water is PH=7. O5S=5
00-8[1[]ppm BOD=5[110~T0
,000ppm. When injecting chemicals, aluminum sulfate and sodium hydroxide were added as inorganic chemicals, and polyacrylamide was added as an organic chemical. The water content of the sludge after treatment was 785X and was used as fertilizer.

2i5 superhydration is PJ (=/), 813fa=80ppm
The BOD was 70 pprn and discharged without any problem.

[Brief explanation of drawings]

Claims (2)

[Claims] (1) A storage tank that equalizes the quality of inflowing wastewater;
A reaction tank for forming 70 tons of sludge, an attached acidic inorganic chemical dissolving tank and a basic inorganic chemical dissolving tank, a tank consisting of a skimming room and a sludge removal room for discharging the generated flocs with reactor water; Endless flocked Fp provided with
A filtration and concentration device consisting of
A semi-cylindrical stirring mixing tank with an open top that facilitates dehydration, an attached organic chemical dissolving tank, a plain hollow cylinder, a press roll, a kite roll,
A simple wastewater treatment device comprising: a dehydrator made of an endless water-absorbing belt that runs in contact with these devices; and a transfer means such as a pipe that connects these devices. (2) The simple wastewater treatment device according to claim (1), characterized in that a coagulation tank is disposed in a step subsequent to the reaction tank, and is connected to the organic chemical dissolution tank by a pipe.