JPS6344995A - Inclusion material for sludge treatment and treatment for sewage using it - Google Patents

Abstract

PURPOSE:To effectively perform the purification of sewage by sticking activated sludge contg. nitrite bacteria to an adsorbent consisting of a mixture of activated carbon and solid acid and including it with gel for inclusion. CONSTITUTION:Activated sludge contg. nitrite bacteria is stuck to an adsorbent formed by adding activated carbon to slid acid. Then this is included with gel for inclusion of sodium alginate, carageenan, polyacrylamide, etc. This mixture is brought into contact with COD component under aeration of oxygen- contg. gas. Thereby the treatment of sewage can be effectively performed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application: The present invention provides an enclosing body, P and A, in which activated sludge is adhered to an adsorbent consisting of a mixture of activated carbon and a solid acid, and the adsorbent is encased in an entrapping gel. This invention relates to a method for purifying wastewater using.

In this specification, activated carbon refers to a substance containing carbon, such as activated carbon or bone char activated by water vapor or chemicals, which is a porous haze, and which mainly performs nonionic adsorption, but which causes adsorption of gold. A solid acid is an acid in which the solid is an acid, such as a reaction product of alumina and silica, or a cation exchange resin, which releases H'' according to Brønsted's definition, or accepts a pair of electrons according to Lewis's definition. I'll take it.

Background technology: Conventionally, activated sludge methods and biofilm methods have been used to purify sewage. These methods could only purify organic substances that are easily decomposed. As a result, biologically difficult to decompose substances remained undecomposed, causing pollution of rivers, lakes, and sea areas. Therefore, as secondary treatment technologies, a method for completely adsorbing and removing colored substances using activated carbon (2001), a method for removing ammonia nitrogen gold using zeolite, which is a solid acid salt, and other adsorption removal methods have been developed. In addition, an enclosing body in which a solid acid and an aerobic nitrification box are fixed with an enclosing gel (Japanese Patent Application Laid-open No. 61-68198) has been disclosed. ) Progress can be seen.

Microorganisms waiting for a coplanar growth area are neutrais.
m.

mutualism, commensalism,
It is widely known that it has a synergistic effect called amensalisrn. Of these, commens
al i sm is a case in which a certain microorganism benefits from the spread of other microorganisms, for example, by converting amines and amides in wastewater into NH
; Heterotorop o -7 (heterotorop
h) is NH; -f NC); Somonas microdontia benefit from Nitrobacter bacteria that convert NO; to NO'B. Also am6ngBli
sm is a nitrobacter that converts NO into NO when a certain microorganism is damaged by the presence of another microorganism.
Bacteria of the genus #? due to heterotrophs that decompose amines and amides into NH+4. receive.

In addition, activated sludge r94, removal BO1) amount of 20 to 80
However, it is known that the smaller the BOD load and the longer the 14-hour period, the smaller the amount of surplus sludge generated.

Problem to be solved: Nitrosolanus bacteria can be made to live attached to all solid acids, and this can be used to treat wastewater under aerobic conditions, thereby promoting the nitrite oxidation of ammoniacal N. has already been disclosed in the aforementioned Japanese Patent Application Laid-Open No. 61-68198. It goes without saying that denitrification is important in sewage treatment operations, but promoting organic decomposition by activated sludge is even more important in the case of secondary treatment of sewage. However, organic substances that cannot be cationized are not adsorbed by solid acids and biodegradation reactions are not promoted.

Means for solving all problems: In the present invention, activated sludge containing nitrite oxide is attached to an adsorbent containing the above-mentioned hard-to-decompose substance that cannot be cationized, that is, an adsorbent made by adding activated carbon to main acid. , providing an enclosing body encapsulated with an entrapping gel.

As the material for forming the entrapping gel, it is desirable to use a material selected from sodium alginate, carrageenan, polyacrylamide) and polyvinyl alcohol. In addition, the inclusion body is made of beads with a diameter of about 0.5 to 10 ff.
Alternatively, it is preferable to use it in the form of a film with a thickness of 0.1 to 10 a.

It is desirable that the ratio of the dry weight of the activated sludge containing nitrite oxide and the dry weight of the adsorbent be 0.1=10 to 1:1.

Action: Mixing anastomosis of activated sludge containing all of the above-mentioned nitrifying bacteria with an adsorbent consisting of a mixture of activated carbon and solid acid,
! , air, enriched air, etc.), so-called C01)
contact with ingredients.

C01) Among the components, NfG components tend to be adsorbed by solid acids, neutral components are non-ionically adsorbed by activated carbon, and amines and amides that are adsorbed or gel are NH by microbial reactions.
NH; is converted into salivary nitrate by bacteria of the genus Nitrosomonas, which belong to heterotrophs that do not require any organic nutrients. On the other hand, since activated carbon mainly adsorbs nonionic VC organic matter, the adsorbed organic W is oxidatively decomposed primarily by the activated sludge entrained therein. The adsorption phenomenon is a phenomenon in which the concentration at the interface becomes higher than the concentration at the non-interface.
Biological decomposition is promoted, and decomposition production #1JN
O;, C02, etc. are easily desorbed from the adsorbent. NO
; is reduced to N2 in an oxygen-deficient state.

Example: Nikuegi, X, 5.79. Pebuty 8.61. Kce
2.4 'j, NaC (18,09, ammonium sulfate 14. (H', N21 (PO42,79) and water to make the total volume 104, g
Activated sludge treatment was carried out at /vt-day. This treated water has a BOD of 50-100 da/l.

NH: State N 210-290 q/e, chromaticity (J
ISKolol-10, 1: 1976) 80-11
0 degrees, 8880~66q/y, COD, (n75
~120M+/e, pf'16.6~7J, rich in properties, treated water with activated sludge, defined as secondary sewage in the sense of raw water subjected to secondary treatment.

1.5ffi! :% sodium alginate aqueous solution, activated sludge containing 1% dried Nitrosomonas spp. that has been mixed with secondary wastewater and condensed to a concentration of about 2% in a centrifuge, and powdered activated carbon (Kuraray Chemical Co., Ltd.) Good/Product name P
W type. ) and powdered alumino 7 silicate (pulverized in an Akita base weighing linopetilite whole mortar) in a weight ratio of 4: 1.5 (dry spear 4 quasi 0.08): 1:
They were mixed at a ratio of 1.1% by weight to form spheres in a 1.1% by weight Card2 water bath solution, washed with water, and then drained to form beads. In addition, the upper iα type ratio was prepared, and the beads were washed with water and drained to obtain beads. In addition, a mesh glass net (width 41, furthermore, lQclg,
Thickness I All ) was immersed to adhere gel gold to the surface of the mesh.
C for 12 hours to form a film 7 to which the inclusion body was attached. This was placed in the column shown in Figure 1 (1.6 g of liquid solution), and air aeration (0,8 Experiments were conducted under I/Ih). However, CL)υg result negative load t)
, 08 匈/Id&yr as a guideline.

In Fig. 1, a -IA straight pipe (1a) is installed approximately in the center of a transparent polyvinyl chloride lead +M bottomed medium-sized cylinder (1). 3), the flow rate is adjusted by the control valve (3a), and the vertical pipe (1a
) and bubbles are bubbled out from the aeration method (1) into the cylinder (1). The cylinder holds the enclosing body, immobilized beads (IC), and the secondary wastewater, and the desired Aerated sewage treatment is carried out.In addition, a hollow rectangular cylinder made of transparent vinyl with a vertical bottom (2)
Usually, a plurality of films (2
C) is suspended with appropriate spacing, and the vertical cylinder (1)
As in the case of , the air compressed by the blower (3) passes through the control valve (3b) and enters the vertical pipe (21L) ft.

It descends and is ejected into the waste water inside the rectangular tube (2) via the aeration method (2b).

The test results are summarized in Table 1.

Example 1 has an average diameter of 3. These are the test results when beads of Off mold f20Gg were suspended in the secondary wastewater of 1.61. Example 2 shows the test results when a film (mold-1118Oft, excluding the weight of the plastic support) prepared by the above method was immersed in the secondary wastewater of 1.61 while fixed to a plastic support. This is the result. For comparison, Example 3 is the result of a test in which sodium alginate was used as the nitrite oxidation agent, and the gelled inclusion was used in the same manner as in Examples 1 and 2.

Bol) (q/6), conMn(q/#), chromaticity, N
In terms of B tH (wg/e ), Example 1 has the best treatment efficiency, followed by Example 2 and Example 8.
It was around the 1st of the year.

Effects of the invention: The present invention provides an enclosing body in which activated sludge and an adsorbent consisting of activated carbon and solid acid are completely mixed and encased and immobilized in the same gel, and the use of this to improve sewage, especially modified sludge. This method consists of a wastewater treatment method that treats secondary wastewater that has undergone treatment and has a relatively low BOD content and a high content of NH'' and f4 elements.

The inclusion body of the present invention is a microorganism (in the case of secondary sewage treatment, in particular,
The solid acid part adsorbs ammonia, the activated carbon part adsorbs non-ionic organic components, and once oxidation and digestion are complete, they are desorbed and released into beads. It is discharged outside and the suction surface is regenerated. This results in two types of biodegradability: ionic and non-ionic.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing the general structure of a test device for a wastewater treatment package according to the present invention. (1)...Polyvinyl chloride tube (2)...Hollow square tube (IC)...Immobilized beads (2e)...Film (3)...Blower Applicant: Tari Co., Ltd. Figure 1 Procedural Amendment Document Relationship with the Case of Person Who Amends the Sewage Treatment Act Voluntary Sewage Treatment Act Address of 11 persons for patent purposes (J+”!: square) 1-3-2 Dozushiha, Kita-ku, Osaka City
No. 3 Name (Name) Tarima Co., Ltd. Agent
Person date Showa year Month Date subject to amendment Name column for V6 of the specification (1) Title of the invention The name "Sludge treatment comprehensive body and sewage treatment method using the same" and "Sewage treatment amended to ``Inclusive bodies for use and sewage treatment methods using the same''. (2) The scope of claims shall be amended as follows. 1. Activated sludge containing nitrite-oxidizing bacteria is attached to an adsorbent made of a mixture of activated carbon and monoacid, and the mixture is wrapped in a gel for sewage treatment.9. 2. The wrapping body according to claim 1, wherein the wrapping gel is made of a material selected from sodium alginate, carrageenan, polyacrylamide, and polyvinyl alcohol. 3. The enclosing body according to claim 1 or 2, wherein the enclosing body is a bead having a diameter of 0.5 to 10 m. 4. The wrapping body according to claim 3, wherein the wrapping body is fixed to the surface of the supporting body in the form of a film having a thickness of 0.1 to 10 mm. 5 The inclusion body has a weight ratio of dry activated sludge to dry adsorbent of 0.
Special I7 that is 1:10 to 1:l! F. The package according to any one of claims 1 to 4. 6. Activated sludge containing nitrite-oxidizing bacteria is attached to an adsorbent made of a mixture of activated carbon and solid acid, and the enclosing body is suspended in the wastewater to be treated, and the enclosing body is suspended in the wastewater to be treated. A sewage treatment method that involves injecting fluid into the sewage to record biological decomposition. 7. Activated sludge containing nitrite-oxidizing bacteria is attached to an adsorbent made of a mixture of activated carbon and solid acid, and the 9-encompassed body is encapsulated in an entrapping gel, fixed on a support, and immersed in VC in liquid-treated wastewater. , a wastewater treatment method in which oxygen-containing gas is blown into the wastewater to cause biodegradation.

Claims (1)

[Scope of Claims] 1. An enclosing body for sludge treatment, in which activated sludge containing nitrite-oxidizing bacteria is adhered to an adsorbent made of a mixture of activated carbon and a solid acid, and the adsorbent is encased in an entrapping gel. 2. The entrapping body according to claim 1, wherein the entrapping gel is made of a material selected from sodium alginate, carrageenan, polyacrylamide, and polyvinyl alcohol. 3. The enclosing body according to claim 1 or 2, wherein the enclosing body is a bead having a diameter of 0.5 to 10 mm. 4. The wrapping body according to claim 3, wherein the wrapping body is fixed to the surface of the support body in the form of a film having a thickness of 0.1 to 10 mm. 5 The inclusion body has a weight ratio of dry activated sludge to dry adsorbent of 0.
An inclusion according to any one of claims 1 to 4, wherein the ratio is 1:10 to 1:1. 6. Activated sludge containing nitrite-oxidizing bacteria is attached to an adsorbent made of a mixture of activated carbon and solid acid, and the enclosing body enclosed by an entrapping gel is suspended in wastewater to be treated, and oxygen-containing gas is introduced into the wastewater. A wastewater treatment method that causes biodegradation in a fluid state by injecting water into the water. 7 Activated sludge containing nitrite-oxidizing bacteria is attached to an adsorbent made of a mixture of activated carbon and solid acid, and the enclosing body is encapsulated with an entrapping gel, fixed to a support, immersed in wastewater to be treated, and oxygenated. A sewage treatment method in which a gas contained in the sewage is blown into the sewage to cause biodegradation.