CN1103852A

CN1103852A - Bag type biochemical reactor and organic wastewater treatment by using same

Info

Publication number: CN1103852A
Application number: CN93112626A
Authority: CN
Inventors: 陈耀章
Original assignee: Sinopec Shanghai Petrochemical Co Ltd
Current assignee: Sinopec Shanghai Petrochemical Co Ltd
Priority date: 1993-12-18
Filing date: 1993-12-18
Publication date: 1995-06-21

Abstract

The reactor is a bag-like vessel made of water permeable or non-water permeable flexible material, such as chemical fibre fabric, latex-impregnated chemical fibre fabric, etc., it is very cheap in price, and is convenient for transport and maintenance. When the reactor vessel is water permeable, the reactor concurrenly possesses the function of filtration, and the purified clear liquid is seeped out through the bag wall, while the sludge is blocked within the bag so that the concentration of the active sludge in the reactor can be greatly raised, and thus the sedimentation tank may be saved or reduced and the process flow is simplified.

Description

Bag type biochemical reactor and organic wastewater treatment by using same

The invention belongs to biological chemistry and handle the biochemical reactor of organic sewage, and relate to the method that biological chemistry is handled organic sewage.

Disposing of sewage with biological chemistry is a kind of important method of organic sewage purifying treatment, and its main principle is to utilize self-sow or through the microorganism organic substance that decomposes, eats of inoculation, reach the purpose of purifying waste water.Biochemical reaction is generally at groove of being made by materials such as metal, glass reinforced plastic or jar shape reactor, or carries out in the reaction tank of being built by concrete material (aeration tank).In reactor (or pond), be equipped with active sludge, and after connecting a settling bath (or pond), reactor (or pond) back just constitutes the treatment process of activated sludge process, sewage carries out biochemical reaction after entering reactor, and the suspension liquid that contains mud behind biochemical reaction overflows from reactor and enters settling bath and precipitate.A mud part that sinks to bottom land is as the bacterial classification Returning reactor, and another part is that excess sludge is discharged, and the supernatant liquor that settling bath overflows is for purifying waste water.In reactor, placed for the sewage treatment process that then can constitute the microbial film contact oxidation method behind the filler of microorganism colonization.

When normally moving, higher level of automation is arranged with the biochemical sewage treatment device that other necessary utility appliance constitutes by above-mentioned reactor (or pond), settling bath (or pond), be applied to have in the sewage disposal of certain quantity discharged comparative maturity throughout the year.Yet as the major equipment in the device, but there are following many shortcomings in reactor or reaction tank:

Laid down cost is higher, and especially the investment of centering Small Sewage Treatment Equipment is too big;

Production cycle is long;

Reactor transportation difficulty, the reactor that reaction tank or volume are bigger generally all needs built on-site, can not or be difficult to be made and transported to the user by special producer as the product of series;

To stop completely during maintenance, big to the influence of producing;

Need deal with serious etching problem by the reactor that metallic substance is made;

Owing to be subjected to the limitation of settling bath (or pond) precipitation ability, the activated sludge concentration of decision reaction efficiency is restricted in the biochemical reactor (or pond) of activated sludge process;

On the technology difficult deal with to expand because of thread fungus make problem of water quality deterioration or the like.

The purpose of this invention is to provide a kind of novel biochemical reactor, it can overcome the above-mentioned shortcoming that is existed by the biochemical reactor or the reaction tank of the construction of " rigidity " material effectively;

And a kind of active sludge organic wastewater treatment that adopts biochemical reactor provided by the invention is provided, present method not only can be save settling bath (or pond) or dwindle its volume greatly, and can increase substantially concentration of activated sludge.

Reactor provided by the invention is characterised in that it is a kind of bag-like container of being made by flexible material, this flexible material can be as the chemical fibre rubber fabric of densification or chemical fibre impregnation non-woven fabrics, or waterproof or impermeable materials such as plastics and rubber enhancing cloth; Also can be chemical fibre rubber fabric or chemical fibre impregnation non-woven fabrics, or porous plastics and rubber enhancing cloth etc. be permeable or the material of infiltration as chemical ﹠ blended fabric, nonwoven fabric of synthetic fibre, non-densification.

Bag shape reactor can be installed on the support during use, and the bag end contacts with ground or other bearing surface, and so as to supporting the weight of water body in the reactor.Can put active sludge or biologic packing material in the bag, also can settle aerating apparatus or whipping appts, can be used for the sewage treatment process of activated sludge process or microbial film contact oxidation method.

When adopt respectively all be permeable or infiltration, all be waterproof or impermeable material, partly be flexible material permeable or that seep water when making, can become the biochemical reactor of multiple difference in functionality:

When reactor is made by material permeable or infiltration, will become a kind of reactor that has filtering function simultaneously concurrently.The sewage that enters reactor penetrates reactor from the bag wall after biochemical reaction purifies, suspended solids such as mud, biomass then are retained in the bag.The excessive mud of propagation is discharged by the mud discharging mouth at the bottom of being arranged at bag, the sucking-off in the bag of also available " U " shape pipe or pump.In order to guarantee that bag wall has good water-permeable all the time, aeration head can be designed to have the function of air-brush, be the permeable or seepage part that aeration head is positioned at reactor wall, air-flow forms air-brush and sprays to a bag wall, and the suspended substances such as biomass that are attached to bag wall will be by stripping.In addition, a kind of commentaries on classics also can be set and brush the dirt settling that cleans on bag wall in bag.

When reactor is made by waterproof or impermeable flexible material, can then become the batch reactor of the biochemical sewage treatment of a kind of sequence batch (by the procedure operation of water inlet → aeration (or not aeration) biochemical reaction → precipitation → discharging supernatant liquor.

When reactor adopts part flexible material permeable or infiltration to make, waterproof as the permeable Lower Half of the first half, and only to the oxygenation of first half water body, and the Lower Half water body becomes anoxic or anaerobic state naturally, it is aerobic then can to form top in a bag, bottom anoxybiotic A/O system, a bag wall of purifying waste water then by top appears reactor.

Waterproof as top, the bottom is permeable, and sewage enters from sack, and purifying waste water penetrates reactor from the bottom, can guarantee that then sewage and microorganism have the enough reaction times.

Adopt a plurality of bags of shape reactors in series, and only some bag is carried out aeration, the part bag becomes aerobic, and the part bag becomes anoxic or anaerobism, the A "/O " system of the many pocket types of one-tenth then capable of being combined.

As to the reactor oxygen deprivation, then become anoxic or anaerobic biochemical reactor, further can become a kind of biochemical reactor that produces biogas.

For the control permeation rate, also reactor design can be become double wall or part double walled structure.

Use this biochemical reactor and also can realize other technologies such as A.B method.

The invention has the advantages that reactor made by above-mentioned flexible material, thereby manufacturing cost is much lower than metal or glass-reinforced plastic material.Folding characteristics greatly facilitate transportation, can be produced as tandem product by special producer fully.

Substantially free from corrosion problem can be changed after the bag breakage easily.

Reactor is easy for installation, and the construction investment of waste disposal plant, production cycle obviously reduce and shorten.

Can easily and flexibly a plurality of reactors be carried out serial or parallel connection, make device can arbitrarily adapt to different treatment capacities, and can keep in repair single reactor one by one, with the influence of avoiding stopping and bringing completely to production.

When the reactor employing all is or partly makes for the material of permeable or infiltration, the sewage treatment process that constitutes can be save settling bath (or pond) or dwindle the volume in settling bath (or pond) greatly, and can increase substantially the concentration of microorganism in the reactor, the efficient of reactor will improve greatly.

What accompanying drawing was showed is a kind of structure example of biochemical reactor provided by the invention, and the flow process signal of adopting the formed activated sludge process organic wastewater treatment of this reactor.

1 is the bag wall of bag shape reactor among the figure, and it adopts the polyvinyl canvas with water-permeable to make, and sack is fixed on the support 2.Bag is equipped with a row aeration tube 3 in one week of inwall, and the air-flow of aeration tube ejection will wash away the inwall of bag, remains good water-permeable to guarantee the bag wall, and water body is carried out oxygenation.

Sewage enters reactor by sack, with be purified behind the microbial reaction in the active sludge in the bag, purify waste water and penetrate reactor by the bag wall, and press the weir water reservoir 5 of the direction longshore current accumulation of arrow 4 in reactor bottom, 6 discharges from the waterways then, superfluous mud is then discharged by mud discharging mouth 7.

The bottom of bag shape reactor contacts with the water reservoir bottom fully, and reactor and water body are fully by load-bearing at the bottom of the water reservoir pond.

Claims

1, a kind of biochemical reactor that is used for the biochemical treatment organic sewage is characterized in that it is a bag-like container of being made by flexible material.

2,, it is characterized in that described flexible material is a flexible material permeable or infiltration according to the described reactor of claim 1.

3,, it is characterized in that described flexible material is fine and close waterproof flexible material according to the described reactor of claim 1.

4, according to the described reactor of claim 1, it is characterized in that described bag-like container part made by flexible material permeable or infiltration, part is made by the waterproof or impermeable flexible material of densification.

5, according to claim 2 or 4 described reactors, it is characterized in that described flexible material permeable or infiltration is the chemical fibre rubber fabric or the chemical fibre impregnation non-woven fabrics of chemical ﹠ blended fabric, nonwoven fabric of synthetic fibre, non-densification, or porous plastics and rubber enhancing cloth.

6, according to claim 3 or 4 described reactors, it is characterized in that the waterproof or impermeable flexible material of described densification is fine and close chemical fibre rubber fabric or chemical fibre impregnation non-woven fabrics, or plastics and rubber enhancing cloth.

7, a kind of method of biochemical treatment organic sewage, it is characterized in that biochemical reaction carries out in as claim 2 or 4 described reactors, water body in the reactor contains self-sow or the microorganism through inoculating, filler, whipping appts and aeration aerating device also can be housed in the reactor, organic sewage enters reactor from sack or bag wall, behind biochemical reaction, purify waste water from the bag wall that permeable or infiltration part appears reactor, suspended solids such as mud are retained in the bag, and are discharged or managed or pump sucking-off in the bag with " U " shape by the mud discharging mouth of bag bottom.

8, according to the method for the described processing organic sewage of claim 7, it is characterized in that the permeable or seepage part of described reactor wall is equipped with aeration head, air-flow forms air-brush and sprays to a bag wall, in order to remove the dirt settling on the bag wall.