CN101468849A

CN101468849A - Method for rapidly cultivating aerobic particle sludge by load control technique

Info

Publication number: CN101468849A
Application number: CNA200710301410XA
Authority: CN
Inventors: 竺建荣; 张铭川; 史晓慧; 孔云华
Original assignee: Beijing Normal University
Current assignee: Beijing Normal University
Priority date: 2007-12-27
Filing date: 2007-12-27
Publication date: 2009-07-01

Abstract

The invention relates to a method for rapidly culturing aerobic particle sludge through load modulation technology and belongs to the technical field of wastewater biotreatment. To solve the problems that the prior aerobic particle sludge culture technology is not perfect or accurate and has long time and the like, the invention provides a simple and stable method for culturing the aerobic particle sludge; the method comprises the following steps: common active sludge is taken out and is filled into a sequencing batch type bioreactor for idle aeration; after the settling property of the sludge is improved, the operating load of the sludge in the reactor is modulated; a floccule/particle mixture with better settling property appears at certain COD concentration; at the moment, load is rapidly declined so as to remove the floccule sludge in the reactor; and subsequently, the COD concentration of inlet water is modulated to change feed organic load or sludge load and promote the growth and stability of the aerobic particle sludge. According to the method, the aerobic particle sludge with good settling property, stable property and high activity can be obtained.

Description

Utilize the method for load control technique rapidly cultivating aerobic particle sludge

Technical field:

The present invention relates to the cultural method of aerobic particle mud in a kind of biological wastewater treatment field.Be specifically related to a kind of operation control techniques and operation Control essentials of in sequence batch (batch reactor (SBR) technology, cultivating aerobic particle mud.

Background technology:

In the present Sewage treatment systems, biological treatment is still the treatment process that environmental benefit is arranged most, is widely used in the processing of municipal effluent and trade effluent.And utilize aerobic particle mud to handle various objectionable impuritiess in the waste water are focuses of biological wastewater treatment in recent years.Compare with common activated sludge process, it is good that aerobic particle mud has a settling property, active high, the biomass concentration height, the advantage of strong shock resistance, and can improve the SBR system change water than and material reaction speed.At present, utilizing organic matter degradation that aerobic particle mud carries out organic pollutant COD removal, denitrogenation dephosphorizing and difficult degradation etc. all is research focuses of sewage treatment area, has very wide application future.

But, the forming process more complicated of aerobic particle mud, many technology operating parameters all can influence the formation and the character of granule sludge.How can turn out efficiently, stable granule sludge just becomes the emphasis of research.The present invention can turn out efficient, stable aerobic particle mud effectively with specific operating load control technique, does not relate to and also have in this former aerobic grain cultural method.

Summary of the invention:

Technical problem to be solved by this invention is the weak point that overcomes existing aerobic particle mud culture technique, and a kind of stable, simple, reliable method for culturing aerobic granular sludge is provided.

The present invention deals with problems by following technical scheme.It is characterized in that utilizing load control to cultivate aerobic particle mud.Mainly comprise the operation phase just, operating load regulation and control stage, and steady stage.Concrete steps are as follows:

1) gets common aerobic or anaerobic activated sludge, in the sequence batch (batch reactor (SBR) of packing into;

2) the required different concns waste water of configuration adds nutritive element by COD:N:P for the 100:5:1 mode in the waste water, and adds materials promotion particle growths such as sodium-chlor, calcium, magnesium, iron ion and peptone;

3) keep the SBR system to have sufficient aeration, the pH value is between 6.5 to 8.5, and hydraulic detention time is about 6-24 hour;

4) the first operation phase: the aerobic or anaerobic activated sludge to inoculation carries out " unloaded aeration ", improves the settling property of mud;

5) the operating load regulation and control stage: the operating load of mud in the regulation and control reactor-comprise organic loading or sludge loading, get rid of the flco mud in the reactor and make mud change into aerobic particle mud;

6) steady stage: load control a proper scope, is promoted the continuous growth of aerobic particle mud and stable.

The present invention has following technique effect:

1) utilizes the aerobic particle mud of turning out that the way of load control can be efficient, simple, stable, overcome the uncertain factor that previous cultural method is cultivated aerobic particle mud, and improved the stability of granule sludge.

2) can select and change operator scheme flexibly, to adapt to wastewater treatment of different nature.

3) operation is simple, do not need to change structure of reactor, can adopt the inoculation of conventional active sludge or residual active sludge, do not need complicated operations control.

Description of drawings:

Fig. 1 forms synoptic diagram for reactor of the present invention

1-sequence bioreactor main reactor wherein

2-water inlet distribution reservoir

3-water inlet water pump

4-water outlet water pump

The water outlet of 5-reactor

6-air compressor

7-aerating apparatus

8-fluid level controller

9-PLC time controller

10-mud discharging mouth

Solid line-reactor water route

Dotted line-reactor circuit

Fig. 2 is a process flow diagram of the present invention

Fig. 3 is a cultivation results synoptic diagram of the present invention

Embodiment:

The first operation phase: sequence bioreactor seed sludge (can be conventional flco shape aerobic activated sludge or residue anaerobically digested sludge), take the powerful measure of " unloaded aeration " to improve initial sludge settling property, the matrix of just intaking is that organic loading is zero, and water inlet and draining are by normal running.Because lack nutraceutical matrix in the charging, sludge microbe carries out endogenous respiration, the self-dissolving of part microorganism is decomposed; Simultaneously, the microbial activities ability reduces, and tends to assemble growth.One all left and right sides mud flco diminishes, and settling property improves greatly, and SS and SVI value significantly descend, the mud denser that becomes, and settling property improves.

The operating load regulation and control stage: after the preliminary improvement of sludge quality, the sbr reactor device recovers normal operation.Progressively improve reactor load, the beginning influent concentration is less, and reactor is in low nutritional status relatively, and sludge concentration increases few.When water inlet COD further increases, sludge concentration phenomenal growth, the also stable higher level that remains on of COD clearance.The interior mud of reactor this moment becomes closely knit, has some fine particles to occur, and the settling property of mud continues to improve, and settling velocity obviously increases, though sludge quantity is more in the reactor, granular sludge is incomplete.Further improve charging and sludge concentration afterwards.Reactor moves under high loading, and the microbial nutrition load of SBR at the beginning of the cycle of operation is very high, bacterium vigorous growth, and mud is bred in a large number in the reactor, and sludge concentration increases sharply.Reactor enters the load shedding operation phase then, and considerable change appears in the interior mud of reactor this moment, and the mud small-particle constantly occurs, and in very short for some time (in the about week), mud transforms and be completed into particulate state mud fast.

Steady stage: after the granulating, sludge settling property greatly improves fully, and sludge concentration maintains the level of higher concentration.For keeping the stable growth of reactor endoparticle mud, feed loading or sludge loading are suitably improving and to remain on certain value constant, granule sludge stable growth under suitable operating load like this, it is closely knit finally to have formed structure, particle diameter is bigger, and has the aerobic particle mud of powerful metabolic activity.

Claims

1, a kind of method of utilizing the load control technique rapidly cultivating aerobic particle sludge.It is characterized in that described method comprises the steps:

2) the required different concns waste water of configuration, waste water should be controlled suitable main nutrient elements ratio (as being 100:5:1 by COD:N:P) in principle, and suitably replenishes other nutritive element (as materials such as sodium-chlor, calcium, magnesium, iron ion and peptones) promotion particle growth;

6) steady stage: load control a proper scope, is promoted the continuous growth of aerobic particle mud and stable,

2, a kind of method of utilizing load control to cultivate aerobic particle mud according to claim 1 is characterized in that: in the SBR system, realize the cultivation and the growth of aerobic particle mud,

3, a kind of method of utilizing load control to cultivate aerobic particle mud according to claim 1 is characterized in that; Carry out " unloaded aeration " to improve the mud performance behind the inoculation aerobic sludge.Adopt the operating load control methods that aerobic particle mud is produced afterwards,

4, a kind of method of utilizing load control to cultivate aerobic particle mud according to claim 1 is characterized in that: after granule sludge occurred, further the regulation and control load was got rid of the flco mud in the reactor, the complete granulating of mud in the accelerating system,

5, a kind of method of utilizing load control to cultivate aerobic particle mud according to claim 1 is characterized in that: after complete granular granule sludge occurring, regulate and control to guarantee the stable growth of mud by load and other condition.