CN104418468A

CN104418468A - CASS (Cyclic Activated Sludge System) two-stage cell sewage treatment system

Info

Publication number: CN104418468A
Application number: CN201310406422.4A
Authority: CN
Inventors: 罗芳
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-09-10
Filing date: 2013-09-10
Publication date: 2015-03-18

Abstract

The invention discloses a CASS (Cyclic Activated Sludge System) two-stage cell sewage treatment system, comprising primary sewage treatment equipment and secondary sewage treatment equipment, wherein the primary sewage treatment equipment comprises a sand settling tank, a distribution well, a CASS reaction tank and a contact tank connected in series; and the secondary sewage treatment equipment comprises a sand-water separator connected with the sand settling tank, a storage tank connected with the CASS reaction tank and a sludge dehydration tank connected with the storage tank. The CASS two-stage cell sewage treatment system is simple in process flow and flexible in running manner, occupies a small space, can buffer the fluctuation of water quantity and water quality by changing the circulation time, has strong adaptability, and is very suitable for being popularized and applied in cells, campuses, industrial parks and the like.

Description

CASS two-stage small region sewage treatment system

Technical field

The invention belongs to field of environmental engineering, relate to a kind of CASS two-stage small region sewage treatment system.

Background technology

One residential is the relatively independent region with a kind of function or several functions, and its water exhaust system is not usually within Municipal pipe network coverage.According to the environmental protection standard of locality, independently sewage treatment facility must be set, the small region sewage treatment of Here it is our indication.

The processing power of community wastewater system, various countries there is no unified restriction.USSR (Union of Soviet Socialist Republics) once advised that the processing power of single structures was no more than 1400m3/d, and the U.S. is then limited to processing power in the scope of 3785m3/d.According to China's situation, advise sewage quantity to be defined as small region sewage treatment factory in the treatment plant of below 4000m3/d.

Community wastewater is different from municipal effluent (often comprising part trade effluent), belongs to sanitary sewage category.Its water quality and quantity feature can be summarized as: water quality and quantity changes greatly, and Pollutant levels are on the low side, namely low than municipal effluent, and Biodegradability of Wastewater is good, and intractability is little.

The function of water body that the treatment process of community wastewater enters because of sewage is different and different, and conventional treatment process has: reuse etc. of sterilizing after filtration again after septic tank, coagulation (primary sedimentation pond), biological second-stage treatment and second-stage treatment.

Built-up type treatment plant is once fashionable for a time, and built-up type process refers to standard equipment that is that assemble or that be easy to assembling, and its major advantage is that construction is fast, does not account for greenery patches.But practical application shows, there is many problems.As the maintenance management difficulty of equipment, to running condition examination inconvenience, the unit process water yield is limited, all needs time verifying work-ing life etc.

Cyclic Activated Sludge System (Cyclic Activated Sludge System is called for short CASS) is a kind of Novel sewage treatment process grown up on SBR basis.This technique is study successfully and the New Wastewater Treatment Technique applied in Sen Weirou wastewater treatment company of the U.S. and 1975 the earliest.

Summary of the invention

For solving the maintenance management difficulty of prior art equipment, to running condition examination inconvenience, the technological deficiency that the unit process water yield is limited, the invention provides a kind of CASS two-stage small region sewage treatment system.

CASS two-stage small region sewage treatment system, comprises one-level sewage disposal device and B-grade sewage treatment facility, and described one-level sewage disposal device comprises the settling pit, distributing well, CASS reaction tank and the contact tank that connect successively; Described B-grade sewage treatment facility comprises the grit water separator be connected with settling pit, the storage pool be connected with CASS reaction tank, and between the sludge dewatering be connected with storage pool.

Preferably, described settling pit comprises coarse rack settling pit and the fine fack settling pit be attached thereto.

Preferably, also comprise between the chlorination dosing be connected with contact tank.

Preferably, also comprise and the flushing pond be connected between sludge dewatering.

Preferably, the air blast machine room be connected with CASS reaction tank is also comprised.

Preferably, the grit water separator be connected with fine fack settling pit is also comprised.

CASS two-stage small region sewage treatment system of the present invention, technical process is simple, operation scheme is flexible, it is less to take up an area, and by changing the fluctuation cushioning the water yield, water quality cycling time, there is stronger adaptability, be highly suitable for community, campus, industrial park etc. and apply.

Accompanying drawing explanation;

Fig. 1 illustrates a kind of embodiment schematic diagram of the present invention.

Embodiment

Below the specific embodiment of the present invention is described in further detail.

Excellent field-electronic applications as shown in Figure 1, coagulation mainly adopts Physical to take out suspended substance and partial organic substances, its specific embodiment is that first the sewage of pipe network flow into the water management well that spouts, make sewage quantity and water quality adjusted, thus make sewage disposal reach stable equilibrium running; Again by sewage respectively by thick, fine fack, to cut the thick suspended substance of resistance; Then in settling pit, utilize gravity separation principle, separated by the larger inorganic particles such as the sand grains in sewage, slag, sand suction machine, then by sand setting sucking-off, delivers to grit water separator.The effect of settling pit is separated by the grit in sewage, prevents it to the infringement of subsequent handling equipment, finally enter second-stage treatment.Second-stage treatment is on the basis of coagulation, colloid in further employing physico-chemical process removal sewage and dissolved matter, its main technique adopts CASS pond (comprising anaerobic pond, Aerobic Pond and settling tank) T skill biochemical treatment, comprise: first the sewage that coagulation is crossed enter anaerobic zone and carry out anaerobic treatment, after mud in anaerobic pond absorbs some objectionable impuritiess in sewage, sewage enters Aerobic Pond, there is provided the oxygen needed for microorganism by gas blower, be mixed into mixed solution with active sludge in pond; Then in aeration tank, pass through continuous, sufficient aeration, aeration makes active sludge be in suspended state on the one hand, fully contacts with waste water; On the other hand, by aeration, to active sludge oxygen supply, keep aerobic condition, make microorganism normal growth and breeding, by the metabolism of microorganism, make that organism is inorganization, toxic substance is innoxious; After sewage enters settling tank, the mud person who lives in exile sludge thickener after precipitation processes, and the supernatant liquor that wherein precipitated impurities is less is sent to anaerobic pond by sludge reflux pump again and carries out circular treatment.Through CASS pond, contact tank, then after chlorination, water now reaches discharging standards.

The a large amount of mud produced due to sewage work contain harmful, toxic substance, can have a negative impact to surrounding environment, so, timely treatment and disposal must be carried out to mud, make it decrement, stable, innoxious and can be fully utilized.The process of mud comprises digestion, the process such as concentrated.The raw sludge of preliminary sedimentation tank precipitation rises to gravity concentration tank by pump and concentrates.An active sludge part for sedimentation in secondary sedimentation tank is risen to the anaerobic zone in CASS pond by reflux pump, to increase activated sludge concentration; Another part rises to floatation thickening pond by pump.Mud after 2 concentration basins concentrate, rises to digester by dosing pump and carries out digestion process.Finally enter and be dehydrated into more dry mud between dehydration and can transport outward process.

Above-describedly be only the preferred embodiments of the present invention; described embodiment is also not used to limit scope of patent protection of the present invention; therefore the equivalent structure that every utilization specification sheets of the present invention and accompanying drawing content are done changes, and in like manner all should be included in protection scope of the present invention.

Claims

1.CASS two-stage small region sewage treatment system, is characterized in that, comprises one-level sewage disposal device and B-grade sewage treatment facility, and described one-level sewage disposal device comprises the settling pit, distributing well, CASS reaction tank and the contact tank that connect successively;

Described B-grade sewage treatment facility comprises the grit water separator be connected with settling pit, the storage pool be connected with CASS reaction tank, and between the sludge dewatering be connected with storage pool.

2. a CASS two-stage small region sewage treatment system as claimed in claim 1, is characterized in that, the fine fack settling pit that described settling pit comprises coarse rack settling pit and is attached thereto.

3. a CASS two-stage small region sewage treatment system as claimed in claim 1, is characterized in that, also comprises between the chlorination dosing that is connected with contact tank.

4. a CASS two-stage small region sewage treatment system as claimed in claim 1, is characterized in that, also comprise and the flushing pond be connected between sludge dewatering.

5. a CASS two-stage small region sewage treatment system as claimed in claim 1, is characterized in that,

Also comprise the air blast machine room be connected with CASS reaction tank.

6. a CASS two-stage small region sewage treatment system as claimed in claim 2, is characterized in that, also comprise the grit water separator be connected with fine fack settling pit.