CN100513329C - Domestic sewage treating underflow ecological bed method and apparatus - Google Patents

Abstract

Domestic sewage treating underflow ecological bed method and apparatus is disclosed. Sewage is first treated in an anaerobic tank to eliminate BOD5, COD and SS; then treated in a biological carbon filter to provide carbon source for lowering nitrogen content, and treated in novel underflow ecological bed to eliminate nitride, phosphide, BOD5, COD, SS; and other pollutant; and finally gathered in a recovering pond for reuse or draining. The present invention solves the problems of no-power oxygen supply, jamming prevention, self purification, etc. of underflow ecological bed below thick soil layer, and the sewage treating system has simple operation, unmanned management, continuous running and high purifying effect.

Description

A kind of domestic sewage treating underflow ecological bed method and device

Technical field

The present invention relates to the technology of sanitary sewage disposal, particularly a kind of device that utilizes domestic sewage treating underflow ecological bed method and realize this method.

Background technology

The technology of the present composite ecological bed processing sanitary sewage of undercurrent type that uses, only can handle the rural area sewage of low concentration, this method filtrate adopts cinder, the top layer is the thick earthing of 10cm, plant the water and soil plant above, root system of plant gos deep into filtering layer and absorbs nutrient, and oxygen can be discharged in the filtering layer by root, but because earthing is very shallow, sewage can only see through the 10cm earthing, the plantation plant variety only limits to waterplant, if be used in the city resident sub-district and then influence view and health, because the urban cells sewage discharge all between subsurface 600mm-700mm, will cause composite ecological bed earthing dark excessively like this, in case earthing is dark excessively, filtering layer inside often is in anaerobic state, makes denitrogenation, dephosphorization effect subtracts greatly, influences depuration quality, and easily stop up the inconvenience maintenance.

Summary of the invention

Purpose of the present invention is exactly that a kind of domestic sewage treating underflow ecological bed method will be provided, it can solve underflow ecological bed unpowered oxygen supply under the very dark situation of earthing, problems such as anti-blocking and self-purification, thereby make the underflow ecological bed soil that in the sub-district, do not account for, do not influence landscape plant, can be in simultaneously the oxygen of the holding concurrently oxygen condition of becoming reconciled, can bring into play the effect of dephosphorization, denitrogenation, keep gravity flow and do not stop up the sustainable operation of energy self-purification.

Another object of the present invention just provides the device of this sewage water treatment method.

The object of the present invention is achieved like this: a kind of domestic sewage treating underflow ecological bed method, this method comprises the following steps:

A. sewage is removed BOD through anaerobic treatment pond 1 ₅, COD, SS;

B. enter biological carbon filter tank 3, reduce nitrogen in the sewage;

C. enter underflow ecological bed 6, water distributor 7 water distributions in ecological bed 6 upper stratas, sewage evenly flow in ecological bed 6, and air enters ecological bed 6 oxygen supplys through permeability cell 9, collect water outlet with the rising pipe C8 that is distributed in ecological bed 6 lower floors, be connected with downcomer 4 on the rising pipe B5, utilize the effect of bleeding of downcomer 4, replenish fresh air automatically, the rainwater of roofing cleaning both provided dissolved oxygen for sewage when raining, again can flushing pipe, make filtering layer reach self-purification, further reduce BOD by ecological bed 6 ₅, COD, SS, remove nitrogen phosphorus simultaneously;

D. the water of Chu Liing enters pond for recovering 11, through sterilization, reuse or discharging;

A kind of device that is used to realize domestic sewage treating underflow ecological bed method, this device comprises:

An anaerobic treatment pond 1, anaerobic treatment pond 1 is an all-sealed structure, the rising pipe A2 in anaerobic treatment pond 1 stretches in the biological carbon filter tank 3;

A biological carbon filter tank 3 is filled with the machine biomaterial and makes filtrate in the biological carbon filter tank 3, it is underflow ecological bed 6 that the rising pipe B5 in biological carbon filter tank 3 stretches into, and also is connected with downcomer 4 on the rising pipe B5;

One underflow ecological bed 6, ecological bed 6 bottoms are concrete, up be followed successively by rubble, cinder, rubble and banket, between ecological bed 6 upper strata cinders and rubble, be furnished with water distributor 7, the permeability cell 9 that stretches in water distributor 7 and the pump well 10 communicates, be furnished with rising pipe C8 in ecological bed 6 the bottom metalling, rising pipe C8 stretches into pond for recovering 11;

A pump well 10, the permeability cell 9 in the pump well 10 stretch into ecological bed 6 water distributors 7 interior and in ecological bed 6 and communicate, and permeability cell 9 also communicates with downcomer 4;

A pond for recovering 11;

Water distributor, permeability cell and rising pipe in wherein underflow ecological bed all adopt flexible porous tube.

Flexible porous tube wall adopts high-strength nickel, Chrome metal powder high-carbon steel wire, covers the PVC protective layer outside after antirust processings of phosphoric acid, can prevent acid and alkali corrosion, and the steel wire spiral strengthening body structure of uniqueness guarantees that tube wall surface is smooth, and bears corresponding soil pressure.

The filtering layer of flexible porous tube wall adopts geotechnological non-woven fabrics as filtering layer, guarantees effectively to filter and prevents that settling from entering in the pipe, and the warp thread of filter cloth adopts the how imperial yarn of high-strength Z-TEK to cover PVC outward up and down, and weft yarn adopts specialty fibers, forms enough tensile strength.

Because flexible porous tube high water-permeability, can make the water inlet water distribution even, water outlet is catchmented also even, and permeability cell enters fresh air from ecological bed end, air communicates with water distributor through permeability cell, and communicate greater than 50% cinder layer with porosity, air contacts with sewage through filtering layer, because specific surface area is big, gas-liquid exchange usefulness improves greatly, make filtering layer be in double oxygen, in the aerobic state, energy is dephosphorization effectively, denitrogenation, air communicates with downcomer through ecological bed front portion, utilizes the effect of bleeding of downcomer on the one hand, automatically replenish fresh air, on the other hand, when raining the rainwater of roofing cleaning both for sewage provides dissolved oxygen, again can flushing pipe and filtering layer reach self-purification, can not stop up, but water outlet is through sterilization reuse or discharging.

General 400mm～the 2000mm of underflow ecological bed earthing can go deep into ecological bed absorption moisture content and nutrition by the root system of arbor, and discharges oxygen by root.

The present invention compared with prior art has the following advantages and effect:

1, finishes water treatment process, saves the energy, need not maintenance usually by flow by gravity, give the clear primary slag for the treatment of part 2-3, clear slag can be used as subdistrict greening fertilizer, makes the material of sub-district form benign cycle, does not need the sewage disposal running cost usually.

2, sewage can effectively be removed pollutents such as nitrogen, phosphorus through anaerobism, hold concurrently oxygen and aerobic treatment, and oxygen supply realizes unpowered natural oxygen supply, utilizes root system of plant to go deep into ecological bed absorption nutrient simultaneously, discharges oxygen and removes pollutent.

3, but water outlet reuse conserve water resource does not account for the soil, can be used for greening.

4, save the great amount of investment and the operational management expense of sewage work.

Description of drawings

Describe in further detail below in conjunction with accompanying drawing and description of drawings.

Fig. 1 is a waste disposal plant structural representation of the present invention.

Fig. 1 double as Figure of abstract.

Among the figure: 1, anaerobic treatment pond, 2, rising pipe A, 3, the biological carbon filter tank, 4, downcomer, 5, rising pipe B, 6, underflow ecological bed, 7, water distributor, 8, rising pipe C, 9, permeability cell, 10, pump well, 11, pond for recovering.

Embodiment

As shown in Figure 1, sewage at first carries out pre-treatment through anaerobic treatment pond 1, and anaerobic treatment pond 1 is water-proof material or the mixed all-sealed structure of making of brick, and the natural therein anaerobically fermenting of sewage is removed BOD ₅, COD, SS be after rising pipe A2 enters biological carbon filter tank 3, make for water-proof material or brick mix in biological carbon filter tank 3, organic-biological materials such as bamboo and wood, pine tree fruit, reed, nut-shell have been dosed in it as filtrate, these material specific surface areas are big, both can form microbial film, again can be for denitrogenation provide carbon source, the content of nitrogen and phosphorus enters novel underflow ecological bed 6 through rising pipe B5 in the reduction sewage; Novel underflow ecological bed 6 is that water-proof material or brick are mixed makes, the thick concrete of 100mm is filled out in the bottom, up dose the thick rubble of 100mm successively, the cinder that 400mm is thick, the rubble that 100mm is thick, banket again to ground, sewage is furnished with water distributor 7 between ecological bed 6 cinders and rubble and enters ecological bed 6, the pipe intensity of water distributor 7 is looked ecological bed 6 size and is increased and decreased, and current are undercurrent type, are furnished with rising pipe C8 in the ecological bed 6 bottom metallings, permeability cell 9 in the pump well 10 stretches in ecological bed 6, and communicate with water distributor 7, oxygen is provided, thus the BOD in the degradation of sewage ₅, COD, denitrogenate pollutents such as dephosphorization, owing to also be connected with downcomer 4 on the rising pipe B5, so also can utilize the effect of bleeding of downcomer 4, automatically replenish fresh air, on the other hand, the rainwater of roofing cleaning both provided dissolved oxygen for sewage when raining, again can flushing pipe, make filtering layer reach the purpose of self-purification.Water after self-cleaning is handled imports among ecological bed 6 the rising pipe C8, enters in the pond for recovering 11, adds disinfecting substance and further water is handled in pond for recovering 11, and last water outlet reaches emission request or reuse.

The anaerobic treatment pond 1 that sewage pre-treatment of the present invention is adopted can be the marsh gas purifying pond or other can realize the fermentation vat of anaerobically fermenting.

Adopt example of the present invention

With the sanitary sewage disposal example of the inventive method to the third stage of the project sub-district, Rizhao City professor garden, Shandong

Professor's garden the third stage of the project is taken up an area of 39.6 hectares, resident population 6500 people, and this sub-district belongs to travel in holiday character, and throughout the year average occupancy rate is about 30%, the annual actual water 325580m that needs ³/ y wherein discharges sanitary sewage 221551m ³/ y, after the present invention disposes of sewage, wastewater treatment rate 100%, the water reclamation rate is 57.3% in the reality, and total water-saving rate was 39% in actual year, can save 247439 yuan/year of charges for water every year, year is saved 227906 yuan/year of sewage disposal expenses, saves sewage treatment project and takes 1992000 yuan.

Claims (2)

1, a kind of domestic sewage treating underflow ecological bed method is characterized in that this method comprises the following steps;

A. sewage is removed BOD through anaerobic treatment pond (1) ₅, COD, SS;

B. enter biological carbon filter tank (3), reduce nitrogen in the sewage;

C. enter underflow ecological bed (6), water distributor (7) water distribution in ecological bed (6) upper strata, sewage evenly flows in ecological bed (6), air enters ecological bed (6) oxygen supply through permeability cell (9), rising pipe C (8) in ecological bed with being distributed in (6) lower floor collects water outlet, be connected with downcomer (4) on the rising pipe B (5), utilize the effect of bleeding of downcomer (4), automatically replenish fresh air, the rainwater of roofing cleaning both provided dissolved oxygen for sewage when raining, again can flushing pipe, make filtering layer reach self-purification, further reduce BOD by ecological bed (6) ₅, COD, SS, remove nitrogen phosphorus simultaneously;

D. the water of Chu Liing enters pond for recovering (11), through sterilization, reuse or discharging;

Water distributor, permeability cell and rising pipe in wherein underflow ecological bed all adopt flexible porous tube.

2, a kind of device that is used to realize the method for claim 1 is characterized in that this device comprises:

An anaerobic treatment pond (1), anaerobic treatment pond (1) is all-sealed structure, the rising pipe A (2) of anaerobic treatment pond (1) stretches in the biological carbon filter tank (3);

A biological carbon filter tank (3) is filled with the machine biomaterial in biological carbon filter tank (3) and makes filtrate, and the rising pipe B (5) of biological carbon filter tank (3) stretches into underflow ecological bed (6), also is connected with downcomer (4) on the rising pipe B (5);

One underflow ecological bed (6), ecological bed (6) bottom is a concrete, up be followed successively by rubble, cinder, rubble and banket, between ecological bed (6) upper strata cinder and rubble, be furnished with water distributor (7), the permeability cell (9) that stretches in water distributor (7) and the pump well (10) communicates, be furnished with rising pipe C (8) in the bottom metalling of ecological bed (6), rising pipe C (8) stretches into pond for recovering (11);

Permeability cell (9) in the pump well (10), pump well (10) stretches into ecological bed (6) water distributors (7) interior and in ecological bed (6) and communicates, and permeability cell (9) also communicates with downcomer (4);

A pond for recovering (11);

Water distributor, permeability cell and rising pipe in wherein underflow ecological bed all adopt flexible porous tube.

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