CN105315020A

CN105315020A - Method being suitable for waste water treatment to produce fertilizer

Info

Publication number: CN105315020A
Application number: CN201410281851.8A
Authority: CN
Inventors: 高嵩
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-06-23
Filing date: 2014-06-23
Publication date: 2016-02-10

Abstract

A method being suitable for waste water treatment to produce a fertilizer includes the steps of: filtering domestic waste water through boiler ash to obtain clean water; adding an enzyme #3 to the boiler ash, in which sewage is blocked, to prepare the fertilizer, wherein the boiler ash contains 30-60% by weight of carbon and the other main components of the boiler ash include silicon dioxide, aluminum oxide and microelements, and the boil ash is 0.2-2 mm in granular size. Straw is employed for bedding the boiler ash. The filter layer is 400-800 mm in thickness and the bedding layer is 40-60 mm in thickness. The domestic waste water flows through the filter layer and then the bedding layer at 10-30 m/s from top to bottom. The fermentation temperature is 30-60 DEG C and fermentation time is more than 15 days.

Description

A kind of method being applicable to making manure by sewage treatment

Technical field

The invention belongs to sewage treatment area, also belong to fertilizer preparation field.

Background technology

China's discharge every day industry and sanitary sewage about 200,000,000 tons, wherein more than 90% through any process, and direct polluted-water is more than 2,000,000,000 meters ³.At present typical municipal sewage plant belongs to second-stage treatment, with physics biochemical process and gravitational settling method for basic means, by the suspended matter in the processing step removal water such as precipitation, aeration and colloidalmaterial.Because 99.9% (weight) is water in sewage, this treatment plant takes up an area huge, adds sewage transport engineering, makes the cost of urban sewage treatment system very expensive.In addition, cannot remove the pollutent-mineral nutrient be dissolved in sewage through this second-stage treatment, draining still has the problem of nutrient loss and polluted-water.Tertiary treatment adopts quartz sand, cobble etc. for the filtration of filter bed material, activated carbon adsorption, can address this problem, but must regularly recoil and regeneration, and involves great expense, and in the world up to the present, what really put into operation is considerably less.

On the other hand, for improving crop yield, the very expensive chemical fertilizer of a large amount of price is used in soil year after year, causes soil compaction, dysplasia.

Again on the one hand, for reducing topsoil, the whole nation reaches tens million of ton from burning the boiler smoke collected the boiler exhaust gas of coal cinder every year, and these cigarette ashes, in stacking, transportation, cause secondary pollution unavoidably.

Summary of the invention

The object of the invention is to solve the problems referred to above of prior art, a kind of method utilizing boiler smoke to dispose of sewage to produce fertilizer is provided.

The boiler smoke retaining dirt, for sanitary sewage is filtered to obtain water purification through boiler smoke, is added ferment No. 3 fermentation and obtains fertilizer by method of the present invention.

The method particularly preferably sewage is first filled with air between filtering through boiler smoke, impels the phosphoric acid salt crystallization be dissolved in sewage, and provides required dissolved oxygen content for later fermentation step, and particularly advantageously sewage is through at least two-stage mixing wastewater with air inflation.In addition, in order to remove larger solid dirt in advance, can by sewage first through a grid initial filter, ' grid mesh can at 10 × 10-20 × 20mm, the comb formula device also can made with spacing 5-15mm parallel metal bar.

Present method boiler smoke used particularly carbon content is 30-60% (weight), all the other main chemical compositions of ash are silicon-dioxide, aluminium sesquioxide and part trace element, granularity 0.2-2 millimeter, the cigarette ash of the grate firing boiler smoke evacuation collection of available burning coal cinder, also can use as cigarette ash bedding and padding made by straw.Preferred pad thickness 40-60 millimeter, the thick 400-800 millimeter of filtering layer, sanitary sewage flows through filtering layer, bed course from top to bottom with the speed of 10-30 m/h.

Particularly the boiler smoke retaining dirt can be added wood chip or sugared slag class height carbon species in present method, fermentation raw material is contained:

Wood chip or sugared slag class height carbon species 10-25% (weight)

Ferment No. 3 0.1-0.5% (weight)

Water 40-60% (weight)

Filtrate, bedding and padding, dirt 25-40% (weight) leavening temperature 30-60 DEG C, fermentation time more than 15 days, particularly 15-20 days, to chocolate, odorless, bear white hair time obtained fertilizer, stir 2-3 time between yeast phase.

Method equipment used of the present invention comprises strainer and mixed fermentation pond, particularly also can comprise gas and water mixer.

In a preferred scheme of the present invention, equipment of the present invention comprises the preliminary filter of band grid, multistage gas and water mixer, sewage is sent into the pump of gas and water mixer from preliminary filter, receive the sewage lagoon from the sewage of gas and water mixer, the strainer of boiler smoke filtering layer is housed, sewage is sent into the pump of strainer from sewage lagoon, and the fermentation vat retaining the filtrate of dirt etc. taken out in splendid attire strainer.

Major advantage of the present invention is as follows:

1, the treatment of wastes with processes of wastes against one another, boiler smoke, sanitary sewage, wood chip etc. are all refuses, and cause environmental pollution, use boiler smoke filter sewage, both taken full advantage of waste material, again comprehensive regulation environment, and existing social benefit, has an economic benefit again.

2, change is given up as fertilizer, expands the source of manure, and the fertilizer that this method is produced, containing multiple nutritional components, can also improve soil;

3, raw material sources are extensive, and cheaply, product fertilizer demand amount is large;

4, sewage is processed in flowing fast, and efficiency is high, effective, and strainer does not need back flushing, convenient operation and management;

5, can in the rivers discharge outlet Chu Jian sewage work of existing sewage with the present invention, take up an area few, device structure is simple, and efficiency is high, profitable, easily implements.

The present invention is further illustrated below by embodiment.

Label; 1 is preliminary filter, and 2 is pump, and 3 is multistage inhaling type aerator, 4 is sewage lagoon, and 5 is pump, and 6 is pressure filter, 7 is mixed fermentation pond, and 8 is waste pipe, and 9 is pure water pipe, 11 is sewage inlet, and 12 is one-level suction opening, and 13 is first order jet nozzle, 14 is secondary nozzle, 15 is three grades of nozzles, and 16 be three grades of suction openinies 17 is level Four nozzle, and 18 is secondary suction opening.

Embodiment 1

In existing day, the town domestic sewage discharge outlet of water displacement about 2000 tons sets up treatment plant.The major equipment needed has; Submerged sewage pump 2, in-line pump 2;>=10 meters ³sewage lagoon one; φ 2000 × h2600mm pressure filter 2; Filtering velocity gets 10-20 m/h; 5 meters ³fermentation vat 6; (solid amount TS)≤1000 mg/litre of sewage inlet; TS≤50 mg/litre of draining, daily output fertilizer 2-3 ton.

Embodiment 2

One or more multistage inhaling type aerator 3 is squeezed into by pump 2 after preliminary filter 1 initial filter of sanitary sewage band grid, water is repeatedly with the at different levels nozzles 13 of the flow velocity of 15-20 meter per second from device 3, 14, 15, 17 ejections, form eddy current, and produce negative pressure, by air from suction opening 12, 18, 16 suck, air water fully mixes instantaneously, complete rapidly oxygen to the transfer in water, make dissolved oxygen (DO) >=6 mg/litre, salt soluble in water is impelled to form insoluble salt compound, multistage gas and water mixer 3 external diameter is greater than diameter of conveying pipe, axially long only about 1 meter, mixed water is to sewage lagoon 4, pressure filter 6 is squeezed into by pump 5, the straw bed course (straw long 20-40 millimeter) of strainer 6 built with 40-60 mm thick and the boiler smoke filtering layer of 400-800 mm thick, described filtrate is that the content that the grate firing boiler smoke evacuation of burning coal cinder is collected accounts for the boiler smoke of cigarette ash total amount 30-60%, all the other main chemical compositions of ash are silicon-dioxide, aluminium sesquioxide and part trace element, surmise 0.2-2 millimeter, the sewage carrying out self-pumping 5 flows through filtering layer from the top down with the filtering velocity of 10-30 m/h, bed course, due to contact, cohesion, permeation filtration, membrane filtration and adsorption, suspended matter in sanitary sewage, gelatinoid and be partly dissolved material and be trapped, be adsorbed in filtering layer, purification higher than second-stage treatment is discharged through water-freeing arrangement, send into water body or farmland, when filter differential pressure increases, water outlet is reduced to a certain degree, be considered as filtrate saturated, not back flushing, but stop giving water, after water is got rid of, by the filtrate in strainer, bedding and padding and dirt all send into mixed fermentation pond 7, filtrate, bedding and padding, dirt accounts for fermentation raw material gross weight 25-40%, mix with No. 3, the ferment accounting for the wood chip of fermentation raw material gross weight 10-25% or sugared slag class height carbon species and account for fermentation raw material gross weight 0.1-0.5%, the water content of raw material is made to account for the 40-60% of gross weight, be heated to 30 DEG C with top fermentation, (about need 5-6 days) as 40-60 DEG C to stir 1-2 time, build with plastic film, within 15-20 days, become chocolate, odorless, nutriment in a fertilizer is obtained complete when bearing white hair, the fertilizer that fertilizer efficiency is steady and long.

Claims

1. be applicable to a method for making manure by sewage treatment, it is characterized in that sanitary sewage to filter to obtain water purification through boiler smoke, the boiler smoke retaining dirt is added ferment No. 3 fermentation and obtain fertilizer; Described boiler smoke carbon content 30-60% (weight), all the other main components of ash are silicon-dioxide, aluminium sesquioxide and trace element, granularity 0.2-2 millimeter; Straw bedding and padding are used, the thick 400-800 millimeter of filtering layer, the thick 40-60 millimeter of bed course below described boiler smoke; Described sanitary sewage flows through filtering layer, bed course from top to bottom with the speed of 10-30 meter per second; Described leavening temperature is 30-60 DEG C, fermentation time more than 15 days.

2. method as claimed in claim 1, it is characterized in that first in sewage, being filled with air, then boiler smoke filters described sewage.

3. method as claimed in claim 1, is characterized in that sewage is first through a grid or comb initial filter.

4. method as claimed in claim 1, it is characterized in that the boiler smoke retaining dirt being added wood chip or sugared slag class height carbon species, fermentation raw material is contained: wood chip or sugared slag class height carbon species 10-25% (weight) ferment No. 3 0.1-0.5% (weight) water 40-60% (weight) filtrates, bedding and padding, dirt 25-40% (weight).