CN106962249A - A kind of method that utilization excess sludge prepares multifunction manual reef - Google Patents
A kind of method that utilization excess sludge prepares multifunction manual reef Download PDFInfo
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Abstract
The invention discloses a kind of method that utilization excess sludge prepares multifunction manual reef.Its preparation for being related to marine ecology reef and the utilization of sludge.Step is：1st, the additives such as nano barium titanate calcium are added in sludge, heating response, separation obtains solid A and liquid A；2nd, solid A adjusts pH value, and separation obtains liquid B and solid B；3rd, liquid A and liquid B mixing, adjust pH value, and separation obtains solid C and liquid C；4th, add catalyst in liquid C, add diatomite, stir, separation obtains solid D and liquid D；5th, solid B vacuum heats, obtain E；6th, solid C and solid D mixing, is granulated, and calcining obtains bead；7th, E and bead and cement, the water mixed-forming of liquid D have been soaked, the artificial reef with Adsorption of Heavy Metals and sustained release nutriment is obtained.This method twice laid, non-secondary pollution can be used for ecological islands and reefs construction, the construction of aquafarm and marine ecology recovery etc..
Description
Technical field
The invention belongs to marine ecology field, and in particular to a kind of excess sludge of utilization municipal sewage plant prepares many
The method of function artificial reef.
Background technology
Since last century, with environmental pollution and the transition of the mankind fish for etc. the reason marine eco-environment receive it is serious broken
Bad, islands and reefs and offshore sea waters Desertification are protruded.In order to recover marine ecology, each state has all carried out a series of " Eco-Island
Reef " recovery project, carries out impaired island body, vegetation, water front, sandy beach and surrounding sea areas restoration of the ecosystem, and Efforts To Develop aquafarm
Build.Either ocean islands and reefs are built, or aquafarm construction, and it is that construction marine organisms rapid multiplying is dwelt to deliver artificial reef
Cease the important step on ground；While in order to accelerate the procreation of marine organisms, it is necessary to the appropriate nutriment continued to increase in seawater；Mesh
Before, constructing the material of reef includes steel, plastics, stone, concrete, rubber etc.（Tang Ming, Zhao Jinbo, high-performance sea-farming
The research of abalone Special artificial reef,《Concrete》, 2003,160（2）：3-6；Jinsong ZHANG etc., patent of invention, artificial reef,
ZL 201310543435.6）, these materials do not possess release nutriment, accelerate the effect of marine organism growth.Invention is special
Profit discloses a kind of method for improving attaching effect of algas on surface of artificial reef（Yu Zonghe etc., one kind improves artificial reef surface
The method of algae adhesion effect, ZL201110118155.1）, it is by the way that the material for preparing artificial reef is mixed with slow release fertilizer
Close, then pour shaping, product is made；Or pour artificial reef after shaping, coat the painting rich in slow release fertilizer on its surface
Layer, is made product, achieves certain achievement, but the nutrition salt component of this method addition is single, for enriching marine organisms
Species promotes deficiency, meanwhile, cost is also higher, limits its and widely applies.On the other hand, due to factors such as environmental pollutions,
The harmful substances such as the heavy metal element in some seawater can be exceeded, and these harmful substances can also influence recovery and the sea of marine ecology
The quality of product, but existing artificial islands and reefs material does not possess the ability of the harmful substances such as removing heavy metals.Marine ecology
Recover and mariculture practice in be badly in need of exploitation one kind can discharge nutriment, be capable of again Adsorption harmful substance, it is low
The ecological artificial reef of cost.
With urbanization modernization, urban wastewater discharge increases sharply, and in order to handle these waste water, builds substantial amounts of dirt
Water treatment plant, but sewage treatment plant inevitably produces substantial amounts of excess sludge, these excess sludges are such as handled not in time,
Pollute the environment.At present, various countries are frequently with the processing of the methods such as sanitary landfills, burning and compost.But the presence that these methods have
Environmental security hidden danger, some costs are high.Contain the metallic element such as substantial amounts of organic matter and copper zinc-iron, these organic matters in sludge
Based on biological residuum, rich in protein, many compositions therein are all valuable resources.Thus, actively inquire into the comprehensive of sludge
Application way is closed, turns waste into wealth, is the best outlet of sludge treatment.Liang Linhua and Liang Bin use quick lime modified sewage sludge, directly
With cement mixing, foaming agent is added, sludge foaming lightweight concrete is prepared（Patent of invention：At ZL200810171725.1, sludge
Reason method and the sludge foaming lightweight concrete and purposes of this method production）.Although this method fully utilizes sludge and is prepared for
Light foaming concrete, but this method needs extra addition foaming agent, old raising；Moreover, sludge components are complicated, impurity is not
Remove, the intensity and durability of concrete can be influenceed；3rd, the harmful substance such as heavy metal in sludge is not removed or solid well
Change, be mixed in concrete, as the weathering of concrete material comes off and dismounting in the future, environment can be entered, there is serious ring
Border pollution risk.
In order to prepare multifunctional ecological artificial reef, excess sludge is comprehensively utilized, the present invention provides a kind of using remaining dirty
A kind of clay standby artificial reef with nutrition slow-release and adsorption function.
The content of the invention
The purpose of the present invention, is to prepare a kind of multi-functional people with Adsorption of Heavy Metals purifying water body and release nutriment
Work reef, while comprehensively utilizing the excess sludge of municipal sewage plant.
The technical scheme of use is
A kind of method that utilization excess sludge prepares multifunction manual reef, it is characterised in that this method comprises the following steps：
1）Fresh excess sludge is taken, moisture content 80%-85% is adjusted, the 10%-20% of sludge quality diatomite, 0.5%- is added
5% nano barium titanate calcium and the hydrogen peroxide that 10%-20% weight/mass percentage composition is 30%, stir, are heated to micro-boiling 10-
20min, is 1Kg according still further to sludge quality and mixed acid volume ratio:1L ratios, add 0.5-1 mol/L nitric acid and 0.15-0.35
The mixed acid solution of mol/L phosphoric acid, stirs, be heated to 80-100 DEG C keep reaction 10-20min, separation of solid and liquid, consolidate
Body A and liquid A；
2）Solid is added water in the solid A that step 1 is obtained just to submerge, is stirred, with 1mol/L sodium hydroxide solution
The pH value 11-12 of liquid is adjusted, 80-100 DEG C is heated to, 10min is reacted, adds sodium hydroxide solution, make the pH value control of mixed liquor
System stands 6h-12h between 11-12, and separation of solid and liquid obtains liquid B and solid B；
3）Liquid B that the liquid A and step 2 that step 1 is obtained are obtained mixing, stirring reaction completely, then adjusts with alkali the pH of solution
It is worth for 6-8, stands 12-24h, separation of solid and liquid obtains solid C and liquid C；
4）It will add under the 0.1-1% of liquid C mass nano barium titanate calcium, ultraviolet light, stir in the liquid C obtained in step 3
Reaction 2-4h is mixed, the 2%-10% of liquid C mass diatomite is added, stirs, still aging 1h, separation of solid and liquid is obtained
Solid D and liquid D；
5）The weight/mass percentage composition that the quality such as solid B are added in the solid B that step 2 is obtained is 85% phosphoric acid, in 350-550
Under the conditions of DEG C, vacuum calcining 30-60min is cooled to room temperature, is washed to weakly acidic pH, drying, pulverizes and sieves, obtaining particle diameter is
0.2-2.5mm composite particles E;
6）The solid D mixing that the solid C and step 4 that step 3 is obtained are obtained, drying, ball milling 2-8h, water spray wetting, granulation takes grain
Footpath is 2-25mm bead, and drying calcines 20-40min in 950-1250 DEG C, obtains porous small ball;
7）The porous small ball that the composite particles E and step 6 that step 5 is obtained are obtained is soaked in the liquid D obtained in step 4
In, adsorption saturation, drying is 1 by the mass ratio of porous small ball, composite particles E and cement for construction in sea:0.01-0.1:0.2-0.3 ratios
Example feeding, is well mixed, then by water and cement quality ratio is 0.19-0.22:1, water is added, is stirred, is molded, maintenance 28
My god, obtain with absorption harmful heavy metal ions and release nutrition salt functional artificial reef, can be used for ecological islands and reefs construction,
The construction of aquafarm and marine ecology recovery etc..
Described sludge is the excess sludge during biochemical process processing sanitary sewage.
The alkali of addition in described step 3 is one kind or several in potassium hydroxide, calcium hydroxide, sodium hydroxide and ammoniacal liquor
Kind.
The a length of 254nm of ultraviolet light wave used during ultraviolet light irradiation in described step 4, irradiation intensity is to be not less than 100 μ
W/cm2。
It is an advantage of the current invention that while innoxious, comprehensive utilization of resources excess sludge, preparing cheap having and inhaling
The attached artificial reef for removing harmful heavy metal function and release nutriment, twice laid, energy-conserving and environment-protective, with very high environment
Benefit and economic benefit.
Brief description of the drawings
Fig. 1 is the process chart of this method.
Embodiment
Methods and techniques of the present invention are illustrated below by example.Nano-titanium used in the embodiment of the present invention
Sour calcium powder body is this laboratory by document（The preparation of Zhang Dong, Hou Ping nano barium titanate calcium powder bodies and its to lead in water and cadmium
Absorption behavior [J] chemistry journals, 2009, (12): 1336-1342）Method is synthesized.
Embodiment 1：The preparation of artificial reef 1
Take fresh excess sludge, adjust moisture content 81%, weigh 2Kg, add 400g diatomite, 20g nano barium titanate calcium and
300g weight/mass percentage compositions are 30% hydrogen peroxide, are stirred, and heat micro-boiling 10min, add 2L concentration respectively 1mol/L
With 0.15 mol/L nitric acid and the mixed acid solution of phosphoric acid, stir, be heated to 90 DEG C and keep reaction 20min, suction filtration is obtained
To solid A and liquid A；Solid is added water in the solid A that step 1 is obtained just to submerge, is stirred, with 1mol/L hydrogen-oxygen
Change the pH value 12 that sodium solution adjusts liquid, be heated to 90 DEG C, react 10min, add sodium hydroxide solution, make the pH value control of mixed liquor
System stands 6h 12, and suction filtration obtains liquid B and solid B；Liquid A and liquid B mixing, stirring reaction completely, then are adjusted with ammoniacal liquor
The pH value of whole solution is 7, stands 12h, and suction filtration obtains solid C and liquid C；The 0.5% of addition liquid C mass in liquid C
Nano barium titanate calcium, is 100 μ W/cm in irradiation intensity2, wavelength is under 254nm ultraviolet lights, stirring reaction 4h adds liquid
5% diatomite of body C mass, stirs, still aging 1h, and suction filtration obtains solid D and liquid D；It is solid by being added in solid B
The weight/mass percentage composition of the quality such as body B is 85% phosphoric acid, and under the conditions of 450 DEG C, vacuum calcining 40min is cooled to room temperature, water
Weakly acidic pH is washed till, dries, pulverizes and sieves, the composite particles E that particle diameter is 0.2-2.5mm is obtained；Solid C and solid D is mixed, dried
Dry, ball milling 6h, water spray wetting, granulation takes the bead that particle diameter is 2-25mm, and drying calcines 30min in 1050 DEG C, obtains porous
Bead.Composite particles E and porous small ball are soaked in liquid D, adsorption saturation, dried；In mass ratio, porous small ball is with being combined
The ratio of particle E and cement for construction in sea is 1:0.05:0.25 feeding, is well mixed, then by water and cement quality ratio is 0.20:1 ratio
Example, adds water, stirs, and the mould that injection size is 150mm*150mm*50mm, shaping is conserved 28 days, obtains having and inhales
The artificial reef 1 of attached harmful heavy metal ions and release nutrition salt functional.
Embodiment 2：The preparation of artificial reef 2
Fresh excess sludge is taken, moisture content 85% is adjusted, 2Kg is weighed, 400g diatomite, 100g nano barium titanate calcium is added
Hydrogen peroxide with 200g weight/mass percentage compositions are 30%, stirs, and heats micro-boiling 10min, adding 2L concentration is respectively
The mixed acid solution of 0.5mol/L and 0.35 mol/L nitric acid and phosphoric acid, stirs, and is heated to 80 DEG C and keeps reaction
10min, suction filtration obtains solid A and liquid A；Solid is added water in the solid A that step 1 is obtained just to submerge, and is stirred,
The pH value 12 of liquid is adjusted with 1mol/L sodium hydroxide solution, 80 DEG C is heated to, reacts 10min, add sodium hydroxide solution, make
The pH value control of mixed liquor stands 12h, suction filtration obtains liquid B and solid B 12；Liquid A and liquid B mixing, stirring reaction
Completely, then with sodium hydroxide the pH value for adjusting solution is 8, stands 24h, suction filtration obtains solid C and liquid C；Add in liquid C
Enter 0.1% nano barium titanate calcium of liquid C mass, be 100 μ W/cm in irradiation intensity2, wavelength be 254nm ultraviolet lights under,
Stirring reaction 2h, adds 10% diatomite of liquid C mass, stirs, still aging 1h, suction filtration, obtain solid D and
Liquid D；The phosphoric acid for being 85% by the weight/mass percentage composition that the quality such as solid B are added in solid B, under the conditions of 550 DEG C, vacuum is forged
60min is burnt, room temperature is cooled to, is washed to weakly acidic pH, dries, pulverizes and sieves, the composite particles E that particle diameter is 0.2-2.5mm is obtained；
Solid C and solid D is mixed, drying, ball milling 8h, water spray wetting, granulation takes the bead that particle diameter is 2-25mm, drying, in 1000
DEG C calcining 20min, obtain porous small ball.Composite particles E and porous small ball are soaked in liquid D, adsorption saturation, dried；Press
The ratio of mass ratio, porous small ball and composite particles E and cement for construction in sea is 1:0.01:0.2 feeding, is well mixed, then by water and
Cement quality ratio is 0.19:1 ratio, adds water, stirs, and pours into the mould that size is 150mm*150mm*50mm, is molded,
Maintenance 28 days, obtains the artificial reef 2 with absorption harmful heavy metal ions and release nutrition salt functional.
Embodiment 3：The preparation of artificial reef 3
Take fresh excess sludge, adjust moisture content 80%, weigh 2Kg, add 200g diatomite, 10g nano barium titanate calcium and
400g weight/mass percentage compositions are 30% hydrogen peroxide, are stirred, and heat micro-boiling 20min, add 2L concentration respectively 1mol/L
With 0.35 mol/L nitric acid and the mixed acid solution of phosphoric acid, stir, be heated to 100 DEG C keep reaction 10min, suction filtration,
Obtain solid A and liquid A；Solid is added water in the solid A that step 1 is obtained just to submerge, is stirred, with 1mol/L hydrogen
Sodium hydroxide solution adjusts the pH value 11 of liquid, is heated to 100 DEG C, reacts 10min, adds sodium hydroxide solution, make the pH of mixed liquor
Value control stands 10h 11, and suction filtration obtains liquid B and solid B；Liquid A and liquid B mixing, stirring reaction completely, then use hydrogen
The pH value of calcium oxide adjustment solution is 7, stands 24h, suction filtration obtains solid C and liquid C；Liquid C mass is added in liquid C
1% nano barium titanate calcium, irradiation intensity be 100 μ W/cm2, wavelength be 254nm ultraviolet lights under, stirring reaction 3h, then
2% diatomite of liquid C mass is added, is stirred, still aging 1h, suction filtration obtains solid D and liquid D；By in solid B
The weight/mass percentage composition for adding the quality such as solid B is 85% phosphoric acid, and under the conditions of 350 DEG C, vacuum calcining 50min is cooled to room
Temperature, is washed to weakly acidic pH, drying, pulverizes and sieves, and obtains the composite particles E that particle diameter is 0.2-2.5mm；Solid C and solid D are mixed
Close, drying, ball milling 5h, water spray wetting, granulation, take the bead that particle diameter is 2-25mm, drying is calcined 40min in 950 DEG C, obtained
Porous small ball.Composite particles E and porous small ball are soaked in liquid D, adsorption saturation, dried；In mass ratio, porous small ball with
The ratio of composite particles E and cement for construction in sea is 1:0.1:0.3 feeding, is well mixed, then by water and cement quality ratio is 0.22:1
Ratio, adds water, stirs, and pours into the mould that size is 150mm*150mm*50mm, and shaping is conserved 28 days, had
Adsorb the artificial reef 3 of harmful heavy metal ions and release nutrition salt functional.
Embodiment 4：The preparation of artificial reef 4
Take fresh excess sludge, adjust moisture content 82%, weigh 2Kg, add 200g diatomite, 80g nano barium titanate calcium and
400g weight/mass percentage compositions are 30% hydrogen peroxide, are stirred, and heat micro-boiling 20min, add 2L concentration respectively 1mol/L
With 0.25 mol/L nitric acid and the mixed acid solution of phosphoric acid, stir, be heated to 85 DEG C and keep reaction 15min, suction filtration is obtained
To solid A and liquid A；Solid is added water in the solid A that step 1 is obtained just to submerge, is stirred, with 1mol/L hydrogen-oxygen
Change the pH value 11.6 that sodium solution adjusts liquid, be heated to 90 DEG C, react 10min, add sodium hydroxide solution, make the pH value of mixed liquor
Control stands 8h 11.6, and suction filtration obtains liquid B and solid B；Liquid A and liquid B mixing, stirring reaction completely, then use ammonia
The pH value of water and potassium hydroxide adjustment solution is 6, stands 15h, suction filtration obtains solid C and liquid C；Liquid is added in liquid C
The nano barium titanate calcium of the 0.1% of C mass, is 100 μ W/cm in irradiation intensity2, wavelength is under 254nm ultraviolet lights, stirring is anti-
3h is answered, 10% diatomite of liquid C mass is added, stirs, still aging 1h, suction filtration obtains solid D and liquid D；
The phosphoric acid for being 85% by the weight/mass percentage composition that the quality such as solid B are added in solid B, under the conditions of 550 DEG C, vacuum calcining
30min, is cooled to room temperature, is washed to weakly acidic pH, drying, pulverizes and sieves, and obtains the composite particles E that particle diameter is 0.2-2.5mm；Will
Solid C and solid D mixing, drying, ball milling 2h, water spray wetting, granulation takes the bead that particle diameter is 2-25mm, drying, in 1250 DEG C
20min is calcined, porous small ball is obtained.Composite particles E and porous small ball are soaked in liquid D, adsorption saturation, dried；By matter
Amount ratio, the ratio of porous small ball and composite particles E and cement for construction in sea is 1:0.02:0.2 feeding, is well mixed, then by water and water
Mud mass ratio is 0.19:1 ratio, adds water, stirs, and pours into the mould that size is 150mm*150mm*50mm, is molded, supports
Shield 28 days, obtains the artificial reef 4 with absorption harmful heavy metal ions and release nutrition salt functional.
Embodiment 5：The preparation of artificial reef 5
Take fresh excess sludge, adjust moisture content 85%, weigh 2Kg, add 400g diatomite, 10g nano barium titanate calcium and
200g weight/mass percentage compositions are 30% hydrogen peroxide, are stirred, and heat micro-boiling 10min, adding 2L concentration is respectively
The mixed acid solution of 0.5mol/L and 0.3 mol/L nitric acid and phosphoric acid, stirs, and is heated to 95 DEG C and keeps reaction 20min,
Suction filtration, obtains solid A and liquid A；Solid is added water in the solid A that step 1 is obtained just to submerge, and is stirred, is used 1mol/
L sodium hydroxide solution adjusts the pH value 12 of liquid, is heated to 80 DEG C, reacts 10min, adds sodium hydroxide solution, make mixed liquor
PH value control 12, stand 10h, suction filtration obtains liquid B and solid B；Liquid A and liquid B mixing, stirring reaction are complete, then
PH value with ammoniacal liquor and calcium hydroxide adjustment solution is 8, stands 12h, suction filtration obtains solid C and liquid C；Added in liquid C
0.1% nano barium titanate calcium of liquid C mass, is 100 μ W/cm in irradiation intensity2, wavelength be 254nm ultraviolet lights under, stir
Reaction 4h is mixed, 8% diatomite of liquid C mass is added, stirs, still aging 1h, suction filtration obtains solid D and liquid
D；The phosphoric acid for being 85% by the weight/mass percentage composition that the quality such as solid B are added in solid B, under the conditions of 450 DEG C, vacuum calcining
60min, is cooled to room temperature, is washed to weakly acidic pH, drying, pulverizes and sieves, and obtains the composite particles E that particle diameter is 0.2-2.5mm；Will
Solid C and solid D mixing, drying, ball milling 8h, water spray wetting, granulation takes the bead that particle diameter is 2-25mm, drying, in 1100 DEG C
32min is calcined, porous small ball is obtained.Composite particles E and porous small ball are soaked in liquid D, adsorption saturation, dried；By matter
Amount ratio, the ratio of porous small ball and composite particles E and cement for construction in sea is 1:0.1:0.3 feeding, is well mixed, then by water and cement
Mass ratio is 0.22:1 ratio, adds water, stirs, and pours into the mould that size is 150mm*150mm*50mm, is molded, maintenance
28 days, obtain the artificial reef 5 with absorption harmful heavy metal ions and release nutrition salt functional.
Embodiment 6：The preparation of artificial reef 6
Take fresh excess sludge, adjust moisture content 80%, weigh 2Kg, add 300g diatomite, 50g nano barium titanate calcium and
400g weight/mass percentage compositions are 30% hydrogen peroxide, are stirred, and heat micro-boiling 20min, add 2L concentration respectively 1mol/L
With 0.2mol/L nitric acid and the mixed acid solution of phosphoric acid, stir, be heated to 90 DEG C and keep reaction 15min, suction filtration is obtained
Solid A and liquid A；Solid is added water in the solid A that step 1 is obtained just to submerge, is stirred, with 1mol/L hydroxide
Sodium weak solution adjusts the pH value 12 of liquid, is heated to 90 DEG C, reacts 10min, adds dilute solution of sodium hydroxide, make the pH value of mixed liquor
Control stands 12h 12, and suction filtration obtains liquid B and solid B；Liquid A and liquid B mixing, stirring reaction completely, then use hydrogen-oxygen
The pH value for changing sodium and potassium hydroxide adjustment solution is 8, stands 17h, suction filtration obtains solid C and liquid C；Liquid is added in liquid C
0.5% nano barium titanate calcium of body C mass, is 100 μ W/cm in irradiation intensity2, wavelength be 254nm ultraviolet lights under, stirring
2h is reacted, 5% diatomite of liquid C mass is added, stirs, still aging 1h, suction filtration obtains solid D and liquid D；
The phosphoric acid for being 85% by the weight/mass percentage composition that the quality such as solid B are added in solid B, under the conditions of 450 DEG C, vacuum calcining
50min, is cooled to room temperature, is washed to weakly acidic pH, drying, pulverizes and sieves, and obtains the composite particles E that particle diameter is 0.2-2.5mm；Will
Solid C and solid D mixing, drying, ball milling 4h, water spray wetting, granulation takes the bead that particle diameter is 2-25mm, drying, in 1000 DEG C
30min is calcined, porous small ball is obtained.Composite particles E and porous small ball are soaked in liquid D, adsorption saturation, dried；By matter
Amount ratio, the ratio of porous small ball and composite particles E and cement for construction in sea is 1:0.05:0.25 feeding, is well mixed, then by water and water
Mud mass ratio is 0.21:1 ratio, adds water, stirs, and pours into the mould that size is 150mm*150mm*50mm, is molded, supports
Shield 28 days, obtains the artificial reef 6 with absorption harmful heavy metal ions and release nutrition salt functional.
Embodiment 7：Artificial reef main nutrient elements burst size
1 piece of artificial reef prepared by Example 1-6, is placed in 2L seawater, often soaks 1 day（24h）A water is changed, and is pressed
Nitrogen phosphorus contains in " DB33-699 organic liquid fertilizers and the requirement of organic and inorganic composite liquid fertilizer quality safety " analysis soak
Amount, the results are shown in Table 1
The nutrition burst size of the artificial reef of table 1（g/L）
Embodiment 8：The absorption property of artificial reef
The absorption property of artificial reef obtained by embodiment 1-6, takes 200 mg/L lead standard liquid 2000mL, in 3000 mL
In beaker, adjust the pH value of solution to 6, be separately added into the artificial reef obtained in 1 piece of embodiment 1-6, stir frequently, soak 24h,
The content of lead in supernatant is surveyed with Atomic absorption, by formula（1）Calculate clearance.It the results are shown in Table 2.
（1）
In formula：ηFor the clearance of lead（%）；C 0For initial concentration（mg/L）；C eFor equilibrium concentration（mg/L）.
The absorption property of the artificial reef prepared in the embodiment 1-6 of table 2
| Initial concentration,C 0（mg/L） | Lead concentration (Ce) after absorption（mg/L） | Adsorbance,（Mg/ blocks） | |
| Artificial reef 1 | 200 | 31.57 | 336.86 |
| Artificial reef 2 | 200 | 36.83 | 326.34 |
| Artificial reef 3 | 200 | 41.25 | 317.5 |
| Artificial reef 4 | 200 | 39.66 | 320.68 |
| Artificial reef 5 | 200 | 41.53 | 316.94 |
| Artificial reef 6 | 200 | 39.77 | 320.46 |
Claims (4)
1. a kind of method that utilization excess sludge prepares multifunction manual reef, it is characterised in that this method comprises the following steps：
1）Fresh excess sludge is taken, moisture content 80%-85% is adjusted, the 10%-20% of sludge quality diatomite, 0.5%- is added
5% nano barium titanate calcium and the hydrogen peroxide that 10%-20% weight/mass percentage composition is 30%, stir, are heated to micro-boiling 10-
20min, is 1Kg according still further to sludge quality and mixed acid volume ratio:1L ratios, add 0.5-1 mol/L nitric acid and 0.15-0.35
The mixed acid solution of mol/L phosphoric acid, stirs, be heated to 80-100 DEG C keep reaction 10-20min, separation of solid and liquid, consolidate
Body A and liquid A；
2）Solid is added water in the solid A that step 1 is obtained just to submerge, is stirred, with 1mol/L sodium hydroxide solution
The pH value 11-12 of liquid is adjusted, 80-100 DEG C is heated to, 10min is reacted, adds sodium hydroxide solution, make the pH value control of mixed liquor
System stands 6h-12h between 11-12, and separation of solid and liquid obtains liquid B and solid B；
3）Liquid B that the liquid A and step 2 that step 1 is obtained are obtained mixing, stirring reaction completely, then adjusts with alkali the pH of solution
It is worth for 6-8, stands 12-24h, separation of solid and liquid obtains solid C and liquid C；
4）It will add under the 0.1-1% of liquid C mass nano barium titanate calcium, ultraviolet light, stir in the liquid C obtained in step 3
Reaction 2-4h is mixed, the 2%-10% of liquid C mass diatomite is added, stirs, still aging 1h, separation of solid and liquid is obtained
Solid D and liquid D；
5）The weight/mass percentage composition that the quality such as solid B are added in the solid B that step 2 is obtained is 85% phosphoric acid, in 350-550
Under the conditions of DEG C, vacuum calcining 30-60min is cooled to room temperature, is washed to weakly acidic pH, drying, pulverizes and sieves, obtaining particle diameter is
0.2-2.5mm composite particles E;
6）The solid D mixing that the solid C and step 4 that step 3 is obtained are obtained, drying, ball milling 2-8h, water spray wetting, granulation takes grain
Footpath is 2-25mm bead, and drying calcines 20-40min in 950-1250 DEG C, obtains porous small ball;
7）The porous small ball that the composite particles E and step 6 that step 5 is obtained are obtained is soaked in the liquid D obtained in step 4
In, adsorption saturation, drying is 1 by the mass ratio of porous small ball, composite particles E and cement for construction in sea:0.01-0.1:0.2-0.3 ratios
Example feeding, is well mixed, then by water and cement quality ratio is 0.19-0.22:1, water is added, is stirred, is molded, maintenance 28
My god, obtain the artificial reef with absorption harmful heavy metal ions and release nutrition salt functional.
2. the method that a kind of utilization excess sludge according to claim 1 prepares multifunction manual reef, it is characterised in that
Described sludge is the excess sludge during biochemical process processing sanitary sewage.
3. the method that a kind of utilization excess sludge according to claim 1 prepares multifunction manual reef, it is characterised in that
The alkali of addition in described step 3 is the one or more in potassium hydroxide, calcium hydroxide, sodium hydroxide and ammoniacal liquor.
4. the method that a kind of utilization excess sludge according to claim 1 prepares multifunction manual reef, it is characterised in that
The a length of 254nm of ultraviolet light wave used during ultraviolet light irradiation in described step 4, irradiation intensity is to be not less than 100 μ W/cm2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710112023.5A CN106962249B (en) | 2017-02-28 | 2017-02-28 | Method for preparing multifunctional artificial reef by using excess sludge |
Applications Claiming Priority (1)
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