CN103708596B - In a kind of white wine wastewater conventional process, strengthening is removed and reclaims the method for nitrogen phosphorus - Google Patents
In a kind of white wine wastewater conventional process, strengthening is removed and reclaims the method for nitrogen phosphorus Download PDFInfo
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Abstract
The invention belongs to energy-saving and emission-reduction, waste reclaimation and resource treatment technique field, specifically disclose strengthening in a kind of white wine wastewater conventional process and remove and reclaim the method for nitrogen phosphorus.Its technological principle is after the anaerobic effluent of white wine wastewater conventional processes, before aerobic process, set gradually a reaction tank and a settling tank, add magnesium hydroxide or magnesium oxide by a certain percentage, generate magnesium ammonium phosphate sediment, realize removing and resource utilization recovery the strengthening of nitrogen phosphorus, reduce nitrogen, the phosphorus load into Aerobic Pond waste water.Present approach provides a kind of low cost, high-performance, high added value strengthening from white wine wastewater conventional process remove and reclaim the method for nitrogen, phosphorus, processing cost is low, treatment effect is reliable, easily promotes; It has wide market outlook, considerable economic benefit and social benefit.
Description
Technical field
The present invention relates to energy-saving and emission-reduction, waste reclaimation and resource treatment technique field, be specifically related to strengthening in a kind of white wine wastewater conventional process and remove and reclaim the method for nitrogen phosphorus.
Background technology
The white wine raw material of China is main mainly with wheat, corn, Chinese sorghum greatly.Production process mainly comprises the process of raw material, fermentation, distillation and packaging four steps, on average often produces 1t alcohol and produces waste water 8-15t.The waste water that still-process produces is the main source that spirit brewing factory pollutes, and its water quality general characteristic is high dissolved solids load (wherein 50% is reducing sugar), high ash content, high-temperature, the organism of low pH and high-content and inorganics.Distillery waste is difficult to process, brown polymkeric substance, melanoidin etc. owing to producing containing amino, carbonyl reaction in waste water.These compound with oxidation resistance performances are strong, and its toxicity can hinder the microorganism normal growth in typical waste water treatment process and cannot be biodegradable directly discharge and enter in environment.Except melanoidin compounds, the difficult degradation compound existed in waste water also has caramel, various products of sugar decomposition, anthocyanidin, tannic acid and different xenobiotic compounds.Waste water is also containing niff, and what cause these smells is then skatole, indoles and the sulfur compound that still-process is not completely broken down.It is very big that distillery waste directly drains into contaminative and hazardness in environment.
If the nutritive substance such as nitrogen, phosphorus enters the slow flow water bodies such as lake, river mouth, bay in a large number, algae and other planktonic organisms can be caused to breed rapidly, Dissolved Oxygen in Water amount declines, water quality deterioration, fish and other biological mortality.When eutrophication appears in water body, planktonic algae amount reproduction, forms wawter bloom (lake), red tide (ocean).Therefore, effectively must remove nitrogen and phosphorus pollutants.In regions such as China's Ring theory, Dianchi Lake, Yunnan Provinces, establish the nitrogen phosphorus emission standard stricter compared with national standard.
Traditional white wine wastewater processing technological flow is:
White wine wastewater → grid → coagulation → preliminary sedimentation tank → dosing reaction → air flotation pool 1 → anaerobism (UASB) → aerobic → second pond → dosing reaction → air flotation pool 2 → filtration → water outlet
Generally, white wine wastewater initial contamination substrate concentration is total nitrogen 150-220mg/L, total phosphorus 90-130mg/L.Because traditional white wine wastewater treatment process is lower to removal efficiency of nitrogen and phosphorus, therefore strengthening removal need be carried out to nitrogen phosphorus.
In the treating processes of urban domestic wastewater, general available A
2/ O technique synchronous denitrification dephosphorizing.But because white wine wastewater COD content is higher, generally reach 7000 ~ 10000mg/L, the anaerobic technique of wastewater treatment many employings UASB, if A traditionally
2/ O technique synchronous denitrification dephosphorizing, by second pond sludge reflux to anaerobic pond, and the granule sludge activity of havoc UASB is affected the removal to COD by this.
Therefore, how remove nitrogen, the phosphorus in white wine wastewater efficiently, and the technical study carrying out resource utilization recovery be domestic and international researcher, one of the focus studied of engineering technical personnel.
Summary of the invention
For the deficiencies in the prior art, strengthening in a kind of brand-new white wine wastewater conventional process has been the object of the present invention is to provide to remove and reclaim the method for nitrogen phosphorus.Its technological principle sets gradually a reaction tank and a settling tank after the anaerobic pond water outlet of white wine wastewater conventional processes equipment, before Aerobic Pond water inlet, add magnesium oxide or magnesium hydroxide by a certain percentage, generate magnesium ammonium phosphate sediment, realize removing the strengthening of nitrogen phosphorus, reduce the nitrogen and phosphorus load of the waste water into Aerobic Pond, and achieve resource utilization recovery is carried out to nitrogen phosphorus.
There is years of researches working foundation in the team of present inventor in this area, on this, then gropes in conjunction with the test of a large amount of novelty, finally obtains following technical scheme:
In white wine wastewater conventional process, strengthening is removed and reclaims a method for nitrogen phosphorus, and its step is as follows:
(1) after the anaerobic pond water outlet of white wine wastewater conventional processes equipment, before Aerobic Pond water inlet, a reaction tank and a settling tank is set gradually, and after the filtrate after biological sludge mechanical dehydration in white wine wastewater conventional process is back to anaerobic pond water outlet in newly-installed reaction tank, mix with anaerobic pond water outlet;
Arrange stirrer in described reaction tank, described settling tank surface load is 0.8 ~ 1.0m
3/ m
2h.
(2) in reaction tank, stirrer mixing speed is set to 60 ~ 90rpm, in reaction tank, add following medicament successively: magnesium oxide (or magnesium hydroxide), sodium hydroxide and cationic-type polyacrylamide;
Wherein, the dosage of magnesium oxide or magnesium hydroxide measures with magnesium elements, and the input magnesium elements of reaction tank and the mol ratio of reaction tank Phosphorus From Wastewater element are (1.1-1.3): 1;
The dosage of sodium hydroxide is 30-50mg/L;
The dosage of cationic-type polyacrylamide is 5-8mg/L;
After having offerd medicine, reaction 15-20min;
Reaction tank water outlet enters settling tank, and settling tank water outlet enters Aerobic Pond;
(3) dewatered by clarifier sludge, obtain magnesium ammonium phosphate (struvite), nitrogen, phosphorus are able to resource utilization and reclaim.
Experimental result is as follows:
Adopt above strengthening remove and reclaim the method for nitrogen, phosphorus, the nitrogen, the phosphorus load that enter the waste water (i.e. settling tank water outlet) of Aerobic Pond have dropped 50 ~ 70% respectively, and 90 ~ 95%(is white wine wastewater conventional processes comparatively).
The purity of step (3) gained magnesium ammonium phosphate is 85 ~ 95%(butt, mass percentage).
Compared with prior art, of the present invention from white wine wastewater conventional process strengthening remove and reclaim nitrogen, the method tool of phosphorus has the following advantages:
(1) adopt present method synchronous denitrification dephosphorizing, make nitrogen, phosphorus efficiently removed, and carry out resource utilization recovery; In addition, traditional A
2/ O technique synchronous denitrogen dephosphorus technology, by second pond sludge reflux to anaerobic pond, according to A
2/ O technique processes white wine wastewater, and this is by the granule sludge activity of havoc UASB, affects the removal to COD, and present method strengthening is removed and reclaims nitrogen, phosphorus, can overcome the traditional A of application
2the shortcoming of/O Process Treating Liquor Wastewater, ensure that anaerobic process are to organic efficient removal.Provided by the present invention from white wine wastewater conventional process strengthening remove and reclaim the method for nitrogen, phosphorus, processing cost is low, treatment effect is reliable, easily promotes.This technology can provide the strengthening from white wine wastewater conventional process of a kind of low cost, high-performance, high added value remove and reclaim the method for nitrogen, phosphorus, and it has wide market outlook, considerable economic benefit and social benefit.
(2) present method intensified denitrification and dephosphorization chemical agent used is powder MgO or Mg (OH)
2, different and usual selected MgCl
2or Mg (NO
3)
2, its advantageous is in three: one is adopt powder MgO or Mg (OH)
2, can in and anaerobic pond go out acidity of water, improve pH value, for intensified denitrification and dephosphorization creates condition; Two is raisings of anaerobic pond water outlet pH value, for follow-up aerobic biochemical process provides favourable condition; Three is adopt powder MgO or Mg (OH)
2, the salinity of waste water can be reduced, be also conducive to aerobic microbiological process.
(3) present method is by (before Aerobic Pond water inlet) newly-installed reaction tank after the filtrate of biological sludge mechanical dehydration is back to anaerobic pond water outlet in white wine wastewater conventional process, the phosphorus in sludge dewatering filtrate is made effectively to be removed and reclaim, also compensate for the problem of N∶P ratio in newly-installed reaction tank simultaneously, further increase the clearance of nitrogen in waste water.
(4) this technique and flow process compact, easy to operate, be easy to realize industrial applications.Device selected by the present invention can realize equipment, reduce and take up an area and save energy consumption, and capital cost is reduced greatly; Meanwhile, easily be automated control to the nitrogen phosphorus recycling of white wine wastewater, human users is easy, has good industrial applications prospect.
Embodiment
Be below specific embodiments of the invention, technical scheme of the present invention is described further, but protection scope of the present invention is not limited to these embodiments.Every do not deviate from the present invention's design change or equivalent substituting all should be included within protection scope of the present invention.
Embodiment 1:
Handling object: the comprehensive wastewater 1 that certain spirit brewing factory discharges.
This spirit brewing factory take red sorghum as raw material, and day produces waste water 800m
3, waste water COD
crfor 8200mg/L, total nitrogen is 218mg/L, and total phosphorus is 125mg/L, and current waste water processing station adopts following conventional processes:
White wine wastewater → grid → coagulation → preliminary sedimentation tank → dosing reaction → air flotation pool 1 → anaerobism (UASB) → aerobic → second pond → dosing reaction → air flotation pool 2 → filtration → water outlet
Waste water after physico-chemical pretreatment, anaerobic treatment, anaerobic pond water outlet COD
crfor 790mg/L, total nitrogen 212mg/L, total phosphorus is 103mg/L, and pH value is 3.9, and the nitrogen and phosphorus load entering Aerobic Pond is still higher, and the difficulty of subsequent technique and device process nitrogen phosphorus is larger.
Implementation process:
Apply of the present invention in white wine wastewater conventional process strengthening remove and reclaim the method for nitrogen phosphorus, a reaction tank and a settling tank is set gradually after the anaerobic pond water outlet of white wine wastewater conventional processes equipment, before Aerobic Pond water inlet, and after the filtrate after biological sludge mechanical dehydration in white wine wastewater conventional process is back to anaerobic pond water outlet in newly-installed reaction tank, mix with anaerobic pond water outlet.
In described reaction tank, the rotating speed of stirrer is set to 85rpm, and settling tank surface load is 0.8m
3/ m
2h.
Following medicament is added successively: powder MgO, NaOH and cationic-type polyacrylamide in reaction tank, MgO dosage is Mg:P=1.3:1 by the mol ratio of P element in magnesium elements and reaction tank waste water, NaOH dosage is 50mg/L, and cationic-type polyacrylamide dosage is 8mg/L;
After having offerd medicine, reaction 20min.
Reaction tank water outlet enters settling tank, and settling tank water outlet enters Aerobic Pond;
Dewatered by clarifier sludge, obtain magnesium ammonium phosphate (struvite), nitrogen, phosphorus are able to resource utilization and reclaim.
Result of implementation is as follows:
Adopt above strengthening remove and reclaim the method for nitrogen, phosphorus, the nitrogen, the phosphorus load that enter the waste water of Aerobic Pond have dropped 55%, 92% respectively, pH value is 8.4, the purity of clarifier sludge dehydration gained magnesium ammonium phosphate is 88%(butt, mass percentage), nitrogen, phosphorus are able to resource utilization and reclaim.
Embodiment 2:
Handling object: the comprehensive wastewater 1 that certain spirit brewing factory discharges.
This spirit brewing factory take red sorghum as raw material, and day produces waste water 800m
3, waste water COD
crfor 8200mg/L, total nitrogen is 218mg/L, and total phosphorus is 125mg/L, and current waste water processing station adopts following conventional processes:
White wine wastewater → grid → coagulation → preliminary sedimentation tank → dosing reaction → air flotation pool 1 → anaerobism (UASB) → aerobic → second pond → dosing reaction → air flotation pool 2 → filtration → water outlet
Waste water after physico-chemical pretreatment, anaerobic treatment, anaerobic pond water outlet COD
crfor 790mg/L, total nitrogen 212mg/L, total phosphorus is 103mg/L, and pH value is 3.9, and the nitrogen and phosphorus load entering Aerobic Pond is still higher, and the difficulty of subsequent technique and device process nitrogen phosphorus is larger.
Implementation process:
Apply of the present invention in white wine wastewater conventional process strengthening remove and reclaim the method for nitrogen phosphorus, a reaction tank and a settling tank is set gradually after the anaerobic pond water outlet of white wine wastewater conventional processes equipment, before Aerobic Pond water inlet, and after the filtrate after biological sludge mechanical dehydration in white wine wastewater conventional process is back to anaerobic pond water outlet in newly-installed reaction tank, mix with anaerobic pond water outlet.
In described reaction tank, the rotating speed of stirrer is set to 85rpm, and settling tank surface load is 0.8m
3/ m
2h.
Following medicament is added successively: powder Mg(OH) in reaction tank
2, NaOH and cationic-type polyacrylamide, Mg(OH)
2dosage is 50mg/L by magnesium elements and reaction tank waste water, the mol ratio of P element is Mg:P=1.3:1, NaOH dosage, and cationic-type polyacrylamide dosage is 8mg/L;
After having offerd medicine, reaction 20min.
Reaction tank water outlet enters settling tank, and settling tank water outlet enters Aerobic Pond;
Dewatered by clarifier sludge, obtain magnesium ammonium phosphate (struvite), nitrogen, phosphorus are able to resource utilization and reclaim.
Result of implementation is as follows:
Adopt above strengthening remove and reclaim the method for nitrogen, phosphorus, the nitrogen, the phosphorus load that enter the waste water of Aerobic Pond have dropped 57%, 93% respectively, pH value is 8.3, the purity of clarifier sludge dehydration gained magnesium ammonium phosphate is 89%(butt, mass percentage), nitrogen, phosphorus are able to resource utilization and reclaim.
Embodiment 3:
Handling object: the comprehensive wastewater 2 that certain spirit brewing factory discharges.
This spirit brewing factory take red sorghum as raw material, and day produces waste water 700m
3, waste water COD
crfor 7800mg/L, total nitrogen 155mg/L, total phosphorus concentration is 93mg/L, and current waste water processing station adopts following conventional processes:
White wine wastewater → grid → coagulation → preliminary sedimentation tank → dosing reaction → air flotation pool 1 → anaerobism (UASB) → aerobic → second pond → dosing reaction → air flotation pool 2 → filtration → water outlet
Waste water after physico-chemical pretreatment, anaerobic treatment, anaerobic pond water outlet COD
crfor 782mg/L, total nitrogen 150mg/L, total phosphorus concentration is 81mg/L, and pH value is 4.2, and the nitrogen and phosphorus load entering Aerobic Pond is still higher, and the difficulty of subsequent technique and device process nitrogen phosphorus is larger.
Implementation process:
Apply of the present invention in white wine wastewater conventional process strengthening remove and reclaim the method for nitrogen phosphorus, a reaction tank and a settling tank is set gradually after the anaerobic pond water outlet of white wine wastewater conventional processes equipment, before Aerobic Pond water inlet, and after the filtrate after biological sludge mechanical dehydration in white wine wastewater conventional process is back to anaerobic pond water outlet in newly-installed reaction tank, mix with anaerobic pond water outlet.
In described reaction tank, the rotating speed of stirrer is set to 65rpm, and settling tank surface load is 0.9m
3/ m
2h.
Following medicament is added successively: powder Mg (OH) in reaction tank
2, NaOH and cationic-type polyacrylamide, Mg (OH)
2dosage is 30mg/L by magnesium elements and reaction tank waste water, the mol ratio of P element is Mg:P=1.1:1, NaOH dosage, and cationic-type polyacrylamide dosage is 5mg/L;
After having offerd medicine, reaction 15min.
Reaction tank water outlet enters settling tank, and settling tank water outlet enters Aerobic Pond;
Dewatered by clarifier sludge, obtain magnesium ammonium phosphate (struvite), nitrogen, phosphorus are able to resource utilization and reclaim.
Result of implementation is as follows:
Above strengthening is adopted to remove and reclaim the method for nitrogen, phosphorus, enter the nitrogen of the waste water of Aerobic Pond, phosphorus load and have dropped 68%, 94% respectively, pH value is 7.8, and the purity of clarifier sludge dehydration gained magnesium ammonium phosphate is 92%(butt, mass percentage), nitrogen, phosphorus are able to resource utilization and reclaim.
Embodiment 4:
Handling object: the comprehensive wastewater 2 that certain spirit brewing factory discharges.
This spirit brewing factory take red sorghum as raw material, and day produces waste water 700m
3, waste water COD
crfor 7800mg/L, total nitrogen 155mg/L, total phosphorus concentration is 93mg/L, and current waste water processing station adopts following conventional processes:
White wine wastewater → grid → coagulation → preliminary sedimentation tank → dosing reaction → air flotation pool 1 → anaerobism (UASB) → aerobic → second pond → dosing reaction → air flotation pool 2 → filtration → water outlet
Waste water after physico-chemical pretreatment, anaerobic treatment, anaerobic pond water outlet COD
crfor 782mg/L, total nitrogen 150mg/L, total phosphorus concentration is 81mg/L, and pH value is 4.2, and the nitrogen and phosphorus load entering Aerobic Pond is still higher, and the difficulty of subsequent technique and device process nitrogen phosphorus is larger.
Implementation process:
Apply of the present invention in white wine wastewater conventional process strengthening remove and reclaim the method for nitrogen phosphorus, a reaction tank and a settling tank is set gradually after the anaerobic pond water outlet of white wine wastewater conventional processes equipment, before Aerobic Pond water inlet, and after the filtrate after biological sludge mechanical dehydration in white wine wastewater conventional process is back to anaerobic pond water outlet in newly-installed reaction tank, mix with anaerobic pond water outlet.
In described reaction tank, the rotating speed of stirrer is set to 65rpm, and settling tank surface load is 0.9m
3/ m
2h.
Following medicament is added successively: powder MgO, NaOH and cationic-type polyacrylamide in reaction tank, MgO dosage is Mg:P=1.1:1 by the mol ratio of P element in magnesium elements and reaction tank waste water, NaOH dosage is 30mg/L, and cationic-type polyacrylamide dosage is 5mg/L;
After having offerd medicine, reaction 15min.
Reaction tank water outlet enters settling tank, and settling tank water outlet enters Aerobic Pond;
Dewatered by clarifier sludge, obtain magnesium ammonium phosphate (struvite), nitrogen, phosphorus are able to resource utilization and reclaim.
Result of implementation is as follows:
Above strengthening is adopted to remove and reclaim the method for nitrogen, phosphorus, enter the nitrogen of the waste water of Aerobic Pond, phosphorus load and have dropped 67%, 93% respectively, pH value is 7.7, and the purity of clarifier sludge dehydration gained magnesium ammonium phosphate is 93%(butt, mass percentage), nitrogen, phosphorus are able to resource utilization and reclaim.
Embodiment 5:
Handling object: certain spirit brewing comprehensive wastewater that factory discharges 3.
This spirit brewing factory take red sorghum as raw material, and day produces waste water 850m
3, waste water COD
crfor 8600mg/L, total nitrogen 196mg/L, total phosphorus concentration is 110mg/L, and current waste water processing station adopts following conventional processes:
White wine wastewater → grid → coagulation → preliminary sedimentation tank → dosing reaction → air flotation pool 1 → anaerobism (UASB) → aerobic → second pond → dosing reaction → air flotation pool 2 → filtration → water outlet
Waste water after physico-chemical pretreatment, anaerobic treatment, anaerobic pond water outlet COD
crfor 810mg/L, total nitrogen 190mg/L, total phosphorus is 95mg/L, and pH value is 4.8, and the nitrogen and phosphorus load entering Aerobic Pond is still higher, and the difficulty of subsequent technique and device process nitrogen phosphorus is larger.
Implementation process:
Apply of the present invention in white wine wastewater conventional process strengthening remove and reclaim the method for nitrogen phosphorus, a reaction tank and a settling tank is set gradually after the anaerobic pond water outlet of white wine wastewater conventional processes equipment, before Aerobic Pond water inlet, and after the filtrate after biological sludge mechanical dehydration in white wine wastewater conventional process is back to anaerobic pond water outlet in newly-installed reaction tank, mix with anaerobic pond water outlet.
In described reaction tank, the rotating speed of stirrer is set to 75rpm, and settling tank surface load is 0.92m
3/ m
2h.
Following medicament is added successively: powder MgO, NaOH and cationic-type polyacrylamide in reaction tank, MgO dosage is Mg:P=1.2:1 by the mol ratio of P element in magnesium elements and reaction tank waste water, NaOH dosage is 40mg/L, and cationic-type polyacrylamide dosage is 7mg/L;
After having offerd medicine, reaction 18min.
Reaction tank water outlet enters settling tank, and settling tank water outlet enters Aerobic Pond;
Dewatered by clarifier sludge, obtain magnesium ammonium phosphate (struvite), nitrogen, phosphorus are able to resource utilization and reclaim.
Result of implementation is as follows:
Above strengthening is adopted to remove and reclaim the method for nitrogen, phosphorus, enter the nitrogen of the waste water of Aerobic Pond, phosphorus load and have dropped 60%, 91% respectively, pH value is 8.0, and the purity of clarifier sludge dehydration gained magnesium ammonium phosphate is 90%(butt, mass percentage), nitrogen, phosphorus are able to resource utilization and reclaim.
Embodiment 6:
Handling object: certain spirit brewing comprehensive wastewater that factory discharges 3.
This spirit brewing factory take red sorghum as raw material, and day produces waste water 850m
3, waste water COD
crfor 8600mg/L, total nitrogen 196mg/L, total phosphorus concentration is 110mg/L, and current waste water processing station adopts following conventional processes:
White wine wastewater → grid → coagulation → preliminary sedimentation tank → dosing reaction → air flotation pool 1 → anaerobism (UASB) → aerobic → second pond → dosing reaction → air flotation pool 2 → filtration → water outlet
Waste water after physico-chemical pretreatment, anaerobic treatment, anaerobic pond water outlet COD
crfor 810mg/L, total nitrogen 190mg/L, total phosphorus is 95mg/L, and pH value is 4.8, and the nitrogen and phosphorus load entering Aerobic Pond is still higher, and the difficulty of subsequent technique and device process nitrogen phosphorus is larger.
Implementation process:
Apply of the present invention in white wine wastewater conventional process strengthening remove and reclaim the method for nitrogen phosphorus, a reaction tank and a settling tank is set gradually after the anaerobic pond water outlet of white wine wastewater conventional processes equipment, before Aerobic Pond water inlet, and after the filtrate after biological sludge mechanical dehydration in white wine wastewater conventional process is back to anaerobic pond water outlet in newly-installed reaction tank, mix with anaerobic pond water outlet.
In described reaction tank, the rotating speed of stirrer is set to 75rpm, and settling tank surface load is 0.92m
3/ m
2h.
Following medicament is added successively: powder Mg (OH) in reaction tank
2, NaOH and cationic-type polyacrylamide, Mg (OH)
2dosage is 40mg/L by magnesium elements and reaction tank waste water, the mol ratio of P element is Mg:P=1.2:1, NaOH dosage, and cationic-type polyacrylamide dosage is 7mg/L;
After having offerd medicine, reaction 18min.
Reaction tank water outlet enters settling tank, and settling tank water outlet enters Aerobic Pond;
Dewatered by clarifier sludge, obtain magnesium ammonium phosphate (struvite), nitrogen, phosphorus are able to resource utilization and reclaim.
Result of implementation is as follows:
Above strengthening is adopted to remove and reclaim the method for nitrogen, phosphorus, enter the nitrogen of the waste water of Aerobic Pond, phosphorus load and have dropped 61%, 92% respectively, pH value is 8.1, and the purity of clarifier sludge dehydration gained magnesium ammonium phosphate is 89%(butt, mass percentage), nitrogen, phosphorus are able to resource utilization and reclaim.
Claims (1)
1. in white wine wastewater conventional process, strengthening is removed and reclaims a method for nitrogen phosphorus, and its step is as follows:
(1) after the anaerobic pond water outlet of white wine wastewater Processing Equipment, before Aerobic Pond water inlet, a reaction tank and a settling tank is set gradually, and after the filtrate after biological sludge mechanical dehydration in white wine wastewater treating processes is back to anaerobic pond water outlet in newly-installed reaction tank, mix with anaerobic pond water outlet;
Arrange stirrer in described reaction tank, described settling tank surface load is 0.8 ~ 1.0m
3/ m
2h;
(2) in reaction tank, following medicament is added successively: magnesium oxide, sodium hydroxide and cationic-type polyacrylamide;
Or add following medicament: magnesium hydroxide, sodium hydroxide and cationic-type polyacrylamide;
Wherein, the dosage of magnesium oxide or magnesium hydroxide measures with magnesium elements, and the input magnesium elements of reaction tank and the mol ratio of reaction tank Phosphorus From Wastewater element are 1.1-1.3:1;
The dosage of sodium hydroxide is 30-50mg/L;
The dosage of cationic-type polyacrylamide is 5-8mg/L;
After having offerd medicine, reaction 15-20min;
Reaction tank water outlet enters settling tank, and settling tank water outlet enters Aerobic Pond;
(3) clarifier sludge is dewatered, obtain magnesium ammonium phosphate.
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| CN104556471A (en) * | 2014-12-04 | 2015-04-29 | 常州大学 | Method for restoring phosphatic substances in slow-release water body |
| CN107619153B (en) * | 2017-09-25 | 2020-09-22 | 罗定市丰智酒业有限公司 | Construction method of liquor production wastewater biodegradation system |
| CN108751572A (en) * | 2018-05-17 | 2018-11-06 | 沈阳建筑大学 | A kind of wastewater treatment equipment and method of intensified denitrification and dephosphorization |
| CN110498578A (en) * | 2019-09-25 | 2019-11-26 | 厦门海洋职业技术学院 | A kind of recovery method of fats and oils processing high phosphorus Phosphorus From Wastewater |
| CN113860703A (en) * | 2021-09-17 | 2021-12-31 | 华南理工大学 | Method for reducing and recycling excess sludge through persulfate pretreatment by thermal activation |
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| CN101962244A (en) * | 2009-06-12 | 2011-02-02 | 中国环境科学研究院 | Livestock breeding wastewater nutrient pollution control and recycling process |
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