CN104030488A - Wastewater phosphorus recovery pretreatment process - Google Patents
Wastewater phosphorus recovery pretreatment process Download PDFInfo
- Publication number
- CN104030488A CN104030488A CN201410257983.7A CN201410257983A CN104030488A CN 104030488 A CN104030488 A CN 104030488A CN 201410257983 A CN201410257983 A CN 201410257983A CN 104030488 A CN104030488 A CN 104030488A
- Authority
- CN
- China
- Prior art keywords
- waste water
- phosphorus
- stripping
- settling tank
- reclaims
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Removal Of Specific Substances (AREA)
Abstract
The invention discloses a wastewater phosphorus recovery pretreatment process, belonging to the field of water pollution control and resource recycling. The wastewater phosphorus recovery pretreatment process comprises the following steps: performing CO2 air stripping of the phosphorus-containing wastewater in an air stripping tank (tower); leading the wastewater after air stripping into a sedimentation tank in an automatic-flow mode; removing the suspension organic matters, colloids and some sediments of the wastewater in the sedimentation tank; performing phosphorus recovery of the effluent of the sedimentation tank through magnesium ammonium phosphate or calcium phosphate crystallization reaction. By adopting the wastewater phosphorus recovery pretreatment process disclosed by the invention, the alkali added for phosphorus recovery can be greatly reduced, the content of impurities in the phosphorus recovery product is reduced, and meanwhile, the problem of scaling of facilities such as water pumps, pipe fittings and the like is effectively solved.
Description
Technical field
The invention belongs to water pollution control and resource recovery field, is that phosphorus-containing wastewater carries out a kind of pre-treating technology of phosphorus while reclaiming.
Background technology
A large amount of existence of Phosphorus From Wastewater are the one of the main reasons of body eutrophication, and quality of water environment is caused to serious negative impact, have become one of current great environmental problem.Phosphorus is the indispensable nutritive elements of all life forms, is also important industrial chemicals, the finiteness of occurring in nature phosphorus ore resource particularly, and the recycle that makes to realize phosphor resource is very necessary.It is the important way of alleviating water pollution and phosphor resource shortage that the phosphorus of waste water reclaims.At present, the main technique reclaiming from phosphorus in waste water such as breeding wastewater, municipal sludge anaerobic supernatants is magnesium ammonium phosphate (MgNH
4pO
46H
2o) and calcium phosphate (Ca
5(PO
4)
3(OH), Ca
3(PO
4)
2xH
2o etc.) crystalline deposit technique, the magnesium ammonium phosphate of recovery and calcium phosphate are good slow release fertilizers, can directly apply to agriculture production.
The suspension that contains high density in the rich phosphorus waste water such as livestock breeding wastewater, municipal sludge anaerobic supernatant and the organism of colloidality, and the carbonate of 100-800 mg/L, when phosphorus reclaims, need add a large amount of alkali (as NaOH) and abolish carbonate buffer system, pH value is brought up to 8.0-10.0, cause working cost larger; And if alkali dosage controls badly, the inorganic salt of generation precipitation easily causes the scale problems of the facilities such as water pump, pipe fitting, affects phosphorus organic efficiency and service life of equipment.In addition, because the organic content of suspension in waste water and colloidality is high, when phosphorus reclaims, easily mix with magnesium ammonium phosphate and calcium phosphate crystal, be difficult to separation, cause in product foreign matter content higher, phosphate content is lower.Given this, pre-treating process when research and development phosphorus in waste water reclaims, reduces carbonate and organic content in waste water, reduces equipment scaling, and the popularization of reclaiming for phosphorus in waste water has important using value.
Summary of the invention
While reclaiming for phosphorus in waste water such as livestock breeding wastewater, municipal sludge anaerobic supernatants, need add a large amount of alkali, product foreign matter content is high, and the problem of the easy foulings of facility such as water pump, tube fittings the invention provides a kind of phosphorus in waste water and reclaims pre-treating technology.Described technical scheme comprises the following steps:
(1) first in stripping pond, adopt aeration stripping or spray stripping method by the carbonate in waste water with CO
2form remove, control gas-water ratio (1-100): 1 and stripping tank waterpower residence time 5-120 min, the pH value of waste water is increased to 7.0-9.0;
(2) waste water after stripping is with from the streamed settling tank that enters;
(3) control the hydraulic detention time 10-120min in settling tank, in settling tank, carry out the removal of suspension and colloidal organic matter and part inorganic salt precipitates;
(4) settling tank water outlet is carried out phosphorus recovery by magnesium ammonium phosphate, potassium magnesium phosphate or calcium phosphate crystal precipitin reaction again.
Phosphorus in waste water provided by the present invention reclaims the technique of pre-treatment, can greatly reduce the alkali number adding when phosphorus reclaims, and reduces the content that reclaims impurity in product, effectively solves the problem of the facility foulings such as water pump, tube fittings simultaneously.It is inorganic carbon or carbonate concentration 50-2000 mg/L, pH value 5.0-8.0, phosphoric acid salt (in P) 20-500 mg/L, suspended solids 50-2000 mg/L that treatment process provided by the invention can be processed waste water quality.
Embodiment
embodiment 1:
Certain livestock breeding wastewater, initial pH value 6.0, suspended solids 830 mg/L, carbonate 800 mg/L, NH
4 +and PO
4 3-concentration is respectively 340 mg/L and 93 mg/L.First waste water is pumped in stripping pond and carry out aeration stripping, control vapour-liquid ratio 8:1, the residence time 100 min, after stripping, pH value rises to 9.0, carbonate removal 95%.By the waste water after stripping, from flowing into settling tank, sedimentation time 60 min, remove more than 90% suspended solids and colloid in waste water, and part inorganic salt precipitated product.Water outlet after settling tank is pumped into crystallization reaction pond, adds a certain amount of MgCl
2, the NaOH that adds 0.2 mg/L adjusts pH value to 9.4, carries out magnesium ammonium phosphate (MgNH
4pO
46H
2o) crystallization reaction.After reaction finishes, the magnesium ammonium phosphate content 99.5% in the throw out reclaiming after testing.
embodiment 2:
Certain municipal sludge anaerobic supernatant, initial pH value 7.0, suspended solids 1200 mg/L, carbonate 500 mg/L, NH
4 +and PO
4 3-concentration is respectively 820 mg/L and 150mg/L.First waste water is pumped in stripping pond and carry out aeration stripping, control vapour-liquid ratio 6:1, the residence time 70 min, after stripping, pH value rises to 8.7, carbonate removal 97%.By the waste water after stripping, from flowing into settling tank, sedimentation time 120 min, remove more than 89% suspended solids and colloid in waste water, and partly precipitated reaction product.Water outlet after settling tank is pumped into crystallization reaction pond, adds a certain amount of MgCl
2, the NaOH that adds 0.5 mg/L adjusts pH value to 9.5, carries out magnesium ammonium phosphate (MgNH
4pO
46H
2o) crystallization reaction.After reaction finishes, the magnesium ammonium phosphate content 99.4% in the throw out reclaiming after testing.
Claims (7)
1. phosphorus in waste water reclaims a pre-treating technology, it is characterized in that it comprises following operation: first phosphorus-containing wastewater carries out CO in stripping pond (tower)
2stripping; Waste water after stripping is with from the streamed settling tank that enters; Then waste water carries out the separated removal of suspended organic matter, colloid and partly precipitated product in settling tank; Phosphorus recovery is carried out in settling tank water outlet again.
2. phosphorus in waste water according to claim 1 reclaims pre-treating technology, it is characterized in that the described interior waste water CO in stripping pond (tower)
2stripping form comprise aeration stripping and spray stripping.
3. phosphorus in waste water according to claim 1 and 2 reclaims pre-treating technology, it is characterized in that the described interior gas-water ratio in stripping pond (tower) (1-100): 1, and residence time 5-120 min.
4. phosphorus in waste water according to claim 1 and 2 reclaims pre-treating technology, it is characterized in that the waste water ph after stripping is 7.0-9.0.
5. phosphorus in waste water according to claim 1 reclaims pre-treating technology, it is characterized in that described comprising from streamed: stripping pond and settling tank are built jointly, waste water in without impressed pressure situation in the mode of overflow or undercurrent by stripping pond inflow settling tank; Or waste water flows into settling tank by pipeline or irrigation canals and ditches by stripping pond in without impressed pressure situation.
6. phosphorus in waste water according to claim 1 reclaims pre-treating technology, it is characterized in that retention time of sewage 10-120 min in described settling tank.
7. phosphorus in waste water according to claim 1 reclaims pre-treating technology, it is characterized in that described phosphorus recovery comprises that magnesium ammonium phosphate, potassium magnesium phosphate and calcium phosphate reclaim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410257983.7A CN104030488B (en) | 2014-06-12 | 2014-06-12 | Phosphorus in waste water reclaims pre-treating technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410257983.7A CN104030488B (en) | 2014-06-12 | 2014-06-12 | Phosphorus in waste water reclaims pre-treating technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104030488A true CN104030488A (en) | 2014-09-10 |
| CN104030488B CN104030488B (en) | 2016-04-06 |
Family
ID=51461519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410257983.7A Active CN104030488B (en) | 2014-06-12 | 2014-06-12 | Phosphorus in waste water reclaims pre-treating technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104030488B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105084943A (en) * | 2015-08-10 | 2015-11-25 | 中国科学院城市环境研究所 | Low-cost waste water phosphorus fertilizer production technology |
| CN109081473A (en) * | 2018-09-18 | 2018-12-25 | 重庆市六九畜牧科技股份有限公司 | Anaerobic fermentation liquid treating system and processing method |
| CN113145632A (en) * | 2021-04-07 | 2021-07-23 | 清华大学深圳国际研究生院 | Preparation method of soil remediation agent based on phosphorus recovery product and soil remediation method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103373793A (en) * | 2012-04-27 | 2013-10-30 | 中国科学院城市环境研究所 | High-efficiency and low-consumption livestock and poultry breeding wastewater treatment and recycling technology |
-
2014
- 2014-06-12 CN CN201410257983.7A patent/CN104030488B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105084943A (en) * | 2015-08-10 | 2015-11-25 | 中国科学院城市环境研究所 | Low-cost waste water phosphorus fertilizer production technology |
| CN109081473A (en) * | 2018-09-18 | 2018-12-25 | 重庆市六九畜牧科技股份有限公司 | Anaerobic fermentation liquid treating system and processing method |
| CN113145632A (en) * | 2021-04-07 | 2021-07-23 | 清华大学深圳国际研究生院 | Preparation method of soil remediation agent based on phosphorus recovery product and soil remediation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104030488B (en) | 2016-04-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106698745B (en) | Method for recovering phosphorus in sewage | |
| CN102863097A (en) | Standardized treatment reinjection method of sulfur-containing waste liquid of high sulfur-containing oil and gas field | |
| CN101948215A (en) | Garbage leachate treatment process | |
| US20120261334A1 (en) | Methods and apparatus for struvite recovery using upstream co2 injection | |
| CN102674593A (en) | Method for treating waste water generated in ionic rare earth production | |
| CN104291482B (en) | A kind for the treatment of process containing high density phosphite waste water | |
| KR101360017B1 (en) | Method of water treatment and system using the same | |
| CN104909502A (en) | Biogas slurry pretreatment method | |
| CN104030488B (en) | Phosphorus in waste water reclaims pre-treating technology | |
| CN104787983A (en) | Treatment process for synthetic fiberboard production wastewater | |
| CN104291498A (en) | Processing method and corresponding processing system for chemical nickel plating waste liquid containing nitric acids | |
| CN103951112A (en) | Method for removing heavy metals in wastewater phosphorus recovery product | |
| CN203768178U (en) | Circuit board production ink wastewater treatment system | |
| CN203922903U (en) | A kind of mine tailing wastewater treatment system | |
| CN207877529U (en) | Organosilicon effluent disposal system | |
| CN103951139A (en) | Oilfield wastewater treatment process | |
| CN103011360A (en) | Treatment method for industrial wastewater generated by copper wet-process smelting | |
| US20140147910A1 (en) | Methods and systems for recovering phosphorus from wastewater with enhanced removal of phosphorus from biosolids | |
| CN104803560A (en) | Method for manufacturing precipitated lignin from production waste water of man-made fiber boards | |
| CN109485189A (en) | Ca in high concentration chaff interferent waste water2+And SO42-Intermediate processing | |
| CN105084943A (en) | Low-cost waste water phosphorus fertilizer production technology | |
| CN203021377U (en) | High-concentration liquid waste processing system | |
| CN202170278U (en) | Stream and river water pollution treatment device for rare earth mining area | |
| CN202156940U (en) | High ammonia-nitrogen sewage treatment system | |
| CN205076808U (en) | Waste water phosphorus fertilizer production composite set |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |