Unlock instant, AI-driven research and patent intelligence for your innovation.

Dephosphorizing crystal seed for porous haydite and its prepn

A technology of porous ceramics and crystal seeds, which is applied in ceramic products, chemical instruments and methods, and other household appliances, etc., can solve the problems of difficult popularization and application of engineering, clogging of crystal bed, poor mechanical strength, etc., and achieve good phosphorus removal effect and effect. Good, good mechanical strength effect

Inactive Publication Date: 2004-11-17
SOUTHEAST UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used crystal seed is natural phosphate rock (it contains phosphorus and calcium components, and has a lattice similar to calcium hydroxyphosphate), but its mechanical strength is poor, it is easy to break, and the ore powder is fine, and it is easy to form a crystallization bed in the process of wastewater treatment. It is easy to be washed away during backwashing, and it is difficult to popularize and apply it in engineering

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] Take a certain specification of porous ceramsite (specific surface 8-12m 2 / g, bulk density 1.5-2.0g / cm 3 ), in water with a pH of 8.5-10 and a mass ratio of Ca:P=3:1 to 5:1, cultivated at a certain stirring speed for 12-24 hours, and the porous ceramsite crystal seeds can be cultivated. Fill the crystallization bed with this seed crystal, which can be used for crystallization and phosphorus removal of phosphorus-containing wastewater. When phosphorus-containing wastewater passes through the porous ceramsite crystal seed under certain conditions, the phosphorus and calcium in the water are induced by the porous ceramsite crystal seed. It destabilizes and precipitates on the surface of the seed crystal in the form of calcium phosphate crystals, thereby removing phosphorus in water, and its phosphorus removal rate can reach more than 80%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention relates to stuffing for dephosphorizing in waste water crystallizing bed, and is especially one efficient and practical crystal seed for porous haydite. The crystal seed is loaded in porous haydite carrier with one surface layer of calcium phosphate crystal. The preparation process includes the steps of: adding porous haydite into phosphate culture liquid, regulating pH value to 8.5-10 and Ca / P mass ratio to 3-5 and culture for 12-24 hr to obtain dephosphorizing crystal seed in porous haydite. The crystal seed has fast dephosphorizing speed, high dephosphorizing effect, moderate granularity, light weight, high chemical stability, enough mechanical strength, simple culture process and low cost.

Description

technical field [0001] The invention relates to a filler for phosphorus removal in a waste water crystallization bed, in particular to an efficient and practical crystal seed cultivated with porous ceramsite. Background technique [0002] Phosphorus removal by crystallization method is to add a solid particle with structure and surface properties similar to insoluble phosphate to the phosphorus-containing wastewater that has been added with calcium salt, so as to destroy the metastable state of the solution and make the phosphate crystallize and precipitate at a practical speed. , so as to achieve the purpose of dephosphorization. At present, the commonly used crystal seed is natural phosphate rock (it contains phosphorus and calcium components, and has a lattice similar to calcium hydroxyphosphate), but its mechanical strength is poor, it is easy to break, and the ore powder is fine, and it is easy to form a crystallization bed in the process of wastewater treatment. It is...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C02F1/52C02F1/58C02F1/68C04B14/02C04B38/00
Inventor 张林生叶峰吴海锁
Owner SOUTHEAST UNIV