CN1079378C

CN1079378C - Method of producing granular enzymetic filling for treating waste water

Info

Publication number: CN1079378C
Application number: CN97107306A
Authority: CN
Inventors: 龙腾锐; 郭劲松
Original assignee: CHONGQING ARCHITECTURE UNIV
Current assignee: CHONGQING ARCHITECTURE UNIV
Priority date: 1997-01-07
Filing date: 1997-01-07
Publication date: 2002-02-20
Anticipated expiration: 2017-01-07
Also published as: CN1187469A

Abstract

The present invention relates to a production method for wastewater treatment granular enzymatic fillers, which belongs to the technical field of environmental engineering. The production method solves technical problems, so that the micropore distribution and the structure of the fillers are ideal, the pore diameter of each micropore is sufficient for enzyme molecules to enter, and the fillers contain catalysts promoting microorganism growth. The fillers have higher mechanical strength, so that higher wastewater treatment efficiency and better wastewater treatment effect are obtained. The production method is characterized in that clay is used as main aggregate, peat is used as auxiliary aggregate, and a pore forming agent and a reinforcing agent are added. The mixture is pulverized, plasticized, formed, naturally dried, burnt, milled and pulverized, and sieved, so that a finished product is obtained. The production method is suitable for various filtering beds for wastewater treatment.

Description

The production method of granular enzymetic filling for treating waste water

The invention belongs to field of environment engineering technology.

(comprise fixed bed, thermopnore, expanded bed, fluidized-bed) in the used filter bed of wastewater treatment, filler is very crucial part.The filler that wastewater treatment is at present adopted mostly is quartz sand, zeolite, plastics, silica gel, soft or medium-soft fiber, coke, activated carbon, haydite etc.These fillers are used for biochemical treatment waste water its weakness is then respectively arranged: they or smooth surface, microorganism is difficult to biofilm; Or intensity is not high, badly broken; Or be worth expensive, regeneration difficulty (gac), and almost present employed filler does not possess the characteristic of catalysis microorganism growth, simultaneously, its surface is not have micropore or micropore size is too little, the enzyme molecule of microorganism or microorganism can't be entered, thereby be difficult to form biomembranous solid netted space structure.

The objective of the invention is to make the micropore of filler to distribute and the structure ideal, the enzyme molecule of microorganism or microorganism is entered, and containing the granular enzyme-catalyzed packing that promotes the microorganism growth catalyzer, its physical strength height is to obtain higher efficient and the better effect of wastewater treatment.

The production method of granular enzyme-catalyzed packing: the microorganism growth accelerant C that in filler, contains 20 μ g/g ₀ ²⁺, have that dissolved is active to be 1.0mg/L, filler is an aggregate with 75% clay, is the fibula material with 25% mud coal by weight percentage, and add contain aggregate gross weight 8% pore-forming material and toughener---its weight proportion is Fe ₂O ₃: wood chip: Na salt or K salt=4: 8: 1, through fragmentation and plasticizing, moulding, natural mummification, fired again intensification 6 hours is to 1050 ℃ of firing temperatures, constant temperature 30 minutes airtightly is cooled to below 400 ℃ the blow-on rapid cooling, and, get product through the fragmentation of milling, screening.

Processing step of the present invention is as follows:

[raw material and various addition material] → broken and plasticizing → moulding → natural mummification → fire → mill fragmentation → screening → finished product

Advantage of the present invention and effect:

1. in the aggregate of filler, mix 25% mud coal, and mud coal belongs to the waste of coal washery, has the advantage of utilization of waste material and clean environment;

2. this filler has the microorganism growth of promotion and the active characteristics of activating microorganisms, makes microorganism biofilm time on filler shorten 20～30 days than customary filler, improves the efficient of wastewater treatment;

3. the micropore pore volume of this filler is big, and the aperture is enough to allow the enzyme molecule enter, and can improve the biomass in the reactor to greatest extent.

Figure of description and technical process explanation:

From raw material fetch clay, mud coal, and drop into various additives in proportion, be broken into fine particle through pulverizer, with spades above-mentioned all materials are mixed thoroughly, adding tap water then, to stir into water ratio be 70～80% plastic clod, be fragmentation and plasticizing process, again with shaper or bolus processing machine with its particle of making 1～3cm, be moulding process.Again through natural air drying, promptly natural drying process.To send into the high-temperature electric resistance furnace sintering through air-dry material, fired technology; Even electric furnace heated up 6 hours, reach 1050 ℃ after, constant temperature 30 minutes, airtight again being cooled to below 400 ℃, the blow-on rapid cooling is promptly fired and is finished.Again the material that burns till is dropped into ball mill and smash, promptly through the fragmentation of milling.Afterwards, sieve with the filler standard sieve again, can obtain the serial finished product of certain particle size range.

Embodiments of the present invention;

1. all producers that possesses following equipment can produce.

Equipment: the factory building of the crusher of milling, plasticizing machine, shaper, standard sieve, electric mantle heater and certain area.

2. with urban construction institute of Chongqing Univ. of Architecture combination producing.

3. laboratory implementation example---from raw material fetch clay, mud coal, be broken into fine particle through pulverizer, add additive in proportion, above-mentioned all materials are mixed thoroughly with spades, add the plastic clod that tap water stirs into water ratio 70～80% then, be fragmentation and plasticizing process; Again with shaper or bolus processing machine (laboratory meat mincer) with its particle of making 1～3cm, be moulding process; Natural air drying is the nature drying process, will send into the high-temperature electric resistance furnace sintering through air-dry material; Smash with ball mill by the material that sintering technology burns till, sieve into the serial finished product of certain particle size range afterwards again with the filler standard sieve.

4. suitability for industrialized production---produce available industrial furnace or kiln and used plant in enormous quantities, then need be determined the model and the form of equipment according to turnout.

Claims

1. the production method of a granular enzyme-catalyzed packing is characterized in that containing in the filler microorganism growth accelerant C of 20 μ g/g ₀ ²⁺, have that dissolved is active to be 1.0mg/L, filler is main aggregate with 75% clay, is the fibula material with weight percent 25% mud coal, and add contain aggregate gross weight 8% pore-forming material and toughener---its weight proportion is Fe ₂O ₃: wood chip: Na salt or K salt=4: 8: 1, through fragmentation and plasticizing, moulding, natural mummification, fired again intensification 6 hours is to 1050 ℃ of firing temperatures, constant temperature 30 minutes airtightly is cooled to below 400 ℃ the blow-on rapid cooling, and, get product through the fragmentation of milling, screening.