CN86106871B - Treatment of organic waste water in the process of paper making with diatomaceous earth - Google Patents
Treatment of organic waste water in the process of paper making with diatomaceous earth Download PDFInfo
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- CN86106871B CN86106871B CN86106871A CN86106871A CN86106871B CN 86106871 B CN86106871 B CN 86106871B CN 86106871 A CN86106871 A CN 86106871A CN 86106871 A CN86106871 A CN 86106871A CN 86106871 B CN86106871 B CN 86106871B
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- China
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- diatomite
- waste water
- treatment
- soil
- activated
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Abstract
The present invention discloses a technology for treating waste water by diatomite. Before being activated, the used diatomite is treated by a special calcination piece, and thus, has strong treatment efficacy. The technology is used for the treatment of various kinds of organic waste water, is especially suitable for the treatment of paper-making waste water with high COD content and great treatment difficulty, has the decolorizing rate of 90% to 99%, the COD removing rate of 60% to 85% and the treatment cost of 0.08 to 0.11 yuan/per ton of waste water. The technology has the advantages of simple process, low cost, obvious treatment efficiency, avoidance of secondary pollution by sludge and solution of the problem of multiple circulation use of the diatomite.
Description
The present invention relates to a kind of improved diatomite treatment water technology, can be used for the processing of various organic waste waters, be particularly suited for handling the paper waste that COD content is higher, colourity is dark, intractability is quite big.
Existing diatomite treatment water technology, be earlier diatomite original ore stone to be pulverized, adding acid activation then handles, in the middle of the waste water of activated soil prior modulated good pH of input after adding water to go residual acid, dispose, do not reach emission standard because of wastewater pH is lower, also need earlier with milk of lime neutralizing treatment in addition, the mud after the processing dewaters after filtration and is separated.Such technological process exists following some shortcomings:
One. the activity of diatomite treatment agent is not high, and the treatment effect of waste water only is embodied on the decolouring, and the COD clearance is lower than 50%, has so just directly influenced treatment effect and range of application.
Two. the activation acid consumption is big, and activated soil per ton needs sulfuric acid (96%H
2SO
4) 500 kilograms, processing cost is corresponding have been improved.
Three. the residual sludge quantity that decolorization produces greatly and do not give comprehensive utilization has caused the secondary pollution of mud.
Based on above deficiency, at present both at home and abroad to the application of diatomite treatment water technology, the successful dyeing waste water that is only limited to COD content lower (800mg/l is following).
The objective of the invention is to provide a kind of can being applicable to handle various organic waste waters, be applicable to that especially handling COD content is higher than 1000mg/l, and with the treatment technology of the not good enough organic waste water of other treatment process effect.
Fig. 1 is diatomite processing process figure of the present invention.Fig. 2 is a process flow sheet of handling waste water with treatment agent of the present invention.
One of major advantage of the present invention is to be embodied in the preparation of diatomite treatment agent, promptly before activation, will be crushed to 50～80 purpose diatomite original ore powder earlier and carry out calcination processing, the incinerating effect is (600～800 ℃) at a certain temperature, the organism of filling between diatomite micropore and diatom test can not only be removed and make it to increase diatomaceous specific surface area is outside the adsorptive power, and can also make oxide compounds such as iron in the diatomite, aluminium, calcium dissociate out, make it in reactivation process, to be easy to be combined into the salt of solubility with acid.The reactive chemistry formula is as follows:
AL
2O
32SiO
22H
2O calcines 2～3 hours/600～800 ℃ AL
2O
3+ 2SiO
2+ H
2O
AL
2O
3+ H
2SO
4Activate 1 hour/80～100 ℃ AL
2(SO
4)
3+ H
2O
Or:
AL
2O
3+ HCL activates 1 hour/80～100 ℃ ALCL
3+ H
2O
These salts through hydrolytic action, have formed the very strong polymkeric substance of coagulation in waste water.Moreover, so also just increased diatomaceous specific surface area again, thereby also just strengthened adsorptive power because the stripping of metal oxide has also increased diatomaceous micropore greatly.Therefore the diatomite through calcining and activating has not only possessed adsorptive power and coagulation simultaneously, and adsorptive power also greatly strengthens without the incinerating activated soil, so this diatomite treatment agent is naturally than the applied range of prior art, treatment effect is good, in fact, it is not limited only to the processing of dyeing waste water, when handling other various organic waste waters or even handle COD content up to the paper waste of 2000～3000mg/l, percent of decolourization also can be up to 90～99%, and it is 60～85% that COD goes the rate of falling.
Two of major advantage of the present invention is the problem of complex utilization that solved the reprocessing cycle use of diatomite mud or be processed into other products.Concrete grammar is after the diatomite mud behind the processing waste water is separated after filtration, to calcine, activate.
2～3 hours/600～800 ℃ → calcination and regeneration of mud calcining soil
1 hour/80～100 ℃ → calcining and activating of sulfuric acid or hydrochloric acid activation is the immature soil again
The reprocessing cycle of mud is used, and has both avoided secondary pollution, has reduced processing cost again, only reprocessing cycle is one, can reduce cost about 50%, and, can also create the net return of 0.062 yuan/waste water per ton if calcination and regeneration soil is directly sold as lagging material or material of construction.
It is low that three of major advantage of the present invention is to activate acid consumption, because incinerating Decomposition, oxide compounds such as iron, aluminium, calcium are easy to combine with sour, activation transformation efficiency height, acid consumption just reduces greatly, no matter be just system or regeneration, activated soil per ton only needs 70～200 kilograms in sulfuric acid, or 200～300 kilograms of hydrochloric acid.
In addition, the present invention having removed that residual acid is gone in dehydration from and with in the milk of lime and two procedures on treatment process.As long as this is to keep residual acid amount 1～5% because guaranteed activated soil, and at the waste water of different COD content, throw in corresponding an amount of diatomite treatment agent separately, wastewater treatment just can reach best pH separately.After treatment, this waste water can reach pollution exhaust criteria and need not earlier through neutralization.
The diatomite treatment agent injected volume of the waste water of different COD content sees the following form:
| COD content (mg/l) | Diatomite treatment agent input amount (g/l) |
| Below 900 | 0.3～1.0 |
| 900～1500 | 1.0～1.6 |
Claims (7)
1, a kind of method of handling waste water is that the diatomite treatment agent is mixed with waste water, filters then, it is characterized in that:
A. the diatomite original ore powder will carry out calcination processing earlier before activation,
B. the diatomite mud after the activation treatment obtains regeneration, can be recycled or calcined earth is made lagging material use.
2, according to the method for claim 1, it is characterized in that initial silicon algae soil or bio-diatomite again, the incinerating time is 2～3 hours, calcining temperature is controlled at 600～800 ℃.
3, according to the method for claim 1 or 2, it is characterized in that initial silicon algae soil or bio-diatomite again, activated soil per ton needs sulfuric acid (96%H
2SO
4) 70～200 kilograms, it is 1～5% that activated soil keeps residual acid amount.
4, according to the method for claim 1 or 2, it is characterized in that initial silicon algae soil or bio-diatomite again, activated soil per ton needs hydrochloric acid (36%HCL) 200～300 kilograms, and it is 1～5% that activated soil keeps residual acid amount.
5, according to the method for claim 1, the input amount that it is characterized in that the diatomite treatment agent is the former water of 0.3～3.0 grams per liter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86106871A CN86106871B (en) | 1986-10-31 | 1986-10-31 | Treatment of organic waste water in the process of paper making with diatomaceous earth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86106871A CN86106871B (en) | 1986-10-31 | 1986-10-31 | Treatment of organic waste water in the process of paper making with diatomaceous earth |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86106871A CN86106871A (en) | 1988-03-16 |
| CN86106871B true CN86106871B (en) | 1988-04-27 |
Family
ID=4803395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN86106871A Expired CN86106871B (en) | 1986-10-31 | 1986-10-31 | Treatment of organic waste water in the process of paper making with diatomaceous earth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86106871B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100453471C (en) * | 2007-04-24 | 2009-01-21 | 浙江三鼎科技有限公司 | Preparation method for organic polymer-diatomaceous soil composite coagulating agent |
| CN101746842B (en) * | 2008-12-12 | 2011-12-07 | 同济大学 | Coupling water supply purifying method of biological reinforced powder active carbon and diatomite |
| CN105481075A (en) * | 2016-02-02 | 2016-04-13 | 临江市大塬硅藻土新材料生态环保科技有限公司 | Diatomite papermaking wastewater treatment agent and preparation method |
| CN105622867A (en) * | 2016-03-31 | 2016-06-01 | 太仓市锦达印染有限公司 | Printing and dyeing wastewater treating agent as well as preparation method and application thereof |
| CN110734654B (en) * | 2018-07-19 | 2021-06-15 | 河北德龙环境工程股份有限公司 | Antifouling coating material for water treatment membrane and preparation method and application thereof |
-
1986
- 1986-10-31 CN CN86106871A patent/CN86106871B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN86106871A (en) | 1988-03-16 |
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