CN101259474A - Method for recuperating sewage sludge with city garbage burning flying ash and alkali - Google Patents
Method for recuperating sewage sludge with city garbage burning flying ash and alkali Download PDFInfo
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- CN101259474A CN101259474A CNA2008100363635A CN200810036363A CN101259474A CN 101259474 A CN101259474 A CN 101259474A CN A2008100363635 A CNA2008100363635 A CN A2008100363635A CN 200810036363 A CN200810036363 A CN 200810036363A CN 101259474 A CN101259474 A CN 101259474A
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- mud
- alkali
- garbage burning
- city garbage
- flying ash
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- Processing Of Solid Wastes (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention relates to a method for mud conditioning together by incineration fly ash of urban garbage and alkal and belongs to the technical field of environment engineering. The method carries out mud conditioning by using the alkali together with the incineration fly ash of urban garbage under a normal temperature; the mud and the fly ash are mixed according to a certain proportion; then are stirred by a machine, stood and deposited. The volume of the mud through conditioning can be reduced to about 40 percent of the original mud volume; the flocculating constituent of the mud is larger and the largest deposition speed can reach 20cm/min. The technique of mud conditioning together by incineration fly ash of urban garbage and alkali of the invention can be used as a pretreatment of mud resources and realizes the unification of economy, sociality and environmental performance of the mud resources.
Description
Technical field
The present invention relates to the method for a kind of city garbage burning flying ash and alkali recuperating sewage sludge, belong to field of environment engineering technology.
Background technology
Along with the raising of sanitary sewage and treatment rate of industrial effluents, the output of mud is increasing.Since moisture percentage in sewage sludge high (can up to more than 99.5%), and dewatering is poor, thereby make the expense of mud subsequent treatment and disposal sharply increase.Therefore, how to improve the dewatering of mud, reduce the Treatment of Sludge expense and become important research project of countries nowadays.Add a kind of as chemical conditioning method of chemical agent, because simple to operate, expense is lower and be widely adopted.At present, sludge conditioning mainly contain lime, aluminium salt, molysite series and high polymer coagulant etc., because it has the effect of the mud of making elimination of colloid stability, can reach the good solid-liquid separating effect, improve the sludge dewatering effect, but higher by the resulting mud flco of high polymer coagulant adsorption bridging effect moisture content, and financial cost is higher.For city garbage burning flying ash, its main component is SiO
2, Al
2O
3, CaO, Fe
2O
3, Na
2O, K
2O etc.Owing to wherein contain multiple poisonous metal and the salt and the hypertoxic organic pollutions such as bioxin and furans such as Pb, Cd, Zn of the higher concentration that can be gone out by water logging, be the hazardous waste of listing China's " national hazardous waste register " in therefore.It contains in a large number for the needed calcium salt of sludge conditioning process, aluminium salt, molysite and cation potassium sodium etc. as can be seen from the composition of city garbage burning flying ash, is a kind of good cheap sludge conditioner.
Summary of the invention
The object of the present invention is to provide the method for a kind of city garbage burning flying ash and alkali recuperating sewage sludge.
For achieving the above object, the present invention adopts following technical scheme:
The method of a kind of city garbage burning flying ash and alkali recuperating sewage sludge, it is characterized in that this method takes following technology: under the normal temperature, transfer in 8～10 scopes with the fresh excess sludge pH value of highly basic moisture content 98～99%, add city garbage burning flying ash, in mud and flying dust ratio is to mix in 1: 8～1: 12, and wherein sludge volume unit is for rising, and the flying dust mass unit is gram, mechanical agitation 3～5min staticly settles 30min then.
Described highly basic is the flocculation aid of city garbage burning flying ash conditioning mud, and highly basic is NaOH, KOH etc.
The present invention nurses one's health the flocculating setting effect that improves mud to uniting of municipal sludge jointly by alkali and city garbage burning flying ash, thereby improves mud subsequent treatment ability and treatment effect.
The present invention transfers to mud with alkali and to add an amount of flying dust after the certain pH scope at normal temperatures, and the aluminium oxide in the flying dust generates mononuclear complex Al (OH) in the strong basicity environment
2+And Al (OH)
2 +Again by the further condensation of collision, generate a series of polynuclear complexes Deng, mononuclear complex, have higher positive charge and specific area, in and the negative electrical charge of mud colloid surface, make the mud elimination of colloid stability, promote the flocculating setting performance of mud.The advantage that adds flying dust conditioning mud after with the alkali preliminary treatment again is: the one, do under the condition of flocculation aid the common processing of two kinds of difficult refuses of danger at alkali; The 2nd, under alkali condition, utilize the high salt characteristic conditioning of the high calcium municipal sludge in the incineration of refuse flyash, improve the flocculating setting performance of mud, alleviate the excessive burden of follow-up mud handling capacity; The 3rd, economically, can resource behind the flying dust conditioning mud or both handle its processing cost jointly and will be far smaller than the expense that two difference are handled separately.Nurse one's health another kind of hazardous waste municipal sludge with a kind of hazardous waste city garbage burning flying ash as flocculant, compare with other flocculant such as aluminium system, iron system and high polymer coagulant and have very big advantage economically.
The present invention can make the precipitating sludge volume reduce to about 40% of raw sewage volume, and the mud flco is bigger, and maximum settlement speed can reach 20cm/min.
City garbage burning flying ash of the present invention and alkali recuperating sewage sludge technology can be used as the preliminary treatment of recycling sludge, realize the unified mutually of the economy of recycling sludge, social and environment.
The specific embodiment
Now embodiments of the invention are described in the back:
Embodiment 1
At normal temperatures, transfer in 8～10 scopes with the fresh excess sludge pH value of NaOH highly basic moisture content 98～99%, add city garbage burning flying ash then, in mud and flying dust ratio is to mix at 1: 10, wherein sludge volume unit is for rising, the flying dust mass unit is gram, and mechanical agitation 3～5min staticly settles 30min then.The precipitating sludge volume can be reduced to about 40% of raw sewage volume, and the mud flco is bigger, and maximum settlement speed can reach 20cm/min.
Claims (2)
1. the method for city garbage burning flying ash and alkali recuperating sewage sludge, it is characterized in that this method takes following technology: under the normal temperature, transfer in 8～10 scopes with the fresh excess sludge pH value of highly basic moisture content 98～99%, add city garbage burning flying ash, in mud and flying dust ratio is to mix in 1: 8～1: 12, and wherein sludge volume unit is for rising, and the flying dust mass unit is gram, mechanical agitation 3～5min staticly settles 30min then.
2. the method for claim 1 is characterized in that described highly basic is the flocculation aid of city garbage burning flying ash conditioning mud, and highly basic is NaOH, KOH etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100363635A CN101259474A (en) | 2008-04-21 | 2008-04-21 | Method for recuperating sewage sludge with city garbage burning flying ash and alkali |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100363635A CN101259474A (en) | 2008-04-21 | 2008-04-21 | Method for recuperating sewage sludge with city garbage burning flying ash and alkali |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101259474A true CN101259474A (en) | 2008-09-10 |
Family
ID=39960288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100363635A Pending CN101259474A (en) | 2008-04-21 | 2008-04-21 | Method for recuperating sewage sludge with city garbage burning flying ash and alkali |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101259474A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102319716A (en) * | 2011-06-02 | 2012-01-18 | 福建工程学院 | Covering layer of sanitary landfill |
| CN103524014A (en) * | 2013-10-08 | 2014-01-22 | 大连东泰产业废弃物处理有限公司 | Harmless treatment method of fly ash |
| CN105439535A (en) * | 2015-11-09 | 2016-03-30 | 四川环奥污泥处置技术有限公司 | Physical and chemical property conditioner for dried/semidried sludge and application method of physical and chemical property conditioner |
| CN109608004A (en) * | 2018-12-07 | 2019-04-12 | 博天环境集团股份有限公司 | A method of improving dewatering performance of sludge |
-
2008
- 2008-04-21 CN CNA2008100363635A patent/CN101259474A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102319716A (en) * | 2011-06-02 | 2012-01-18 | 福建工程学院 | Covering layer of sanitary landfill |
| CN102319716B (en) * | 2011-06-02 | 2013-02-13 | 福建工程学院 | Covering layer of sanitary landfill |
| CN103524014A (en) * | 2013-10-08 | 2014-01-22 | 大连东泰产业废弃物处理有限公司 | Harmless treatment method of fly ash |
| CN105439535A (en) * | 2015-11-09 | 2016-03-30 | 四川环奥污泥处置技术有限公司 | Physical and chemical property conditioner for dried/semidried sludge and application method of physical and chemical property conditioner |
| CN105439535B (en) * | 2015-11-09 | 2018-04-03 | 四川环奥污泥处置技术有限公司 | Desiccation/semi-oriented sludge physicochemical property conditioner, application process |
| CN109608004A (en) * | 2018-12-07 | 2019-04-12 | 博天环境集团股份有限公司 | A method of improving dewatering performance of sludge |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080910 |