CN103482845A - Composite sludge concentration dehydration conditioner - Google Patents
Composite sludge concentration dehydration conditioner Download PDFInfo
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- CN103482845A CN103482845A CN201310360687.5A CN201310360687A CN103482845A CN 103482845 A CN103482845 A CN 103482845A CN 201310360687 A CN201310360687 A CN 201310360687A CN 103482845 A CN103482845 A CN 103482845A
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- flocculation agent
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Abstract
The invention discloses a composite sludge concentration dehydration conditioner which mainly comprises a nonionic flocculation agent, dimethylamine, methylamine and an anionic flocculation agent in a weight ratio of 7:6:2:1, wherein the nonionic flocculation agent is nonionic polyacrylamide; and the anionic flocculation agent is prepared by carrying out graft copolymerization on organic monomer polyacrylamide and chitosan. The composite sludge concentration dehydration conditioner is compounded from the nonionic flocculation agent, anionic flocculation agent, dimethylamine and methylamine, thereby obviously improving the sludge dehydration property; and the cost of the nonionic flocculation agent is lower than that of the common cationic flocculation agent. Besides, the composite sludge concentration dehydration conditioner can be added simultaneously or step by step, and thus, can be easily popularized and used.
Description
Technical field
The present invention relates to a kind of sludge concentration and dewatering amendment, relate in particular to a kind of compound type sludge thickening amendment.
Background technology
The quickening of urbanization process causes the sludge of sewage treatment plant amount growing.Mud granule is little, organic content is high, water ratio is high, and dehydration is difficult, becomes the bottleneck problem of & Mud.Must carry out physics before sludge dewatering, chemical conditioning improves its dewatering, be convenient to subsequent disposal and dispose.Chemical conditioning is reliable for effect, and equipment is simple, easy to operate, by long-term, is extensively adopted.And the core of chemical conditioning is exactly the research and development of amendment.
Principle and method generally with reference to water treatment flocculation medicament, prepared by the exploitation of existing sludge conditioner.But the purpose of sewage disposal is to improve the settling property of suspended substance in sewage, sludge conditioning focuses on the dewatering that improves mud, so can improve the amendment of suspended substance sedimentation performance, not necessarily can significantly improve the dewatering of mud.Therefore, the sludge conditioner of single component often can't reach desirable dehydrating effect, the exploitation of sludge conditioner should be in conjunction with the follow-up disposal of mud own characteristic and mud, use compound amendment or the composite use of amendment is contributed to bring into play synergistic effect, can reach than the better dehydrating effect of independent use.In addition, the moisture content of the cake after present stage Sewage Plant dehydration, up to 80% left and right, brings difficulty to the follow-up disposal such as sanitary landfill, burning.In order further to reduce moisture percentage in sewage sludge, also be necessary to research and develop compound amendment or by the composite use of amendment, to improve the dewatering of mud.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of compound type sludge thickening amendment, can significantly improve dewatering performance of sludge and cost is lower, can be simultaneously or substep add, be easy to promote the use of.
The present invention solves the problems of the technologies described above the technical scheme adopted to be to provide a kind of compound type sludge thickening amendment, and main ingredient is: nonionic flocculation agent, dimethylamine, methylamine and negatively charged ion flocculation agent.
Above-mentioned compound type sludge thickening amendment, wherein, described nonionic flocculation agent, dimethylamine, methylamine and negatively charged ion flocculation agent are 7:6:2:1 by ratio of weight and the number of copies.
Above-mentioned compound type sludge thickening amendment, wherein, described nonionic flocculation agent is non-ionic polyacrylamide, described negatively charged ion flocculation agent is made by organic monomer polyacrylamide and chitosan graft copolymerization.
Above-mentioned compound type sludge thickening amendment, wherein, described nonionic flocculation agent is non-ionic polyacrylamide, described negatively charged ion flocculation agent is made through Mannich reaction by calcium lignosulfonate and acrylamide grafted copolymer.
Above-mentioned compound type sludge thickening amendment, wherein, described nonionic flocculation agent is non-ionic polyacrylamide, described negatively charged ion flocculation agent is reacted the composite flocculation agent made with bodied ferric sulfate by dimethyl diallyl ammonium chloride.
Above-mentioned compound type sludge thickening amendment, wherein, described bodied ferric sulfate mass concentration is 422mg/L, described dimethyl diallyl ammonium chloride mass concentration is 30mg/L.
The present invention contrasts prior art following beneficial effect: compound type sludge thickening amendment provided by the invention, adopt nonionic flocculation agent and negatively charged ion flocculation agent also with dimethylamine, methylamine, to carry out compound proportioning, thereby significantly improve dewatering performance of sludge and nonionic flocculation agent cost lower than positively charged ion flocculation agent commonly used.In addition, compound type sludge thickening amendment can add simultaneously or step by step, thereby is easy to promote the use of.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
Compound type sludge thickening amendment provided by the invention, main ingredient is: nonionic flocculation agent, dimethylamine, methylamine and negatively charged ion flocculation agent.
Compound type sludge thickening amendment provided by the invention, wherein, described nonionic flocculation agent is preferably non-ionic polyacrylamide, and described negatively charged ion flocculation agent is preferably anionic polyacrylamide.Polyacrylamide is called for short acid amides, has another name called flocculation agent, English code name (PAM).Classification: anionic polyacrylamide (APAM), cationic polyacrylamide (CPAM), non-ionic polyacrylamide (NPAM).
Because organic polymer coargulator is adding less, flocculation ability is strong, but have difficult degradation, bio-toxicity arranged, the high in cost of production problem; The inorganic polymer flocculant price is lower, but consumption is large, and easily residual aluminum, iron etc. cause secondary pollution, and therefore the composite use of an organic inorganic polymer flocculant contributes to make up the deficiency of independent use.Organic conditioning mechanism from inorganic polymer flocculant is different, and composite use contributes to each component to play one's part to the full, and strengthens conditioning effect.The carbonium that inorganic polymer flocculant ionizes out in water can in and sludge surface charge, compression double electric layer, reduce the Zeta potential of particle, reduces mud granule and ask repulsion, promotes cohesion.Organic polymer coargulator dissolves and ionization occurs and adsorb with the solid particulate of mud by hydrogen bond, covalent linkage etc. in water.The polymeric flocculant molecular chain is very long, and a lot of active cation groups are arranged on chain, can in water, fully stretch and cohere simultaneously a plurality of particles, forms floc sedimentation.The present invention has tested the effect of the composite use of multiple organic floculant, and composite component mainly concentrates on negatively charged ion, positively charged ion, nonionic superpolymer and natural macromolecule flocculating agent.Syn-Organic flocculants conditioning cost is higher, and the flocculation raw material is wide, price is low; The monomer of sludge conditioner PAM commonly used easily remains in mud, have " three cause " effect, and that flocculation has is nontoxic, be easy to the characteristics such as biological degradation, both are composite can reduce the toxicity of mud after conditioning, promote cohesion, composite use simultaneously has remarkable economy.
Compound type sludge thickening amendment provided by the invention, wherein, preferably non-ionic polyacrylamide is the nonionic flocculation agent, anionic polyacrylamide is the negatively charged ion flocculation agent, and described non-ionic polyacrylamide, dimethylamine, methylamine and anionic polyacrylamide are preferably 7:6:2:1 by ratio of weight and the number of copies.As added respectively the 70kg non-ionic polyacrylamide, the 60kg dimethylamine, 20kg methylamine and 10kg anionic polyacrylamide form translucent lacteous or micro-light yellow thick glue body that dissolves; Viscosity >=180～220mm2/s(20 ℃); Proportion (degree Beaume): 1.18; Dissolving the thick glue body is watered and is diluted to water-soluble polymer polyacrylamide mud Off water amendment dosage 30-50ppm.
The composite conditioner complicated process of preparation, the present invention can adopt chitosan (CTS) and organic monomer acrylamide (AM) graft copolymerization to make chitosan derivatives (CAM); The composite use of amendment refers to different amendments coordinated according to certain ratio, simultaneously or substep add, make its performance synergy and significantly improve the means of dewatering performance of sludge.CAM and anionic polyacrylamide (APAM) carry out compound, obtain composite flocculation agent CAM-APAM, for nursing one's health mud.Best results when CAM-APAM add-on is 30mg/L, dewatering rate reaches 90%; And use separately CTS, when optimal addn is 40mg/L, dewatering rate is only 65% left and right.Test of many times is synthesized two kinds of chitose graft copolymers with APAM or CPAM by graft copolymerization respectively by CTS.Wherein, anionic copolymer conditioning effect optimum, can make moisture content of the cake descend 9.4%, and use separately the moisture content of the cake after the CTS conditioning only to descend 7.6%.In experiment, utilize calcium lignosulfonate and acrylamide grafted copolymer to react through Mannich that (aldehyde that contains the a-reactive hydrogen, ketone react with formaldehyde and amine (primary amine, secondary amine or ammonia), an a-reactive hydrogen is by the amine methyl substituted as a result, this reaction is called again Mannich reaction) prepare both sexes flocculation dewatering agent LSDC conditioning mud, sludge specific resistance has reduced by 59%, dewatering rate can reach 87%, than high 22% left and right of dewatering rate of independent use CPAM conditioning.In addition, for example, aspect an inorganic organic composite amendment: with reinforcing yin essence ionic electrolytes Poly Dimethyl Diallyl Ammonium Chloride (PDMDAAC), with bodied ferric sulfate (PFS), react and make composite flocculation agent.When PFS mass concentration (take Fe) as 422mg/L, PDMDAAC mass concentration more suitable during as 30mg/L, after conditioning, sludge specific resistance has reduced by 91.6%, more 30.4% than adding separately equivalent PFS to survey sludge specific resistance reduced rate after reason, than the sludge specific resistance reduced rate many 5.9% of the PDMDAAC conditioning of independent use 50mg/L.An inorganic anionic polymer composite flocculation agent mainly strengthens the charge neutrality effect to mud electronegativity flco by increasing negative charge density, to reach the flocculation synergism.
Although the present invention discloses as above with preferred embodiment; so it is not in order to limit the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little modification and perfect, so protection scope of the present invention is worked as with being as the criterion that claims were defined.
Claims (6)
1. a compound type sludge thickening amendment, is characterized in that, main ingredient is:
Nonionic flocculation agent, dimethylamine, methylamine and negatively charged ion flocculation agent.
2. compound type sludge thickening amendment as claimed in claim 1, is characterized in that, described nonionic flocculation agent, dimethylamine, methylamine and negatively charged ion flocculation agent are 7:6:2:1 by ratio of weight and the number of copies.
3. compound type sludge thickening amendment as claimed in claim 1, is characterized in that, described nonionic flocculation agent is non-ionic polyacrylamide, and described negatively charged ion flocculation agent is made by organic monomer polyacrylamide and chitosan graft copolymerization.
4. compound type sludge thickening amendment as claimed in claim 1, it is characterized in that, described nonionic flocculation agent is non-ionic polyacrylamide, and described negatively charged ion flocculation agent is made through Mannich reaction by calcium lignosulfonate and acrylamide grafted copolymer.
5. compound type sludge thickening amendment as claimed in claim 1, it is characterized in that, described nonionic flocculation agent is non-ionic polyacrylamide, and described negatively charged ion flocculation agent is reacted the composite flocculation agent made with bodied ferric sulfate by dimethyl diallyl ammonium chloride.
6. compound type sludge thickening amendment as claimed in claim 5, is characterized in that, described bodied ferric sulfate mass concentration is 422mg/L, and described dimethyl diallyl ammonium chloride mass concentration is 30mg/L.
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| CN201310360687.5A CN103482845A (en) | 2013-08-17 | 2013-08-17 | Composite sludge concentration dehydration conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104261540A (en) * | 2014-10-09 | 2015-01-07 | 成都冠禹科技有限公司 | Flocculating agent for treating electroplating wastewater, preparation method and application of flocculating agent |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101700921A (en) * | 2009-11-26 | 2010-05-05 | 上海复泽环境科技有限公司 | Polymer coagulant |
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- 2013-08-17 CN CN201310360687.5A patent/CN103482845A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101700921A (en) * | 2009-11-26 | 2010-05-05 | 上海复泽环境科技有限公司 | Polymer coagulant |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104261540A (en) * | 2014-10-09 | 2015-01-07 | 成都冠禹科技有限公司 | Flocculating agent for treating electroplating wastewater, preparation method and application of flocculating agent |
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Application publication date: 20140101 |