A method for step-by-step recovery of intracellular and extracellular polymers in excess sludge

A technology of excess sludge and macromolecule, applied in plastic recycling, sludge treatment, recycling technology, etc., can solve the problems of unseen step-by-step recycling, and achieve the effect of obvious reduction effect and expansion of resource utilization.

Active Publication Date: 2022-05-17
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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  • Description
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Problems solved by technology

[0004] However, the traditional method only recovers a single polymer substance in the extracellular or intracellular, or simultaneously extracts and recovers the possible intracellular and extracellular polymer substances
So far, there is no research report on the step-by-step recovery of intracellular and extracellular polymeric substances in excess sludge

Method used

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  • A method for step-by-step recovery of intracellular and extracellular polymers in excess sludge
  • A method for step-by-step recovery of intracellular and extracellular polymers in excess sludge
  • A method for step-by-step recovery of intracellular and extracellular polymers in excess sludge

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Embodiment Construction

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments.

[0028] Such as Figure 1 to Figure 3 Shown: the method for step-by-step recovery of intracellular and extracellular macromolecules in the excess sludge provided by the embodiment of the present invention comprises the following steps:

[0029] Step S1: collection of activated sludge, the activated sludge includes one or more of ordinary activated sludge, aerobic granular sludge or anaerobic granular sludge;

[0030] Step S2: Preliminary treatment of activated sludge, adding cation exchange resin to the activated sludge treated by the thickening dev...

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Abstract

The invention relates to a step-by-step recovery method for intracellular and extracellular polymers in excess sludge, comprising the following steps: step S1: collection of activated sludge; step S2: preliminary treatment of activated sludge; step S3: extracellular Recovery of high molecular polymer; step S4: separation of cation exchange resin; step S5: secondary treatment of activated sludge; step S6: recovery of intracellular high molecular polymer. The present invention can recover the intracellular and extracellular polymers in the excess sludge to the greatest extent, and the total extraction amount of intracellular and extracellular polymers is high; at the same time, the extracted intracellular and extracellular high molecular polymers are not affected Molecular polymers produce chemical pollution, achieve the dual effects of environmental protection and resource recovery, and can also make the reduction effect of activated sludge obvious; intracellular and extracellular polymers are biopolymers, using their respective characteristics, can be used as Adsorbents, soil improvers, biological flocculants, thickeners, etc., expand the way of recycling municipal activated sludge.

Description

technical field [0001] The invention relates to the field of waste water treatment and resource utilization, in particular to a method for stepwise recovery of intracellular and extracellular macromolecules in excess sludge. Background technique [0002] Sewage treatment plants produce a large amount of excess sludge, and its treatment and disposal is an urgent problem to be solved, and resource utilization is an inevitable direction for the future development of sewage treatment. Sludge treatment and disposal methods are mainly landfill, sludge composting, dry incineration, resource recovery, etc. Among all the disposal methods, only resource utilization can be solved from the source. Sludge resource utilization can realize sludge reduction and reduce the burden of subsequent treatment of excess sludge. In recent years, the recovery of polymer substances from excess sludge has become a hot research direction, mainly because polymer substances have extremely high added valu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J11/06C08B37/04C08G63/89C02F11/00C02F1/36C08L5/04C08L67/04
CPCC08J11/06C08B37/0084C08B37/0003C08G63/89C02F11/00C02F1/36C02F2305/04C08J2305/04C08J2367/04Y02W30/62
Inventor 曹达啟韩佳霖田锋孙秀珍郝晓地
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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