Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing chemical-biological mixing sludge adsorbent and recycling method thereof for sewage treatment,

A mixed sludge, chemical and biological technology, applied in the direction of adsorption water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of high cost of treatment, high cost of adsorbent, large dose of medicine, etc. problems, to achieve the effect of reducing processing costs, reducing dosage, and reducing consumption

Inactive Publication Date: 2011-11-23
HARBIN INST OF TECH
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of high cost of existing adsorbents, large amount of chemicals added in existing water treatment methods, large amount of sludge generated, and high cost of follow-up treatment, and provides a chemical-biological mixed sewage Preparation method of mud adsorbent and its reuse method for sewage treatment

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0010] Specific embodiment one: the preparation method of the chemical-biological mixed sludge adsorbent in this embodiment is carried out according to the following steps: one, urban sewage enters the mixing tank for chemically enhanced primary treatment, then adds chemical coagulant to the mixing tank, mixes The hydraulic retention time of the tank is 1-5min, and then enters the reaction tank for coagulation reaction for 10-30min to obtain the mud-water mixture, and the mud-water mixture enters the primary sedimentation tank for 10-120min to obtain chemical sludge, in which the chemical coagulant The amount of input is to add 5~500mg of chemical coagulant per liter of urban sewage; 2. After step 1, the effluent enters the bioreaction tank, and the hydraulic retention time of the bioreaction tank is 120~600min. The mud-water mixture enters the secondary sedimentation tank and stands still for 60-240 minutes to obtain biological sludge; 3. The chemical sludge obtained in step 1...

specific Embodiment approach 2

[0012] Embodiment 2: This embodiment is different from Embodiment 1 in that: the chemical coagulant in step 1 is iron salt, aluminum salt or polymerized iron-aluminum salt. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0013] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the iron salt is ferric chloride, ferric sulfate or ferrous sulfate. Other steps and parameters are the same as in the second embodiment.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for preparing chemical-biological mixing sludge adsorbent and a recycling method thereof for sewage treatment and relates to an adsorbent preparation method and a recycling method thereof for sewage treatment. The invention solves the problems that the cost of the traditional adsorbent is high; the traditional water treatment method has large medicine dosage, large amount of generated sludge and high cost of subsequent treatment. The preparation method comprises the following steps of: (1) preparing chemical sludge; (2) preparing biological sludge; (3) preparing the mixture A; (4) preparing the mixture B; (5) cleaning and drying, and thus, the chemical-biological mixing sludge adsorbent is prepared. The sewage treating method comprises the following steps of: discharging the city sewage into a mixing tank subject to chemical strengthening first-stage treatment, adding the chemical-biological mixing sludge adsorbent and a chemical coagulant into the mixing tank, discharging into a reaction tank, and carrying out biological treatment on the discharged water. The invention has the advantages of low preparation cost of adsorbent, little dosage of the added medicine, little amount of the generated sludge, and low cost of the subsequent sludge treatment.

Description

technical field [0001] The invention relates to a preparation method of an adsorbent and a method for recycling the adsorbent to sewage treatment. Background technique [0002] my country's urban sewage is a mixture of domestic sewage and industrial wastewater. The proportion of industrial wastewater accounts for 40%-60% or more. The rate of compliance with industrial wastewater treatment and discharge standards is low. The BOD / COD ratio of sewage is generally below 0.3. [0003] Most of the existing sewage treatment methods adopt chemical enhanced treatment and biological treatment. Chemical enhanced treatment can significantly remove various toxic and harmful pollutants in urban sewage by adding coagulant, such as SS, heavy metals, phosphorus, etc. The removal rate can reach more than 85-90%, and the removal rate of refractory organic matter can reach 80% above. It can be used as the pre-treatment of urban sewage treatment plants that mainly use secondary biological trea...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/06B01J20/08B01J20/30C02F9/14C02F1/28C02F1/52
Inventor 潘志辉田家宇李圭白
Owner HARBIN INST OF TECH