Deep dewatering method for sludge

A technology of deep dewatering and sludge dewatering, applied in the direction of dewatering/drying/concentrating sludge treatment, etc., can solve the problems of low utilization rate and restrict wide application, so as to improve dewatering performance, cheap and easy to obtain chemicals, and is conducive to the follow-up. effect of treatment
CN102408178AInactive Publication Date: 2012-04-11SHANGHAI MUNICIPAL ENG DESIGN INST GRP
4 Cites 40 Cited by

Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
Publication Date
2012-04-11
Estimated Expiration
Not applicable ยท inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The invention discloses a deep dewatering method for sludge, which is characterized by comprising the following steps of: a. adjusting the pH value of condensed sludge to 2.5-3.5 by using an acid; b. adding molysite and then adding H2O2 or a peroxyacetic acid into the condensed sludge, and then stirring the obtained mixture rapidly; c. adding a framework material into the obtained sludge, and adjusting the pH value of the sludge to 6.8-7.2; and d. carrying out dewatering on the obtained sludge. The method disclosed by the invention has the advantages that adopted medicaments are cheap and easy to obtain; and after adjustment, the sludge has a degree of stability, pathogenic bacteria are killed, and the stench of the sludge is removed at the same time, therefore, the method facilitates the follow-up treatment of sludge.
Need to check novelty before this filing date? Find Prior Art

Description

Technical field

[0001] The invention belongs to the technical field of sludge treatment, and is specifically a method for deep dehydration of sludge using advanced oxidation technologies such as fenton and fenton-like. Background technique

[0002] Sludge dewatering is the most common sludge treatment unit technology used in sewage plants in my country, and its application rate is almost 100%. Dewatering can not only reduce the amount of sludge drastically, but is also a necessary link for subsequent sludge treatment and disposal (landfilling, incineration, land use, etc.).

[0003] Sludge dewatering usually includes two steps: pretreatment and mechanical dewatering. At present, the most widely used pretreatment method in my country is flocculant single and double conditioning, single conditioning agent is polyacrylamide, and double conditioning is followed by polyaluminum salt or iron. Salt conditioning; belt filter press and centrifugal dehydration account for more than 90% of me...

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