Method for treating sludge and deodorizing method

A technology for sludge and wastewater treatment, which is applied in the field of sludge treatment and low-energy sludge treatment, and can solve the problems of biological filter clogging and difficult operation and management.

Active Publication Date: 2022-07-01
THE HONG KONG UNIV OF SCI & TECH
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the biological treatment method is economically feasible, it will inevitably produce secondary pollutants, which require final treatment and disposal
In addition, H 2 The sulfur element oxidized by S often leads to the clogging of biofilters, resulting in difficulties in operation and management

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for treating sludge and deodorizing method
  • Method for treating sludge and deodorizing method
  • Method for treating sludge and deodorizing method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0093] Example 1: Using CEPT sludge from Stonecutters Island Sewage Treatment Works in Hong Kong

[0094] Collect CEPT sludge (eg. figure 1 shown). The MLSS of the sludge was 25 g / L.

[0095] The CEPT sludge was added to the plexiglass electrolytic cell, and a carbon fiber brush electrode (fiber diameter 5-7μm, length 5cm; cylindrical brush body diameter 10cm, length 15cm, specific surface area 8000m) was used. 2 / m 3 ), treated the sludge for 5, 10 and 15 minutes at a voltage of 10V under the conditions of normal temperature and pressure.

[0096] Untreated 90 ml CEPT sludge and treated CEPT sludge were collected and transferred to 125 ml serum bottles for malodour analysis. During the experiment, serum bottles were stored at a constant temperature of 38°C with agitation of 750rpm. The result is as figure 2 and image 3 shown.

[0097] The sludge moisture content, capillary suction time (CST), and sludge specific resistance (SRF) were investigated to evaluate the slu...

example 2- example 8

[0100] Example 2-Example 8 were basically carried out according to the method of Example 1, except that the electrochemical treatment conditions and the type of odor source were changed according to Table 1 below. The sludge dewatering rate and hydrogen sulfide removal rate were then evaluated according to the method of Example 1.

[0101] Table 1

[0102]

[0103]

[0104]

[0105] In short, the method does not need to add chemicals, and does not generate secondary pollutants. This method can simultaneously control the sludge H 2 The production of S, and the improvement of sludge dewaterability. The electrochemical treatment adopted in this method can realize the efficient deodorization of sludge (99% H 2 S removal rate) and dehydration (88%). The traditional sludge treatment process improves sludge dewaterability and odor control by adding different methods such as flocculants and oxidants, resulting in higher treatment costs, tedious operation and maintenance a...

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

PropertyMeasurementUnit
diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to a method for treating sludge, a method for simultaneously deodorizing sludge and improving dewatering effect, and a method for deodorizing. The method for treating sludge includes: providing first sludge generated by wastewater treatment, and applying a voltage of 5-15V and 10mA / cm 2 ~80mA / cm 2 Electrochemical treatment of the first sludge is performed to obtain a treated second sludge. The method of the present invention can deodorize various materials (including sludge) under the condition of low energy consumption, and can simultaneously improve the (sludge) dewatering effect.

Description

technical field [0001] The invention relates to the field of environmental protection engineering, in particular to a method for treating sludge with low energy consumption, a method for deodorizing sludge and improving dewatering effect at the same time, and a deodorizing method. In particular, the present invention particularly relates to the treatment of sludge, especially sludge produced by chemically enhanced primary wastewater treatment (CEPT), without the addition of any chemicals or chemical agents. [0002] The method of the present invention can deodorize various materials (including sludge) with low energy consumption, and can provide dewatering effect at the same time. Background technique [0003] A series of deodorization (removal of sulfide, such as H 2 The method of S) has been studied and developed. Conventional methods mainly involve chemical oxidation and chemical precipitation. For example, by adding hypochlorite and iron salt, but hypochlorite cannot ...

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): C02F11/00C02F11/15C02F101/10
CPCC02F11/006C02F11/15C02F2101/101C02F2303/02C02F2301/08
Inventor 曾谦郝天伟薛蔚琦陈光浩
Owner THE HONG KONG UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap