Method for quick resource utilization of excess sludge in domestic sewage plants

A technology for domestic sewage and excess sludge, applied in the field of waste resource utilization, can solve the problems of lack of mature experience and low sludge treatment efficiency.

Inactive Publication Date: 2010-07-21
FUDAN UNIV
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] my country's sludge disposal is still in its infancy, lacks mature experience, and the efficiency of sludge treatment is low

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 quick resource utilization of excess sludge in domestic sewage plants
  • Method for quick resource utilization of excess sludge in domestic sewage plants
  • Method for quick resource utilization of excess sludge in domestic sewage plants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The remaining dry sludge from Shanghai Quyang Sewage Plant was mixed with ordinary soil in different proportions by mass, and then planted with philodendron sellooum. The initial weight of each barrel is 4kg. According to the mass percentage of the dry sludge retrieved from the sewage plant to the total soil, it is divided into 3 steps, and the sludge accounts for 25%, 50%, and 100% of the total soil mass respectively. Set 3 parallel samples for each step, and set 3 blank controls at the same time, that is, 100% common soil, for comparison between groups and within groups.

[0025] The planting period was from April 13 to May 30, 2008. During the whole process, the plants are only watered regularly, no fertilizer is applied, and no nutrients are added. Compare the gross weight and chlorophyll content of the plants before and after planting, evaluate the growth of the plants, and find out the most suitable sludge concentration for the growth of spring feathers.

[002...

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 belongs to the field of resource utilization of waste materials, and discloses a method for quick resource utilization of excess dry sludge in domestic sewage plants. In the invention, the excess dry sludge in sewage plants is mixed with common soil or commercial nutritional soil in a certain mass ratio, and the mixture is used as the potting soil for growing Philodendron selloum. Since the water content of the dry sludge is still very high (about 80%), the plant does not need watering in the first 15-20 days, and afterwards, the plant is watered once or twice a week. The plant can be sold in a potted way after adapting to the growing environment (about 45-60 days). The invention provides a method for changing wastes into treasures to solve the ubiquitous problems in sewage plants in China.

Description

technical field [0001] The invention belongs to the field of resource utilization of waste, in particular to a method for rapid resource utilization of residual dry sludge from domestic sewage plants. Background technique [0002] According to reports, as of the end of March 2008, my country's sewage treatment plants have reached more than 1,300, with a total treatment capacity of 80 million cubic meters per day. Numerous sewage treatment plants have played an important role in solving the problem of water pollution in our country, and alleviated this crisis to a large extent. However, the sludge produced in sewage treatment has become a new environmental problem. Thousands of tons of sludge are produced every year, causing serious secondary pollution to the environment. At the same time, domestic investment in sludge treatment only accounts for 20% to 50% of the total investment in sewage treatment plants, and the sludge treatment process of urban sewage treatment plants ...

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 & AuthorityApplications(China)
IPC IPC(8): C05F7/00A01G31/00
CPCY02A40/20
Inventor王寿兵阮晓峰
OwnerFUDAN UNIV