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

Method and system for using sludge to realize energy saving and reduction for sewage treatment plants

A sewage treatment plant and sludge technology, which is applied in the fields of sewage/sludge fertilizer, water/sludge/sewage treatment, sludge treatment, etc. problems, to achieve the effect of reducing sludge disposal costs, reducing investment and operation costs, and avoiding large floor space

Active Publication Date: 2015-05-13
SICHUAN STONG EURO & AMERICA ENVIRONMENT ENG
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is a thick substance between liquid and solid, it can be transported by pump, the settling time is particularly long, the pond covers a large area, and the separation effect is not good. In the operation of the existing sewage plant, the investment and operation of sludge disposal The cost is huge, and can even account for 50% of the investment and operation costs. A large amount of organic matter in the sludge contains huge energy. How to further excavate the energy in the sludge and at the same time avoid the secondary harm of the toxic and harmful substances in the sludge to the environment
There are many problems in sludge incineration technology. The core problems are large investment, high treatment cost, highly toxic substances such as dioxins produced by the combustion of organic matter, waste of nutrients and sludge energy required for plant growth such as nitrogen and phosphorus in sludge, and landfill The investment ratio of composting, composting and incineration is generally 1:1.5:3, and landfill takes up a lot of land

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 and system for using sludge to realize energy saving and reduction for sewage treatment plants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 As shown, the sewage treatment plant uses sludge to achieve energy saving and reduction system, including aeration tank, concentration tank, fermentation tank, biogas purifier, biogas generator and dryer connected in sequence, and the biogas generator is connected with the aeration tank at the same time It is connected with the fermentation tank; the concentration tank is connected with a sedimentation tank and a deodorization device at the same time, and a filter press is arranged between the concentration tank and the fermentation tank, and the filter press is connected with the concentration tank and the fermentation tank at the same time. The deodorization device is used to remove the odor in the upper part of the thickening tank, so that the impact of the sludge odor on the operator can be minimized during operation.

[0026] A gas storage tank is arranged between the fermentation tank and the biogas purifier, and the gas storage tank is arranged o...

Embodiment 2

[0045] In summer, after the sludge is fully aerated in the aeration tank for 2 days, it is concentrated in the thickening tank and filtered by the filter press, and the volume is 100 m 3 (Generally it is hauled after pressing and filtering, so the volume at this time is 100%) sludge, in which the water content of the sludge is 80%, after 32 days of fermentation in the fermentation tank, the remaining sludge in the fermentation tank Measure its volume and moisture content after drying in a dryer, as shown in the table below:

[0046] original after drying Volume (m 3 ) 100 11 Moisture content (percentage) 80% 38%

[0047] Calculated from the above table 1, the sludge fermentation consumption rate is 65.9%, and the sludge volume obtained after the sludge is filtered by the filter press in this experiment is 19 m 3 , fermented in the fermentation tank to produce biogas, the volume of biogas and power generation rate are obtained, which are refle...

Embodiment 3

[0051] In summer, after the sludge is fully aerated in the aeration tank for 2 days, it is concentrated in the thickening tank and filtered by the filter press, and the volume is 100 m 3 (Generally it is hauled after pressing and filtering, so the volume at this time is 100%) sludge, in which the water content of the sludge is 80%, after 27 days of fermentation in the fermentation tank, the remaining sludge in the fermentation tank Measure its volume and moisture content after drying in a dryer, as shown in the table below:

[0052] original after drying Volume (m 3 ) 100 15 Moisture content (percentage) 80% 45%

[0053] Calculated from the above table 1, the sludge fermentation consumption rate is 58.88%, and the sludge volume obtained after the sludge is filtered by the filter press in this experiment is 27 m 3 , fermented in the fermentation tank to produce biogas, the volume of biogas and power generation rate are obtained, which are refl...

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 system for using sludge to realize energy saving and reduction for sewage treatment plants. The system comprises an aeration tank, a concentration tank, a fermentation tank, a biogas purifier, a biogas power generator and a drying machine in sequential connection. The biogas power generator is simultaneously communicated with the aeration tank and the fermentation tank, and a filter press is arranged between the concentration tank and the fermentation tank. After sludge in the aeration tank is aerated, residual sludge and precipitated sludge in a precipitation tank are discharged into the concentration tank for concentration, the concentrated sludge is subjected to filter pressing by the filter press, the sludge subjected to filter pressing is pushed into the fermentation tank for fermentation, and biogas generated in the fermentation tank is treated by the biogas purifier and a compression supercharger and then conveyed to the biogas power generator for power generation. Using the system and the method reduces operating cost for the sewage treatment plants, secondary pollution is avoided, sludge resource is effectively used, and consumption of sludge treatment investment is reduced. Further, the system meets the requirements on reduction, recycling and harmless in sludge treatment.

Description

technical field [0001] The invention relates to a system for realizing energy saving and shrinkage reduction by utilizing sludge in a sewage treatment plant and a shrinkage reducing method thereof, belonging to the field of energy saving and environmental protection. Background technique [0002] Sewage, usually refers to waste water from domestic and production that is polluted to a certain extent. Sewage mainly includes domestic sewage and industrial wastewater. The main pollutants of sewage are pathogen pollutants, oxygen-consuming pollutants, plant nutrients, toxic pollutants, etc. Sludge is the product of sewage treatment, which is composed of organic debris, bacterial cells, inorganic particles, colloids, etc. extremely complex heterogeneous bodies. The main characteristics of sludge are high water content (up to 99%), high content of organic matter, easy to rot and smell, and the particles are finer, the specific gravity is smaller, and it is in a colloidal liquid s...

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): C02F11/00C02F11/12C02F11/04C10L3/10C05F7/00B09B3/00F02B43/10
CPCY02A40/20Y02E50/30Y02T10/30Y02W10/20Y02W30/40
Inventor 李华胡登燕郑传勇黄银忠
Owner SICHUAN STONG EURO & AMERICA ENVIRONMENT ENG