Resource utilization method of urban sludge
A technology of urban sludge recycling, applied in the field of urban sludge resource utilization, can solve the problems of high moisture content in sludge, achieve good fermentation effect, improve fermentation efficiency, and strong vitality
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0018] The method for resource utilization of urban sludge comprises the following steps in sequence:
[0019] 1) Add the sludge into the mixing tank. Usually, the moisture content of the selected sludge is preferably 80±5%. Add a certain proportion of clear water to dilute the sludge, so that the moisture content of the sludge can reach more than 90%, and it should not be diluted too much. Generally, the upper limit of the moisture content reaches 93%. Then, add agent A and mix thoroughly. Agent A is compounded by polymer flocculant and inorganic salt. In this embodiment, polymer flocculant adopts polyferric sulfate, and inorganic salt adopts compound minerals such as calcium oxide, magnesium oxide, and the weight ratio of polymer flocculant and inorganic salt is 1:5, and its preparation method is: polysulfuric acid The medicine A can be prepared by mixing and drying iron and inorganic salt oxygen. Experiments have proved that after adding agent A, heavy metals can be bett...
Embodiment 2
[0024] Hereinafter, on the basis of Embodiment 1, a more specific embodiment will be used for further description.
[0025] Take the original sludge with a moisture content of 85%, put it into the mud pool with an excavator, add water to dilute it to a moisture content of more than 90%, and add 1‰ of the total weight of the sludge. Fully mixed for 20 minutes, sent to the integrated belt filter press, and filtered to make the water content 77.5%. Spread the sludge to a thickness of 10 cm, and dry it naturally for 3 days to obtain a loose sludge cake with a moisture content of 60%.
[0026] Take 100kg of loose sludge cake with a moisture content of 60%, add 500g of α-bacillus, 20kg of wheat straw, and 100g of urea, mix well, stack and have a thickness of 100mm, and cover with plastic cloth. Continue to ferment for 3 days, the center temperature reaches 65°C, turn over the pile, and ferment for another 7 days, keep the temperature at 50°C, turn over the pile for the second time,...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com