Technological system for urban domestic sewage treatment and synchronous sludge reduction near-zero emission
A sewage treatment and sludge technology, applied in the field of sludge synchronous reduction integrated process system, can solve the problems of high treatment cost, secondary environmental pollution, large sludge production, etc., achieve low cost, low infrastructure investment, and convenient transformation Effect
Inactive Publication Date: 2014-12-24
HUNAN YONKER ENVIRONMENTAL PROTECTION RES INST
View PDF5 Cites 14 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] Aiming at the problems that the existing urban domestic sewage activated sludge treatment system produces large amount of mud, high treatment cost and secondary environmental pollution, the present invention proposes a process system for urban domestic sewage treatment and sludge synchronous reduction. The present invention The technical solution is:
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0019] The mixed solution of sewage and treated residual sludge is introduced into the hydrolysis acidification tank, and the pollutants are converted into organic acids, and the hydraulic retention time is 2.0-2.5 h. In the anaerobic tank, the phosphorus-accumulating bacteria are enhanced to release phosphorus to obtain a high-concentration phosphorus-releasing solution, and the phosphorus-releasing time is 1.5-2.0 h. According to the concentration of phosphorus in the anaerobic phosphorus release liquid and the concentration of phosphorus in the effluent, determine the content of the phosphorus-rich solution entering the chemical phosphorus removal tank to ensure that the phosphorus content in the effluent reaches the standard; the sludge from the secondary sedimentation tank is also returned to the anaerobic tank to replenish the amount of sludge in the system , The reflux ratio is 50-150%. The aerobic nitrifying liquid in contact oxidation tank 3# is returned to the anoxi...
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
Login to View More Abstract
The invention relates to a technological system for urban domestic sewage treatment and synchronous sludge reduction. The sewage treatment adopts an integrated process of hydrolytic acidification, anaerobic phosphorus release, anoxic denitrification, aerobic decomposition, three-stage contact oxidation pool biological predation, and twice precipitation. Treatment of the residual sludge from a twice-precipitation pool adopts the process of anaerobic / anoxic cell lysis decomposition, aerobic microbial decomposition and two-stage aerobic microbial predation. The aerobic decomposition an ordinary activated sludge aeration tank, dispersed microorganisms degrade organic matters in wastewater in the pool and undergo self-metabolism. The three-stage contact oxidation pools are all internally equipped with a biological stuffing and a microporous aeration system. Protozoa, metazoan and large microorganisms respectively grow on the biological stuffings to form a biologic chain, matters and energy gradually decrease in a food chain transfer process, and in the sewage treatment process, sludge reduction is carried out simultaneously. The residual sludge is subjected to anaerobic / anoxic decomposition, microbial cells rupture, and a biological matrix is formed and enters aerobic decomposition. Aerobic sludge formed by metabolism enters a two-stage aerobic contact pool to realize reduction through microbial predation. And the remaining part flows to a hydrolysis acidification pool for treatment, thus realizing circulation of the whole wastewater treatment and sludge reduction.
Description
technical field [0001] The invention relates to urban domestic sewage treatment and sludge reduction, and is an integrated process system for synchronous sludge reduction in the sewage treatment process. Background technique [0002] The method of sludge reduction in sewage treatment can be divided into sludge reduction in the process of sewage treatment (also called in-situ sludge reduction) and sludge reduction after sewage treatment (post-reduction). There are three main types of in-situ sludge reduction technology, one is cell lysis-stealth growth sludge reduction technology, and the second is to increase the number of bacterial predators in the system and simulate the principle of food chain in the natural ecosystem. Reduction technology; the third category is the technology of adding chemical or biological methods to promote uncoupling metabolism, causing energy leakage and reducing biological growth efficiency, thereby reducing sludge volume. [0003] Cell lysis—ste...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F11/02
CPCY02W10/20
Inventor 肖羽堂蔡群欢
Owner HUNAN YONKER ENVIRONMENTAL PROTECTION RES INST