Dephosphorization and denitrification, mud decrement and phosphorus recovery integrated sewage treatment device and method thereof

A sewage treatment device and a technology for sludge reduction, which are applied in the field of devices for biological treatment of sewage, can solve the problems that the incompatible contradiction between sludge reduction and biological phosphorus removal has not been well solved, and the removal effect is not ideal. Achieve the effect of improving the synchronous denitrification and phosphorus removal capacity of the system, reducing the output and reducing the pool capacity

Inactive Publication Date: 2009-09-30
CHONGQING UNIV
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Problems solved by technology

[0004] At present, there are many researches on the development and research of sludge reduction technology with good reduction effect at home and abroad, and in recent years, some researchers have gradually begun to pay attention to the most important negative problems brought about by sludge reduction-nitrogen, Phosphorus removal is not ideal, but the research and development technolo

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  • Dephosphorization and denitrification, mud decrement and phosphorus recovery integrated sewage treatment device and method thereof

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Example

[0033] Specific application example 1: Taking domestic sewage discharged from a campus of a university in Chongqing as the treatment object, the influent flow of the device is 20L / h, and the influent COD is 225-344mg / L, NH 3 -N 31-45mg / L, TN 37-56mg / L, TP 7-9mg / L, pH value 7-8, test temperature 20-24℃. The test results show that: when the anaerobic tank mixed liquid reflux hydrolysis acidification amount is 2% of the influent flow, the anaerobic phosphorus release concentration reaches about 55mg / L, and the anaerobic phosphorus-rich wastewater discharged for chemical phosphorus fixation is the treated water volume The phosphate content of the chemical sludge obtained is 73% (16% as P). The COD concentration of the effluent of the system cannot be detected, and nearly 100% is removed; the TP concentration of the effluent of the system is less than 0.5mg / L, and the average removal rate exceeds 93%; the NH of the system effluent 3 -N concentration is below 1mg / L, average removal rate...

Example

[0034] Specific application example 2: Taking domestic sewage discharged from a campus of a university in Chongqing as the treatment object, through the investment of NH 4 CI and K 2 HPO 4 Regulate NH 3 -N, TN and TP concentration. The inlet water flow rate of the device is 20L / h, and the inlet water COD, NH 3 -N, TN, TP concentration are 225-344mg / L, NH 3 -N 65-85mg / L, TN 65-85mg / L, TP 13-15mg / L, pH 7-8, test temperature 20-24℃. The test results show that: when the anaerobic tank mixed liquid reflux hydrolysis acidification amount is 4% of the influent flow, the VFA concentration after hydrolysis is above 350mg / L, the anaerobic release concentration is above 60mg / L, and the efflux is used for chemical phosphorus fixation. The amount of anaerobic phosphorus-rich wastewater is 15% of the treated water, and the phosphate content of the chemical sludge obtained is 83% (18% as P). The COD concentration of the effluent of the system cannot be detected, and nearly 100% is removed; the T...

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Abstract

The invention provides a dephosphorization and denitrification, mud decrement and phosphorus recovery integrated sewage treatment device and a method thereof. The method adopts processes of hydrolysis acidification, multilevel series contact aeration and dephosphorization and denitrification A<2>/O of continuous flow, and comprises the following steps that: a hydrolysis acidification unit is used to treat raw sewage and a little anaerobic phosphorus releasing sludge to realize conversion of VFA; clear solution rich in the VFA after hydrolyzed supplies rich carbon sources for a subsequent dephosphorization and denitrification A<2>/O unit to reinforce synchronous dephosphorization and denitrification; and low concentration phosphorus in the sewage is enriched in the anaerobic phosphorus releasing sewage by the excessive phosphorus absorption capability of a phosphate accumulating organism, and the minor part of phosphorus enriched sewage is drained to carry out chemical phosphorus solidification. The dephosphorization mode can significantly reduce sewage quantity of chemical dephosphorization, improve the utility ratio of a dephosphorizing medicament, reduce dosage of the medicament, has high phosphorous amount in the obtained chemical sludge, and realizes recycle of the middle and low concentration phosphorus in urban sewage by the mode of non residue sludge under a condition of low cost. Sludge decrement can be realized through biofacies separation of a multilevel series contact aeration tank and the function of microorganism predation grade by grade.

Description

technical field [0001] The invention relates to a device and method for biologically treating sewage, in particular to a sewage treatment technology integrating phosphorus and nitrogen removal, sludge reduction and phosphorus enrichment and recovery. Background technique [0002] With the growth of urban sewage production and the improvement of treatment rate, the amount of residual sludge as a by-product of sewage treatment is also increasing rapidly. Faced with the continuous generation of sludge, the traditional end-of-sludge treatment and disposal methods have been questioned in terms of technology, economy, and environmental safety. It is against this background that the sludge source reduction technology came into being. . But so far, all kinds of sludge reduction technologies developed at home and abroad have shortcomings, the most difficult of which is that the effect of sludge reduction is good, the amount of excess sludge produced is small, and the amount of nitro...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/30C02F1/52
Inventor 吉芳英左宁袁云松黄力彦
Owner CHONGQING UNIV
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