Method for preparing granular ammonia oxidative mud with anaerobic bacteria from mixed mud

A technology of anaerobic granular sludge and anaerobic ammonia oxidation, which is applied in anaerobic digestion treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., and can solve the problems of low volume load of reactor and low removal rate, etc. , to achieve the effect of improving removal efficiency and operating stability

Inactive Publication Date: 2005-02-23
TSINGHUA UNIV
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  • Summary
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of low reactor volume load and low removal rate due to low sludge concentration in the existing anaerobic ammonium oxidation reactor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The anaerobic granular sludge in a UASB reactor that treats brewery wastewater and the aerobic activated sludge in a CASS tank that treats domestic sewage are mixed evenly in a ratio of 1:1. Then inoculate the mixed mud into the upflow anaerobic reactor, the total volume of the reactor is 3.05L, wherein the volume of the reaction zone is 1.60L, the precipitation zone is 1.04L, and the precipitation zone is equipped with a three-phase separator. After the inoculation, the reactor The sludge concentration in it was 13.2g SS / L. The concentration of ammonia nitrogen in the simulated wastewater is 200-600 mg / L, and the ratio of ammonia nitrogen to nitrite nitrogen is 0.7. In addition, KH 2 PO 4 , trace elements and yeast extract, the concentrations are 0.05gP / L, 0.001g Zn / L, 0.0005g Co / L, 0.002g Mn / L, 0.0008g Cu / L, 0.0012g Mo / L, 0.003g Ca / L, 0.002g Fe / L and 0.05g yeast extract / L, the simulated wastewater does not contain organic carbon sources. The operating conditions o...

Embodiment 2

[0019] The anaerobic granular sludge in an EGSB reactor for treating starch wastewater and the aerobic activated sludge in an aeration tank for domestic sewage are mixed evenly in a ratio of 10:1. The rest of the operation process is the same as that of Example 1, and anaerobic ammonium oxidation granular sludge appears in the reactor after about 320 days of continuous cultivation.

Embodiment 3

[0021] Using the same inoculated sludge as in Example 1, KH 2 PO 4 , trace elements and yeast extract concentrations are 0.01g P / L, 0.001g Co / L, 0.003g Mn / L, 0.002g Mo / L, 0.002g Ca / L, 0.003g Fe / L and 0.01g yeast extract Paste / L. The rest of the operation process is the same as that of Example 1, and anaerobic ammonium oxidation granular sludge appears in the reactor after about 280 days of continuous cultivation.

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Abstract

A process for using sludge mixture to culture the granular sludge used for anaerobic ammoxidation reactor includes such steps as mixing the granular anaerobic sludge with active aerobic sludge, loading the mixture in flow-up anaerobic reactor, preparing simulative sewage, pumping it in said reactor from its bottom, and running for a certain time while controlling the flow speed, temp and pH value.

Description

technical field [0001] The invention relates to a method for cultivating anaerobic ammonium oxidation granular sludge by using mixed sludge, and belongs to the technical field of wastewater biological treatment. Background technique [0002] With the intensification of nitrogen pollution and the enhancement of people's awareness of environmental protection, wastewater biological denitrification technology has attracted widespread attention from all over the world and has become an important research direction for water pollution control. The basic principle of traditional biological denitrification is to oxidize ammonia nitrogen to nitrate through nitrification reaction under aerobic conditions, and then reduce nitrate to gaseous nitrogen through anoxic denitrification reaction with the participation of organic matter to escape from the water. In this process, the nitrogen conversion path is very long, resulting in excessive power consumption of the traditional biological de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F3/28
CPCY02W10/10
Inventor 左剑恶杨洋沈平顾夏声
Owner TSINGHUA UNIV
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