Culture method of sulfur synergy denitrification simultaneous nitrogen and phosphorous removal granular sludge

A simultaneous denitrification, dephosphorization, and granular sludge technology, applied in chemical instruments and methods, water/sludge/sewage treatment, anaerobic digestion, etc., can solve problems such as insufficient phosphorus removal and reduction of excess sludge, and achieve The effect of shortening the processing time, good settling performance and stable performance

Active Publication Date: 2014-10-15
SUN YAT SEN UNIV
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Problems solved by technology

However, the development and utilization of seawater in coastal areas has led to the generation of a large amount of saline wastewater. Therefore, a saline wastewater treatment process has emerged as the times require. The integrated process of sulfate reduction, denitrification and nitrification (referred to as process), this process can effectively reduce the output of excess sludge, and has obvious effects on the removal of organic matter and nitrogen, but it is slightly insufficient in phosphorus removal

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  • Culture method of sulfur synergy denitrification simultaneous nitrogen and phosphorous removal granular sludge
  • Culture method of sulfur synergy denitrification simultaneous nitrogen and phosphorous removal granular sludge

Examples

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Embodiment 1

[0045] Example 1 Cultivation of sulfur synergistic denitrification synchronous denitrification and phosphorus removal granular sludge

[0046] ①Add 10L of mud-water mixture of anaerobic activated sludge (collected from Hong Kong Sha Tin Sewage Treatment Plant) with an initial sludge concentration of 5.98g SS / L to a batch-type activated sludge reactor (reaction volume 10L), and settle to remove the upper After clear liquid 5L, enter 5L synthetic waste water (its component content is shown in Table 1) and carry out sludge domestication, improve its microbial activity simultaneously with the environment that domesticated microorganisms adapt to the presence of phosphate; Described synthetic waste water contains carbon source, sulfur source As well as the phosphorus source, the carbon source is provided by sodium acetate; the initial concentration of acetate in the synthetic wastewater is 150mg C / L; the sulfur source is provided by sodium sulfate, and the initial concentration of s...

Embodiment 2

[0049] (1) Sludge domestication stage: add the sulfur synergistic denitrification, denitrification and phosphorus removal inoculation sludge prepared in Example 1 to the batch activated sludge reactor (SBR, reaction volume 1.4L), wherein the inoculation sludge concentration It is 9.45g SS / L, and the dosage is 1.4L. After adding it into the reactor, it precipitates to remove 0.7L of the supernatant, and then feeds 0.7L of water into the reactor containing carbon source, sulfur source, phosphorus source, calcium The synthetic wastewater of ions and magnesium ions begins the anaerobic phosphorus release stage, the carbon source is provided by sodium acetate, the sulfur source is provided by sodium sulfate, and the phosphorus source is provided by dipotassium hydrogen phosphate and potassium dihydrogen phosphate, which are The initial concentration in the waste water is respectively 150mgC / L, 200mgS / L, 20mgP / L, and described calcium ion, magnesium ion are provided by calcium chlori...

Embodiment 3

[0058] (1) Sludge domestication stage: add the sulfur synergistic denitrification denitrification and dephosphorization seeding sludge prepared in Example 1 to the reactor, the sludge concentration is 9.00mg SS / L, and the synthetic wastewater (Table 1) is used as Enter water, start the reactor to start the anaerobic phosphorus release stage; when the carbon source concentration drops to zero, add potassium nitrate 20mg N / L (final concentration in the reactor) as a nitrogen source, and the reactor enters the anoxic phosphorus uptake stage; The operating conditions are: stirring speed 150rpm, temperature 20-25°C, influent pH=7, hydraulic retention time 16h; when the average particle size of sludge particles is 50μm, the removal rate of acetate reaches 100%, and the removal rate of nitrate up to 90%, the removal rate of phosphate reaches 30%, SVI 5 50mL / g, SVI 30 30mL / g, the domestication stage is over;

[0059] (2) Granular sludge growth stage: After the domestication stage, t...

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Abstract

The invention belongs to the technical field of biological treatment of wastewater and particularly relates to a culture method of sulfur synergy denitrification simultaneous nitrogen and phosphorous removal granular sludge. The culture method of the sulfur synergy denitrification simultaneous nitrogen and phosphorous removal granular sludge is divided into three stages as follows: a sludge acclimation stage, a granular sludge growth stage and a granular sludge mature stage. According to the culture method, mechanical stirring is adopted, the stirring speed is controlled, and activated sludge is evenly distributed, so that the formed granular sludge is stable in performance, good in impact resistance and high in adaptability to external environment change, organic matters, nitrogen and phosphorus are effectively removed in one reactor, and sulfate radicals are involved in the whole process to play a synergistic role.

Description

technical field [0001] The invention belongs to the technical field of wastewater biological treatment, and in particular relates to a method for cultivating granular sludge with synchronous denitrification and phosphorus removal through sulfur synergistic denitrification. Background technique [0002] In the 21st century, human beings are facing some serious global problems, among which the water quality and quantity problems are particularly prominent. Removing nutrients through various wastewater treatment processes to alleviate water eutrophication is a measure that all regions have to take. The most commonly used is the enhanced biological phosphorus removal process, which uses nitrate as the electron acceptor in the second stage to achieve the effect of simultaneous nitrogen and phosphorus removal. However, the development and utilization of seawater in coastal areas has led to the generation of a large amount of saline wastewater. Therefore, a saline wastewater treat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F3/28
Inventor 吕慧陈光浩
Owner SUN YAT SEN UNIV
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