Device and method for inducing struvite precipitate formation by utilizing modified diatomite

Abstract

The invention relates to a device and a method for inducing struvite precipitate formation by using modified diatomite. According to the technical scheme, the device comprises a water inlet pipeline,an anaerobic tank, an anaerobic tank supernatant water outlet pipeline, a pipeline mixer, a pH regulator and magnesium source adding tank, a modified diatomite adding tank, a pH online monitor, a struvite reactor, a precipitate filtering layer, a partition plate, a flow guide plate and a water outlet pipe, wherein an anaerobic reactor and the struvite reactor are connected through the water inletpipeline and a reflux pipeline, the pipeline mixer is arranged on the water inlet pipe of the struvite reactor so as to completely mix a pH regulator, a magnesium source and influent, an agent addingtank is embedded in the upper portion of the pipeline mixer in a pipeline connection manner, the struvite reactor divides the interior of the reactor into an S shape by adopting the partition plate and the flow guide plate, the partition plate is suspended to keep the interior of the reactor communicated, the pH online monitor is arranged, the struvite reactor is provided with a filter layer and the partition plate, and the partition plate can be opened at regular time and is used for solid-liquid separation and reco of a mixture of diatomite and precipitate after a reaction.

Description

technical field

[0001] The invention relates to a device and method for using modified diatomite to induce the formation of struvite precipitation, which is suitable for advanced treatment of nitrogen and phosphorus wastewater. Background technique

[0002] At present, most of the more common struvite reactors are complex in structure, difficult to operate, high in operating costs, and consume a lot of manpower and power resources, and the existing single struvite reactors are mostly used to treat wastewater with high nitrogen and phosphorus concentrations. For domestic wastewater with low phosphorus concentration, the cost of dosing chemicals is higher than the economic value created by struvite recovery, so it is difficult to apply it in domestic sewage treatment plants. The recovery of nitrogen and phosphorus by struvite precipitation can not only realize the reuse of phosphorus resources, but also reduce the loss of phosphorus resources and the mining of phosphorus ore, ...

Examples

Embodiment Construction

[0013] The first part is a simple anaerobic tank reactor. After the remaining sludge enters from the bottom water inlet pipe (1), an anaerobic environment is formed in the anaerobic tank (2) for anaerobic digestion, thereby releasing the mud-water mixture Phosphorus in the supernatant increases the concentration of nitrogen and phosphorus. The supernatant liquid from the anaerobic tank enters the struvite reactor (10) through the outlet pipe (3) and the pipe mixer (5). The upper part of the pipe mixer is equipped with a pH regulator and a magnesium source dosing tank (4). The second part is the struvite reactor (8), and the upper part is equipped with a modified diatomite dosing tank (6) and a pH online monitor (7) for real-time monitoring of the pH value. The middle part is a struvite reactor separated by a sedimentation filter layer (9) and a filter partition (11). After regular dosing of chemicals and modified diatomite, the influent water enters the tank with the pipeline ...

technical field

[0001] The invention relates to a device and method for using modified diatomite to induce the formation of struvite precipitation, which is suitable for advanced treatment of nitrogen and phosphorus wastewater. Background technique

[0002] At present, most of the more common struvite reactors are complex in structure, difficult to operate, high in operating costs, and consume a lot of manpower and power resources, and the existing single struvite reactors are mostly used to treat wastewater with high nitrogen and phosphorus concentrations. For domestic wastewater with low phosphorus concentration, the cost of dosing chemicals is higher than the economic value created by struvite recovery, so it is difficult to apply it in domestic sewage treatment plants. The recovery of nitrogen and phosphorus by struvite precipitation can not only realize the reuse of phosphorus resources, but also reduce the loss of phosphorus resources and the mining of phosphorus ore, ...

Examples

Embodiment Construction

[0013] The first part is a simple anaerobic tank reactor. After the remaining sludge enters from the bottom water inlet pipe (1), an anaerobic environment is formed in the anaerobic tank (2) for anaerobic digestion, thereby releasing the mud-water mixture Phosphorus in the supernatant increases the concentration of nitrogen and phosphorus. The supernatant liquid from the anaerobic tank enters the struvite reactor (10) through the outlet pipe (3) and the pipe mixer (5). The upper part of the pipe mixer is equipped with a pH regulator and a magnesium source dosing tank (4). The second part is the struvite reactor (8), and the upper part is equipped with a modified diatomite dosing tank (6) and a pH online monitor (7) for real-time monitoring of the pH value. The middle part is a struvite reactor separated by a sedimentation filter layer (9) and a filter partition (11). After regular dosing of chemicals and modified diatomite, the influent water enters the tank with the pipeline ...

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