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Residual sludge treatment system for urban sewage treatment plant

A technology of excess sludge and treatment system, which is applied in the direction of sludge treatment, sludge treatment, oxidation treatment sludge, etc., can solve the problem of no nitrogen and phosphorus recovery, and achieve the effect of reducing the difficulty of cracking

Active Publication Date: 2021-10-22
江苏御镐智能制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it has carried out lysis and aerobic treatment on the sludge to recover nitrogen and phosphorus, it has not fully recovered the nitrogen and phosphorus in the remaining sludge

Method used

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  • Residual sludge treatment system for urban sewage treatment plant
  • Residual sludge treatment system for urban sewage treatment plant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Using excess sludge from a sewage treatment plant, the phosphorus content is 4.6% of the dry weight of the sludge, the nitrogen is 9.1%, and the moisture content is 98%;

[0045] The remaining sludge is transported to the acidification tank, and when the pH of the mixture in the acidification tank is between 4-5, the mixture is transported to the cracking tank for cracking. The cracking tank adopts ultrasonic cavitation cracking method, and the frequency range of ultrasonic waves is in 56kHz, the sound energy density is 1.0W / mL, and the action time is 10min. At the same time, hydrogen peroxide is added to the mixture, and the dosage of hydrogen peroxide is 2% of the mass of the mixture;

[0046] The cracked mud is sent to the plate-and-frame filter for dehydration treatment, the clear liquid of the plate-and-frame filter is sent to the ammoniation tank, the effluent from the ammoniation tank is sent to the zeolite tank, the effluent from the zeolite tank is sent to the d...

Embodiment 2

[0048] On the basis of Example 1, the mud cake produced by the plate and frame filter is transported to the incinerator to prepare carbon slag, and the carbon slag is transported to the crystallization tank to settle together with the struvite, finally forming a carbon slag-based fertilizer, wherein, The nitrogen recovery rate is 61%, and the phosphorus recovery rate is 67%.

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Abstract

The invention relates to a residual sludge treatment system for an urban sewage treatment plant. The system sequentially comprises an acidification pool, a cracking pool, a mud-water separation device, an ammonification pool, a zeolite pool, a regeneration pool, a mixing pool and a crystallization pool. The acidification pool is provided with a residual sludge inlet, and the sludge cracked by the crackingpoolis conveyed to the mud-water separation device. The mud-water separation device is provided with a clear liquid outlet, the clear liquid outlet is communicated with the ammoniation pool, effluent of the ammoniation pool is conveyed to the zeolite pool, and after zeolite in the zeolite pool is saturated, the saturated zeolite is conveyed to the regeneration pool for regeneration. Water generated by the regeneration pool is conveyed to the mixing pool, the zeolite pool is provided with a water outlet, and the water outlet is connected with a dephosphorization pool. The dephosphorization pool is communicated with the mixing pool, the mixing pool is connected with the crystallization pool, and crystals are discharged after being generated in the crystallization pool.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a system for treating excess sludge of an urban sewage treatment plant. Background technique [0002] Sewage activated sludge treatment method is the process of using microorganisms to metabolize organic pollutants in wastewater / sewage, transforming organic matter into itself or degrading organic matter into small molecule organic matter or even carbon dioxide, methane and / or water, and transforming organic matter into its own substances In order to prevent the excess of microorganisms in the sewage treatment process from affecting the treatment effect, the excess microorganisms that proliferate are discharged out of the treatment process in the form of excess sludge. This process forms a huge amount of excess sludge. And because the excess sludge is a polymer of microbial cells, which contains a large amount of nutrients, it is difficult to make full use of it. A...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/02C02F11/06
CPCC02F11/02C02F11/00C02F11/006C02F11/06Y02W10/20
Inventor 何力波周凯旋
Owner 江苏御镐智能制造有限公司