Advanced municipal wastewater treatment system and method

A technology for advanced treatment and urban sewage, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of poor urban sewage treatment effect, high operating cost and long process flow and other problems, to achieve the effect of stable operation, good regeneration performance and low investment.

Inactive Publication Date: 2012-11-14
HUATIAN ENG & TECH CORP MCC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1: There is an urgent contradiction between the urgent need to meet the national first-class A standard for urban sewage treatment and the poor effect of existing urban se

Method used

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  • Advanced municipal wastewater treatment system and method

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Experimental program
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Effect test

Embodiment 1

[0037] Such as figure 1 As shown, the urban sewage advanced treatment system in this example includes grid sewage treatment devices connected in sequence, advection grit chambers, anoxic tanks, MBR aerobic tanks, and nano-hydration tanks with macroporous anion exchange resins as carriers. The adsorption filter and disinfection pool of iron oxide composite adsorbent, the sewage treatment scale is 50,000 m3 / d, and the influent is urban domestic sewage.

[0038] The grid sewage treatment device includes a coarse grid sewage treatment machine and a fine grid sewage treatment machine; the grid gap of the coarse grid sewage treatment machine is 30mm; the grid gap of the fine grid sewage treatment machine is 8mm; grid sewage treatment device is used to remove suspended solids in sewage;

[0039] The advection grit chamber is used for settling inorganic particles in sewage;

[0040] The anoxic pool is used for denitrification and denitrification treatment of sewage;

[0041] The MB...

Embodiment 2

[0057] The urban sewage advanced treatment system in this example includes a grid sewage treatment device, a swirl type grit chamber, an anoxic tank, an MBR aerobic tank, an adsorption filter and a disinfection tank connected in sequence; the grid sewage treatment device It includes two stages, the first stage is a coarse grid sewage treatment machine with a grid gap of 25mm, and the second level is a fine grid sewage treatment machine with a grid gap of 5mm. In a specific application process, the grid sewage treatment device can be one-stage or multi-stage. When the grid sewage treatment device has only one stage, the interval between the grid bars is preferably 6-12 mm, which can also meet the first-level A standard of advanced sewage treatment. But there is a problem, and the interception of the first-level gate sewage treatment machine needs frequent cleaning, otherwise it will cause problems such as difficulty in water discharge. When the grid sewage treatment device ado...

Embodiment 3

[0069] The urban sewage advanced treatment system in this example has a scale of 10,000 m3 / d, mainly including grid sewage treatment devices, aerated grit chambers, anoxic ponds, MBR aerobic ponds, adsorption filters and disinfection ponds. The grid sewage treatment device includes a coarse grid sewage treatment machine and a fine grid sewage treatment machine.

[0070] The advanced treatment method of urban sewage in this example includes the following steps:

[0071] 1) The sewage to be treated passes through the coarse grid sewage treatment machine with a grid gap of 20mm and the fine grid sewage treatment machine with a grid gap of 3mm to intercept larger suspended solids in the water;

[0072] 2) Then the water enters the aerated grit chamber to remove inorganic particles in the water, and the hydraulic retention time is 30s;

[0073] 3) The effluent of the aerated grit chamber and the reflux liquid of the aerobic tank enter the anoxic tank together, and carry out denitr...

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Abstract

The invention discloses an advanced municipal wastewater treatment system and method, which are designed to solve the problems that sewage treated by using the prior art can not achieve the specified national standard, the flow is long, the occupied area is large, the running cost is high and the like. The advanced municipal wastewater treatment system comprises a grill sewage treatment device, a grit chamber, an anoxia pool, an MBR (Membrane Bioreactor) aerobic biofilter, an adsorption filter internally filled with a composite nano ferrihydrite adsorbent, and a disinfecting tank which are communicated in sequence, wherein a sludge outlet for exhausting sludge is arranged at the bottom of the MBR aerobic biofilter. The advanced municipal wastewater treatment method comprises the steps of: removing suspension matters with the grill sewage treatment device, settling inorganic particles with the grit chamber, carrying out denitrification treatment, carrying out advanced purification treatment by an MBR membrane component, carrying out dephosphorization with the composite nano ferrihydrite adsorbent, and carrying out disinfection treatment on the water treated by the above steps, wherein a part of sludge subjected to advanced purification treatment by the MBR membrane component flows back into the denitrification treatment.

Description

technical field [0001] The invention relates to a system and method for treating urban sewage, in particular to a system and method for advanced treatment of urban sewage. Background technique [0002] With the continuous growth of my country's population and rapid economic development, water consumption and drainage are increasing year by year, while limited water resources are constantly being polluted, and the water environment is constantly deteriorating. At the same time, a large number of sewage treatment plants in our country were built during the "Ninth Five-Year Plan" and "Tenth Five-Year Plan", and the discharge standards are relatively low, which can no longer meet the requirements of total volume control. State Environmental Protection Administration Huanfa [2005] No. 110 "Notice on Strictly Implementing Pollutant Discharge Standards for Urban Sewage Treatment Plants" stated for the first time that "in order to prevent eutrophication of waters, the effluent of ur...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 杨磊
Owner HUATIAN ENG & TECH CORP MCC
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