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Two-stage water supply bio denitrification system and process thereof

A technology of biological denitrification and water inflow system, which is applied in the field of two-stage water inflow biological denitrification system, can solve the problems of high operating cost and large investment, and achieve the effects of low operating cost, convenient operation and management, and low capital investment

Inactive Publication Date: 2009-01-07
山东美泉环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although various A / O improved processes and multi-stage influent biological denitrification processes currently used have achieved high denitrification efficiency, there are also common problems of large investment and high operating costs.

Method used

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  • Two-stage water supply bio denitrification system and process thereof

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Comparison scheme
Effect test

Embodiment 1

[0042] A protein wastewater, the water volume is 4000m 3 / d, the pool body adopts a rectangular steel concrete structure, BRN influent water COD is 820mg / L, BOD is 300mg / L, ammonia nitrogen is 240mg / L, effluent COD is about 80mg / L, removal rate is about 90.2%, BOD is 20mg / L or so, the removal rate is about 93.3%, ammonia nitrogen <10mg / L, the removal rate is about 95.8%, which is better than the first-level discharge standard in the "Comprehensive Wastewater Discharge Standard of the People's Republic of China" (GB8978-1996), and the operating cost Low, the water output is relatively stable.

Embodiment 2

[0044] Transformation of a certain protein wastewater, water volume is 3120m 3 / d, the original aerobic project used the SBR process, and the effluent water quality was poor, and both N and P exceeded the emission concentration stipulated by the state. After the transformation, the aerobic process used the BRN process. The COD of the BRN influent water quality was 1000mg / L, and the BOD was 400mg / L, ammonia nitrogen 250mg / L, effluent COD is about 80mg / L, removal rate is about 92%, BOD is about 20mg / L, removal rate is about 95%, ammonia nitrogen <10mg / L, removal rate is about 95.8% , the total P is less than 1.0mg / L, which is better than the first-level discharge standard in the "Integrated Wastewater Discharge Standard of the People's Republic of China" (GB8978-1996). After the transformation, the operation effect has been very good.

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Abstract

The invention discloses a two-section water inlet biological nitrogen removal system and the process thereof. The two-section water inlet biological nitrogen removal system and the process have the advantages of low investment, good effect and simple operation in engineering application through combining the research and the engineering practice of biological nitrogen removal. The system adopts the structure that the system comprises two anaerobic phases and an aerobic phase which are staggered with each other, wherein, each anaerobic phase communicates with a water inlet system; adjacent anaerobic phases communicate with the upper part of the aerobic phase through water excess pipes, and communicates with the bottom part thereof through a return system; the bottom of the aerobic phase communicates with an aerating system simultaneously; the aerating system is connected with a blowing device; and sludge discharge systems are arranged at the bottoms of the anaerobic phases at the starting end of the system.

Description

technical field [0001] The invention relates to a process for treating sewage containing high-concentration ammonia nitrogen, in particular to a two-stage water-influent biological denitrification system and its process in which sewage enters two process sections and can successfully remove nitrogen in sewage without adding additional carbon sources. Background technique [0002] With the continuous improvement of industrialization and urbanization, the total amount of sewage discharge in all countries in the world is increasing, causing serious pollution of the water environment. Among them, the eutrophication of the water body caused by the large discharge of nutrients such as nitrogen and phosphorus is the most prominent. Excessive nitrogen compounds entering the water body will deteriorate the quality of the water body, affect the development of fisheries and endanger human health. s concern. There are many ways to remove nitrogen from wastewater, such as stripping meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
Inventor 乔壮明张科任雪亭张海燕
Owner 山东美泉环保科技有限公司
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