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Low-carbon high-nitrogen wastewater treatment device

A waste water treatment, low-carbon and high-nitrogen technology, applied in water/sewage multi-stage treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc. General issues such as high ammonia nitrogen load impact performance

Active Publication Date: 2011-06-01
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the biological aerated filter process is mainly used in the pretreatment of slightly polluted water sources, secondary and tertiary treatment of sewage, and is mostly limited to the treatment of ammonia nitrogen wastewater below 50mg / L; at the same time, there is a general impact resistance to high ammonia nitrogen load; The SS is required to be lower than 150mg / L; the amount of film hanging is small and slow, and the backwash is easy to fall off.

Method used

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Examples

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Embodiment 1

[0020] A large monosodium glutamate factory adopts UASB (anaerobic) + contact oxidation (aerobic) process, the COD of the effluent is 200-400mg / L, and the ammonia nitrogen seriously exceeds the standard, which cannot meet the discharge standard. The main process of hydrolytic acidification-cascade improved biological aerated filter was carried out in the field of small-scale test research, in which the hydraulic retention time was 18h, and engineering bacteria were used to inoculate microorganisms. Influent COD cr 80~150mg / L, NH 4 + - When N is 350-500mg / L and SS is 300-600mg / L, COD in effluent quality cr 30~50mg / L, NH 4 + -N 3~5mg / L, SS less than 5mg / L, which can meet the water quality standard of circulating cooling water reuse as circulating cooling replenishment water.

Embodiment 2

[0022] A chemical fertilizer factory in Hainan currently adopts SBR treatment process. Due to large fluctuations in water quality, the operation effect of SBR process is poor, ammonia nitrogen seriously exceeds the standard, and cannot meet the relevant effluent discharge standards. The device was used to carry out small-scale experimental research on high ammonia nitrogen wastewater on site, in which the hydraulic retention time was 12h, high-efficiency biological strains were used, and the influent COD cr 100~150mg / L, NH 4 + - When N is 300-500mg / L and SS is 100-200mg / L, COD in effluent quality cr Less than 50mg / L, NH4+-N less than 5mg / L, SS less than 5mg / L, which can meet the water quality standard for circulating cooling water reuse as circulating cooling replenishment water.

Embodiment 3

[0024] A steel plant is currently using A / O treatment process to treat coking wastewater. The ammonia nitrogen in the effluent seriously exceeds the standard and cannot meet the relevant effluent discharge standards. The device was used to carry out small-scale experimental research on high ammonia nitrogen wastewater on site, in which the hydraulic retention time was 12h, high-efficiency biological strains were used, and the influent COD cr 120~160mg / L, NH 4 + - When N is 200-400mg / L and SS is 100-200mg / L, COD in effluent quality cr 35~45mg / L, NH 4 + -N 2~3mg / L, SS 3~4mg / L, which can reach the water quality standard for circulating cooling water reuse as circulating cooling replenishment water.

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Abstract

The invention discloses a low-carbon high-nitrogen wastewater treatment device, belonging to an improved serial-connection biological aerated filter, characterized in that: the body of the device is composed of a wastewater pool 1, a bottom biological aerated filter device I, an intermediate biological aerated filter device II and a backwashing system, wherein the bottom biological aerated filterdevice I is internally provided with a support layer 5 to form the bottom layer, a biological filler layer 4 is arranged on the support layer 5, and an aerated pipeline is arranged on the upper part of the support layer 5 at the bottom of the biological filler layer 4; the intermediate biological aerated filter device II is internally provided with another support layer 5 to form the bottom layer, another biological filler layer 4 is arranged on the support layer 5 and the middle part of the biological filler layer 4 is provided with an intermediate aerated pipeline and is also provided with a reflux pump 11 simultaneously; and the backwashing system is composed of an air compressor 6, a backwashing drainage pipe 9 and an after-wastewater treatment drainage pipe 10.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering sewage treatment. It relates to a low-carbon and high-nitrogen wastewater treatment device, which can realize the treatment and transformation of various wastewaters in the fields of chemical fertilizer wastewater, leather wastewater, food wastewater (starch, monosodium glutamate, etc.), coking wastewater, etc. Background technique [0002] Such high-concentration ammonia-nitrogen wastewater is usually treated by stripping or stripping. The treated wastewater usually contains ammonia nitrogen, sulfide, phenols, cyanide and other pollutants. The concentration of ammonia nitrogen usually can reach Reaching 200mg / L; due to the low COD, this kind of wastewater has the characteristics of poor biodegradability and low C / N. Usually, the wastewater cannot be discharged up to the standard after treatment. [0003] At present, the main technologies for treating ammonia nitrogen wastewater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F3/12C02F3/10
CPCY02W10/10
Inventor 谢陈鑫赵慧滕厚开郑书忠陈军
Owner CHINA NAT OFFSHORE OIL CORP
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