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Integrated coking wastewater/excess sludge synchronous treatment method and treatment device

A technology for coking wastewater and excess sludge, which is applied in sludge treatment, biological sludge treatment, aerobic and anaerobic process treatment, etc. It can solve the problems of complex treatment process, high energy consumption, and failure to meet the requirements of low-carbon economy , to achieve the effect of tight bacterial arrangement, rich bacterial species, and strengthened dominant culture

Inactive Publication Date: 2012-05-02
太原大学
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The present invention aims at the disadvantages of traditional coking wastewater and excess sludge treatment process complex, high energy consumption, and does not meet the requirements of low-carbon economy, and provides a compact structure, low initial investment and operation costs, good treatment effect, and flexible scale Integrated dual-expanded granular sludge bed process capable of simultaneously treating coking wastewater and excess sludge

Method used

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  • Integrated coking wastewater/excess sludge synchronous treatment method and treatment device
  • Integrated coking wastewater/excess sludge synchronous treatment method and treatment device

Examples

Experimental program
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Effect test

Embodiment 1

[0054] Integrated coking wastewater / excess sludge synchronous treatment device such as figure 1 As shown, it consists of a double-expansion granular sludge reactor 8 and a waste water storage tank 1.

[0055] The double-expanded granular sludge reactor 8 is made of plexiglass. The whole reactor is divided into three parts: the aeration distribution chamber 6, the reaction area and the sedimentation area 12. Among them, the aeration distribution chamber 6 is located at the bottom of the reactor, with an inner diameter of 100 mm and a height of 0.2m, volume 1.5L; most of the reactor is the reaction zone, located in the middle of the reactor, with an inner diameter of 100mm, a height of 1.7m, and a volume of 12L; the precipitation zone 12 is located at the top of the reactor, with an inner diameter of 140mm, a height of 0.6m, and a volume of 6L.

[0056] In the reaction zone of the reactor, the filamentous bacteria used to degrade the pollutants in the wastewater moderately grow ...

Embodiment 2

[0070] Take the dewatered sludge cake of a sewage treatment plant in Taiyuan City for activity recovery and then inoculate it into the reactor of Example 1, and add a small amount of loose granular sludge as sludge, and take domestic sewage from a living quarter in Taiyuan City at about 35 °C Rapid domestication and cultivation of granular sludge under mesophilic conditions. Influent COD is 149-615mg·L -1 After about 60 days, the start-up was successful, the granular sludge was basically formed, the weight percentage of particles larger than 0.45mm reached 57%, and the methane-producing activity of the sludge reached 0.58gCODCH 4 · gVSS -1 d -1 , the COD removal rate remained at about 62%, and the organic load reached 6.9kgCOD·m -3 .d -1 about.

[0071] The next step is to form a double-expanded granular sludge bed and simultaneously cultivate key bacteria that can simultaneously treat coking wastewater and excess sludge. Coking wastewater was taken from a coking plant i...

Embodiment 3

[0074] Get the dewatered sludge of a sewage treatment plant in Taiyuan and inoculate it into the reactor of Example 1 after the activity recovery. The coking wastewater is taken from a coking plant in Taiyuan City. The concentrations of influent COD, ammonia nitrogen, phenols, SCN and CN are respectively 630-950mg·L -1 , 69-182mg·L -1 , 10.8-200.3mg·L -1 , 66.7-577.7mg·L -1 , 0.49-57.8mg·L -1. Using self-prepared beer wastewater, and adding a small amount of loose granular sludge as sludge, start the operation at 35°C, maintain HRT3.4h, and reduce the influent COD from 200mg·L within a week -1 Increase to 1000mg·L -1 , the influent load is 1.58kgCOD·m -3 d -1 Increase to 7.5kgCOD·m -3 d -1 , the granular sludge was rapidly formed in about 10 days, and the sludge concentration reached 32.7g·L -1 , VSS / SS reached 0.66, and the COD removal rate reached 94.7%.

[0075] Directly use coking wastewater to domesticate granular sludge, adopt continuous micro-aerobic aeration...

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Abstract

The invention relates to an integrated coking wastewater / excess sludge synchronous treatment method and an integrated coking wastewater / excess sludge synchronous treatment device. A double expanded granular sludge bed reactor is used in the process of treating coking wastewater, the micro oxygen state in the reactor is maintained through appropriate aeration, the moderate growth of filamentous fungi in the reactor is promoted, and moderate expansion of granular sludge is formed; a high liquid upflow velocity in the reactor is maintained in a mode of combining effluent external reflux with sludge internal reflux, and conditions are created for the moderate expansion of a granular sludge bed by combining a large amount of gas generated in the reactor; meanwhile, the dominant culture of efficient strains capable of synchronously and efficiently treating the coking wastewater and excess sludge in the double expanded granular sludge bed reactor is promoted, the coking wastewater and the excess sludge are synchronously and efficiently treated, and high biomass energy of a system is realized.

Description

technical field [0001] The invention relates to a method for synchronously treating coking wastewater and excess sludge, in particular to a method for treating coking wastewater and excess sludge with granular sludge. The present invention also relates to a treatment device suitable for the above coking wastewater and excess sludge treatment method. Background technique [0002] Coking wastewater treatment is a worldwide problem, and using granular sludge to treat coking wastewater is an effective method. According to the national technical policy on urban sewage pollution control, coking wastewater treatment will inevitably involve two aspects: sewage treatment and sludge treatment and disposal. [0003] 1) Efficient treatment of coking wastewater. Coking wastewater contains dozens of inorganic and organic compounds, including ammonia nitrogen, thiocyanide, sulfide, cyanide, phenol, aniline, benzopyrene, etc. It belongs to highly polluted and difficult-to-treat industrial...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F11/02
CPCY02W10/20
Inventor 董春娟潘青业耿炤宇赵甜甜王启军汪艳霞张红梅
Owner 太原大学
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