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

A technology for coking wastewater and excess sludge, applied in sludge treatment, biological sludge treatment, aerobic and anaerobic process treatment, etc., can solve the problems of complex treatment process, high energy consumption, not meeting the requirements of low-carbon economy , to achieve the effect of close arrangement of flora, rich strains, and strengthening of dominant culture.

Inactive Publication Date: 2014-05-14
太原大学
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

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Experimental program
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Effect test

Embodiment 1

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

[0055] The double-expanded granular sludge reactor 8 is made of organic glass. The whole reactor is divided into three parts: aeration distribution chamber 6, reaction zone and precipitation zone 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 0.2m, volume 1.5L; most of the reactor is a 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, filamentous bacteria used to degrade pollutants in the wastewater grow moderately to cause moderately expanded...

Embodiment 2

[0070] Take the dehydrated sludge cake of a sewage treatment plant in Taiyuan City for activity recovery and inoculate it into the reactor of Example 1, and add a small amount of loose granular sludge as a sludge, and take the domestic sewage of a living quarter in Taiyuan City at about 35°C Rapidly domesticate and cultivate granular sludge under medium temperature conditions. Influent COD is 149-615mg·L -1 , The start-up was successful in about 60 days, the granular sludge was basically formed, the weight percentage of particles larger than 0.45mm reached 57%, and the methanogenic activity of the sludge reached 0.58gCODCH 4 ·GVSS -1 ·D -1 , The COD removal rate is kept at about 62%, and the organic load reaches 6.9kgCOD·m -3 .d -1 about.

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

Embodiment 3

[0074] Take dewatered sludge from a sewage treatment plant in Taiyuan for activity recovery and inoculate it into the reactor of Example 1. The coking wastewater is taken from a coking plant in Taiyuan. The influent COD, ammonia nitrogen, phenols, SCN and CN concentrations 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 . Use self-prepared beer wastewater and add a small amount of loose granular sludge as sludge. Start the operation at 35℃, maintain HRT for 3.4h, and reduce the influent COD from 200mg·L within one week -1 Increase to 1000mg·L -1 , The water inlet load is 1.58kgCOD·m -3 ·D -1 Increase to 7.5kgCOD·m -3 ·D -1 , Granular sludge is formed quickly in about 10 days, and the sludge concentration reaches 32.7g·L -1 , VSS / SS reached 0.66, and COD removal rate reached 94.7%.

[0075] Directly use coking wastewater to domesticate granular sludge, using continuous micro-oxygen aeration, and start the return flow inside...

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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 synchronous treatment of coking wastewater and surplus sludge, in particular to a method for treating coking wastewater and surplus sludge by using granular sludge. The invention also relates to a treatment device suitable for the aforementioned coking wastewater and excess sludge treatment method. Background technique [0002] Coking wastewater treatment is a worldwide problem. Using granular sludge to treat coking wastewater is an effective method. According to the state's technical policies on urban sewage pollution control, the treatment of coking wastewater will inevitably involve sewage treatment and sludge treatment and disposal. [0003] 1) The problem of 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 high-polluting and difficult-to-treat ind...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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