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Integrated bioreactor as well as application thereof and method for treating high-concentration organic wastewater

A bioreactor and organic wastewater technology, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc., can solve problems such as easy acidification, and achieve the effect of low cost, easy maintenance, and low investment

Active Publication Date: 2011-01-26
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem that the UASB reactor is easy to acidify when treating high-concentration organic wastewater under low temperature conditions (5-15°C), the existing solutions have deficiencies and limitations. The present invention provides an integrated bioreactor and a method for treating high-concentration organic wastewater. method to avoid acidification

Method used

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  • Integrated bioreactor as well as application thereof and method for treating high-concentration organic wastewater
  • Integrated bioreactor as well as application thereof and method for treating high-concentration organic wastewater

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Effect test

Embodiment 1

[0033] Its equipment and treatment process are the same as above, and the high-concentration organic wastewater is treated in winter with the present invention, the temperature is 5~15°C, and the wastewater quality is shown in Table 1:

[0034] Table 1 Water quality indicators of high-concentration organic wastewater

[0035] water quality index

COD (mg / L)

BOD(mg / L)

pH

Alkalinity

variation range

3500～4500

2900～3600

6.5～8.5

400～750

[0036] The hydraulic retention time of UASB is 18h, and the hydraulic retention time of MBBR is 6h. Suspended filler with a specific gravity of 0.96 is added to the MBBR area, the filling rate is 60%, and the dissolved oxygen content is 4mg / L. During operation, strictly monitor the pH of the effluent from the UASB reactor, and adjust the reflux ratio in time. The lowest pH is 6.3. At this time, adjusting the reflux ratio to 300% can restore the pH to above 6.8. During operation, the t...

Embodiment 2

[0041] Its equipment and processing flow are the same as above, handle certain brewery wastewater in winter with the present invention, and the wastewater quality is shown in Table 3:

[0042] Table 3 High-concentration organic wastewater water quality indicators

[0043] water quality index

COD (mg / L)

BOD(mg / L)

pH

Alkalinity

variation range

1800～2600

900～1600

6.0～7.0

300～550

[0044] The hydraulic retention time of UASB is 14h, and the hydraulic retention time of MBBR is 4h. Suspended filler with a specific gravity of 0.99 is added to the MBBR area, the filling rate is 40%, and the dissolved oxygen content is 2mg / L. During operation, strictly monitor the pH of the effluent from the UASB reactor, and adjust the reflux ratio in time. The lowest pH is 6.5. At this time, adjusting the reflux ratio to 200% can restore the pH to above 6.8. During operation, the treatment effect of the integrated reactor is good and st...

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Abstract

The invention discloses an integrated bioreactor as well as the application thereof and a method for treating high-concentration organic wastewater, belonging to the field of wastewater treatment. The integrated bioreactor adopts a concentric cylindrical structure, the inner layer of which is a UASB (Upflow Anaerobic Sludge Blanket) and the outer layer of which is an MBBR (Moving Bed Biofilm Reactor), wherein a pH online monitor is arranged at the water outlet of the UASB which is provided with a stirring device at the bottom, a cycle pump is arranged between a water collecting tank and the inlet of the reactor for refluxing the effluence of the MBBR in a reflux ratio of 100 percent in normal circumstance, and the MBBR is suitable for wastewater treatment at a lower temperature and can take a certain heat supply and preservation action to the UASB. In addition, an effluence pH value of the UASB is smaller than 6.8, and the stirring device of the UASB is started to increase the reflux ratio of the MBBR, complement the alkalinity of the UASB in time, maintain the acid-base balance of the UASB and ensure the biologic stability of microorganisms. The method and the device provided by the invention can stably treat the high-concentration organic wastewater under a low-temperature condition with high efficiency, has less investment, small floor area and stable operation without additional alkalinity or heating, saves maintenance and operation costs and reduces energy consumption.

Description

technical field [0001] The invention relates to a wastewater treatment device, its application and a method for treating wastewater, more specifically an integrated bioreactor, its application and a method for treating high-concentration organic wastewater. technical background [0002] In recent years, the upflow anaerobic sludge bed (UASB) has been widely used in the treatment of industrial wastewater in my country. Concentrated wastewater and other advantages, it can be used for wastewater treatment alone, or combined with aerobic biotechnology to obtain satisfactory effluent quality. UASB mainly operates at medium temperature (30-35°C) and high temperature (50-55°C). Microbial activity in the reactor is good, and ideal effluent quality can be obtained. However, when the temperature is low (such as in northern my country or in winter), the microbial activity in UASB is inhibited. Once the organic load is too high, the acid-base balance in the reactor is easily destroyed a...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/28C02F3/12C02F1/44C02F101/30
CPCY02E50/30Y02W10/10
Inventor 任洪强许柯丁丽丽谢吉程任鑫坤
Owner NANJING UNIV
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