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Organic wastewater treatment method and apparatus

A technology for organic wastewater and water treatment, applied in the field of anaerobic treatment, can solve the problems of reduced concentration of granular sludge, difficulty in continuous treatment, low COD removal rate, etc., and achieve the effect of promoting contact reaction and avoiding clogging

Inactive Publication Date: 2008-02-27
EBARA ENG SERVICE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since this refractory component itself forms a hindrance to anaerobic microorganisms (does not form a matrix), the removal rate of COD is low in wastewater treatment where the refractory component accounts for a high proportion.
[0007] (2) When the refractory components are treated by the UASB method, the density of the granular sludge is reduced, and the concentration of the granular sludge is reduced. In addition, since it is easy to flow out of the reactor, continuous treatment becomes difficult

Method used

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  • Organic wastewater treatment method and apparatus
  • Organic wastewater treatment method and apparatus
  • Organic wastewater treatment method and apparatus

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Experimental program
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Effect test

Embodiment 1

[0054] In the experiment, 2 series (A series, B series) of the upflow type anaerobic reactor filled with activated carbon as shown in FIG. 1 were used.

[0055] The devices of series A and series B have the same structure, and two inclined baffles are installed so that the angle between the side wall of the device and the baffle 3 is 30 degrees, and defoaming agent is added to the raw water. The capacity of the liquid layer part is 100 liters. The water temperature in the reactor was controlled at a temperature of 35°C. These two reactors were filled with 60 liters of granular activated carbon having an effective particle diameter of 0.3 mm and an equalization coefficient of 1.5, and 10 liters of UASB particles (MLSS concentration 5%) for treating beverage wastewater as seed sludge.

[0056] In raw water, use sodium acetate (based on COD cr Conversion, 750mg / L) and terephthalic acid (based on COD cr In conversion, it is 350 mg / liter) mixed, and inorganic nutrient salts (nit...

Embodiment 2

[0063] Using the B series used in Example 1 above, the experiment was started again using the raw water of Example 1. The experimental results are shown in Figure 3. By day 90, the COD load was 3kg / m 3 / day, the raw water volume is 150 liters / day, and the circulating fluid volume is 300 liters / day. The amount of biogas generated is 55 liters / day, and the COD concentration of the treated water is 35 mg / liter. After the 91st day, make the COD load 6kg / m 3 / day, the circulating liquid volume is still 300 liters / day, only the raw water volume is increased to 300 liters / day. Until the 100th day, with the increase of the load, the COD concentration of the treated water was 35mg / L, and there was almost no change. Although the gas generation amount of the treated water increased, but after that, it was found that the concentration of terephthalic acid hindered, and at the 150th day day, the amount of biogas production is reduced to 90 liters / day. Calculated from the amo...

Embodiment 3

[0065] The upflow anaerobic reactor filled with activated carbon shown in Fig. 1 was used in the experiment. The internal structure of the reactor, the filled activated carbon and the kind of sludge are the same as in Example 1. As raw water, glycol wastewater from a chemical factory is used. COD of the raw water cr The concentration is about 10,000mg / liter.

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Abstract

This invention provides anaerobic biological treatment method and apparatus that can stably treat hardly degradable component-containing organic wastewater in a high-performance manner for a long period of time. The anaerobic biological treatment method for organic wastewater comprises providing an upflow anaerobic reactor (2) packed with activated carbon, withdrawing a part of treatment water (9) from the top of the reactor (2), and circulating the withdrawn water to the reactor (2) in its bottom or raw water inflow part. In this method, the amount of the liquid circulated from the top of the reactor (2) to the bottom or raw water inflow part is regulated according to the treatment status of the reactor (2). For example, the concentration of inhibitory organic matter of the treatment water and / or the amount of methane gas in relationship with inflow CODcr in the reactor may be mentioned as the treatment status of the reactor (2). Seed sludge may be added to the reactor (2) simultaneously with or after packing of the activated carbon. A multistage gas-liquid-solid separation part (3) for separating the produced methane gas, the treatment water and the packing material provided in a vertical direction may be provided in the reactor (2), and, in addition, means for measuring the amount of the separated methane gas may be provided.

Description

technical field [0001] This field relates to an anaerobic treatment method and device for making organic waste water harmless, and more specifically, relates to a biological anaerobic treatment method and device for organic waste water containing refractory components. [0002] The treatment of organic wastewater mostly uses the activated sludge method under aerobic conditions. However, in recent years, microbial decomposition under anaerobic conditions has been increasingly used from the viewpoint of energy saving and reduction in the amount of excess sludge produced. The invention relates to a method and a device for anaerobically treating waste water containing obstructive organic matter and diluted organic waste water by filling active carbon in an upflow reactor as an organic matter adsorption material-microbial carrier. Background technique [0003] In the aerobic activated sludge method generally used for the treatment of organic wastewater, the energy consumption fo...

Claims

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Application Information

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IPC IPC(8): C02F3/28C02F1/28C02F3/06
CPCC12M21/04Y02E50/343C02F3/2806C12M29/18C12M23/36C02F1/283C12M47/02C02F2209/285Y02E50/30
Inventor 津野洋河村正纯田中俊博本间康弘岛村和彰田中美奈子
Owner EBARA ENG SERVICE
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