Method for degrading organic wastewater through electrolytic stimulation of mineralized refuse supported microorganisms

A technology for microbial electrolysis and mineralization of garbage, applied in the field of environmental pollution control, can solve problems such as a single current range of bacterial flora, and achieve the effect of enhancing the treatment effect, facilitating degradation, and broadening the range of electrolysis current.

Active Publication Date: 2014-01-08
江阴智产汇知识产权运营有限公司
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AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the shortcomings of single bacterial population and narrow current range that can be tolerated in the microbial electrolytic stimulation technology in the prior art, and to provide a method for degrading organic wastewater by microbial electrolytic stimulation loaded with mineralized garbage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add Dye Orange II wastewater with a concentration of 35mg / L into the electrolytic cell, and then add the mineralized waste that has been crushed through a 100-mesh sieve and landfilled for 15 years. The solid-liquid mass ratio of the mineralized garbage and wastewater is 1:500. The electrode materials of both electrodes are graphite electrodes, the current of the electrolytic cell is connected, and the current between the two electrodes is 40mA. After 2 hours, the organic matter in the wastewater is oxidized and degraded, precipitated and separated, and the concentration of pollutants in the wastewater is analyzed, and the removal rate reaches 82.2%.

[0019] For the same wastewater, under the same conditions, but without adding mineralized waste, the pollutant removal rate was 30.1% in the same treatment time.

[0020] For the same wastewater, only adding mineralized waste without electricity, in the same treatment time, the pollutant removal rate is only 5.7%.

Embodiment 2

[0022] The methylene blue wastewater with a concentration of 35mg / L was added to the electrolytic cell, and then the mineralized waste that had been crushed through a 50-mesh sieve and landfill for 8 years was added. The solid-liquid mass ratio of the mineralized garbage and the wastewater was 1:1000. The materials are all graphite electrodes, the current of the electrolytic cell is turned on, and the current between the two electrodes is 5mA. After 5 hours, the organic matter in the wastewater is oxidized and degraded, and the organic matter in the wastewater is separated by precipitation. The concentration of pollutants in the wastewater is analyzed, and the removal rate reaches 82.2%. After precipitation and separation, the solid was left, and the same waste water was added, and the reaction was continued under the same conditions. After 5 hours, the removal rate was 84.5%.

[0023] For the same wastewater, under the same conditions, but without adding mineralized waste, the...

Embodiment 3

[0026] Phenol wastewater with a concentration of 10mg / L is continuously fed into the electrolytic cell with inlet and outlet, and then the mineralized waste that has been crushed through a 50-mesh sieve and buried for 8 years, the solid-liquid of the mineralized garbage and the wastewater in the electrolytic cell is added. The mass ratio is 1:500, the electrode materials of both electrodes of the electrolytic cell are graphite electrodes, the current of the electrolytic cell is turned on, the current between the two electrodes is 30 mA, and the residence time of the wastewater is 3 hours. After the overflow outlet, the solid and liquid are separated, and the pollutants in the water are analyzed. Concentration, after long-term operation, the removal rate is between 83.7% and 89.5%.

[0027] For the same wastewater, under the same conditions, but without adding mineralized waste, the pollutant removal rate is between 21.7% and 37.4% in the same treatment time.

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Abstract

The invention provides a method for degrading organic wastewater through the electrolytic stimulation of mineralized refuse supported microorganisms. The method comprises the following steps: adding organic wastewater in an electrolytic cell and then adding the mineralized refuse, wherein the solid-to-liquid ratio of the mineralized refuse to the wastewater is 1:(500-1000) and the electrode materials of the two poles of the electrolytic cell are graphite; and connecting the current of the electrolytic cell, wherein the current between the two poles is 5-40mA; oxidizing and degrading the organic matter in the wastewater after 2-5 hours; and separating out precipitates so that the wastewater can reach the standard to be discharged. By utilizing the adaptability and strong treatment capability of the various floras carried by the mineralized refuse on organic polluted wastewater, the treatment effect can be enhanced; and as the microorganisms attach to the insides of the holes of the mineralized refuse and the impact on the active oxidation groups on electrode surfaces is low, the electrolytic current can be increased, the impact of the outside on the living environment in the holes is low, pollutants are adsorbed near the holes and the pollutants can be easily degraded.

Description

technical field [0001] The invention relates to the technical field of environmental pollution control, in particular to a method for degrading organic wastewater by electrolysis stimulation of mineralized garbage-loaded microorganisms. Background technique [0002] After more than 8 years of landfilling, the municipal solid waste has been changed under the action of physics, chemistry and biology. Rubbish". [0003] There are dozens of sanitary and quasi-sanitary urban domestic waste landfills and general storage yards in China, and tens of millions of tons of garbage have been filled or stacked. Some of the garbage has basically reached a stable state after being degraded for 8-10 years. In Shanghai, there are at least 40 million tons of this mineralized waste (20 million tons at the Laogang landfill, nearly 20 million tons in the urban and suburban storage yards and Jiangzhen storage yards over the years). There are also estimated to be tens of millions of tons of mine...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34
Inventor 马建锋邹静姚超李定龙
Owner 江阴智产汇知识产权运营有限公司
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