Innocent treatment method for oil-containing sewage sludge

Abstract

The invention provides a method for harmless treatment of oily sludge. The method includes the steps of: ①collecting the oily sludge together; ②homogenizing the collected liquid oily sludge, and after a mixing and homogenizing process, Fully mix various oily sludges to form liquid oily sludge with relatively stable and balanced physical and chemical properties; The first fermentation treatment of oxidation; ④ conversion of oily sludge into biological sludge for dehydration and concentration; ⑤ second fermentation treatment; ⑥ second fermentation treatment. The beneficial effect is that the method of the invention has low processing cost, simple operation, low investment and small occupied area, so that the cost of sludge dewatering is greatly reduced. Using this treatment method, the oily sludge can be converted into high-quality organic fertilizers for agricultural production, thereby achieving the purpose of clean production and environmental protection, and has a good promotion prospect.

Description

technical field [0001] The invention relates to a treatment method for sludge, in particular to a method for harmless treatment of oily sludge produced in petroleum production and processing. Background technique [0002] The treatment of oily sludge generated during petroleum production and processing is a worldwide problem. Many engineers, experts and scholars have made unremitting efforts and released many fruitful results, but no one has been found. A better way of handling it. Therefore, at present, most companies still use landfill for the oily sludge generated in the oil production and processing process, and some companies invest huge sums of money in incineration; some companies introduce or develop new types of thermal deoiling, and then Methods of remanufacturing building materials. The above-mentioned methods, for the treatment of oily sludge for the purpose of environmental protection, actually belong to the transfer of pollutants, and none of them fundamental...

AI Technical Summary

Problems solved by technology

The above-mentioned methods, for the treatment of oily sludge for the purpose of environmental protection, actually belong to the transfer of pollutants, and none of them fundamentally solve the pollution problem of oily sludge.

Because there are a large amount of petroleum substances remaining in the oily sludge, the environment where these substances are discharged will definitely pollute the environment. Even if they are buried in a fixed place, it will inevitably cause damage to the local groundwater due to long-term leakage. Pollution, but also due to changes in climate and temperature, some petroleum substances will volatilize and pollute the air

Therefore, landfill treatment is actually an irresponsible treatment method that is out of sight and out of mind; as for incineration, although it has achieved very significant results in reduction and harmlessness, the incineration process is often ignored Air pollution caused by volatilization of petroleum substances

Therefore, the incineration technology as a whole still needs to be further improved, especially the large investment and high operating costs of this treatment method are still a difficult problem to solve

Recently, there is also a method of thermally degreasing oily sludge first, and then mixing it with soil to make bricks. This method has achieved remarkable results in harmlessness, but it also has the disadvantages of large investment, high operating cost and difficult operation. characteristics, it is also very difficult to promote

[0003] In recent years, great progress has also been made in the microbial fermentation treatment of oily sludge, which is generally limited to solid fermentation after dehydration of oily sludge and adding fermentation-promoting agents. However, due to the The content of petroleum substances and other organic components in oily sludge is too high. It is difficult to achieve the ideal treatment effect through simple one-time microbial fermentation. The fundamental reason is that in the process of solid fermentation, the energy and nutrients required by microorganisms Due to the lack of a relatively smooth way for the transmission of oily sludge, it is difficult to control the fermentation process, the reaction degree of oily sludge fermentation is low, and the treatment effect cannot be exerted normally, so it has not been well promoted.

However, a lot of previous data show that the focus of research is on the treatment of oily sludge after dehydration treatment, trying to carry out microbial fermentation of dehydrated oily sludge, some advocate aerobic fermentation, and some advocate anaerobic fermentation. Oxygen fermentation, but the treatment effect is not very good, because the oily sludge is fermented after dehydration, whether it is aerobic fermentation or anaerobic fermentation, because the exchange of substances and energy required in microbial life activities cannot be carried out smoothly. hard to promote

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