Application of oil shale semicoke and modified material thereof

Abstract

The invention belongs to the field of resource utilization of solid waste, and particularly relates to application of oil shale semicoke and a modified material of the oil shale semicoke as a compostadditive and a method for promoting composting. The invention discloses application of oil shale semicoke and a modified material thereof as a compost additive. Oil shale semicoke or oil shale semicoke subjected to acid-base and high-temperature modification activation is mixed with compost raw materials, composting is performed after uniform stirring, the pore structure of a compost body can be improved, degradation of organic matter is promoted, and the composting period is shortened; volatilization of ammonia gas can be inhibited, loss of N nutrients is reduced, and composting quality is improved; CH4 and N2O gases generated by an anaerobic environment in the composting process are greatly reduced; in addition, the oil shale semicoke belongs to solid waste, is low in price and huge in quantity, is used as a porous additive to be applied to the field of composting, resource utilization of the waste can be realized and wastes can be changed into valuable things, and organic pollutantssuch as polycyclic aromatic hydrocarbon and the like existing in the semicoke can be degraded by microorganisms, so that the environmental pollution is reduced.

Description

technical field [0001] The invention belongs to the field of resource utilization of solid waste, in particular to the application of oil shale semi-coke and its modified materials as compost additives and a method for promoting composting. Background technique [0002] With the development of human society, natural resources are constantly being developed and utilized, and the shortage of non-renewable energy, especially fossil energy, has become an important factor restricting the further development of society. As a new type of fossil energy with great potential, oil shale is considered to be an important substitute and supplement for traditional fossil energy such as coal and petroleum, and has been extensively developed and utilized. China is a big energy country with proven oil shale reserves of up to 720 billion tons. It is the largest producer of unconventional oil (from oil shale) in the world. Oil shale semi-coke is a by-product of the oil shale carbonization proc...

AI Technical Summary

Problems solved by technology

However, due to the low calorific value, oil shale semi-coke does not have much recycling value

A large amount of oil shale semi-coke is landfilled or stacked as solid waste, which not only takes up a lot of land resources, but also the leachate generated during the stacking process may contain organic pollutants such as polycyclic aromatic hydrocarbons, which will cause serious damage. soil and groundwater pollution

[0003] Publication Nos. CN107868672A, CN105694937B, CN203820707U and many other patents have proposed how to re-combust and recycle oil shale semi-coke under the condition of lower energy consumption. The recovered energy is very little, plus the energy consumption in the recycling process, the burning and recycling of oil shale semi-coke is not an economical method; the publication number is CN110523373A and the name is a kind of oil shale semi-coke adsorbent The preparation method and the publication number are CN106423113B name is a kind of patent of the preparation method of modified oil shale semi-coke adsorbent all proposed the method that oil shale semi-coke is used as adsorbent after modification, although these methods can realize High value-added utilization of oil shale semi-coke, but the market for pollutant adsorbents is difficult to absorb a huge amount of oil shale semi-coke, and the effect of oil shale semi-coke to adsorb pollutants has yet to be verified by the market; the public number is CN104803756A The name is an oil shale semi-coke bacterial fertilizer for improving soil physical and chemical properties and its preparation method. A method of using oil shale semi-coke as a bacterial fertilizer carrier is proposed. Semi-coke is directly applied to agricultural soil, which may bring certain environmental risks

Images