what are the current soil remediation technologies?
The refractory pollutants that accumulate in polluted soil are difficult to eliminate by dilution and self-purification. once soil pollution occurs, even if the source of pollution is cut off, it is difficult to work immediately, sosoil remediation technologycame into being, which can be
The refractory pollutants that accumulate in polluted soil are difficult to eliminate by dilution and self-purification. once soil pollution occurs, even if the source of pollution is cut off, it is difficult to work immediately, so soil remediation technology came into being, which can be roughly divided into physical and chemical remediation technology and bioremediation technology according to the principle of operation.
physicochemical remediation techniques refer to techniques that use the physicochemical properties between soil and pollutants to destroy (e.g., change chemical properties) and separate or solidify contaminants. it mainly includes soil vapor phase extraction, soil leaching, electric repair, chemical oxidation, solvent extraction, curing/stabilization, thermal desorption, cement kiln collaborative disposal, physical separation, barrier filling and permeable reaction wall technology. physicochemical remediation technology has the advantages of short implementation cycle and can be used to treat various contaminants.
bioremediation technology is a green environmental remediation technology developed in the past 20 years, which refers to the comprehensive use of modern biotechnology to destroy the structure of pollutants and promote the absorption and utilization of pollutants by creating an environment for the growth of near-conjugated microorganisms or plants. soil bioremediation technologies include phytoremediation, microbial remediation, biocommunal remediation, etc. bioremediation techniques are cost-effective and often require little or no subsequent treatment, however bioremediation may result in the residue of more difficult-to-degrade and more toxic contaminants in the soil, and sometimes toxic by-products are generated during the bioremediation process.
The various technologies of soil remediation currently have specific applications and limitations. In particular, physical and chemical remediation techniques can easily lead to soil structure destruction, soil nutrient loss and biological activity decline. Bioremediation, especially phytoremediation, is currently an environmentally friendly method of restoration. However, soil pollution is mostly compound pollution, and phytoremediation also faces technical difficulties. In recent years, Desen Environment has developed in depth into the field of environmental protection equipment research and development and manufacturing, and has continuously polished and improved its own research and development technology. The newly developed skid-mounted modular design of soil remediation equipment meets the needs of different processes and rapid installation and transition. Equipped with an intelligent cloud management platform, it can flexibly switch between multiple interfaces on the PC side and mobile phone side to realize remote operation of the device and data analysis. At present, our equipment has reached a soil remediation volume of 100t/h, which has been strongly recognized by the market.
