这些年,产业结构调整,城市化进程的快速发展,在全国范围内的大中型城市都开始实施“退二进三”、“退城进园”政策,大批涉及到化工,冶金,石油行业的污染企业先后搬迁或关闭,大量工业搬迁遗 留下的场地污染土壤在再次开发利用过程中,污染物会直接对区域内土地上从事生产,生活人员的健康构成严重威胁,随着土壤污染面积加大,更是出现复合型、混合型高风险污染区,呈现出城郊向农村延伸、局部向区域蔓延趋势。
In recent years, with the adjustment of industrial structure and the rapid development of urbanization, large and medium-sized cities across the country have begun to implement the policies of "withdrawing from the second to the third" and "withdrawing from the city to the park". A large number of polluting enterprises involved in the chemical, metallurgical and petroleum industries have moved or closed down one after another. In the process of redevelopment and utilization of the contaminated soil left by a large number of industrial relocation sites, Pollutants will directly pose a serious threat to the health of people engaged in production and living on the land in the region. With the increase of soil pollution area, there are more complex and mixed high-risk pollution areas, showing the trend of suburban extension to rural areas and local extension to the region.
在整个工程项目中,所使用的设备包括:土壤预处理、输送、物理筛分、增效淋洗、水土分离,自动搅拌一体车、压滤机等众多混凝土设备,在物料中的细粒百分含量是决定该项技术修复效果与成本的关键因素,若在物料中含有25%以上黏粒,修复成本会明显提升,在这种情况下,不会考虑采用化学淋洗技术。
In the whole project, the equipment used includes: soil pretreatment, transportation, physical screening, efficiency leaching, water and soil separation, automatic mixer truck, filter press and many other concrete equipment. The percentage of fine particles in the material is the key factor to determine the repair effect and cost of the technology. If the material contains more than 25% clay particles, the repair cost will be significantly increased, In this case, chemical leaching technology will not be considered.
随着国内对环境污染问题的重视,修复行业发展前景非常广阔,但当前多数自动搅拌一体车企业依然面临着环境治理资金不足的情况,在PPP模式下的服务商业模式是化解服务困境的一条有利道路,未来随着环境税的开征,地方政府补贴的来源范围会更加广泛。
With the domestic attention to the problem of environmental pollution, the development prospect of the repair industry is very broad, but at present most of the automatic mixer enterprises are still facing the situation of insufficient funds for environmental governance. The service business model under the PPP mode is a favorable way to solve the dilemma of environmental protection services. In the future, with the introduction of environmental tax, the source range of local government subsidies will be more extensive.