這些年,產業結構調整,城市化進程的快速發展,在全國范圍內的大中型城市都開始實施“退二進三”、“退城進園”政策,大批涉及到化工,冶金,石油行業的污染企業先后搬遷或關閉,大量工業搬遷遺 留下的場地污染土壤在再次開發利用過程中,污染物會直接對區域內土地上從事生產,生活人員的健康構成嚴重威脅,隨著土壤污染面積加大,更是出現復合型、混合型高風險污染區,呈現出城郊向農村延伸、局部向區域蔓延趨勢。
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.
在整個工程項目中,所使用的設備包括:土壤預處理、輸送、物理篩分、增效淋洗、水土分離,自動攪拌一體車、壓濾機等眾多混凝土設備,在物料中的細粒百分含量是決定該項技術修復效果與成本的關鍵因素,若在物料中含有25%以上黏粒,修復成本會明顯提升,在這種情況下,不會考慮采用化學淋洗技術。
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.
隨著國內對環境污染問題的重視,修復行業發展前景非常廣闊,但當前多數自動攪拌一體車企業依然面臨著環境治理資金不足的情況,在PPP模式下的服務商業模式是化解環保服務困境的一條有利道路,未來隨著環境稅的開征,地方政府補貼的來源范圍會更加廣泛。
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.