【摘要】 利用土地处理技术研究了电厂废水无害化、资源化的利用途径。土地处理系统选取慢速渗滤和污水资源利用型参数,以实现污水处理与生态环境建设的结合。试验植物为乔木、灌木与牧草,分别选取新疆杨(PopulusalbaVar.PyramidalisBunge)、沙棘(Hippophaerhamnoides)与黄花草木樨(Melilotussuaveolens)。本试验设计了高(3000mm布水+降雨)、中(1500mm+降雨)、低(移栽时少量布水+降雨)3个水力负荷试验区,分别用H、M、L表示。运行结果表明,电厂废水经预处理后可用于沙地植被恢复灌溉,本地区具备推广土地处理技术的良好条件,污水资源的无害化利用有助于增加镶嵌型复合生态系统的稳定性,在此类干旱、半干旱地区推广土地处理技术对于加快植被恢复改善生态环境具有良好效果。更多还原

【Abstract】 The shortage of water resources is one of main restrictive factors for the fast recovery of vegetation in Kubuqi sandy land. This paper investigated the harmless and utilization ways of wastewater from power station as renewable resource by means of land treatment technology. Slow percolation rate and index of wastewater utilization in land treatment system were selected as systematical parameters in order to achieve the combination of wastewater treatment and ecological environment construction. Poplar, sea buckthorm and sweet clover were selected representing arbor, shrub and herbage, respectively. Three hydraulic loading treatments were designed, including high (3 000 mm +natural precipitation), medium (1 500 mm +natural precipitation) and low hydraulic loading (only irrigating when transplanting +natural precipitation). The results showed that after pre-treatment, the wastewater from power station could be applied in vegetation recovery in sandy land where existed relative good conditions to develop the technology of land treatment, and the reuse of wastewater resource would benefit the stability of inlaying ecological system. Good results could be achieved by applying the land treatment system in the arid and semi-arid area for fast recovery of vegetation and improvement of ecological environment.更多还原