Reclaimed water application to vegetation restoration in mining area: Determination of water quality standards and optimization of moderate treatment technology

Le Chen,Panyue Zhang,Yajing Cai,Kai Sun,Zhen Zhang,Jinsong Liang,S Trukhanov,C.-W Chow

doi:10.1051/e3sconf/202126001026

Le Chen, Panyue Zhang + Show 6 more

Open Access

https://doi.org/10.1051/e3sconf/202126001026

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Abstract

Water shortage severely restricts vegetation restoration of mining area in the northwest China. Moderate treatment of reclaimed water is essential for improving the local ecological environment. In this study, relevant water quality standards issued by the states and research results were comprehensively considered to propose a reclaimed water quality standard suitable for vegetation restoration of mining area. The available domestic sewage and mine water was moderately treated by hybrid biological reactor system and nanofiltration membrane system, respectively. The effluent quality meet the requirement of reclaimed water quality standards in this study. This study provides theoretical support for vegetation restoration of mining area.

Highlights

The land desertification is serious in northwest China
The available reclaimed water sources in mining area include domestic sewage and mine water, which are important for vegetation restoration
In consideration of the treatment effect, operation cost and species resistance, the moderate treatment of wastewater guarantees the removal of pollutants, which may destroy the vegetation, and ensures that the appropriate amount of nitrogen and phosphorus are used as nutrients for vegetation [9]

Summary

Introduction

The land desertification is serious in northwest China. In mining area, ecological functions continue to deteriorate [1-2]. Using appropriate vegetation and soil amendments can effectively improve the ecological environment [3-5]. The water for vegetation restoration is in short supply in the northwest China [6-8]. To solve this problem, improving water use efficiency and seeking innovations in water resources management are feasible solutions [7]. The available reclaimed water sources in mining area include domestic sewage and mine water, which are important for vegetation restoration. There is little study on water quality standard for vegetation restoration in mining areas.

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Conclusion