能源植物在规模养猪废水处理中应用的研究进展

Research progress of the application of energy plants in the wastewater treatment of large-scale pig farming

规模养猪废水排放量大,含高有机物、高氨氮、高悬浮物等,处理不当易导致严重的环境问题。养猪废水作为液态肥,其肥效相对较低,运输成本高,原位就地处理显得非常必要。利用能源植物生长迅速、生物量大、分蘖能力强、根系发达等优势将养猪废水中的氮、磷等污染物吸收转化为植物的组成部分及构成利于微生物生长的根际环境增加脱氮除磷的效果,获得的能源植物用作沼气的原料进行循环利用,增加沼气的产量,解决养猪废水导致环境问题的同时带来经济效益。

The large - scale pig farming discharges a large amount of wastewater with high contents of organic matter, ammonia nitrogen and sus- pended solids and so on, and improper handling can lead to serious environmental problems. Owing to the relatively low fertilizer efficiency of swine wastewater as liquid fertilizer with high transportation cost, the in situ treatment is of great necessity. Energy plants can absorb and convert the nitrogen and phosphorus and other and other pollutants in swine wastewater into plant＇ s components, and constitute the rhizosphere environment that is conducive to microbial growth to increase the effect of nitrogen and phosphorus removal due to their advantages of rapid growth, large biomass, strong tillering ability and developed root system and so on. The obtained energy plants are used as the raw materials for biogas to be recycled, which can increase the biogas output and solve the environmental problems caused by swine wastewater, bringing economic benefit at the same time.