The use of treated wastewater to irrigate the sugar beet ( Beta Vulgaris L. var. saccharifera) for bioethanol could play a strategic role to contrast the use of natural water resources and increase the productivity of the crop. The 2-year experiment (2013-2014) was performed on sugar beet irrigated with fresh water and wastewater at different steps of the reclamation process (secondary and tertiary treatments). The data obtained showed that the root sugar beet yield and ethanol production under fresh water treatment (52.2 Mg ha –1 and 5446 L ha –1 ) were lower respect to that obtained from the secondary and tertiary wastewater treatments (66.7 Mg ha –1 and 6785 L ha –1 , and 58.7 Mg h –1 and 6164 L ha –1 , respectively), with the same irrigation volumes. These results can depend on the higher quantity of nutrient uptake when wastewater is used for irrigation. In particular, the average N applied (as nitrate and ammonium) with irrigation during the growing seasons (2013 and 2014) was corresponding to the supply of 4, 28 and 20 kg ha –1 , for the fresh water, secondary, and tertiary wastewater treatments, respectively.
展开▼
机译：使用处理过的废水灌溉甜菜（Beta Vulgaris L. saccharifera）中的生物乙醇可发挥战略作用，以对比自然水资源的使用并提高农作物的生产率。在开垦过程的不同步骤（二级和三级处理）上，用淡水和废水灌溉的甜菜进行了为期2年的试验（2013-2014年）。获得的数据表明，在淡水处理（52.2 Mg ha –1和5446 L ha –1）下，根甜菜的产量和乙醇产量均低于从二级和三级废水处理（66.7 Mg ha –1和5）。灌溉量相同时分别为6785 L ha –1和58.7 Mg h –1和6164 L ha –1）。这些结果可能取决于废水用于灌溉时养分吸收量的增加。尤其是，在生长季节（2013年和2014年），通过灌溉施用的平均氮素（以硝酸盐和铵盐形式）对应于淡水，二次和三次废水的供应量分别为4、28和20 kg ha-1治疗，分别。
展开▼
