The invention relates to the technical field of harmless treatment of garbage, and discloses a method for cultivating
energy crop bamboo reed by using household garbage
incineration fly ash washing liquid, which comprises the following steps: washing household garbage
incineration fly ash with deionized water for multiple times according to a
solid-to-
liquid ratio of 1: (10-15), filtering and collecting the
fly ash washing liquid, and adjusting the pH value of the fly ash washing liquid to be neutral or weakly acidic; the fly ash washing liquid and
tap water are mixed according to the volume ratio of 1: (20-40) to prepare a
nutrient solution, and the
nutrient solution is used for conducting water culture on the bamboo reed seedlings. According to the invention, the
resource utilization of the fly ash washing liquid is realized, and the liquid which is traditionally treated as
hazardous waste is converted into a high-added-value
nutrient solution; the specific
synergistic mechanism of
potassium /
calcium /
magnesium ions in fly ash washing liquid and growth of the bamboo reeds is disclosed for the first time, the fly ash is washed with water and then mixed with
tap water to prepare the hydroponic
nutrient solution, compared with a conventional
nutrient solution preparation process, a large amount of cost can be saved, traditional chemical fertilizers can be replaced, and the yield of the bamboo reeds is greatly increased.