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选取锯木屑和药渣作为调理剂并分别添加酸化沸石、过磷酸钙和氢氧化镁与磷酸的混合液作为氮素固定剂或损失抑制剂,研究了蓝藻堆肥的效果.结果表明,V(蓝藻)∶V(锯木屑)∶V(药渣)=1∶1∶1时极易发酵.添加氮素固定剂在堆肥前期能促进发酵,特别是添加过磷酸钙的处理最高温度达66.8℃.固定剂的添加能促进物料的降解,尤其添加过磷酸钙的促进作用比较明显;各氮素固定剂在蓝藻堆肥过程中都起到了抑制氮素损失的作用,其中过磷酸钙和Mg(OH)2与H3PO4混合液对氮素的固定率达50%以上,且对氨氮的固定效果较好.堆肥结束后,添加过磷酸钙和Mg(OH)2与H3PO4混合液的两处理氨氮比堆肥起初分别增加23.52%和28.06%,P素分别增加了67.56%和36%.随着堆肥的进行,各处理堆肥物料中N、P、K含量均明显升高,C/N比显著下降,发芽指数增加到75%以上,而且添加氮素固定剂的处理效果更为明显.可见采用高温堆肥和氮素固定技术可有效实现蓝藻的资源化利用.
The effects of sawdust and dregs as conditioning agent and addition of acidified zeolite, superphosphate and mixture of magnesium hydroxide and phosphoric acid as nitrogen fixing agent or loss inhibitor were studied respectively.The results showed that V ): V (sawdust): V (dregs) = 1: 1: 1 easily fermented.Adding nitrogen fixative can promote the fermentation in the early composting stage, especially the maximum temperature of the treatment of adding superphosphate reached 66.8 ℃. The addition of fixative can promote the degradation of materials, especially the promotion of superphosphate addition. All nitrogenous fixatives play a role of inhibiting nitrogen loss in the process of cyanobacteria composting. Among them, superphosphate and Mg (OH) 2 and H3PO4 mixed solution on nitrogen fixation rate of more than 50%, and the ammonia nitrogen fixation better.After the composting, add superphosphate and Mg (OH) 2 and H3PO4 mixture of two treatment ammonia nitrogen compost at the beginning Increased by 23.52% and 28.06% respectively, P increased by 67.56% and 36% respectively.With compost, N, P and K contents of composting materials increased significantly, C / N ratio decreased significantly, germination index Increased to more than 75%, and the effect of adding nitrogen fixative is more obvious. Can be seen using high temperature composting and nitrogen fixation technology can effectively achieve the utilization of cyanobacteria.