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对脱水蓝藻进行大型生产性堆肥实验。研究堆肥过程中,氮损失抑制剂过磷酸钙的添加对堆肥物料各类理化性质的影响。研究结果表明,过磷酸钙加入的处理组与未加过磷酸钙的对照组堆制37 d后堆肥物料均可腐熟,且堆肥肥效均符合NY525-2002的相关要求。添加过磷酸钙处理组有机质含量为490 g/kg,全N、全P和全K含量分别为20.75、10.02和11.32 g/kg,总养分含量达到9.77%,堆肥品质明显优于对照处理。同时,在微生物的作用下,对照组中微囊藻毒素MC-RR与微囊藻毒素MC-LR去除率分别达到89.8%与78.3%。值得一提的是,添加过磷酸钙后,MC-RR和MC-LR的去除率得到进一步提高,分别达到了92.96%和100%,较好地保证了蓝藻堆肥农用的安全性,为脱水蓝藻好氧堆肥化提供了可行性依据。
Large-scale productive composting experiments on dehydrated cyanobacteria. To study the effects of nitrogen loss inhibitor superphosphate on the physicochemical properties of composting materials in composting process. The results showed that the compost materials could be decomposed 37 days after the superphosphate was added into the treatment group and the control group without the superphosphate, and the compost efficiency complied with the requirements of NY525-2002. The content of organic matter was 490 g / kg, total N, total P and total K were 20.75, 10.02 and 11.32 g / kg, respectively, and the total nutrient content was 9.77%. The composting quality was obviously better than the control. Meanwhile, under the action of microorganisms, the microcystin MC-RR and microcystin MC-LR removal rates of the control group reached 89.8% and 78.3% respectively. It is worth mentioning that, after adding superphosphate, MC-RR and MC-LR removal rate has been further improved, respectively, reached 92.96% and 100%, better to ensure the safety of cyanobacteria compost agriculture, for the dehydration of cyanobacteria Aerobic composting provides a feasibility basis.