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为探索和优化脱水蓝藻藻泥好氧堆肥无害化处理工艺参数,利用堆肥反应器,研究了C/N分别为5(T1)、15(T2)和25(T3)的处理对蓝藻藻泥腐熟进程及微囊藻毒素(MC)降解速率的影响。结果表明,堆肥过程中各处理间的pH、总碳量及其形态、总氮量及其形态、总磷含量、总钾含量、种子发芽指数差异显著。与蓝藻自然堆置相比,添加辅料增加堆体C/N可提高蓝藻的腐熟速度。堆肥35d后,T2和T3处理的堆肥成品均已满足有机肥行业标准,种子发芽指数均高于80%;但MC-LR和MC-RR仍有较大的降解潜力,从无害化的角度考虑,蓝藻高温堆肥时间不应少于50d。C/N过高增加了氮素的损失,如何进一步降低氮素的损失,提高堆肥过程中MC的降解将是今后蓝藻堆肥研究的重点。
In order to explore and optimize the process parameters of aerobic composting of dewatered cyanobacterium algae sludge, using composting reactor, the effects of 5 (T1), 15 (T2) and 25 (T3) Maturity process and microcystin (MC) degradation rate. The results showed that there were significant differences in pH, total carbon content and its morphology, total nitrogen content and its morphology, total phosphorus content, total potassium content, and seed germination index among the composting treatments. Compared with the natural stacking of cyanobacteria, adding excipients to increase the reactor C / N can improve the decomposition rate of cyanobacteria. After composting for 35 days, the compost products processed by T2 and T3 all met the industry standard of organic fertilizer, and the seed germination index was higher than 80%. However, MC-LR and MC-RR still had great potential for degradation, Consider, cyanobacteria composting time should not be less than 50d. C / N is too high to increase the loss of nitrogen, how to further reduce the loss of nitrogen, and improve the degradation of MC in composting process will be the focus of future research on cyanobacteria composting.