| 汪晶晶,邓威,方梦萦,李玉成,吴涓,张学胜,王宁.水分含量对蓝藻堆肥腐熟及藻毒素含量的影响[J].农业环境科学学报,2020,39(2):403-410. |
| 水分含量对蓝藻堆肥腐熟及藻毒素含量的影响 |
| Influence of water content on the maturity and content of microcystin in cyanobacteria composting |
| 投稿时间：2019-08-21 |
| DOI：10.11654/jaes.2019-0920 |
| 中文关键词: 蓝藻 好氧堆肥 腐殖质 微囊藻毒素 |
| 英文关键词: cyanobacteria aerobic composting humus microcystin |
| 基金项目:国家科技重大专项（2017ZX07603-002-001） |
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| 摘要点击次数: 3084 |
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| 中文摘要: |
| 为探索和优化开放环境中蓝藻堆肥的腐熟化、无害化处理工艺参数，以蓝藻为原料，菌渣和稻壳为调理剂进行好氧堆肥，研究了初始含水率为50%（W50%）、55%（W55%）和60%（W60%）的处理对堆肥腐殖化进程及微囊藻毒素（MC）降解速率的影响。结果表明：堆肥48 d后，各处理成品均已满足有机肥标准，种子发芽指数高于85%；3种含水量条件下，腐殖质含量分别下降23.16%、21.71%和19.50%；胡敏酸含量分别提高69.40%、60.58%和43.89%；富里酸含量分别下降50.30%、50.09%和40.36%；腐质化系数（胡敏酸/富里酸）分别为2.85、2.94和2.23，增幅为141.27%~240.81%。堆制48 d，MC-LR和MC-RR含量均低于1 μg·kg-1，降解率高于95%；各处理组中，MC-LR和MC-RR降解速率变化趋势相似，且MC-RR的降解速率高于MC-LR。研究表明，W50%和W55%处理有利于形成腐殖类物质，提高堆体腐熟度，W55%处理MC的降解效果最好。 |
| 英文摘要: |
| To explore and optimize the process parameters of decomposition and harmless treatment of cyanobacteria, outdoor composting was conducted, in which rice husk and mushroom residue were used as stuffing. The objective of this study was to analyze the composting speed and degradation of microcystin(MC), where the initial water content(50%, 55%, and 60%)was added during composting. Results showed that the total nutrient content met the requirements of the national industry standard of organic fertilizer after 48 d of composting of cyanobacteria. In addition, the germination index in these treatments was more than 85%. At the end of composting for all three treatments, the humus carbon content decreased by 23.16%, 21.71%, and 19.50%, the humic acid carbon content increased by 69.40%, 60.58%, and 43.89%, and the fulvic acid carbon content decreased by 50.30%, 50.09%, and 40.36%, respectively. In addition, the ratio of humus to fulvic acid was increased by 2.85, 2.94, and 2.23(ranging from 141.27% to 240.81%), respectively. After 48 d of composting, the MC content decreased by more than 95%, and the content was less than 1 μg·kg-1. The trends in the degradation rates of MC-LR were similar to those of MC-RR, but the rate of MC-RR was higher than that of MC-LR under each treatment. In conclusion, the treatment of W50% and W55% is conducive to the formation of humic substances and improved maturity of the stack. In addition, the treatment of W55% showed the best degradation effect on MC during the composting of cyanobacteria. |
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