农业环境科学学报2012，Vol.31Issue(10)：2031-2038,8.
C/N对蓝藻好氧堆肥腐熟及无害化进程的影响
Influence of C/N Ratio on the Composting Effect and Secure Utilization of Cyanobacteria
摘要
Abstract
The efficient collection of cyanobacteria is an effective way to reduce the amount of cyanobacteria and its risk of bloom again. Aerobic composting of dewatering cyanobacteria by collection could change waste into resource. However, the residue of microcystins (MC) after aerobic composting should be considered in view of its application safety. To explore and optimize the aerobic composting technology of de-watering cyanobacteria, an composting using aerobic composting reactors was conducted, in which 5(T1), 15(T2) and 25(T3) C/N ratio were installed during the composting. The objective of this study was to analyze the composting speed and the degradation of MC in dewatering cyanobacteria. Results showed that pH, contents of carbon, nitrogen, phosphorus and potassium, germination index were significantly (P< 0.05 or 0.001) different between the three treatments. The composting speed significantly enhanced in treatments of T2 and T3 compared with treatment of T1. After 35-d composting of cyanobacteria, the total nutrient content in T2 and T3 treatments met the requirement of the national industry standard of organic fertilizer. Meanwhile, the germination index in those treatments were more than 80%. However, the degradation potentials of MC-LR and MC-RR were still high after 35-d composting. For the secure utilization purpose, the high temperature composting time of cyanobacteria should be more than 50 days. Nitrogen loss would be larger with C/N ratio of the materials of composting. The research hotspots were to reduce nitrogen loss and to enhance the degradation of MC during the aerobic composting of dewatering cyanobacteria.关键词
蓝藻/好氧堆肥/C/N/腐熟/微囊藻毒素降解Key words
cyanobacteria/ aerobic composting/ C/N/ composting speed/ degradation of microcystins分类
农业科技引用本文复制引用
江君,靳红梅,常志州,杜静..C/N对蓝藻好氧堆肥腐熟及无害化进程的影响[J].农业环境科学学报,2012,31(10):2031-2038,8.基金项目
国家支撑计划项目(2009BAC63B02) （2009BAC63B02）
