城市食物生产与消费系统磷代谢研究

研究运用物质流分析方法,构建基于物质代谢过程的城市食物生产与消费系统磷代谢分析框架,即追踪以"食物生产"、"食物加工"、"居民消费"、"废物处置"为主要过程的磷代谢路径,解析磷代谢主要过程机制并提出相应的核算方法;在此基础上,以合肥市食物生产与消费系统为例进行了案例研究.结果表明,2008年合肥市食物生产消费系统磷的总...

Phosphorus Flow Analysis of Civil Food Production and Consumption System

With the method of substance flow analysis(SFA), the study provided an analytical framework for phosphorus cycle on civil food production and consumption system that was demonstrated by four life stages-food production, food processing, consumption and waste handling. Furthermore, a case study was carried out in Hefei City, for the year 2008. The SFA results show that the total demand of phosphorus reaches 5475.86 t in the food production and consumption of Hefei City in 2008; approximately 242.57 t P leaves the system, and around 1710.84 t P is emitted via waste discharge to the surface water, the rest is transformed as the stocks in the system. The effluent of excessive fertilizer in agriculture plays an important role for the huge phosphorus load, as well as the civil sewage. In the end, the study provided some suggestions on improving the use efficiency of phosphorus and reducing phosphorus discharge into surface water.