湖南省畜禽养殖污染年排放量调查分析

苏丁丁; 曾建国; 伍小松; 曹满湖

湖南省畜禽养殖污染年排放量调查分析

Investigation and Analysis on Present Condition of Livestock Excrement and Urine Pollution in Hunan Province

摘要

摘要: 以2000-2008年湖南省畜禽饲养量数据为基础,对湖南省畜禽粪尿年排放量进行统计,计算出粪尿污染物排放总量及污染物流入水体总量,并对养殖场排污水取样检测汞、砷、铜、锌金属离子的浓度和大肠杆菌、悬浮物、pH值。结果显示:湖南省2000-2008年间畜禽粪尿平均排放量达1.23×108t;化学耗氧量、生化耗氧量、氨氮、总氮和总磷排放量分别为2.95×106t、2.64×106t、2.75×105t、1.85×105t和6.54×105t;化学耗氧量、生化耗氧量、氨氮、总氮和总磷水体流失量分别为:3.63×105t、2.58×105t、6.22×104t、2.19×104t和1.56×105t,养殖场所排废水中以铜最高,锌、汞含量次之,未检出砷,4种金属元素在污水中平均含量分别为:铜0.18 mg/L,锌0.06 mg/L,汞0.05 mg/L,砷0 mg/L,大肠杆菌和悬浮物的平均含量均超过国家允许标准1.60倍(P<0.05)和12.78倍(P<0.01)。本文针对湖南省粪尿污染所处负荷状态,提出了相应的防控措施。

Abstract: Average emissions of animal feces and urine from 2000 to 2008 were calculated based on the amount of livestock and poultry in Hunan Province. Take the polluted water collected from livestock farm as samples to analysis the contents of Hg, As, Cu, Zn or e-coli, suspended matter, pH, for measuring the quality of wastewater. It showed that: average emissions of animal feces and urine from 2000 to 2008 was 1.23×108t, the value of chemical oxygen demand (COD), biochemical oxygen demand (BOD), NH3-N, total nitrogen (TN) and total phosphorus (TP), respectively is 2.95×106t, 2.64×106t, 2.75×105t, 1.85×105t and 6.54×105t. Loss amount of COD, BOD,

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