[1]ZHU Quan-wen.Distribution Characteristics of Heavy Metals in Feeds, Pig Manures and Biogas Slurry[J].Research of Soil and Water Conservation,2014,21(06):284-289.
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Distribution Characteristics of Heavy Metals in Feeds, Pig Manures and Biogas Slurry
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
21
Number of periods:
2014 06
Page number:
284-289
Column:
Public date:
2014-12-28
- Title:
- Distribution Characteristics of Heavy Metals in Feeds, Pig Manures and Biogas Slurry
- CLC:
- X713
- DOI:
- -
- Abstract:
- In the intensive animal production, more and more trace elements such as Cu, Zn were added in the feeds of animals to prevent disease, there will be potentially environmental risks caused by the manure-born metals because of the low rate of utilization of livestock and poultry to heavy metals and the high residue in feces. Samples of pig feeds, pig manures and biogas slurry were collected to analyze the characteristics of heavy metal pollution (Cr, Mn, Co, Ni, Cu, Zn, As, Cd, Pb) in feeds-manures-biogas system in the west coast region of Taihu basin. The results show that the heavy metals in pig feeds and manures severely exceeded the limits in Taihu Lake Basin, mainly Cu, Zn, Pb, Cd and As, different stages of the rearing are quite different. Heavy metals seriously exceeded in biogas slurry, in which Cu, Zn, As contents were 3.37, 34.49, 0.36 mg/L, respectively. Cu, Zn, Pb, Cd and Ni are the excessive metals in biogas residue, reaching to 1 348.20, 10 525.03, 1 254.45, 57.36 and 1 043.99 mg/kg, respectively. Except for Pb，Cd and Co, the contents of soluble heavy metals increased in anaerobic fermentation process, which cannot be directly applied to agricultural land, need follow-up treatment to reduce heavy metal pollution, so it can provide the scientific basis for harmless use of livestock and poultry manure.
- References:
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