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A pig manure composting method that reduces pollutant discharge and increases yield

A technology that discharges pollutants and increases yields. It is applied in the field of agricultural composting, which can solve problems such as few researches, and achieve the effects of low cost, improved maturity, and wide application

Active Publication Date: 2019-10-01
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, little research has been done on the use of woody peat as a compost conditioner

Method used

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  • A pig manure composting method that reduces pollutant discharge and increases yield
  • A pig manure composting method that reduces pollutant discharge and increases yield
  • A pig manure composting method that reduces pollutant discharge and increases yield

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The present embodiment sets 4 test treatments altogether, and the addition ratio of woody peat is 5% (treatment 1), 10% (treatment 2), 15% of the wet weight of material (referring to the total weight of woody peat and pig manure) successively (Treatment 3) and 20% (Treatment 4), the materials need to be fully mixed. All treatments were placed in a closed fermenter with a volume of 20L for high-temperature aerobic composting. This embodiment adopts continuous ventilation, and the ventilation volume is 0.36L / (min·kg -1 DM). The composting cycle is 28 days, and the compost is turned every 7 days. The composting temperature is 55-65°C. Samples were taken at the beginning, turning and end of the experiment to measure the parameters. See the experimental results Figure 1-Figure 4 And Table 2-Table 3.

[0052] see figure 1 , All the treatments with adding woody peat can rapidly increase the temperature and enter the high temperature period, and the time when the temper...

Embodiment 2

[0063] In this embodiment, 4 test treatments are set up: composting adopts continuous forced ventilation, and the ventilation rate is 0.24-0.42L kg -1 DM·min -1 , specifically 0.24 (ie T1), 0.30 (ie T2), 0.36 (ie T3), 0.42 (ie T4) L·kg - 1 DM·min -1 ; The consumption of woody peat accounts for 15% of the mixed material; all the other conditions are the same as in Example 1. See the experimental results Figure 5-Figure 8 and Table 4.

[0064] see Figure 5 , all treatments can successfully start the temperature rise, but T1 and T4 treatments have the shortest high temperature period, both of which are 7 days. The analysis reason is that the ventilation rate is too low and the oxygen supply is insufficient, which affects the microbial metabolic process. However, when the ventilation rate is too high, the pile is not easy to keep warm , have an adverse effect on microbial activity. T3 treatment had the fastest temperature rise, and the high temperature period lasted up to...

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Abstract

The invention discloses a pig manure composting method which can reduce pollutant emission and increase yield. The method includes the steps of adding a certain amount of woody peat to pig manure, uniformly mixing the components, and performing aerobic composting to prepare a pig manure composting product. The method has low cost, wide available range and simple operations. The method significantly reduces emission of polluting gases during the pig manure composting process, wherein emission reducing rate of ammonia gas reaches 63%, emission reducing rate of hydrogen sulfide reaches 89% and emission reducing rate of methane reaches 89%. Meanwhile, content of nutrients in the composting product is increased and quality of the composting product is improved. In addition, the method can increase the composting yield significantly by 23%. The method has great promotion value.

Description

technical field [0001] The invention relates to the technical field of agricultural composting, and more specifically relates to a pig manure composting method that uses woody peat as a conditioner for pig manure composting to reduce pollutant discharge and increase yield. Background technique [0002] With the rapid development of my country's economy and society, the living standards of residents have increased rapidly, and the demand for meat and eggs has also increased rapidly. At present, China's animal husbandry has entered a new stage of development. It is transforming from traditional animal husbandry to modern animal husbandry. The production level of animal husbandry is constantly improving. In 2010, the proportion of large-scale breeding of 50 or more pigs reached 64.5%. The rapid development of the intensification and scale of the livestock and poultry breeding industry has led to a sharp increase in the discharge of livestock and poultry waste. At the same time,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05F15/00C05F17/00
CPCC05F3/00C05F17/00C05F11/02Y02W30/40
Inventor 李国学张地方袁京李赟王国英
Owner CHINA AGRI UNIV