Is pig manure harmful to the human body? What can be raised? What are the techniques of manure treatment in pig farms?

Pigs are covered with treasures, there is no waste, and even pig manure is an excellent fertilizer for agriculture. After the scientific treatment of fertilizer starter, pig manure can be added into high-quality organic fertilizer. Is that pig manure harmful to human body? What can be raised? What are the techniques of manure treatment in pig farms?

Is pig manure harmful to the human body?

Pig manure contains ammonia, hydrogen sulfide and other harmful gases. In addition, the pig manure powder in the pigsty flies into the air and can also form substances that are harmful to the human body; so it is harmful to people in the pigsty for a long time.

What can pig dung breed?

Pig manure can be used to raise fish, maggots, earthworms and so on. It can also be used to grow flowers, vegetables and fruit trees after fermentation.

1. However, livestock and poultry manure contains bacteria and pests such as coliform and nematodes, which can cause crop diseases and insect pests and even lead to crop death when directly applied to farmland, so it cannot be used directly and must be fermented before it can be applied to the farmland. The specific methods are:

2. Mix livestock and poultry manure with straw, sawdust, mushroom residue, etc. (feces account for 80-90%, others account for 10-20%). 1 ton of material (about 2.5 tons of fresh material) plus 1 kg of Gymboree fertilizer starter, 1 kg of Gymboree fertilizer starter plus 5 kg of rice bran (or wheat bran, cornmeal and other substitutes) are diluted and then evenly sprinkled into the material heap, mixed and fermented. Note that it is best not to use "unified bran" with rice bran. The nutrition and ventilation of fresh rice bran is much better than that of old rice bran.

3. During the fermentation process, pay attention to the proper supply of oxygen and turn the pile, the temperature is controlled at 55-65 ℃, too high temperature has an effect on nutrients. The moisture content of fermentation materials should be controlled at 60% to 65%. Too high and too low are not conducive to fermentation, too little water, slow fermentation; too much water will lead to poor ventilation, slow heating, and produce bad smell. The method of adjusting material moisture: too high moisture can add straw, sawdust, mushroom residue, dry soil powder and so on. The method to judge whether the moisture is appropriate or not: hold on to a handful of material, see the watermark in your fingers, but do not drip, and then disperse when you land.

4. The whole fermentation process can complete complete deodorization, fermentation ripening, insecticidal and sterilization in 5-7 days. The finished organic fertilizer is fluffy, dark brown, slightly alcoholic or earthy, rich in nutrition, safer and more convenient to be applied to farmland, and can be used in nutritious soil for melons, fruits and vegetables, cash crops, seedlings and flowers with higher value-added.

What are the techniques of manure treatment in pig farms?

In recent years, large-scale pig farming has developed rapidly. at present, the proportion of large pig farms with 500 basic sows and more than 10,000 pigs per year is increasing rapidly, the proportion of traditional free-range pigs in rural areas is rapidly decreasing, and the process of pig industrialization is obviously accelerated. large-scale and intensive pig-raising enterprises are increasing year by year, which will be the inevitable trend of the development of pig industry in the future. At the same time, large-scale and intensive pig farms or breeding areas cause pollution to the soil, atmosphere, water sources and other environment. The treatment technology of pig farm manure includes static composting of pig farm manure and anaerobic fermentation of pig farm sewage.

1. Multi-stage static aerated composting of pig farm manure. Pig manure was treated by multi-stage static aerated composting, which included composting material storage workshop, high temperature fermentation workshop, medium temperature post-ripening workshop and composting deodorization workshop. The manure collected by the pig farm every day is mixed with auxiliary materials according to the appropriate proportion and stored in the composting material storage workshop. After 7 days, the manure mixture is transferred to the high temperature fermentation workshop for the first week of fermentation. One week later, it is transferred to the next high temperature fermentation workshop for the second week of fermentation, and so on. After 4 weeks of high temperature fermentation, the compost mixture is transferred to the medium temperature fermentation workshop for post-fermentation. A month later, the compost of pig manure can be produced when it is transferred to the second medium temperature workshop and then ripened for a period of time.

2. Farmland utilization technology after anaerobic fermentation of pig farm sewage. After anaerobic treatment of pig farm sewage, the anaerobic effluent can be dried directly, and the dried solid can be used as organic fertilizer in agriculture. The anaerobic effluent can also be directly used as liquid fertilizer to plant crops, forages, vegetables and fruit trees through pipes laid in the field or using liquid fertilizer application equipment. The anaerobic effluent used as liquid fertilizer, in which there should be no live Schistosoma japonicum eggs and hookworm eggs, the sedimentation rate of Ascaris lumbricoides eggs is more than 95%, and the value of fecal coliform is 10: 10. The application amount of liquid feces should be determined according to soil fertility, crop species and expected target yield, and combined with the nitrogen and phosphorus nutrient content in the anaerobic effluent, it should not be overapplied to avoid environmental pollution caused by fertilization.