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Anonymous users2024-02-10The amount of contaminants in the feces excreted by a pig each year.
About 10 times more than a poultry emits.
The reporter learned from the Municipal Animal Husbandry and Veterinary Bureau that compared with chicken and duck breeding, the content of pollutants in the feces excreted by each pig is about 10 times that of each poultry discharged, and the area and degree of water pollution caused by it are correspondingly more serious, and the annual consumption of chemical oxygen demand and biochemical oxygen demand for each pig is about 20 times the amount required for each poultry.
Chemical oxygen demand (COD) and biochemical oxygen demand (BOD) are one of the basic comprehensive indicators of water quality monitoring, and the higher the value, the more serious the pollution of the water body. The annual fecal pollutant content of each pig is mainly ammonia nitrogen (NH4-N), total phosphorus (TP) and total nitrogen (TN), if these elements exceed a certain self-purification capacity of the water body, it will lead to water odor, water eutrophication and environmental degradation. Tmall USA Puwei Xin Tips:
Remember to take precautions when traveling in hazy weather.
The cost of sewage treatment for pigs is 10 times that of human sewage.
How serious is the pollution caused by the discharge of sewage from livestock and poultry farming? The staff of the reservoir area management office of the Shanxi Water Conservancy Hub Management Bureau told reporters that if it is a pig farm direct sewage, the water flowing out is black and smelly, and the water quality is lower than the inferior class V. Everyone is responsible for protecting the environment, and the United States imports Guard, Xintian, and cats to effectively prevent haze.
According to reports, a pig needs to be cleaned with 25 kilograms of water a day, and it takes at least 6 yuan to treat 1 ton of sewage to achieve the standard discharge, and about 1 ton of domestic sewage is treated, and the cost of sewage treatment of pigs is equivalent to 10 times that of human sewage. For farmers, taking 100 pigs as an example, a day needs to treat tons of domestic sewage, the cost is about 15 yuan, which is a large amount of expenditure, and requires a certain amount of technology, which also leads to many farmers secretly draining and discharging aquaculture sewage.
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Anonymous users2024-02-09The requirements for the development of the information industry are that the air quality is good, and that rain, high temperatures, and rivers are not enough.
The information industry refers to the industry that specializes in producing, collecting, sorting, and transmitting information, and manufacturing various information equipment. There are two types: broad and narrow. The information industry in the narrow sense refers to the industry that is directly related to electronic computers.
Including computer research and manufacturing, programming and other industries. The information industry in a broad sense refers to publishing, printing, news, broadcasting, communications, advertising, etc., as well as the industries included in the above-mentioned narrow sense information industry. Western futurists believe that the information industry will be the pillar industry of the information society (or post-industrial society).
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Anonymous users2024-02-08The information industry involves electronic products, and its components are relatively squeamish, and the air is high, so it is not good to have rain, high temperatures, and rivers.
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Anonymous users2024-02-07Materials, energy, information three pillar industries.
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Anonymous users2024-02-06Log in to the Electronics Industry Vocational Skills Appraisal and Guidance Center**.
You can query in the certificate query area!
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