Jimu News reporter Lu Chenghan
Correspondent Xu Hui Shu Miao
It looks similar to flies, and likes to eat organic waste such as animal manure and kitchen waste, but it is a beneficial insect - it is the "Wuhan water fly" that has been domesticated by experts. Through its small body, it is converted into high-protein feed and organic fertilizer.
From July 9th to 11th, at the 3rd International Symposium on Research and Application of Water Fly and Microorganism held by Wuhan Huazhong Agricultural University, Professor Yu Ziniu's team and Yuanchuang Environmental Technology Co., Ltd. successfully realized three-dimensional automated breeding of "Wuhan Water Fly" after more than 6 years of production and research docking, and has built 2 mechanized three-dimensional breeding water fly bases, processing more than 260 tons of kitchen waste per day, which has aroused widespread concern among the participants.
On July 10th, Jimu News reporters visited the xianning Jiayu "Wuhan Water Fly" automated breeding base, witnessing the revolutionary method of kitchen waste disposal in Wuhan and the whole process of high-protein feed and fertilizer conversion on site.
Water fly adults
"Wuhan water fly" caught in fishing
Mentioning the "Wuhan water fly", the industry refers to Professor Yu Ziniu of Huazhong Agricultural University, who is 81 years old this year.
Professor Yu mainly studies microbial pesticides, and in order to study, he has bred more than 20 kinds of harmful insects such as cotton worms and small vegetable moths. In July 2004, he went abroad to participate in academic activities, and by chance, his son, a professor abroad, told him that there is a beneficial insect called water fly, which can convert chicken manure, pig manure and other organic waste, and the effect is very good.
Professor Yu Ziniu was moved, went to the field to investigate, and brought a number of insect eggs back to China to prepare for their own incubation and breeding. By this time, Professor Yu learned that there are 3600 species of waterflies in the world, while there are 360 species in China.
At first, due to his lack of experience, he hatched two batches without success. Professor Yu's son sent him back the eggs for the third time, drawing on the experience of not mastering the temperature and humidity in the previous two times, and this time he successfully hatched, thus slowly mastering the growth habits of water flies.
Once, Professor Yu's students invited him to go fishing in the East-West Lake, and in the box containing the earthworms, he found the larvae and pupae of the water flies in the soil. This discovery made him very excited.
He collected the larvae, carefully took them back to the laboratory, and domesticated them. He found that the domesticated batch of water flies had a large amount of food, quick transformation, and could digest a large amount of feces and kitchen waste. "After 40 grams to 60 grams of eggs hatch into larvae, in about 7 days, you can transform 1 ton of chicken manure."
"We finally have our own variety of water fly, I named it Wuhan water fly." Speaking of this interesting experience, Professor Yu's face was full of smiles from time to time.
"Wuhan water fly" realizes automated breeding
On July 10, near the Jiayu County Domestic Waste Landfill, a modern factory building stood out, which was the second "Wuhan Water Fly" automated factory breeding test base of Yuanchuang Environmental Technology Company.
Water fly culture stacks
The first day of the three-volt day is like a sauna day. In the transparent breeding area of the base, the temperature and humidity are very suitable, and they are all regulated by automatic facilities. Through the glass factory, you can see that the stacked breeding tanks are like high and low beds. At this time, after the kitchen waste is screened by the oil-water separation facility, the slurry is formed, and it is slowly transported to the breeding tank through the transmission belt, and the "Wuhan water fly" that looks white and fat is happily "eaten".
"There are a total of 70 stacks here, and 10 stacks of white fat water fly larvae come out of the groove every day." Zhang Fan, head of the black water fly business department of Yuanchuang Environmental Technology Company, told the Jimu news reporter that don't look at the water fly is only about 2 centimeters in size, it may eat it. The 60 tons of kitchen waste oil and water separation of the slurry is about 20 tons, and 4 tons of water fly larvae and 6 tons of insect sand fertilizer are produced.
In the Changshankou breeding base in Jiangxia District, the small "Wuhan water fly" eats 50 tons of slurry (200 tons of food waste oil and water separated substances) a day, and produces 10 tons of water fly larvae and 15 tons of insect sand fertilizer per day. The two bases can consume 260 tons of food waste a day, produce 14 tons of insect protein and 21 tons of organic fertilizer.
Dried water fly
"The white, fat larvae are high in protein and can be used for aquatic products such as crayfish and fish and livestock breeding." If the larvae are dried, they are high-end raw materials in fields such as medicine and health care. Du Ping, chairman of Wuhan Environmental Investment Group, said that the prospect of automated breeding of "Wuhan water fly" is promising.
Water flys will face thousands of tons of wet garbage
Wuhan generates 12,000 tons of domestic waste every day, of which more than 2,000 tons are wet waste including kitchen waste and kitchen waste. At present, the treatment adopted by Wuhan is 4 professional treatment plants and incineration. And this physical treatment, while processing consumes a lot of energy.
Is there a way to use natural and simulated natural methods to deal with wet garbage, so that the cost is low and the effect is good? Wuhan Environmental Investment Group and its subsidiary Yuanchuang Environmental Technology Company have been looking for a good solution.
In 2004, Professor Yu successfully domesticated the "Wuhan Water Fly", which set off a boom in water fly breeding, and tens of thousands of small factories suddenly appeared across the country. Wuhan Huantou Group is also very concerned, and after the contact between the two sides, it reached an intention to cooperate in production and research.
In 2006, Yuanchuang Environmental Technology successfully developed a fully automatic intelligent breeding facility, which enabled workshop-style breeding with greater risk and higher cost to achieve factory breeding. At present, there is a test base in Wuhan and Jiayu County, and the mechanized breeding of water flies has been successful.
"In practice, we have explored a set of successful operating methods and obtained more than 30 national patents." Du Ping said that the factory breeding of "Wuhan water fly", the treatment of kitchen waste is efficient and environmentally friendly, achieving "zero emissions" and stable income.
Wuhan is building a circular economy industrial park, which will treat thousands of tons of wet garbage every day according to the plan, and the project is built and operated by Wuhan Environmental Investment Group. Zhang Fan said the project will also use "Wuhan water fly" to deal with wet garbage.
"White fat people" bring considerable benefits
Zhang Fan, the person in charge of the two breeding and development bases of "Wuhan Water Fly", said that the black water fly is a saprophytic insect, and the larvae usually feed on rotten organic matter such as kitchen waste, animal feces, animal and plant carcasses in the process of growth, and they can efficiently convert some of the garbage produced by humans into their own proteins, which can be widely used in breeding, planting or medical and health care industries.
He introduced that the fully automatic "wisdom fly" equipment developed by the company takes 20 tons of slurry as a unit, and the water fly can "eat" 60 tons of wet garbage every day, which not only achieves "zero emissions", but also produces considerable economic benefits.
Zhang Fan calculated an account, a production unit, can breed 4 tons of white and fat fresh flies and 6 tons of organic fertilizer, which can be used to feed aquatic products such as crayfish, turtles and fish, and can also be used as high-protein feed for chickens, ducks and poultry. The market price is 3,000 yuan per ton, and organic fertilizer can also be sold for more than 400 yuan per ton. The daily gross income of a farming unit reaches more than 14,000 yuan, and the net profit is between 20% and 30%. If the fresh insects are dried, a production unit can produce 1.6 tons of dried insects per day, exported to the international market, each ton can be sold to about 12,000, gross income reached 19,000 yuan.
Professor Yu Ziniu calculated a bigger account for reporters, there are 3.8 billion tons of livestock and poultry manure in the country, if water flies are used to treat 10% of them, the total amount of protein produced is equivalent to replacing 60 million tons of soybean imports.
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