Background significance of the project
"White pollution" is a worldwide problem. In 2017, China's agricultural film production was 2.6 million tons. According to statistics, 580 million mu of plastic film mulched land in China is suffering from serious damage of "white pollution", including 390 million mu of plastic film covering field and 190 million mu of fruit tree mulching. The content of plastic residual film in the most serious area is as high as 30-40kg / mu, which is equivalent to laying 10 layers of plastic film in each mu of soil, resulting in soil hardening and poor air permeability, leading to large-scale crops Reduction of production. So far, there is no 100% biodegradable, safe and effective substitute for plastic mulching film in the world.
In recent ten years, the outbreak of Enteromorpha prolifera has brought serious disasters to the coastal ecological environment. The salvage and processing of Enteromorpha prolifera have lost a lot of human, material and financial resources of the government, and have brought immeasurable losses to aquaculture and tourism. Under the background of frequent occurrence of Enteromorpha and "white pollution" of soil caused by plastic mulching film, Professor Xu Jiachao from the Research Office of seaweed chemistry and application, Ocean University of China, after nine years of scientific research, has prepared a fully biodegradable seaweed film from seaweed (Enteromorpha prolifera), which can effectively replace the traditional plastic film.
The total biodegradable seaweed (Enteromorpha prolifera) mulching film, with a domestic market value of about 100 billion, has a broad development prospect and a huge application market. In the next 10 years or more, the whole biodegradable biofilm industry will be the breakthrough point to solve the global "white pollution" problem.
Advantages of industrialization
1. Abundant raw materials.
The total output of algae culture in the world is 30.139 million tons (fresh weight), while that of China is 14.387 million tons (fresh weight), accounting for 47.9% of the total output. The total output of algae mariculture in China is 2.169 million tons / year (dry weight), including 1.461 million tons of kelp, 530000 tons of dry kelp and 200000-500000 tons of dry Enteromorpha in Shandong Province. Using seaweed (Enteromorpha prolifera) as raw materials, the biodegradable plastic film can not only solve the problem of "white pollution" of soil, but also solve the outbreak of Enteromorpha, and realize the comprehensive utilization of seaweed resources.
2. Leading technology in the world.
At present, it has 5 national patents and 6 international papers. Seaweed film has six advantages
① 100% biodegradation, 6-12 months degradation to organic seaweed fertilizer.
② The film can be mechanically laid with high strength and flexibility.
③ There is no need for recycling and zero pollution, and it can be turned over directly.
④ The comprehensive cost is low, 20-50 yuan / mu lower than plastic film.
⑤ It can inhibit the growth of weeds and reduce the use of pesticides.
⑥ Complex soil heavy metal, repair soil environment.
3. Huge market demand.
In 2017, China's state-owned plastic film mulching output value will reach 260.5 billion tons, and the plastic film mulching market will reach 260 million tons in 2017.
4. National policy support.
Food packaging is an important part of modern food industry and occupies a huge consumer market. However, the safety and environmental problems caused by petroleum based plastic preservative film emerge one after another, which makes people pay great attention to the preparation of a new type of safe and environmental protection film. In this project, sodium alginate is used as the main raw material, and the double ion cross-linking technology is used to prepare a new type of fresh-keeping film with rich sources, safety, non-toxic and biodegradability. It provides theoretical basis and technical support for edible preservative film, and is expected to partially or completely replace plastic preservative film in the near future, which will contribute to the construction of resource-saving and environment-friendly society in China.
Harm of traditional preservative film
State authorized invention patents, world leading technology, technical barriers are very high, difficult to copy!
Social pain points
Medical poison capsule incident
On April 15, 2012, CCTV exposed the use of leather leftovers to make pharmaceutical capsules by illegal manufacturers.
After testing, 13 batches of drugs from 9 pharmaceutical factories were corrected, and the content of chromium in capsules exceeded the standard, which seriously harmed the health of consumers.
High safety: marine plant polysaccharides, no heavy metals;
Accurate drug release: accurately located in the small intestine to release;
The quality is stable: alginate has bacteriostasis and does not breed microorganism;
High bioavailability: reduce the cost of medication by more than 60%;
Meet the requirements of special culture and religious belief.
Technical level: international leading
The seaweed slow-release organic fertilizer was prepared from kelp extract and compound amino acid as nitrogen source, which was suitable for soilless cultivation. It is rich in nutrients such as nitrogen, phosphorus, potassium, calcium, magnesium and phosphorus, among which the unique sodium alginate and seaweed oligosaccharide can be sustained released in the plant growth period according to the plant growth law, meet the nutritional needs of the whole growth period of the plant, reduce the nitrate content in the plant, increase the nutritional value, and promote the growth of plants significantly.
Seaweed water ball
Algal water polo is based on sodium alginate as a substrate, through the spheroidization technology and gel technology to wrap drinking water, and produce water balls which can be eaten directly. Seaweed water ball is biodegradable and has good biocompatibility. The project solves the problem of heat shrinkage of alginate gel, and the packing material of seaweed water polo is edible and degradable. It helps to improve the current environmental pollution and resource shortage, and can eliminate the potential harm of disposable plastics to human health. It will contribute to the development of biodegradable and economic materials, and has far-reaching significance for the development of environment-friendly society.
Since the "plastic restriction order" was issued in the middle of 2008, all walks of life have taken some actions according to it. However, under the background of rapid economic development, the use of plastic products in China is still increasing, and the total amount is huge. Now, the national development and Reform Commission and the Ministry of ecological environment jointly issued the "opinions on Further Strengthening the control of plastic pollution" on January 19 this year, which specifies the regulatory objectives from 2020 to 2025 in detail, which is known as the enhanced version of the "new plastic restriction order".
In our daily life, it is not difficult to find that McDonald's, Starbucks and other fast food and beverage industry brands have begun to convert plastic straws into paper straws and direct drink cup lids. It can be seen that environmental protection straw has attracted the attention of the state and the industry, and will continue to be concerned in the future.
Our seaweed straw products, raw materials from the sea, vast resources, safe and pollution-free. The seaweed straw obtained by ion crosslinking technology is closer to the appearance and properties of plastic straw, which can reduce consumers' discomfort, realize the effective replacement of plastic straw, improve the utilization rate of marine resources and promote the application of marine resources in a wider range of fields.