Text/ Aquatic Frontier Li Shuai
China Aquatic Products Channel original report, China's aquaculture industry has developed rapidly for 40 years, creating countless brilliant achievements, with an annual output value of nearly one trillion yuan and an annual output of more than 50 million tons! However, with the continuous expansion of the scale and density of aquaculture and the gradual deterioration of the water environment, China's aquaculture industry has entered a bottleneck and is facing various difficulties.
This has led to the vigorous development of the animal protection industry from scratch and from small to large. According to incomplete statistics, the output value of the animal protection industry in 2019 exceeded 10 billion yuan. Among them, potassium persulfate, known as the "fifth generation of improver", is undoubtedly the most popular product, but the entire industry still lacks a unified standard, and the market is mixed and the barbaric growth of the industry needs to be regulated.
2020 potassium bisulfate industry summit forum site
In order to lead the upgrading of the potassium persulfate industry, on November 19, the China Aquatic Frontier Exhibition was co-organized by China Aquatic Frontier Exhibition and Shanghai Aotu Industrial Co., Ltd., hosted by Aotu (Kaifeng) Environmental Protection Technology Co., Ltd., Aquatic Inputs Branch of China Fisheries Association, Beijing Water Century Biotechnology Co., Ltd., Shandong Jiayuan Environmental Protection Technology Co., Ltd., Lianyungang Yongrong Biotechnology Co., Ltd., Beijing Yujing Biotechnology Co., Ltd., Shanghai Xinruibo Industrial Co., Ltd., and Tianjin Chuangjia Biotechnology Co., Ltd. The 2020 Potassium Persulfate Industry Summit Forum was held.
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Nearly 200 people in the field of aquatic animal protection, enterprise representatives, experts and scholars, farmers, distributors and other industry insiders in dozens of provinces attended the forum to jointly seek the future development of the potassium persulfate industry.
Li Peihong, chairman of Shanghai Aotu Industrial Co., Ltd., delivered a speech
Xing Hua, President of the Inputs Branch of the China Fisheries Association, delivered a speech
Xu Jianfeng, President of the Animal Protection Branch of the China Fisheries Association, delivered a speech
Xu Jianfeng said that at present, the potassium persulfate industry is mixed, and the most concerned issue at present is the authenticity and validity identification of the product, and how to formulate the most effective use methods and standards. In the aquatic animal protection industry, there will be very strict regulatory measures in the future, and safe use of drugs and non-drugs will become the top priority.
Keynote reports
"Application History of Potassium Persulfate in the Field of Aquatic Products"
Li Gang, general manager of Beijing Water Century Biotechnology Co., Ltd
After more than ten years of development, the potassium persulfate (hereinafter referred to as "supersulfur") industry has been deeply rooted in the aquaculture industry, and its effect has been verified by time. At present, supersulfur is mainly used in the improvement of water quality substrate, the main means of prevention and control of fishing diseases in the past is insecticide and disinfection, and the concept of bottoming agent is sought after by farmers as soon as it is proposed.
Water century found that the breeding time is long, poor substrate environment of pond parasites are more likely to reproduce, in many schemes, we found that sulfur is the most preferred, in 1992 the United States DuPont chemical invention of potassium monopersulfate treatment of foot-and-mouth disease and mad cow disease, the domestic around 2000 as a drinking water disinfectant introduction, the domestic sulfur industry from 2007 gradually developed, Beijing Water Century has the industry's first persulfate tablet patent.
When the supersulfur was initially promoted, it was difficult for farmers to have no concept and could not understand, and as the effect was revealed, the sales volume was rising day by 2013, and the frequency of use by farmers in some areas was very high. Under the background of industry attention, media publicity, and corporate admission, supersulfur has quickly become an Internet celebrity for bottom modification. The most at each aquatic product exhibition is the supersulfur products, the competition is becoming more and more fierce, the price is chaotic, the quality is uneven, and counterfeiting is rampant, which has an impact on the further promotion of supersulfur.
Beijing Water Century believes that the use of supersulfur needs to return to the essence of the aquaculture industry, the ultimate purpose of the bottom reform is to make the environment continue to be stable within the optimal growth range of farmed animals, with high-quality supersulfur products, supplemented by quantitative data, so that the diagnosis of science, reasonable use, the results are ideal, so that the use of sulfur is more extensive, farmers really make money, and enterprises can continue to develop for a long time.
Development Direction and Research Progress of Precise Application of Potassium Persulfate in Aquaculture
Joint report of Professor Wang Lei's team from the Institute of Oceanology, Chinese Academy of Sciences & Shandong Jiayuan Environmental Protection Technology Co., Ltd
Persulfur (KMPS) is an effective non-chlorine oxidant, can be completely dissolved in water, can produce reactive oxygen species to remove organic pollutants in the water, because it does not contain chlorine, so it will not produce residual chlorine, the correct application can make the water environment have excellent transparency. Currently, persulcan has some limitations, such as interfering with the determination of residual chlorine and reducing the total alkalinity.
Taking shrimp farming ponds as an example, the maintenance of the oxide layer on the surface of the sediment of the shrimp pond is very important, and the decomposition of organic matter deposited in the sediment consumes a large amount of water oxygen. Pond sediment is also a place for many microbial reactions, continuous breeding for many years of pond sediment aging, farmers attach great importance to bottom reform, generally take biological bottom change and chemical bottom change in parallel, the principle is early bottom change, diligent bottom change, scientific bottom change.
Experimental results of high concentration of acute toxicity and lethal concentration of shrimp persulfurized products: 96 hours semi-lethal concentration of 17.78g/m3, safe concentration of 1.78g/m3 (clear water state), in production practice, the safety of subsulfurization products is very high, basically there will be no drug accidents. Experimental results of improving the substrate effect of supersulfurized products, and appropriate amounts of supersulfurized products can increase the number of beneficial bacteria population.
It is advisable to use a small number of subsulfur products, the breeding effect is obviously better than a large number of times, and the development direction of the future supersulfur products should be the development of new dosage forms, and the evaluation technology of the ecological restoration effect of aquaculture sediment- water body.
"Aquaculture Water Environment Kinetics Research and Application of Potassium Persulfate Products in Aquaculture"
Li Peihong, chairman of Shanghai Aotu Industrial Co., Ltd
From no one to the explosive products in the aquaculture industry, potassium persulfate has come all the way, the topic is continuous, and the heat is not reduced. In 2004, Shanghai approved the first potassium persulfate compound salt production project, injecting a cardiotonic agent into all industry insiders, and the persulfur industry ushered in the spring, making great contributions to the development of green aquaculture.
In 2005, only one pack of raw materials was sold a week, and now an average of one pack is sold in 1 second, and the effect of persulfur products has been deeply rooted in the hearts of the people and has played a non-negligible role in the aquaculture industry. However, at present, the sulfur market is still mixed, the application of products, the development of the industry will encounter various problems, which requires our colleagues in the industry to feel the stones to cross the river, while practicing while solving, can not use the obvious violation of scientific principles of "products" to fool farmers. This forum will surely broaden the vision of the industry, develop new ideas, and make the sulfur industry healthier in the future.
Promoting breeding activities requires energy, different combinations of power to form different breeding models, regardless of which breeding mode, the amount of organic matter carried by the unit of water body is gradually increased during the breeding cycle.
When the water body is eutrophicated, the ammonia nitrogen and nitrite exceed the standard, the oil film appears on the water surface, and the cyanobacteria erupt. This is because the aquaculture industry excessively pursues breeding density and yield, the total nutrient content of water bodies is large, the eutrophication of water bodies is colloidalized, and beneficial bacteria are difficult to survive. Even dissolved oxygen-rich water bodies do not have a strong oxidation capacity.
Want to change eutrophicationic water, only rely on natural and other factors is difficult to achieve, need to change artificially, put in green chemical inputs, oxidants are the best choice, and sulfur is the most ideal oxidant, can improve the redox potential, decompose macromolecular organic matter, destroy water gel particles, and do not affect beneficial microorganisms. Persulfide can oxidize a large number of organic matter, so that the protein denaturation, persulfide itself has the ability to disinfect and sterilize, in aquatic products generally do not need to do disinfectant, because its bactericidal effect is affected by the environment.
At present, the sulfur products on the market are mixed, and there are many general identification methods, and the more professional identification method is X-ray diffraction, which is accurate and reliable.
Guest interaction
Jiang Huojin, chairman of Beijing Yujing Biotechnology Co., Ltd., presided over the discussion session
Zhang Gaofeng, Chairman of Lianyungang Yongrong Biotechnology Co., Ltd.:
Yongrong has done a lot of research in recent years in the aspects of compounding and true and false identification, in terms of true and false identification, persulfur products are acidic products, and supersulfur is unable to identify true and false through a single method. In particular, the production of persulfide pays attention to stability, and there is room for improvement in terms of solubility, storage and transport resistance.
Li Peihong, Chairman of Shanghai Aotu Industrial Co., Ltd.:
The core formulation of potassium persulfate compression tablets is an economically suitable dispersant, and the second is to find a good isolation coating material, which is the key to the success of the compound. In the future application of supersulfur products, we should develop identification means to let the industry de-fake and store the truth, and develop more benignly.
Dr. Lei Wang, Qingdao Institute of Oceanography, Chinese Academy of Sciences:
China's aquatic industry over-sulfur use is large, the use of the effect has been verified over time, but the industry still has many problems, the standard is not uniform, we lack simple and effective detection methods, but also lack of accurate application of methods, from the data to see that sulfur disinfection and sterilization capacity is limited, but in the market publicity, still hype sterilization effect, easy to mislead the market.
The industry is still in the stage of development, every industry has opportunities, I suggest that the sulfur industry should be open-minded, not only limited to the role of bottom reform, and a variety of microorganisms of the compound, absorb new technical means, in order to be inclusive.
Chairman of Shandong Jiayuan Environmental Protection Technology Co., Ltd. Dou Jingtan
In recent years, potassium persulfate compound salt is very suitable for processing, plasticity, safety, fluidity is an important reason for its popularity, we have produced more than 50,000 tons of persulfur tablets, safety accidents are very few, because this product, led to the multi-faceted development of the water quality improver industry, effective chlorine detection shows that the water body can be very stable sustained release, which is of great significance for aquaculture. We and other products such as chlorine dioxide, chlorine dioxide production process to add alkaline substances, but also add sodium chlorite, but sulfuric acid raw materials are controlled, the future supply of raw materials is limited, then chlorine dioxide how to find alternative acid sources? In summary, there is no comparison between different products, and the key also depends on the use effect and cost of farmers.
Jiang Wei, general manager of Shanghai Xinruibo Industrial Co., Ltd
At present, there are many methods for the detection of persulfide products on the market, of which X-ray diffraction is a more accurate means, diffraction can depict the molecular structure of the product, and the detection results at the molecular level will not deceive people. For example, I have jointly sampled more than 80 "supersulfur products" on the market in conjunction with university laboratories, if tested according to conventional methods, many of the persulfur products are qualified, but the use of diffraction to analyze the molecular structure of the product, surprisingly found that nearly 70 products do not contain potassium persulfate, they are mainly sodium persulfate and other components, which shows that the persulfur industry needs an effective detection method to identify.
The supersulfurization industry needs to be repositioned, to see the future of the raw material industry, to see whether the final metabolite of the product is harmful to the environment, the final metabolite of the supersulfur product is potassium sulfate, there is no harm to the environment, and it can also supplement the potassium ions in the water. In fact, in addition to the bottom of the subsulfurization, the supersulfur products have other application surfaces.
At present, the bottoming agent commonly used in water bodies, chlorine products have large side effects and high potential risks. In addition to the bottom of chlorine products, biological bottoming also has many restrictions, the longer the time, the stronger the acidity of the bottom sludge, the activity of beneficial bacteria and the number of populations are limited, the sulfur products combine the advantages of two types of bottoming, as long as they are perfected on the basis, the market capacity of the future sulfur products will exceed 200,000 tons.
【Keywords】:Persulfur products for potassium persulfate aquaculture