According to Binh Dinh Fisheries Sub-Department, in this province, many shrimp farming areas under the extensive farming method, the environment in the cultured water areas is seriously polluted, because the farming area has not been properly planned, which is the main cause of the epidemic. shrimp disease. In fact, the planned shrimp farming areas in Binh Dinh are few, and the spontaneous shrimp farming areas with weak infrastructure are many. The extensive shrimp farming areas do not have a separate water supply system into the pond and a separate wastewater discharge system, most of them only have one pond and then discharge it directly into the environment, leading to infectious pollution. lan. In the context of seriously polluted farming water, causing continuous diseases for shrimp, many whiteleg shrimp farming households in the form of intensive and semi-intensive farming in Phu My district (Binh Dinh) have filtered water before put in ponds. Contamination of culture water is the main cause of disease for shrimp. Photo: Vu Dinh Thung. The filter tank is built of cement bricks with a width of 6m, a width of 4m, and a depth of 2m. Underneath the tank is a layer of coral rock, followed by a layer of activated carbon and a thick layer of sand on top. Water is pumped from the underground circuit into the filter pond and then discharged into the pond with a large plastic pipe. Pump and filter continuously until there is enough water in the pond. After being filtered, the water is clear, when entering the pond, there is little change in algae. Every 3-5 months, shrimp owners have to change the sand and coal layer once. The 1-year coral layer must also be removed, scrubbed clean and then put back in the tank to avoid contamination of the culture water from the scum in the filter tank. The model of using water filter tanks for shrimp farming has been applied by many whiteleg shrimp pond owners in My An commune (Phu My district). Breeding fish in a dual-effective shrimp pond For shrimp farmers in Hoai Nhon town (Binh Dinh), raising mullet in shrimp ponds to help the fish clean the pond environment, both to limit environmental diseases on shrimp, and to earn more income from fish. . According to Mr. La Dong Quang in block 2, Tam Quan ward (Hoai Nhon town, Binh Dinh), one of the three pioneers in raising mullet in shrimp ponds has degraded in the model developed by the Binh Dinh Agricultural Extension Center. deployed with an area of ​​12,000m2, the number of mullet fingerlings stocked is 12,000 with the size of 200 fish/kg. After 8 months of stocking, the results showed that the fish grew well, the survival rate reached nearly 90%, the average weight reached 2-3 fish/kg, the estimated yield was more than 4.8 tons. Mullet has delicious meat, is popular with consumers, so the output is very generous. Mr. Pham Van Chay, a shrimp farmer in Dong Dien hamlet, Phuoc Thang commune (Tuy Phuoc district, Binh Dinh) releases monotypic tilapia into shrimp ponds to clean the pond environment. Photo: Vu Dinh Thung. According to Mr. Do Minh Quang, Deputy Director of Binh Dinh Agricultural Extension Center, farming households must manage environmental factors during the farming process; regularly monitor watercolor, identify environmental factors, monitor environmental factors. Monitor the health and pathology of the mullet fish to take timely measures. The water level in the pond is always maintained above 1.2 m, the amount of water changes from 20-30%/time, the time of water change depends on the level of pollution in the pond. Use aerators and aerators to maintain optimal dissolved oxygen levels in the pond, especially after sunset. In the first time of the farming process, only run the fan in the evening, when the fish are large, depending on the total weight of fish in the pond, adjust the running time of the fan accordingly. The shrimp’s food is always left over at the bottom of the lake, when the aerator runs aeration, the excess food pops up, the mullet fish just like that, so they can take advantage of the fine food source, and the fish will grow faster. Photo: Vu Dinh Thung. “Especially, mullet is omnivorous, the main food is organic detritus. This feature is very beneficial for cleaning degraded shrimp pond environment. In addition, the technique of raising mullet is not difficult, there are few diseases, so the survival rate is high. Breeding mullet interspersed with shrimp at a ratio of 1/4 will bring double profits on the same area, and at the same time reduce the time and cost of fish feed. Because the shrimp’s food is always left over on the bottom of the lake, when the aerator runs on the aerator, the excess food expands, the fish just keep on snapping, so they can take advantage of the refined food source, and the fish will grow faster. Breeding mullet in degraded shrimp ponds has given double results, both cleaning the environment in the pond to ensure safe shrimp growth and creating more income for farmers,” said Mr. La Dong Quang, farmer. mullet in a shrimp pond in Hoai Nhon town shared. In the shrimp farming area in the direction of biosecurity in Dong Dien village, Phuoc Thang commune (Tuy Phuoc district, Binh Dinh), in the shrimp ponds, tilapia can be stocked with the density of 1 fish/2m2 so that they to clean the pond bottom and ensure the water source for farming. “Tilapia not only gradually eat waste at the bottom of the pond to help limit pollution, but the slime layer of the fish also secretes substances with biological effects to kill harmful bacteria of shrimp, balancing the ecology in the pond. Thanks to that, shrimp farming in Dong Dien in recent years has not been harmed by diseases, farmers are profitable,” said Pham Van Chay, who has 4,500m2 of water surface area for whiteleg shrimp farming in Dong Dien village. shall.

Protection of the world’s oceans Hope for the “Blue Economy”

As of: 06/08/2021 12:59 p.m.

The seas are at risk from climate change, pollution and overfishing. But gradually a rethink is also beginning in the economy – the protection of the oceans is recognized as a business. From Notker Blechner, tagesschau.de Sometimes an accident can lead to a complete change in life. For example with Emily Penn. The architect and passionate sailor had her aha experience on a boat trip from Great Britain to Australia. “One night all the passengers woke up to a loud bang,” she says. “Our ship had rammed a plastic mountain – in the middle of the ocean, away from any civilization.” Since then, Penn has been committed to protecting the oceans, giving lectures, organizing events and doing research expeditions to find solutions to the fight against the plastic flood in the oceans. Penn is known as the “advocate for the seas”.

Shoes, sunglasses and backpacks made from ocean trash

The marine activist is encouraged by increasing business initiatives against plastic waste pollution in the oceans. Several companies and start-ups have developed methods of making new products from marine litter. Adidas offers shoes and jerseys made from recycled “ocean plastic”. Other manufacturers are making new sunglasses, backpacks and skateboards out of marine plastic waste. Even the Dutchman Boyen Slat, founder of the start-up “Ocean Cleanup”, now sells sunglasses with frames made from recycled ocean plastic. “Ocean Cleanup” collects plastic waste on the open sea with ships. The Italian Giulio Bonazzi has managed to make a special fiber – Econyl – from old fishing nets, which is used for tights and bikinis. Bonazzi calculates that every ton of Econyl saves six tons of carbon dioxide.

Marketing gimmick?

Environmentalists warn against being misled. Products made from ocean plastic are often a marketing gimmick and misleading. In some of them there is hardly any plastic waste from the oceans, according to the WWF. Nevertheless: The fight against the mountains of plastic has now begun in business and politics. The G20 states have announced that they will ban plastic waste from the world’s oceans by 2050. It is currently estimated that around 13 million tons of plastic waste end up in the oceans every year.

14 coastal countries are leading the way in marine protection

The pictures of polluted beaches after tankers leaked like now back in Sri Lanka show how important global marine protection is. A total of 14 countries, including Australia, Canada, Japan, Indonesia, Mexico and Norway, have come together in a kind of “Ocean Panel” and have committed to sustainably managing their national waters in the future. “For too long we have made the wrong choice between marine protection and production,” admits Norway’s Prime Minister Erna Solberg, co-head of the Ocean Panel.

Danger to the species: A sea turtle that has become entangled in a drifting net. Image: picture alliance / AP Photo According to a study that was published in the journal “Nature” at the end of March, hundreds of millions of CO2 could be saved through marine protection. So far, not even three percent of the world’s oceans have been strictly protected. The study’s authors see the greatest potential in restricting bottom trawling. This controversial fishing method involves ships pulling a net across the ocean floor. The living beings on the ground are destroyed, plants are uprooted and spawning grounds for fish are destroyed. In addition, the agitation of the seabed releases organic carbon compounds and converts them into climate-damaging CO2.

Great potential for CO2 savings

The Ocean Panel has proposed several measures to promote marine and climate protection: In addition to carbon storage in the seabed, the panel recommends sustainable fishing and aquaculture, the expansion of offshore energy in the sea and ocean-compatible transport. According to calculations, this could reduce carbon dioxide emissions by a fifth, trigger investments of over 15 trillion dollars and create 12 million new jobs. Indeed, there is a gradual rethinking of the maritime economy. The International Maritime Organization has mandated stricter sulfur emissions values ​​in 2020. Instead of using heavy fuel oil, the ships now have to run on marine diesel. The only exception: ships with so-called scrubber exhaust gas cleaning systems are still allowed to use heavy fuel oil. Over 350 container and cruise ships as well as tankers have switched to liquefied natural gas (LNG). LNG contains no sulfur, hardly any nitrogen oxides and 20 percent less CO2. However, the greenhouse gas methane allegedly escapes. “The liquefied natural gas turns out to be a harmful wrong path,” says Nabu in the meantime. Shore power systems have been put into operation in Rostock-Warnemünde and Hamburg so that cruise ships do not need the ship’s diesel for power supply while they are in port.

“Blue Economy” becomes a billion dollar business

Investors such as the DWS fund company from Deutsche Bank have long been interested in the “blue economy”. According to the WWF, the ocean’s annual “gross sea product” is $ 2.5 trillion. This would make the “blue economy” the eighth largest economy in the world. DWS fund manager Paul Buchwitz predicts that the “blue economy” will grow twice as fast as the established economy by 2030. The “blue economy” includes companies that help to reduce marine pollution and curb ocean acidification – as well as those that deal with the sustainable use of marine resources, ecosystems and sustainable fisheries.

A new “tourist” destination between the capital has potential risks of unsafety and environmental pollution Witnessing these images, Mr. Cong, an “aboriginal” of Long Bien ward, was upset, shaking his head: “Only when an incident occurred, the other guests knew they were joking with death. Subsidence of sand or indentation of swirling waters is the risk of happening at any time ”. The people’s need for entertainment, entertainment and relaxation during the holidays is very legitimate. In terms of space, the area in the middle of the Red River seems to meet that need; because it is near the center, because there is a cool Red River; There is a large land, open to thousands of square meters, spoiled for playing without “touching” anyone. That’s why the phenomenon happened a long time ago, when there are several hundred and thousands of people every day, vehicles, even motorbikes, cars, just follow the border gates in Long Bien, Bo De, Thach Ban. …to enter. Gathering activities take place from morning to night, even through the night. Then, after each fun, the environmental “disaster” stayed in the middle beach. Not many groups and families consciously clean up garbage before leaving. People put in place. People do not mind… throw garbage into the river. “There used to be local people who had to worry about the polluted landscape in the middle yard and moved out. But that was only the first time, when there were few visitors elsewhere. Now I have … “, Mr. Cong sadly. Bringing the question of the “mixed” pollution above to the Long Bien Ward Committee, we only received a shake of our head. Because, there are no regulations or sanctions to prevent people from going to the beach to gather and play. Having “cornered” all the contingent of ward cadres, grassroots cadres to remind and propagate, just like… salt left the sea. The beach in the middle of the Red River needs to be “saved”, and “saved” as soon as possible! But to whom is that responsibility of the rescue? Once again, the question should be sent to the People’s Committee of Long Bien District, especially when the holidays are approaching April 30, May 1.

Illustration. https://kinhtexaydung.petrotimes.vn The cost of pollution in Europe has risen by more than 50% this year, signaling that climate policies need to be harsher, the region is also starting to make a difference. Futures in the carbon market of Europe, the largest market in the world, exceeded $ 60 / ton for the first time on May 4. Rising prices make it more expensive to release carbon dioxide into the air and force the industry to look for cleaner ways to run production. According to Ulf Ek, investment director at London’s Northlander Commodity Advisors LLP, the bulls have to go further. He hopes the futures contract will trade as high as $ 91 / ton by the end of the year, to boost his incentive to protect the environment. The rise in prices and industry concerns about its competitiveness, poised to put further strain on political discussions about the implementation of the “Green Agreement,” aimed at achieving neutrality. on climate by 2050 and strengthening emissions reduction targets by 2030. Some technologies to cut emissions, such as hydrogen generated without pollution, are still too expensive for steel and chemical manufacturers. But further price hikes could change that. Record carbon prices in Europe will strengthen the Government budget. EU leaders are arguing about enacting stricter pollution targets over the next decade at an extraordinary summit in Brussels, to be held on May 23. On July 14, the European Commission will propose a regulatory package to enact a new goal, by 2030, to cut greenhouse gases by at least 55% from 1990 levels. Agree by national governments and the European Parliament to become the binding rule. https://kinhtexaydung.petrotimes.vn

Waste characteristic of practical agricultural product processing establishments is organic matter which smells, causes strong infection, causes enough harm to human health. Most of the food products that people use, after being used, are not properly collected and handled, creating many risks of environmental pollution. Even on many streets in Hanoi, it is not difficult to see vendors in food and beverage shops pouring leftovers into closed containers, and waste water casually pouring down the drain.
If in the suburbs, food waste is used by the people as agricultural by-products or animal feed, in the inner city, all households collect it with domestic waste. Waste collection on Trang Thi street, Hanoi. Photo: Victory Ms. Nguyen Thanh Nhan (Linh Nam ward, Hoang Mai district) shared: “There are not many people in my house gathering leftovers to feed the animals, so there is no other way to wait for workers to clean the environment. school to collect ”. Therefore, in many areas, all kinds of waste are not classified but collected together. Rice, meat, eggshell … in garbage bags, splashing, wet, smells unpleasant. According to a cleaning worker in Hai Ba Trung district, organic waste such as excess food is believed to be the main cause of bad odors, bad smells in landfills, harmful to health.
According to Prof. Dr. Dang Kim Chi – Chairman of the Science and Technology Council, Vietnam Association for the Protection of Nature and Environment, food waste is a global problem, one of the causes of pollution. current living environment. Methane from food waste generates 3.3 billion tons of greenhouse gas per year and accounts for about 7% of total emissions. In general, the improper disposal of waste also pollutes the soil and water resources. “If there is no good control as well as there is no suitable and scientific treatment method right from the production process and after use, the consequences from food waste are not small” – GS. Dr. Dang Kim Chi said.
Utilize as a resource resources
Facing pollution but difficult to manage food waste, Prof. Dr. Dang Kim Chi said that firstly, it is necessary to have radical, scientific and practical measures. First of all, it is necessary to control right from the production source, prevent harmful substances in the product from the source of waste generation. When this solution is well controlled, food waste will be reused, recycled into animal feed, microbiological fertilizer … Along with that, the second measure must strictly control food waste sources. The third method, which requires scientific contributions, when food waste has been contaminated and needs disposal, it is necessary to find a solution to separate or neutralize the toxin that follows the food waste before reintroducing it. into animal feed, organic fertilizer …
In addition to controlling right from the production source, according to the Deputy Director of the Institute of Natural Resources, Environment and Community Development Tran Thi Huong, it is necessary to utilize food waste as a resource. This is the general trend of the world to operate a circular economy to thoroughly limit the impacts of environmental pollution and utilize waste into raw materials. “The efficient use of by-products in food processing such as rice husks, bran, molasses, bagasse, organs, fish fat, mucilage biomass, crustaceans … by applying science and technology and technical progress in the stage of reproduction as well as investment and waste treatment; Implementing clean production, saving energy is to increase the surplus value by making full use of natural resources, and at the same time making an important contribution to environmental protection ”- Ms. Tran Thi Huong acknowledged. The revised 2015 Japanese Food Recycling Law requires 95% of recycling responsibilities for food processors, 70% for food businesses, and 55% for food retail stores. and 50% for restaurants. The act of intentionally disposing of bulk food, causing environmental pollution, can be subject to a very severe penalty.

India is one of the worst affected countries, with many areas often covered in smog with dangerous particles of dust floating around. The Lancet Medical Journal’s “Global Burden of Disease” study estimates that pollution caused about 1.7 million premature deaths in India in 2019 – almost 18 percent of all deaths. in this country. New Delhi capital sinks in air pollution – Photo: AFP Based on this study, a new analysis by consulting firm Dalberg Advisors shows that air pollution reduces productivity, reduces consumer and tourist spending, costs Indian businesses $ 95 billion. each year, equivalent to 3% of the gross domestic product (GDP) of the country. Director of Dalberg Asia – Gaurav Gupta said: “Clean air is a prerequisite for businesses to thrive. Industry leaders should take more ownership and become advocates of the movement for cleaner air. According to a report by the Clean Air Fund, a charity, the estimated number of years of work lost due to hundreds of thousands of premature deaths is estimated to have cost India’s economy $ 44 billion in 2019 because air pollution. In addition, Dalberg says the effects of pollution on the health of Indian workers cost them 1.4 billion sick days a year, or about $ 6 billion in lost revenue.

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