Straw was piled up and burned by people, causing smoldering smoke to spread everywhere, spreading to the highway. Photo: Le Phu/ Newspaper As part of the series of events “Air pollution and our responsibilities”, the Science and Development Newspaper of Spark Magazine in collaboration with the Center for Living and Learning for the environment, the community (Live and Learn), the Internet. The Vietnam Clean Air Network (VCAP) organized an online seminar on the topic “Straw burning: Don’t waste gold and lessons from the community”. This is an opportunity for experts and businesses to share about applying local solutions to reuse straw, the challenges faced when completely ending burning straw in the field. Master Nguyen Thi Yen, Department of Agricultural Microbiology, Center for Organic Agriculture (Vietnam Agricultural Academy) said: In the winter-spring crop of 2021, there are at least 6 suburban districts of Hanoi (Soc Son, Dan Phuong) , Thanh Oai, Chuong My, Dong Anh, Ba Vi) with more than 1,000 hectares of fields applying straw treatment solutions to replace burning. Activities such as training the core group of farmers; deploying communication through online and group channels; technical guidance, practice handling solutions; Budget support for localities, cooperatives, farmers to access probiotics or collect straw has been implemented… Since then, many models and initiatives have been encouraged to be implemented such as: Association Women in Soc Son district process rice straw into organic fertilizer, Dan Phuong District Farmers’ Union distributes bio-products, Ba Vi district farmers collect straw and mill straw to make fodder for cattle… Ms. Truong Thi Thanh Nhan, Vice Chairwoman of the Women’s Union of Soc Son district, said that the collection of recycled straw into microbial fertilizer was implemented in Duc Hoa and Xuan Thu communes. In addition to propaganda to raise awareness for farmers, the District Women’s Union also helps households collect rice straw and compost 60 mounds (2 quintals of straw/mound), process it into micro-fertilizer, contributing to reducing reduce the burning of straw. Mr. Nguyen Tuong Hung, Director of Pho Hien Machine Co., Ltd. shared that the company is currently processing rice straw by using a straw roll machine in combination with a local plow to collect straw; technical support and consumption of the output straw. The advantage of the straw rolling machine is that it has a reasonable price, only about 5-10 million / machine. Harvest time is from 1-2 days after reaping and before plowing, yield from 1.5-3 ha/shift/hour. The straw roll has a diameter of 50cm, a width of 70cm, weighs from 12-14 kg, easy to carry, transport… At the seminar, the speakers and businesses answered some questions from readers related to the reuse of straw. The experts discussed and proposed some solutions using different technologies to continue using rice straw, increasing the value of straw in agriculture; can be applied from large scale for enterprises, cooperatives to small farmers. According to statistics from the Hanoi Department of Natural Resources and Environment, it is estimated that each year, the city generates over 1 million tons of rice straw and agricultural by-products. In which, the amount of straw burned in the field is about 352,000 tons (accounting for 33.7%). The burning of rice straw produces CO gas – a very toxic gas that can be deadly, and at the same time causes smoke and dust affecting road and air traffic safety in the area. In addition, according to experts, the nutrient content in straw ash is very low, so it has no effect on soil improvement.

An old Galaxy phone is used as a sensor for the sound of a baby crying. Photo: Samsung Through the SmartThings app, users can convert the function of Samsung Galaxy phones from 2018 and earlier into sound sensors to notify when they hear a knock on the door or the sound of a baby crying. Light sensors, which are used to adjust screen brightness, can be used to automatically control indoor lighting. Samsung also said that the battery of the old phone will be optimized to increase the uptime when the device has a new “life”. Innovative reuse is a method of reducing technology waste that is still relatively new compared to traditional ways such as giving away, returning the company or reselling. With this project, technology brands from Korea are expected to contribute to encouraging users to take advantage of old smartphones in everyday life, and help promote more of its technology ecosystem. Even so, according to technology site Ars Technica, despite its good environmentalism, the Upcycle program only allows the reuse of light and sound sensors. In fact, spontaneously, users have been devising many initiatives to reuse old phones, such as converting them into security cameras, data storage hard drives or music players.

Illustration. TASS. Igor Pshenichnikov, responsible for the Amur-LNG project, said Russian experts are developing a reusable methane rocket engine for the Amur boosters that can redirect carriers. off the launch pad in the event of take-off malfunction. “We are planning to deploy a hot backup and guidance system in the Amur boosters,” he said. If one of the motors fails, it will be turned off while the operation of the other thrusters will be accelerated. The lead expert explained: “In this situation, the quest continuation option would be considered.” If damage occurs during takeoff or near the ground, the missile will not be able to launch due to its large mass. That is why the missile is diverted to a safe distance so as not to damage the launcher. Russian State Space Corporation Roscosmos and Progressive Space Missile Center signed a contract in October 2020 for the design of a space missile system concept with reusable methane-fueled rockets. The first Russian Amur application. The missile will be launched from Vostochny aerospace in the Russian Far East at a stage of reuse. In February, Dmitry Baranov – Director of the Advanced Space Rocket Center (a division of Roscosmos) said work on the conceptual design of the methane Amur fuel missile will be completed by the third quarter of 2021. . Amur is a commercial missile carrier. With the reuse phase, it will be able to put the payload of up to 10.5 tons into orbit as low as Earth, compared with the 8.5 tons carried by the Soyuz-2 rocket.

The scene of the training class.

Vice Chairman of Dong Da District People’s Committee Ha Anh Tuan said that the goal of the training course is that the domestic waste step by step is classified according to the criteria of 3R (3R = Reduce, recycle and recycle). use (Reuse)); disposing of trash on time, at the right place; continue to maintain 100% daily waste collection; proceed to no garbage on the street, promptly collect garbage generated at all times of the day.

At the same time, strengthen the county’s State management over medical and hazardous waste disposal; adheres to the provisions of Joint Circular 58/2015 / TTLT-BYT-BTNMT on medical waste management, issued by the Minister of Health – Ministry of Natural Resources and Environment, and has performed well the tasks assigned by the City People’s Committee. approved in the project “Hazardous medical waste treatment in Hanoi to 2020, with an orientation to 2025”.

The Vice Chairman of the People’s Committee of Dong Da district also said that the district strives for domestic waste: Sorting over 70% of domestic waste. Reduce the average amount of waste 1.08 kg of waste / person / day to less than 1 kg of waste / person / day (down 7-8%). Guaranteed to collect 100% of daily domestic waste. 100% of people dump their trash on time and at the right place. 50% reduction in the number of manual collection trucks that collect rubbish in the alleys to replace them with motorized ones. 100% of means of transportation and garbage collection are fully inspected, maintained, maintained, and cleaned regularly, to ensure technical requirements (tight, not leak water and garbage vapor).

As for medical and hazardous wastes: 100% of medical and hazardous wastes are collected, transported and handled in accordance with the technical process and standards. 100% of medical facilities under the management of the district invested in completing the medical waste and hazardous waste classification system to ensure the standards and technical requirements as prescribed. 100% of small businesses and production establishments have measures to treat hazardous wastes such as motor oil, detergent, heavy metals, wastewater …