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Science and engineering men use their brains to explore intelligent garbage classification

release date: Source: China Youth Daily

came to Nanchang, Jiangxi Province for the first time to study. The Qingyang boy in Gansu Province sighed, "the green belt at the school gate is wider than the road in his hometown". But as soon as he returned to the dormitory, he couldn't be happy, because the dormitory was close to the public garbage cans on the floor where he was located. The garbage cans were often full and overflowing. In summer, it was smelly, and rats, flies and cockroaches often haunted nearby

this man of science and engineering, who majored in energy and power engineering in Nanchang University in 2015, thought about the garbage can. At that time, he didn't expect that what he later did was an advanced project

in September 2020, the main campus of Nanchang University began to remove the original garbage cans in the corridor layer by layer, pave four classification intelligent garbage classification recycling bins under the student apartment building, and connect the environmental credit system to the school management system, requiring students to go downstairs and put their real name garbage classification. These four classification intelligent garbage sorting and recycling bins are developed, designed and operated by the "leaf regeneration" entrepreneurial team of Nanchang University, which can solve many problems such as "who are you", "what garbage are you throwing" and "reward and punishment cashing" in one step. The founder of the team is Shang Yi, and the members are students from various colleges of Nanchang University

men of science and engineering start thinking about garbage cans

the first year of school was 2015, when garbage classification had not been implemented in most parts of China. After checking the situation floor by floor and microcomputer control, Shang Yi found that the reason why the garbage can overflowed quickly was that recyclable cartons and plastic bottles accounted for most of the volume. However, as soon as someone threw a carton on his front foot, someone threw a bucket of instant noodles on his back foot, and the carton polluted by the soup also lost its recycling value. Mixed garbage is not only easy to cross pollute, but also makes the cleaners who clean and transport garbage usually call the maximum diameter and aperture ratio of the damage area as damage factors, which is a headache

in September 2017, Shang Yi set up a "leaf regeneration" team to conduct research on the problem of "garbage recycling". The research results found that only 80 dormitories can recycle about 3 sacks of recyclable garbage a day. The team welded an iron frame containing recyclables, and placed one next to the public trash can on each floor, which was basically full in two days

at the end of 2017, the team raised 40000 from students, borrowed 60000 from their parents, and collected more than 100000. The first batch of 60 intelligent recyclable garbage bins were developed and produced. Just pay attention to the "leaf regeneration" official account, enter the applet to register and log in, scan the QR code on the box before putting it in, put the recyclable garbage into the recycling box, and the background will integrate it into the user applet according to the delivery weight, and the points can be used to exchange for daily necessities

their idea is very simple: 60 garbage bins are placed on each floor of the pilot dormitory building, and the school's self-improvement society and voluntary service association can be invited to help with the recycling work. But the newly produced recycling box has some volatile smell, and some students complained. At this time, the school also began to advocate "garbage downstairs", and the garbage bins had to be placed under the dormitory. In this way, only 27 bins were enough

the remaining 33 recycling bins had to be stacked in the warehouse. They had tried to transform them and put them into surrounding schools or communities, but the cost was too high, so they had to give up

under pressure to do "four classifications"

at that time, the "leaf regeneration" only had a set of incentive measures, the integral mall, and the recycle bin only recycled recyclable garbage, which could not be disposed of all garbage at one time, so not many people used it. Shang Yi and his team members can only encourage students to participate in garbage classification by means of door-to-door recycling and holding environmental protection activities

at this time, the team disagreed on the choice of business model. Shang Yi believes that the first generation of garbage bins can only be called "unmanned waste recycling machine", which is not a complete garbage classification. Companies in the market are basically doing "unmanned waste recycling machine", which is easy and has no great social value. Shang Yi believed that we should recycle all kinds of garbage, "I hope we can do something valuable to society. Only when it is valuable to society, can we have real commercial value and go further". However, some team members believe that if full category recycling is done, there will not only be no peers to refer to, but also face greater economic risks. After nearly a week of fierce debate, three people left the team, and the remaining five members finally chose "social value", "this thing is always someone to do, why can't it be us?" Shang Yi said

in the second half of 2018, "leaf regeneration" began to build a fully intelligent four category garbage can. "The four classification garbage cans are also made in stages. Considering the difficulty of operation, we first make recyclable garbage and hazardous garbage into intelligent delivery, and kitchen waste and other garbage are still used in ordinary garbage cans. However, we found that if it is not intelligent, garbage classification will be in vain, and everyone will still litter. So at the end of 2018, we will start to make fully intelligent four classification, and each category requires real name certification before opening the garbage cans Door release "

due to the great difficulty of operation, only two of the first generation four classification garbage cans have been built, mainly for the initial innovation in plastic materials, processing equipment and technology, product design and mold design. The funds are used for the income generated by the operation of the first batch of garbage recycling bins

"the four categories are not easy. To be honest, for the economic benefits of enterprises, the four categories are three costs + one income. If it completely depends on market behavior, the recoverable income is not enough to cover the costs of other types of garbage recycling. Moreover, the market did not pay attention at that time. If promotion is to pay promotion costs, it will not be sustainable." Shang Yi admitted that they were under great pressure in the year when they made the four categories

the year of graduation ushered in a turnaround

in June 2019, it is still facing undergraduate graduation. The turnaround is also coming at this time

in June of that year, the Ministry of housing and urban rural development and other ministries and commissions issued the notice on comprehensively carrying out domestic waste classification in cities at and above the prefecture level nationwide, requiring the north to account for 28%; The export volume is 2.239 million tons, and 46 key cities such as Beijing and Tianjin will basically complete the garbage classification and treatment system by the end of 2020; In July, the "strictest garbage classification regulations in history" gradually implemented garbage classification in Shanghai. The market has ushered in a tuyere, and many colleges and communities have thrown olive branches to the "leaf regeneration" team

"the 'Shanghai model' requires regular and fixed-point delivery, with low adaptability. Relying on volunteers' manual supervision and inspection is time-consuming and laborious, and the human cost is high, which is difficult to sustain." Shang Yi believes that in order to truly solve the problem of waste classification, we must make intelligent waste classification recycling bins

in order to concentrate on this project, Shang Yi gave up the school's research guarantee. The family members who initially doubted them also began to fully support their project. This time, the team members raised 1million yuan from their families

in November 2019, the "leaf regeneration" team optimized and upgraded the intelligent recyclable garbage bins. In combination with the environmental management requirements of Nanchang University, "leaf regeneration" has developed an intelligent garbage sorting recycling bin with real name system, full category and unmanned supervision. The recycling bin is equipped with overflow alarm, sterilization and deodorization devices, and the delivery time is not limited

"you just invest in classification, and I am responsible for classification." This is a sentence written on the staff style wall of the "leaf regeneration" team. "If the front-end classification, delivery, collection and transportation are not done in place, the classification and disposal of the back-end cannot be carried out with high quality", but who will ensure and maintain the correct classification and who will dispatch the clearing vehicle, which requires a clear understanding of the division of labor of the role of "I"

Zhan Yong, the R & D personnel of the "leaf regeneration" team, told that "I" is equivalent to the intelligent brain that controls all intelligent garbage bins and is the central nerve of the intelligent classification system

when the garbage can overflows, "I" remind the backstage staff to clear it; When users deliver recyclable garbage, "I" use sampling analysis to judge whether the user classification is correct and retain electronic traces in time; When users make delivery errors, "I" use algorithms to analyze previous delivery behaviors, judge whether users make mistakes accidentally or often, and then decide whether to deduct users' personal credit scores and whether users need garbage classification knowledge training. After the garbage is put in, the background will automatically generate delivery records, and students will receive corresponding voice push and SMS prompts if the classification is correct or wrong

when the garbage collection bin is full, the background will receive a overflow alarm and send a special car to clear it. For recyclable waste, the "leaf regeneration" team also set up a transfer station in Nanchang University, which can realize rapid sorting and direct delivery to various recycling plants such as paper mills

binding student status scientific rewards and punishments

in order to break the stereotype of some students that garbage classification is very troublesome, volunteers posted garbage classification guidelines in students' dormitories, and there were relevant introductions on "leaf regeneration" official account, app, and even garbage cans (bulletin boards). Team members also publicized in dormitories one by one, explaining to each student how to participate in garbage classification in the simplest way. They also shot garbage classification teaching videos and pushed them on various platforms of the school. A large number of humorous and interesting videos were widely disseminated on the campus, dispelling everyone's resistance to garbage classification. The team also gave garbage bags free of charge to each dormitory, and let the students exchange them for gifts through 1 point exchange and other forms to form positive feedback

Nanchang University has given full green light support to this "leaf regeneration" project. The university has integrated the environmental credit system into the school management system, and incorporated personal environmental credit scores into student evaluation. Relying on various delivery data in the background, the "leaf regeneration" team and the staff of Nanchang University Logistics Service group jointly studied and discussed to form a preliminary plan for the provisions on rewards and punishment of garbage classification in student dormitories

Nanchang University requires students to uniformly download the "leaf regeneration" app. After real name registration and certification, the environmental credit system is bound to the student's student status information. The system can accurately identify "who delivered", whether the garbage classification is correct or not, which is directly linked to students' awards and scholarships, and the personal environmental credit score is reduced to a certain value, in addition to reducing the number of awards and scholarships this year, Students will also be required to attend garbage classification training courses and take exams. For students who have classified garbage for many times and have the correct classification, there are also corresponding rewards and bonus points in the reward and punishment regulations

how to ensure that the system can judge fairly? Zhan Yong told that first, by improving the sampling inspection rate, the classification feedback of the recovery points is becoming more and more accurate, which can answer "whether the classification is correct"; Second, build a behavior evaluation system through algorithm, which can strive for fair reward and punishment behavior; Third, all delivery behaviors can be traced back, and users can apply for "re judgment"

Shang Yi said, "enterprises have no law enforcement power, and this set of assessment methods of the school has a certain binding force on students' garbage classification behavior. The purpose of scientific rewards and punishments is to let users correct their delivery behavior under the guidance of the system and the pressure of credits"

in August 2020, Nanchang University included garbage classification and reduction in the admission notice, which was sent with the admission notice

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