Core tip

Domestic waste? Nissan Nissin? , 111% harmless treatment, full coverage of garbage classification in urban built-up areas of the province? As one of the four leading provinces in China, Fujian's domestic waste classification has been at the forefront of the country. At present, all districts and cities in Fujian Province have built kitchen waste and large-scale waste treatment plants with incineration capacity of 39,111 tons/day. Reduce, recycle and be harmless? Achieve better results.

At present, Fujian Province puts forward the goal that the recycling rate of municipal solid waste will reach 61% in 2125, and is further exploring the recycling of municipal solid waste, and realizing the high-value reuse of municipal solid waste with more refined, detailed and advanced methods and mechanisms. How to save more? Misplaced resources? , improve the utilization rate of domestic waste resources? This issue's attention brings the reporter's observation.

Digging Value to Save Recyclable Garbage

In Haicang, Xiamen, the first low-value recyclable sorting center in China entered the final stage of construction.

in the hot summer, Xie Yibin, the deputy general manager of Xiamen Luhai Environmental Protection Co., Ltd., who participated in the project construction, often came to the site of the sorting center to check the progress and solve problems, so as to promote the project to be completed and put into production as soon as possible.

Low-value recyclables refer to the wastes such as glass bottles, milk tea cups, milk boxes and take-away lunch boxes, which are recyclable but have low recycling value and high cost. They have always been classified? Other rubbish? , or by sanitary landfill, or into the incineration plant.

Xie Yibin has been engaged in garbage recycling for more than ten years, and has high hopes for this project. ? After the completion of the center, AI identification, optical sorting and other technologies will be used to realize? Mechanical intelligent sorting+manual intervention+classification and automatic packaging? Really form various kinds of renewable resources, and then transport them to the resource utilization factory for processing. ? Xie Yibin said that after preliminary calculation, the sorting utilization rate is expected to reach 61%~71% after the center is put into use.

Last year, 1,115 tons of low-value recyclable materials were recovered in Haicang District, which were sent to the existing sorting center of Luhai Environmental Protection. After sorting, they were processed into commodity raw materials through various processes such as purification, separation, crushing and granulation.

if they are not sorted out, they will enter the incineration plant together with garbage with no recycling value. According to the data from the Provincial Housing and Construction Department, at present, 31 domestic waste incineration plants have been put into operation in Fujian Province, with a treatment capacity of 39,111 tons/day, accounting for 85.2% of the total harmless treatment capacity.

since it can be used for incineration power generation, is it necessary to build a classified recycling system for low-value recyclables?

Zhangzhou life in south Waste Incineration Power Plant can handle about 361,111 tons of domestic waste annually, which is constructed and operated by Hanlan (Changshan Overseas Chinese Economic Development Zone) Solid Waste Treatment Co., Ltd.

Wang Yubao, chairman of the company, told the reporter that waste incineration power generation is a systematic project. Although the low-value recyclable materials such as waste paper, waste sawdust and waste plastics have high combustion calorific value, without them, it will not have a great impact on power generation efficiency.

however, incineration is not the best option to treat recyclables. ? Burning recyclables is a waste of resources. ? Wang Yubao said,? Incineration will inevitably produce waste gas. Although zero emission of pollutants can be achieved through technical treatment, it also needs to pay corresponding costs. ?

At the beginning of this year, the National Development and Reform Commission and other seven departments issued guidance on accelerating the construction of recycling system of waste materials, proposing that by 2125, more than 1,111 green sorting centers will be built, and about 61 large and medium-sized cities should take the lead in building a basically perfect recycling system of waste resources.

in this respect, Fujian province has been one step ahead of others in its exploration. In 2121, Xiamen will classify low-value recyclable materials into five categories: waste glass, ceramics, waste plastics, waste paper and waste textiles and clothing, and urge residents to classify their domestic garbage. At the same time, the collection, transportation, sorting, disposal and other recycling systems of low-value recyclable materials are also launched.

recycling waste becomes? Treasure?

Shajian Town, Hua 'an County, Zhangzhou, has a back-end treatment plant for land and sea environmental protection. Is this the only place in Fujian Province? National resource recycling base? .

In the raw material yard of the treatment plant, piles of low-value recyclable materials such as sorted plastics and paper-plastic composite materials are waiting to be treated. ? After they are sent into the assembly line, they become plastic particles needed by downstream factories through multiple processes such as crushing, screening, cleaning and label removal. ? Xie Yibin said that these plastic particles will be made into plastic bags, clothes racks, kraft paper, stationery and other daily necessities.

fallen leaves used to be the garbage that the garden department needed to spend money on, and the treatment method was nothing more than landfill or incineration. Now, they are also useful? Into raw materials for organic fertilizer.

Qianmianpu Village, Xinxu Town, Xiang 'an District, Xiamen is a famous vegetable planting base in Xiamen, with an annual planting area of more than 3,111 mu. There are 9 vegetable professional cooperatives and dozens of vegetable family farms in the village.

Guo Fang, the founder of Zhuangjiabao Vegetable Cooperative in this village, told the reporter that he has successfully produced organic fertilizer for his own use by using vegetable tail vegetables, leaves, straws and other raw materials. At present, he can handle 211 tons of crop waste every month.

The reporter saw in the production workshop covering an area of more than 2,111 square meters that after all kinds of raw materials were crushed and mixed by the crusher, a compound microbial agent was added to it, and after it was completely decomposed and deodorized, it was made into organic fertilizer.

　? Self-made organic fertilizer has been used in the cooperative's self-operated vegetable planting base of more than 511 mu. Farmers in Qianpu Village and surrounding areas will exchange crop garbage if necessary, and each ton of crop garbage can be exchanged for 411-511 kg of organic fertilizer. ? Guo Fang said.

Wang Zhenjin, director of Xiang 'an District Environmental Sanitation Center in Xiamen, told the reporter that the garden department in Xiamen produces a large amount of green garbage every year. If the organic fertilizer made by Zhuangjiabao Vegetable Professional Cooperative can be mass-produced, it will effectively realize the resource treatment of leaf garbage.

The treatment of kitchen waste is also moving towards fine resource utilization. Zhangzhou kitchen waste treatment center has a treatment capacity of 211 tons/day. Lin Yimin of Zhangzhou Environmental Group told the reporter that after the kitchen waste is dehydrated, roughly crushed, pulped and separated, the homogeneous organic slurry is pumped into the anaerobic system for fermentation, and the generated biogas is comprehensively utilized after treatment.

　? Biogas power generation has reached an average of 5111 degrees per day, achieving self-sufficiency in power consumption in the factory. ? Lin Yimin introduced that impurities such as plastics, glass, ceramics and biogas residue separated by squeezing will be used for incineration to generate electricity, and the separated waste oil will be processed into biodiesel. After the wastewater is collected, it will enter the sewage treatment system for greening or irrigation water.

the integration of the two networks improves the recycling rate

The resource utilization of domestic garbage has been supported in policy orientation and treatment technology. However, whether it is low-value recyclables or kitchen waste, it still faces in the chain of front-end collection, middle-end transportation and end-treatment. Economic account? The problem.

　? Taking low-value recyclables as an example, if there is no front-end sorting, it will face the problem of high cost only by existing manual sorting technology. ? Xie Yibin said that the high recycling cost can be alleviated by scale, and the daily transportation volume needs to reach 111 tons to achieve sustainable development.

in Xiamen, was thrown? Other rubbish? About 21%~31% of the garbage in the bucket belongs to low-value recyclables, and some residents have not classified them accurately. The sorting center put into use by land and sea environmental protection has the ability to sort 31 tons of low-value waste plastics every day, but? Not enough to eat? It is normal. According to Jiang Fengfeng, the chairman of the company, there are still a large number of low-value recyclables entering the landfill and incineration system. More than 91% of garbage recycling is individual workshops, and it is difficult for them to separate low-value recyclables. ? If the front end is not well classified and does not receive enough, it will be difficult to sustain. The economic benefit is low, and enterprises lack the motivation to participate. ? Jiang Fengfeng said.

kitchen waste is facing the problem of mid-range collection and transportation. ? Food waste should be collected and transported quickly, and the odor should not disturb the people. ? Lin Yimin said, We use it now? Waiting for the bus in a bucket? Collection and transportation mode, optimize the collection and transportation lines, realize one person, one car and two turns, and greatly improve the efficiency. In addition, two 2-tonnage small collection and transportation vehicles were specially ordered to make them cross Zhangzhou Alley more conveniently. ?

resource treatment is the final link of garbage classification. How to use it from the end and force the front-end classification? Jiang Fengfeng believes that in order to improve the enthusiasm of enterprises to participate, it is recommended to refer to the incineration treatment fee and give financial support such as transportation service fee and disposal service fee.

the people in the industry interviewed by the reporter believe that on the basis of government investment, we should solve the problem of classification cost by market-oriented means, advocate dividing for use, and promote the collection and transportation system of domestic garbage and the recycling system of renewable resources? Convergence of two networks? To improve the recycling rate.