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?上海山美重型矿山机械股份有限公司董事长杨安民接受《澎湃新闻》采访

时间:2019-06-11 11:37 来源:中福机电 作者:湖南机电

此外,人们对再生产品的普遍看法有待改变,杨安民提到“建筑废弃物通常被认为是垃圾,因此人们听到这个名字就会有抵触。他们需要时间接受建筑垃圾再生产品,即使它们符合安全和质量标准。”

建筑废弃物的处理和利用是一项长期艰苦复杂的工作,既需要众多企业的积极参与和社会各界的广泛关注,又需要各级政府部门的关心和大力支持;既要解决技术层面问题,又要结合政策、经济、市场、法制、管理等多个层面进行系统研究。

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Shanghai Buckles Under Mounting Demolition Debris

Stricter waste dumping rules whip up clouds of dust in city suburb

Nov 20, 2017

SHANGHAI— Every hour, a truck laden with construction waste enters a site the size of two soccer fields in a southwestern suburb of China’s most populous city.

A short distance away from the mounds of bricks, wooden boards, and concrete blocks, Zhang Baobao sells unrefrigerated slabs of pork, chicken, and beef. The 51-year-old finds herself constantly battling the dust and pollution at the construction waste sorting site. It gets everywhere: in her hair, on the laundry she hangs out to dry at her nearby apartment, and even on her meat. “Sometimes it’s like a sandstorm,” she told Sixth Tone.

Like in many other Chinese cities, Shanghai government departments, developers, and individuals frequently tear down old buildings that are illegal, outdated, or simply standing in the way of urban renewal. Occasionally, such demolitions make headlines, such as in the case of one famous Shanghai “nail house.”

But with the skylines of China’s metropolises in a constant state of flux, demolitions usually attract little attention, and the same goes for the massive amounts of waste they produce. Stricter rules for dumping construction waste in Shanghai and its neighboring provinces — combined with an uptick in demolitions of illegal structures — have highlighted just how much waste the city’s construction sites produce: a staggering estimate of 20,000 tons of construction waste a day, about three times the weight of the Eiffel Tower. When it comes to legally disposing of this waste, however, the options are limited.

In the past, some of the city’s construction waste was dumped illegally, often in rivers and lakes far from the city. Last year, eight ships from Shanghai were caught dumping 4,000 tons of construction material and household waste —roughly equivalent to one-third of the trash produced in New York City each day— on the scenic shores of Taihu Lake, located about an hour from Shanghai in eastern China’s Jiangsu province. According to news reports, the company responsible was planning to dump a total of 4 million tons of waste within one and a half years.

With the waste disposal issue reaching a tipping point, in July, the Shanghai government announced a ban on transporting construction waste from the city to other provinces. Currently, however, Shanghai lacks sufficient infrastructure to manage the waste it produces. The municipal leadership’s order to handle the problem by either burning or recycling construction waste has trickled all the way down to neighborhood officials, who have begun to feel the burden.

“We have tried our best, but a large portion of the construction waste still has nowhere to go,” said Shen Feng, a sanitation official in the Yueyang neighborhood of Shanghai’s Songjiang District, home to the construction waste site that Sixth Tone visited. Songjiang produces around 1,000 tons of construction waste per day.

“We have tried our best, but a large portion of the construction waste still has nowhere to go.

- Shen Feng, neighborhood sanitation official ”

During the sorting process, nearly 25 percent of construction waste is classified as combustible, meaning it can be incinerated. But due to the immense volume and crude sorting technology, not all combustible materials make it to incinerators.

Another 50 percent of the waste can be recycled, typically for use in building roads or filling hollow land. The remaining 25 percent is dust or ash — materials that have triggered complaints from the public and stumped waste management officials.

By 2020, Shanghai intends to recycle, reuse, or burn all the construction waste it produces. But the challenges become clear at the dumping site near Zhang’s butcher shop, one of few sites where such waste is being sorted. With the help of excavators, site foreman Su Jian and his co-workers sort through mountains of waste each day. They have taken to hosing down the trash with water to better control the dust. Su told Sixth Tone that they received specially designed, enclosed sorting machines to help reduce the amount of dust in the air, but that they are waiting for the machines to be connected to a source of electricity.

“The city has difficulty processing the growing volume [of construction waste] ,” said Yao Yongmei, the official who oversees sanitation regulation in Songjiang. At present, the district’s single incineration plant has a capacity of 2,000 tons per day and is designed to handle household waste, though it is also used to burn combustible construction waste.

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