Engineering muck turns into fertile land. Hangzhou is committed to the innovation of construction waste consumption.
Editor’s Note: How to deal with construction waste has always been a thorny issue facing urban construction. At the same time, the rapid and extensive demolition and construction mode and simple and primitive treatment methods have led to the overall resource utilization rate of construction waste in China being less than 10%, and it is still in the stage of extensive landfill and stacking. How to deal with construction waste with nowhere to put it? How to solve the dilemma of "besieged city" of construction waste? The resource utilization of construction waste is imperative.
To this end, Zhejiang Online specially launched a series of reports on the rebirth of construction waste, to understand the current situation of waste resource utilization in our province through investigation and visit, to explore the experience and methods of cracking the "besieged city" of construction waste in various places, and to show the innovative way for green enterprises to explore circular economy.
Zhejiang Online March 30th (Zhejiang Online reporter Zhu Bin)In the abandoned mine near Dongheng Village, Luoshe Town, Deqing County, with the green engineering waste transport vehicles coming in and out, the originally rugged low-lying land has gradually turned into an endless paddy field after years of reclamation, and these engineering waste came from xie cun Waste Transfer Terminal (hereinafter referred to as "xie cun Terminal") of Hangzhou Port.
Leveling the reclaimed land for planting rice.
"(engineering slag) soil is actually a resource!" The relevant person in charge of the city appearance supervision department of Hangzhou City Management Committee (hereinafter referred to as "Hangzhou City Management Committee") told the reporter. Construction waste can be divided into five categories: engineering muck, waste mud, demolition waste, engineering waste and decoration waste, and its recycling is the research focus of construction waste disposal in the province.
In recent years, with the large-scale urban construction in Hangzhou, the generation and disposal of a large amount of construction waste has also become a phased problem facing Hangzhou. According to the person in charge, at present, there are about 50 million cubic meters of engineering muck produced by urban construction in the main urban area of Hangzhou every year, and this phenomenon may last until 2021 due to large-scale urban construction. He said that the Hangzhou Urban Management Committee has been committed to innovation in the consumption of construction waste and is gradually establishing a complete regulatory mechanism for the normalization of construction waste.
Build a high-standard muck transfer terminal
Let the engineering muck have a "good place"
The reporter learned that there are currently three muck transfer terminals in Hangzhou, among which xie cun Terminal and Luhe Terminal have been put into operation, and Chengdong Terminal is still under construction. "xie cun Wharf is built to a high standard, and the whole process of muck entry and exit has been supervised, which is leading in the country." The person in charge mainly introduced the related operation of xie cun Wharf to the reporter.
Xie cun wharf information management center
Xie cun Wharf, the first large-scale and modern construction waste water transfer operation point in Hangzhou, was invested and constructed by Hangzhou Lvnong Environmental Engineering Co., Ltd. in 2016. It is understood that the terminal covers an area of about 84 mu, uses a coastline of 456m, and has seven 500-ton berths, including six berths dedicated to construction waste and one berth dedicated to mud. The terminal business radiates to Gongshu District, Jianggan District, Xiacheng District, Xihu District and Yuhang District of Hangzhou, with an average daily throughput of 60,000 tons of construction waste and 15,000 cubic meters of mud.
The terminal has also established an information management system to connect with the information management platforms of Hangzhou Urban Management Committee, the municipal traffic police department and the municipal port and shipping department, and provide "one-stop" information services from admission, weighing, scheduling, unloading, measurement and tracking.
In recent years, the Hangzhou Urban Management Committee has been focusing on the resource utilization of construction waste, which has given the engineering muck a "good place". The main destination of the transport ship from xie cun Wharf is Luoshe Town, Deqing County, and the engineering dregs on the ship are used for the reclamation of abandoned mines in the local area.
The area on the satellite map that has been backfilled and reclaimed.
From muck transport to backfilling and reclamation, the whole process is also subject to strict environmental protection standards. Before the construction muck and mud are transported from the construction site, the general contractor shall provide the environmental impact assessment report of the land to be developed to ensure that the land is pollution-free and sign a disposal contract; From the beginning of outbound transportation, to the transfer terminal, and then to the disposal site, the dregs and mud at the construction site must be tested by a third-party environmental protection testing institution recognized by the environmental protection department, and the soil and water quality in the backfill mining area must be tested to ensure that the dregs and mud used for the backfill treatment of waste ore in the whole logistics chain are nontoxic and harmless.
"It is the first in the country to turn abandoned mines into land after treatment and to grow rice!" In 2015, the provincial land work conference was held in Dongheng Village, Luoshe Town, Deqing. Zack Zhang, deputy director of the Urban Construction Department of the Ministry of Construction, and Liao Yonglin, director of the Finance Department of the Ministry of Land and Resources, made important instructions.
Gradually establish a normalized supervision mechanism.
Let the supervision of construction waste "have no dead ends"
The relevant person in charge of the City Appearance Supervision Department of the City Appearance Center of Hangzhou Urban Management Committee said that it is a win-win practice to solve the problem of the disposal of engineering muck through the backfilling of abandoned mines, but the lack of space for the disposal of construction waste is still a key problem to be solved urgently. In the face of the staged pressure brought by the urban development of Hangzhou, in addition to the innovation of construction waste consumption, Hangzhou Urban Management Committee is also strengthening the supervision of construction waste disposal.
The information of all muck transport vehicles is fed back in real time on the comprehensive management and control platform of construction waste in Hangzhou.
On the comprehensive management and control platform of construction waste in Hangzhou, the reporter found that the monitoring images of several major muck transfer terminals, the real-time information such as the running track and transportation situation of all muck transport vehicles are presented, and the relevant administrative examination and approval of construction waste transportation can also be realized online. Relying on this information platform, Hangzhou Urban Management Committee is gradually establishing a complete regulatory mechanism for the normalization of construction waste.
It is understood that the first phase of the information platform began in 2016 and the second phase was completed in 2017. In addition to further improving the supervision function of the construction waste disposal process, it is also stepping up the comprehensive coverage of all urban areas in Hangzhou. "From disorder to order, from order to standardization, with the gradual stabilization of urban construction in Hangzhou, we are also establishing a normalized supervision mechanism." The person in charge said.
Since 2013, with the promotion of government departments, our province has successively carried out research on the development of resource utilization of construction waste, and Hangzhou is also constantly promoting the development of the end industry of resource utilization of construction waste. It is understood that about 40 resource utilization points for centralized treatment of construction waste have been established in Hangzhou, and some enterprises have introduced imported mobile construction waste treatment facilities.
Mobile construction waste treatment facility
"Demolition of garbage without leaving the city" is the goal of construction waste disposal established by Hangzhou Urban Management Committee, and the most effective way is to realize the resource utilization of construction waste. However, Hangzhou also faces the practical problems of low resource utilization of construction waste and underdeveloped end industries. In view of this problem, the person in charge thinks that the disposal of construction waste should be effectively supervised first, and then the resource utilization mode of construction waste should be continuously explored, which is a gradual development process.