How does Singapore achieve a high proportion of ch

2022-08-09
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How does Singapore achieve a high proportion of chemical wastewater reuse

the land area is only more than 700 square kilometers, less than 1/20 of Beijing. It is only about 40 kilometers horizontally and 20 kilometers vertically. Land resources are poor and freshwater resources are scarce. Facing such natural conditions, Singapore has built a "garden city" and become a tourist attraction. What's more incredible is that Singapore has many prominent Petrochemical labels at the same time - one of the world's three major refining centers, one of the world's top ten Petrochemical centers, one of the world's largest oil refining centers, one of the world's three major oil trading hubs, and the Asian petroleum product pricing Center...

the southwest, about 10 kilometers away from the urban area, is Singapore's world-famous chemical Island Jurong Island, There are more than 100 chemical enterprises in the island, and many world-class petrochemical giants such as shell, ExxonMobil, Chevron, DuPont, BASF, etc. are "based and established" here, covering all links of the whole industrial chain in the petroleum and chemical industry, from oil refining and chemical industry to warehousing and logistics. The island is formed by reclamation of seven small islands, covering an area of only about 32 square kilometers. However, the construction fund of about S $7billion (about 35 billion yuan) has driven the investment of more than S $50billion (about 250billion yuan), supporting the chemical industry to become one of Singapore's pillar industries

how does Singapore achieve the symbiosis between the world-class heavy chemical industry base and the garden city, and the integration of economic development and green environmental protection? With doubts, I recently conducted a relevant visit and research in Singapore

water resources from dependence on imports to self-sufficiency is expected

Singapore is in the rainy season at the end of October. After the rain washed away, the watery green plants and flowers on the street set off against the clear rivers and lakes, making the whole city look vibrant and full of "new ideas"

in such a scenario, it is difficult for people to imagine that this is a country with extremely scarce freshwater resources. It is reported that Singapore has been importing a large amount of fresh water mainly from neighboring Malaysia. In order to get rid of this situation, the Singapore government attaches great importance to the development and innovation of industrial sewage treatment technology, so as to improve the efficiency of enterprises in water treatment and realize the recycling and reuse of industrial sewage and municipal wastewater on the island of Singapore

in 2010, SembCorp industries group, a subsidiary of Temasek Holdings, Singapore's largest state-owned enterprise, invested US $180million to build the largest new water plant in Singapore, SembCorp new water plant. The plant is also one of the largest recycling water plants in the world. At present, it produces about 230000 tons of fresh water every day, which can provide about 15% of Singapore's water

the so-called fresh water is to further purify the domestic and industrial sewage that has been uniformly and intensively treated by the municipal government by adopting advanced microfiltration/ultrafiltration, reverse osmosis membrane and ultraviolet sterilization technology to form high-quality purified water. Most of the new water is used for industrial production, and a small part is pumped into the reservoir to mix with the rainwater of nature. After purification and disinfection by traditional process, it forms domestic water

with the strong support and call of the Singapore government, new water has become a high-quality recycled water brand in Singapore. It is reported that at present, the total fresh water used in Singapore has accounted for 1/3 of the total water demand

nowadays, in addition to imported water, Singapore's "faucet" has multiple sources of fresh water, local water collection and seawater desalination, effectively ensuring the fresh water supply of its residents. It is reported that Singapore is expected to achieve full independent supply of national water after the expiration of the Malaysian water import contract in 2060

realize high proportion recycling and reuse of chemical wastewater

Jurong Island, which was first operated in 1997, is the largest chemical enterprise park in Singapore. Almost all chemical production enterprises in the country are gathered here. Therefore, Jurong Island is not only a large water consumer, but also a centralized place for industrial sewage discharge. The task of industrial water supply and sewage treatment in the park is arduous

driving in the Jurong Island area, in addition to the scattered chemical plants, various chemical product production plants, storage warehouses, logistics bases, oil tankers, wharves, and the wide green space to be built, the neat and uniform water, gas, and heat utilities along the way are a unique landscape in the island

according to the introduction, Singapore implements the management idea of source control of industrial wastewater. Industrial enterprises can directly discharge the wastewater generated in their production process to qualified sewage treatment companies for centralized and unified treatment, and then safely discharge it into the sea or industrial reuse. In Jurong Island, infrastructure including waste/water treatment, steam, water supply, industrial fire protection, etc. can be shared through public pipe galleries, and enterprises can "plug and play" when settling in

SembCorp group is the largest utility operator and water treatment enterprise in Jurong Island. By operating a one-stop service utility integrating industrial water and sewage treatment, natural gas, power and steam, the group provides services to more than 40 multinational petrochemical and chemical users across the island

in 2007, the group completed the first MBR (membrane bioreactor) project for chemical sewage treatment in Singapore, and the chemical oxygen demand (COD) of effluent was better than the first-class a standard. As one of the earliest MBR projects in Asia, the current total scale of water treatment is 2880 tons/day. If not, contact the manufacturer directly to purchase;, Coupled with the existing 35000 tons/day of reclaimed water reuse (ERP) high industrial water (hgiw), which can be used to control the processing capacity of the production quality of conditioning materials, JTC chemical park has truly realized the maximum utilization of water resources, of which the high industrial water recycling rate can reach about 85%, and the reclaimed water recycling rate can reach 60%

"How can we avoid this kind of phenomenon by using this kind of third-party utility operators for different users? It is a one-stop station that provides industrial water, fire water, demineralized water, cooling water and sewage treatment, as well as public works such as steam, natural gas, pipe gallery, wharf and tank farm. In addition, we should also pay attention to the business model of style and personalized service. Users do not need to build the required utilities by themselves, which can save investment and operation to the greatest extent At the same time, improve the operation efficiency, and facts have proved that this mode is feasible. " Zeng Guangren, senior vice president of public affairs of SembCorp China, told

to achieve results from comprehensive management and control

considering the importance of Xinsheng water plant and Jurong Island to Singapore in terms of water supply and chemical safety production, the Singapore government implements military level security management for them. Every visitor who enters must report to the Singapore Public Utilities Bureau and Jurong Island authority for approval in advance, exchange for a pass with a valid certificate, and enter after strict security inspection, And no photos are allowed in the area

according to the interview, the Singapore government has implemented the most stringent quality management and discharge standards in the world for water treatment, including fresh water. For example, the purity of the new water produced by Xinsheng water plant using membrane technology is much higher than the standard of ordinary drinking water, and it can only be filled and drunk after special "salt adding" treatment

in addition to strict quality management standards, the Xinsheng water plant adopts the most advanced intelligent management and control system, which can be rated as one of the most automated water treatment plants in the world. The water plant covers an area of about 50000 square meters, and only 16 employees are responsible for daily operation and maintenance. The system of four shifts and two shifts is implemented, and only two employees are required to be on duty each shift, which minimizes the human resource cost of the water plant

in addition, in terms of water prices, the Singapore Public Utilities Authority adopts the international open bidding system. According to the introduction, the bidding price of Xinsheng water plant in the first year of operation is S $0.28/ton, and the bidding price of seawater desalination water plant in the first year of operation is S $0.91/ton. After that, it will be adjusted accordingly according to the consumer price index, but so far there is no relevant public data

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