Located at the plant with a processing capacity of 500,000 m3/d on the west side of Zhuyuan, Bid ZYSQ 1.3 for Phase IV project of Zhuyuan Sewage Treatment Plant mainly include the following tasks: Construct a new AAO biological reaction tank with a capacity of 500,000 m³, a horizontal sedimentation tank and other buildings / structures; adopt the five-axis mixing pile, the composite steel pipe pile through PC construction method, the UHPC ultra-high performance concrete, and other emerging technologies. In this project, STEC applied the prefabrication and assembly technology on large scale and in large volume for the first time into the field of water utilities engineering. While ensuring the project quality and controlling the project risk, STEC also accumulated important experience for the engineering application of prefabrication technology into the future water utility industry.
Since the commencement, the project department has been awarded many honors, such as Shanghai Civilized Construction Site, Shanghai Green Model Construction Site, Shanghai Five-star Construction Site, Feature Project in Practical Achievements Competition among Major Projects in Shanghai, Excellent Team, etc.

The bid TP1.3 for initial rainwater regulation project of Taopu Sewage Treatment Plant mainly involves the rainwater collection pipeline system on the east side of Zhenjiang Village and at Zhenguang Village, which adopt the construction technologies of shield tunneling method and pipe jacking method.
All of the work shafts in this project are located at the intersections of municipal roads, and surrounded by many communities, busy commercial zones, large traffic flow and complex pipelines. In order to minimize the impact on surroundings, STEC optimized the construction technology and well structure. The project department actively connected with the local stakeholders, optimized the construction site and traffic organization, and substantially reduced the road area occupied by each shaft; the project department also canceled one pipe jacking shaft and two inspection shafts. That eases the surrounding traffic pressure and provides a reliable guarantee for orderly operation of Shanghai Municipality.

The project sees a total investment of about CNY 701 million yuan. Its main construction contents include water intake engineering, water distribution network and water purification plant project. Its water source is located in the main stream of Xiangjiang River at Wanhe Village in Jinghe Township, with a construction length of 34.73 km and a water supply capacity of 100,000 m³/d.
Since the full commencement of Xiangyin Water Supply Plant project on March 6th, 2021, the project team confronted many difficulties, such as large workload, multiple units and tight construction period. They deployed the backbone, remained on the construction site, and successively overcame a series of difficult nodes, such as temporary land acquisition, river crossing, house demolition and relocation, and operation under high-voltage power lines.Upon its operation, the project will comprehensively increase the water supply quality and capacity in urban and rural areas of Xiangyin, promote the penetration rate of rural tap water, and enhance the weak link in drinking water facilities of Xiangxian County. The project will also reinforce the ability to ensure safe drinking water so that 400,000 urban and rural residents in Xiangyin can drink safe water. As a key livelihood project in the urban and rural water supply integration strategy, the project will play a crucial role in coordinating urban and rural development and accelerating rural revitalization in Xiangyin.

The 2021 comprehensive small watershed improvement project for clean eco-system in Huinan Town involves five aspects, namely river and lake system treatment, non-point source contamination control, comprehensive prevention and control of soil and water loss, ecological restoration, and living environment improvement. It mainly covers 80 reaches of river courses in Huinan Xiaohuangpu and Laogang River, 10 groups and 1 tributary in Yuandong, 5 groups and 1 tributary in Yuandong, etc.
The project team adopted water reoxygenation technology to aerate the river course. By improving the ecological environment in the local waters, the team restored the aerobic microbial community and thus ensured the survival of plankton and fish. By virtue of the biological seine technology and the principle of biological pollution control, plants were able to absorb nutrients in the water and to form biofilms to purify water. The team adopted biological seine as a framework to control the growth area of plants so as to avoid the secondary contamination caused by floating plants growing uncontrollably in the water. They employed a plant-floating bed technique, and planted aquatic plants, such as reeds, on the water surface. Those plants are effective in suppressing phytoplankton, improving water transparency, and lowering COD. While purifying water, they can create habitats for birds, fish and other living beings, and improving the landscape.
The comprehensive small watershed improvement project for clean eco-system works as an important basic project for the local government to implement the rural revitalization strategy. It is of great significance to prevent and control soil erosion, promote ecological restoration and protection of rivers and lakes, improve overall agricultural productivity, facilitate the development in green industry, and construct the rural development pattern of harmonious co-existence between man and nature.

Channel improvement of Chuangxin River in Zhangjiabang Wedge Green Belt (Cuibai Road - Niuqiao Port) and Niuqiao Port (Majiabang - Guanglan Road) is located in Jingang Road of Pudong New Area. The improvement center covers a total length of 1,152 m, among which the length of channel to be improved in the Chuangxin River is 529.2 m. The reach starts from Cuibai Road in the north and ends at Niuqiao Port in the south. The length of channel to be improved in Niuqiao Port is 622.8 m, which starts from Majiabang and ends at Guanglan Road. In this project, STEC constructed about 2, 300-meter revetment, 3,000-meter flood control channel and 13,800-square-meter green space.
The improved Chuangxin River in Zhangjiabang Wedge Green Belt and river channel at Niuqiao Port demonstrate the unique landscape charm of ecological banks with their brilliant ecological appearance. Meanwhile, the project can revitalize the regional water systems, create a natural, comfortable and pleasant river landscape, and further improve the regional capacity for flood control, water logging removal, irrigation regulation and storage. It not only enhances the natural environment on the surrounding land but also "refresh" the life of local residents.

The sewage connection project between Zhuyuan and Bailong Port involves a new 19-km inter-plant pipeline with a capacity of 800,000 m3/d and two new terminal lift pump stations. The project connects the Bailong Port Sewage Treatment Plant and Zhuyuan Sewage Treatment Plant via pipeline and pump station so as to realize the complementary capacity between sewage treatment facilities in this region. The project, upon its completion, can connect two sewage treatment systems in Zhuyuan and Bailong Port. It can play multiple functions, such as cross-area emergency dispatch and water allocation, and enhance the functional resilience of sewage transmission and treatment system.
In the sewage connection project ZB1.2 (pipeline engineering) between Zhuyuan and Bailong Port, a new pipeline of 9,142 m was newly constructed. The longest jacking path is 1,057.5 m. The project penetrates 11 bridges, 2 high-pressure gas pipes, 2 overpasses in Gaodong, 1 water pipe at Qingcaosha and 1 aviation gas pipe. During the jacking process, the advanced non-constant flow simulation technology with full conservation of mass was adopted to overcome the technical difficulty in intermittent operation of gas-liquid two-phase flow. Simultaneously, the pipeline structure health monitoring system was used to conduct on-line monitoring for pipelines with large diameter and long conveyance distance so that the pipeline structure status can be perceived accurately.

The project is located at Gaoming District, Foshan City, Guangdong Province, and covers a total area of 6, 961.8 m2. Centering on the development theme of “energy + technology towards carbon neutrality”, the project creates an integrated station for hydrogen production from natural gas and in-station hydrogen refueling. Among them, the hydrogen production module adopts the first set of skid-mounted natural gas-hydrogen production facility in China with independent intellectual property rights. It is designed to construct a comprehensive energy supply station integrating natural gas hydrogen production, photovoltaic power generation coupled with water electrolysis hydrogen production, hydrogen refueling, gas feeding and other functions.
In December 2021, the natural gas-hydrogen production facility successfully produced highly pure hydrogen, with the highest hydrogen purity up to 99.999% worldwide. In August 2022, the Phase I of the project was officially put into operation. It has filled the gap in the domestic industry and been reported with a feature story by CCTV news channel.

The project mainly includes the gasoline and natural gas (LNG) refueling unit and the hydrogen refueling and natural gas (CNG) refueling unit. The project include the principal technology of a jointly constructed station as well as the civil, electrical, automatic control, water supply and drainage, fire and other relevant public supporting facilities. The station can provide refueling services for 20 new energy vehicles simultaneously, and thus form a four-in-one three-dimensional energy services for “hydrogen refueling, LNG refueling, gasoline refueling and recharging”. The project adopts the construction mode that integrates multiple stations. In addition to its intensive land usage, it is also featured by its high efficiency, green attribute and friendliness. It explores a development path of organic integration of charging station and traditional refueling and natural gas station. The project will accelerate the development in new energy vehicle industry and strive to become an energy demonstration case that can be replicated and promoted, so as to accumulate experience for similar projects in the future.
The project succeeds in "three firsts", namely the first “primary (station) with standard (station)” project for compressed natural gas station in China, the first integrated gasoline, natural gas, hydrogen and electricity energy project in Jiangsu Province, and the first mounted (overhead) refueling project in Jiangsu Province.

This project works as a supporting equipment of the supporting facilities for hydrogen supply and storage for pilot production line with an annual capacity of 1,000 sets of fuel cell bipolar plates and cell stacks of Ningbo Lvdong Fuel Cell Co., Ltd. under SPIC. The project comprises new supporting facilities for hydrogen supply and storage that provides 35-MPa high-pressure hydrogen refueling service. Its daily hydrogen refueling capacity is 500 kg and can meet the refueling demands of 20 buses with hydrogen fuel cells. The project is located at the SPIC Hydrogen Energy Industry Project Base in Cidong Binhai Economic Development Zone, Longshan Town, Cixi City. The station adopts a non-fixed cylinder pack assembly and the dual external transmission scheme of direct pipeline supply and vehicle refueling. It has the advantages of less land, low construction costs, good security, small staffing and low operation costs. The fuel cell pilot production line project serves as not only a key initiative for SPIC to respond to the national hydrogen energy strategy and to open up the hydrogen energy industry chain, but also the concrete embodiment of the "three innovations" and “industrialization, marketization and scale expansion” of the hydrogen energy strategy implemented by STEC Shanghai Energy Construction Group Co., Ltd.

This project is a key project for the joint development in hydrogen energy by Petro China and Shanghai Shenneng Group. It is a demonstration station and benchmark station for hydrogen energy utilization in Lingang New Area of Shanghai. The project is located on the north of the intersection between Pingxiao Road and Zhenglang Road in Lingang New Area, Situan Town, Fengxian District, Shanghai Municipality, covering an area of 2,900 m2. The hydrogen system of this project adopts the design of 50-MPa hydrogen storage and distribution. The hydrogen storage scale is 800 kg. It adopts a dual machine refueling mechanism. The gasoline refueling system adopts four sets of 30-m3 vacuum dual capacity pipe and four machine dual fuel and four-gun scheme. The station is also established with two fast charging parking lots. The project has the advantages of small footprint, good economic benefits, energy saving and environmental friendliness. The successful operation of this project not only improves the standardized management level of STEC Shanghai Energy Construction Group Co., Ltd. but also provides high-quality engineering design and management services for Petro China and Shanghai Sheneng.

Located in Foshan City, Guangdong Province, the project comprises a pipeline as long as about 23 km, the expansion of Xiqiao pressure-regulating station, and the construction of Jinben pressure-regulating station. The total investment of this bid section is about CNY 525.16 million yuan. The project will be connected with the existing high-pressure pipe network system in Foshan, so as to construct a north-south gas transmission channel and to connect the downstream urban medium-pressure transmission and distribution system. The project will meet the gas demand from various urban gas users in this region, strengthen the stability and security of gas supply, and facilitate the development in low-carbon energy.

The designed daily hydrogen refueling capacity of the project is 1000 kg. The project has been constructed in two phases. Phase I hydrogen refueling station saw a total investment of CNY 12 million yuan and covered an area of about 4,000 m2, which includes compressor, hydrogen storage cylinder, hydrogen refueling machine, water chiller and other devices. This project has acquired the first Hydrogen Cylinder Refilling License among hydrogen refueling stations in Qingdao City, and been the first completed hydrogen refueling station at a port in China at present. The project has gone through all the completion acceptance and qualification procedures for planning and fire control, and been operated under full qualification and license. This station, upon its operation, has successfully met the demand from vehicles for hydrogen refueling in Qianwan Port Area of Qingdao Port in Shandong Province. It plays an demonstrative and leading role in the construction of "hydrogen port in China".