3. Wanders (688 178): The company is mainly engaged in garbage pollution reduction and remediation business and refractory wastewater treatment business.
4. Wanbangda (300055): The company is a professional industrial water treatment service provider, providing comprehensive and life-cycle services for large-scale projects in downstream industries such as coal chemical industry, petrochemical industry and electric power. Including all-round services of system construction and system operation services, to meet customers' demand for industrial water such as pure water, circulating cooling water and desalted water in production and operation, to meet the environmental protection standards of water treatment, and to save resources and reduce costs for customers and society through their own professional and technical capabilities. The company has become a well-known industrial water treatment system service industry with its excellent design and project management services, and is known as an industrial water system doctor.
5. Shanghai Xiba (603200): The company's main business is water treatment service and air duct cleaning. The company's water treatment business includes chemical sales and service, operation and management of water treatment system, sales and installation of dosing equipment, and integration of water treatment equipment, covering the overall solution of water treatment system from construction to operation.
6. Shanghai Environment (60 1200): The company is mainly engaged in the investment, construction and operation of environmental municipal projects such as solid waste disposal and urban sewage treatment. The company's sewage business is mainly municipal sewage treatment business, including the construction and operation of domestic sewage treatment plants. The company's sewage treatment plants are located in Shanghai and Chengdu respectively. Longhua Water Purification Plant, Minhang Water Purification Plant, Changqiao Water Purification Plant and Youlian Bamboo Garden located in Shanghai treat 6.5438+0.76 million tons/day of urban sewage in Shanghai, of which Youlian Bamboo Garden is the second largest sewage treatment plant in Shanghai.
7. Donghua Science and Technology (002 140): The company has strong technical advantages in the field of industrial wastewater treatment, and has many practical technologies such as high salinity wastewater treatment, high concentration organic wastewater anaerobic treatment, PTA wastewater treatment, A/O treatment and acrylic fiber industrial wastewater treatment. More than 0/000 environmental pollution control projects have been completed, and nearly 20 national, provincial and ministerial scientific and technological progress awards have been won. The company successfully completed the "zero discharge" project of chemical fertilizer wastewater from China Coal Tuke, which established the company's leading position in the field of "zero discharge". On the evening of 17, 12 and 14, the company and tianye formally signed the general contract for the air separation unit, boiler unit, desalted water and sewage treatment unit of the first phase of the ethylene glycol project of Xinjiang tianye co., ltd. 100 tons/year, with the contract price of 65438+. The smooth performance of the contract will have an impact on the company's operating income and performance in 20 18 and 20 19.
8. Oriental Garden (0023 10): Shanghai Liyuan, a subsidiary company, is mainly engaged in the research, development, manufacture and application of water treatment technologies, processes and equipment, while Zhongshan Environmental Protection is mainly engaged in the construction of sewage treatment projects and the operation of sewage treatment facilities. Both subsidiaries have been operating in their respective fields for many years, and have accumulated strong competitive advantages in technology, market and management. They have strong synergy with the company in terms of customer resources, technology integration, product diversification, project implementation and raw material procurement, which is conducive to the company's accelerated development of water treatment business, further improving the company's market share in the field of ecological governance, and laying the foundation for the rapid development of the company's ecological governance business.
9. dongjiang environmental protection (002672): The company issued asset-backed securities based on the income right of Humen Luyuan sewage treatment fee, and actually raised 300 million yuan, which was the first PPP+ABS business in Guangdong Province and Shenzhen Stock Exchange;
10. Zhongyuan Environmental Protection (000544):20 17 years, the company has 13 water operation units. On the premise of ensuring safe production and discharging up to standard, we should carry out external water survey, optimize internal control technology, and allocate resources scientifically. Sewage treatment reached a new high, with 4,630,650 sewage treated in the whole year. The company's main business is urban sewage treatment and urban central heating, and its business is regional, with Zhengzhou as its main business area. The company's market share in this area is 50% for sewage treatment and 35% for heating. Zhongyuan Environmental Protection Water Dengfeng Co., Ltd. is a wholly-owned subsidiary of the Company, which was acquired and operated by TOT. The design scale of the plant is 30,000 cubic meters of sewage/day, and the treatment process adopts the improved SBR process. The service scope covers the downtown area of Dengfeng, with a service area of about 10 square kilometer and a service population of about10.5 million.
1 1. Zhong Jian Huaneng (300425): the largest manufacturer of magnetic separation water purification equipment in China, mastering the core purification technology and having rich experience in treating black and odorous rivers; In 20 17, the income from environmental protection business was 594 million yuan, and the income from centrifuge business was 2110 million yuan, accounting for more than 99% in total. Relying on magnetic separation water purification technology, combined with biochemical treatment technology, bio-ecological water restoration technology, membrane technology and other applicable technologies in the field of sewage treatment, the company provides customers with complete sets of sewage treatment equipment, operation services, general contracting services and overall solutions.
12. Zhongzhi shares (603903):1811. 10, the company won the bid for the second phase of MFA (predecessor of Mercedes-Benz) production auxiliary facilities area-sewage treatment system project, with the winning bid amount of 5330150,000 yuan. It has 52 patented technologies such as "Two-parameter aeration control system for sewage treatment system", "sequencing batch sewage treatment device" and "combined treatment system of internal circulating biological aerated filter and clarifier", and the software copyright is 14. As well as proprietary technologies such as industrial wastewater Advanguard treatment, second-generation improved BAF technology, SG-MixerDrum sludge alkaline stable drying technology, municipal sludge grading and phase-separated anaerobic digestion technology, SG-DACT drum dynamic aerobic high-temperature fermentation technology. Many technologies have been listed in the national key environmental protection practical technology list. In addition, the company's R&D team has undertaken R&D projects such as the National 863 Plan, the National Water Project and the Beijing Municipal Science and Technology Commission, and the company's technological innovation advantages have been widely recognized. Based on the third-party operation and management services of environmental infrastructure, the company adopts the replicable model of "medium assets, heavy service and regional management" to carry out business activities in the fields of environmental development strategy consultant, investment and financing of sewage treatment plants, construction and upgrading of sewage plants, construction of sludge associated with sewage plants and sales of core technology products.