The listed companies in the sewage treatment industry are as follows:

1. Zhonghuan Environmental Protection (311692): As an integrated service provider for urban sewage treatment and industrial wastewater treatment, the company's main business is sewage treatment business and environmental engineering business, and it can provide system-wide services including research and development, design consultation, engineering construction, investment and operation of sewage treatment-related technologies and products.

2. Greentown Water (611368): Since its establishment, the company has obtained the franchise rights of urban water supply and sewage treatment in Nanning granted by the Nanning Municipal Government and the franchise rights of sewage treatment in five counties (Binyang County, Hengxian County, mashan county County, Shanglin County and Wuming County) granted by the five county governments under the jurisdiction of Nanning, with the franchise period of 31 years. Understand the contents of the lottery number in Greentown Water Affairs.

3. Guozhen Environmental Protection (311388)? The company's main business is domestic sewage treatment, which is divided into three parts-domestic sewage treatment investment operation, environmental engineering EPC and sewage treatment equipment production and sales.

the company can provide customers with "one-stop six-dimensional service" for domestic sewage treatment, including research and development, design consultation, core equipment manufacturing, system equipment integration, engineering construction, installation and commissioning, sewage treatment plant operation and other all-round services needed to control water pollution.

4. Qingshuiyuan (311437): The company invested RMB 115 million to build an expansion project with an annual output of 31,111 tons of water treatment agent. The project is to expand the production capacity of 31,111 tons of water treatment agent on the basis of the company's existing production capacity of 61,111 tons. After the project is put into production, it will consolidate the company's position in the field of organic phosphine water treatment agent, and expand the output of polymer water treatment agent and compound products. It is estimated that the annual sales income will be 159.6214 million yuan and the annual net profit will be 22.7739 million yuan.

5. Dr. Bosch (311422): During the implementation of specific projects, the company provides customers with an integrated system of pollution control facilities or implements environmental restoration projects according to the characteristics and treatment requirements of sewage, and designs and manufactures targeted or customized sewage treatment equipment.

among them, the main core technologies and equipment systems are upflow multistage anaerobic reactor (UMAR), upflow multiphase wastewater treatment oxidation tower (UHOFe) and chlorine dioxide preparation system.

6. Annoqi (311167)? In August, 2113, the company acquired 81% equity of Jiangsu Yongqing Chemical Company for 21 million yuan and increased its capital by 24 million yuan, thus directly obtaining the production capacity of 6,511 tons of reactive dyes of Yongqing Chemical Company. Yongqing Chemical Industry, as a leading enterprise in the domestic regional reactive dye industry, has a wide brand awareness.

extended information

sewage treatment: the process of purifying sewage to meet the water quality requirements of being discharged into a certain water body or reused. Sewage treatment is widely used in construction, agriculture, transportation, energy, petrochemicals, environmental protection, urban landscape, medical care, catering and other fields, and it has also entered the daily life of ordinary people more and more.

No matter from the perspective of resources or water environment, to solve China's water problems by itself, there must be a regional solution, not a point source solution. Technological progress and changes in social structure have promoted this group-based and decentralized scheme, which is contradictory in itself, just the contradiction and unity between them, and put forward the inherent demand of the whole industry to realize regional integration.

Anhui Zhonghuan Environmental Protection Technology Co., Ltd. official website-Entering Central

Guangxi Greentown Water Co., Ltd. official website-Company Profile

Anhui Guozhen Environmental Protection and Energy Saving Technology Co., Ltd. official website-Company Profile

Henan Qingshuiyuan Technology Co., Ltd. official website-Group Profile

Guangxi Boshiko Environmental Protection Technology Co., Ltd. official website-Enterprise Profile

Shanghai Annoqi Group Co., Ltd. official website-Group Profile.