In order to do a good job in the comprehensive management of coastal waters, the province issued the "Implementation Plan for the Comprehensive Management of Adjacent Seas of the Pearl River Estuary" and other documents to clarify the assessment objectives of the city during the "14th Five-Year Plan" period. The Municipal Bureau of Ecology and Environment actively implements the work requirements of the Provincial Department of Ecology and Environment, and carries out the treatment of coastal waters with the treatment and control of total nitrogen entering the sea as the core. This year, the annual average concentration of inorganic nitrogen at the state-controlled points in the city's two coastal waters has reached the provincial assessment target
However, due to factors such as the large input of total nitrogen from land-based sources into the sea, the high total nitrogen concentration of the city's main rivers, and the increase of the total nitrogen concentration of cross-border rivers, and the provincial requirements for the assessment of inorganic nitrogen in the city's coastal waters are becoming increasingly strict, the city's future coastal water treatment work is still facing a severe test.
In view of the fact that the concentration of inorganic nitrogen in coastal waters is mainly affected by the total nitrogen from land sources into the sea, the Municipal Bureau of Ecology and Environment will take the reduction of total nitrogen into the sea in the whole basin of the city as the core to do the following work: first, carry out the total nitrogen control of the city's main rivers, formulate annual improvement targets for the total nitrogen of the rivers entering the sea, put forward the total nitrogen control targets for key river basins with high total nitrogen concentrations such as the Shima River and the East Diversion Canal, and decompose the total nitrogen reduction task to the responsible towns and streets and include it in the environmental protection responsibility, so as to promote the total nitrogen reduction of the city's surface rivers;The second is to continue to promote the remediation of sewage outlets into the sea, according to the investigation and traceability of sewage outlets into the sea, make a list of classified remediation, formulate remediation implementation plans, and establish a sales number system for sewage outlet remediation;The third is to speed up the completion of infrastructure construction shortcomings and promote the upgrading of total nitrogen in sewage treatment facilities.
The sky is blue and the sea is wide, surging and chasing the waves. In the new year, the Municipal Bureau of Ecology and Environment will adhere to the problem-oriented and goal-oriented, strengthen the overall planning and comprehensive management of land and sea, promote the steady improvement of the marine ecological environment, and ensure that the water quality of the coastal waters is stable and improving.
Extended reading: 1. As the main sewage channel in Dongguan, the East Diversion Canal begins from the Jiantang Sluice in Qiaotou Town, flows through 20 towns and streets (parks) in our city, and after undertaking the sewage of the Shima River Basin and Hanxi River Basin, it mainly enters the sea through the Humen Sluice, which is about 5-10 kilometers away from the national examination center in the city's two near-shore sea areas. In addition, the East Approach Canal also drains water to the south tributary of the Dongjiang River through the sluices along the line, and finally joins the Shiziyang.
2. Total nitrogen is the sum of nitrogen-containing substances in the water environment, including inorganic nitrogen and organic nitrogen, which is mainly used in domestic sewage, urban non-point source pollution, industrial wastewater from food, papermaking, printing and dyeing industries, agricultural pollution, etc. Inorganic nitrogen is the main stable form of nitrogen in water bodies, including ammonia, nitrate, and nitriteOrganic nitrogen is not easy to exist stably in water for a long time, including proteins, nucleic acids, amino acids and other nitrogen-containing substances. The main source of marine inorganic nitrogen is the total nitrogen input in the terrestrial area, and all nitrogen-containing substances in the water environment are converted into each other.