Process system for removing ammonia nitrogen/alga in surface water by enhancing conventional treatment

Abstract

The invention discloses a process system for removing ammonia nitrogen / alga in surface water by enhancing the conventional treatment. The process system for removing the ammonia nitrogen / alga in the surface water by enhancing the conventional treatment comprises a mixed reaction precipitation system, an air floating system, an adaptive ferromanganese medicament adding system, a chemical auxiliary oxidation system, an unpowered mixed aeration system, a filtering system and a sterilization system. The process system for removing the ammonia nitrogen / alga in the surface water by enhancing the conventional treatment effectively integrates multiple technologies of adaptive ferromanganese medicament adding, air floating separation, microbubble mass transfer aeration, unpowered mixed aeration, natural oxidation, chemical oxidation, interception and filtration, chemical adsorption, chemical contact catalytic oxidation and the like for synergistically removing ammonia nitrogen, alga, turbidity and chromaticity in a water source, has the advantages of high removal efficiency, high treatment speed, no side product in a reaction process, low construction investment, low running cost, low implementation difficulty and the like and is applicable to design of a new surface water plant, and upgrading and transformation of the existing surface water plant can be easily implemented.

Description

technical field [0001] The invention belongs to the technical field of drinking water treatment, and mainly relates to a technical method for removing ammonia nitrogen / algae by intensified conventional treatment of surface water, in particular to a process system for intensified conventional treatment of surface water to remove ammonia nitrogen and algae . Background technique [0002] With the rapid development of industry and agriculture in my country and the acceleration of urbanization, the discharge of industrial wastewater and urban sewage continues to increase, which aggravates the pollution of surface water sources such as rivers, lakes, reservoirs, etc., making them appear rich in varying degrees. The trophic state, and the resulting algal blooms or outbreaks, has attracted widespread attention in the field of water treatment. [0003] Excessive algae content will affect the water quality, increase the difficulty of water treatment and increase the cost of treatment...

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Problems solved by technology

[0004] Ammonia nitrogen pollution of water sources not only brings water quality problems, but also puts forward higher requirements and new challenges for water purification process

However, the current conventional water purification process cannot effectively remove ammonia nitrogen and algae in water. The treatment technology for single pollution indicators of ammonia nitrogen and algae is relatively mature, but there are few reports on the efficient integration and safe removal of ammonia nitrogen and algae.

[0005] At present, the common ammonia nitrogen treatment methods mainly include adsorption removal method, breakpoint chlorination method and biological denitrification method, etc. Among them, the adsorption removal method is rarely used because of its disadvantages such as high construction and operation costs and difficult operation and management; Although it can remove ammonia nitrogen in water, the risk of disinfection by-products will increase with the increase of chlorine dosage, which will lead to a decrease in water quality safety; The removal rate can reach more than 80%

However, the algae removal methods in water plants mostly use chemical pre-oxidation, enhanced coagulation, air flotation, biofilm pretreatment, etc. Among them, although chemical pre-oxidation has a good algicidal effect, it is easy to cause algae cells to rupture and release intracellular pollution. and increase the generation of disinfection by-products; although enhanced coagulation can remove algae without destroying algae cells, due to the low density of algae, the sedimentation removal efficiency is low, and the consumption of chemicals is large; the air flotation method adopts The adhesion of microbubbles drives algae to float upwards, which has a higher removal efficiency for algae, but has no effect on ammonia nitrogen removal; biofilm pretreatment can use its adsorption, retention and biodegradation to remove algae in water. The removal rate is more than 50%, and the removal rate of ammonia nitrogen is more than 80%, but there are problems such as large construction investment, high operating cost, and great impact on water temperature and water quality, especially for the upgrading and transformation of the conventional treatment process of most of the current water plants , due to conditional constraints, it is very difficult to implement

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