With the acceleration of industrialization and urbanization,the problem of algal bloom is becoming
more and more serious.
Nitrogen and phosphorus,as the main culprits of algal bloom,come from a wide range of sources, including
agricultural non-point source pollution,industrial wastewater discharge, domestic sewage discharge and so on.
Excessive nitrogen and phosphorus entering the water body will promote algal blooms,consume oxygen in the water,
lead to deterioration of water quality,affect the survival of aquatic organisms, and even pose a threat to human health.
Therefore, as an important part of environmental protection,nitrogen and phosphorus wastewater treatment project
has been widely concerned and attention.
The following is an overview of our nitrogen and
phosphorus wastewater treatment solutions:
1、Sources of nitrogen and phosphorus in wastewater
2、 Process Flow:
3、Principle of nitrogen and phosphorus
wastewater treatment
The core of nitrogen and phosphorus wastewater treatment is to remove nitrogen and phosphorus effectively
or transform them into harmless forms by physical,chemical or biological methods.
In particular, the principles of treatment can be summarized as follows:
3-1 Biological nitrogen and phosphorus removal
The use of specific microbial metabolic activities,the wastewater of ammonia nitrogen through
nitrification-denitrification process into nitrogen release to the atmosphere,and the conversion of phosphate
into insoluble phosphate sediments,to achieve the removal of nitrogen and phosphorus.
3-2 Chemical precipitation
The removal of phosphorus from wastewater by the reaction of phosphate(3-) in the wastewater with chemical agents
such as iron and aluminum salts to form insoluble phosphate precipitates.
3-3 Adsorption method
The use of porous solid substances (such as activated carbon, zeolite, etc.)in the wastewater of nitrogen,
phosphorus adsorption,to achieve the purification of wastewater.
3-4 Membrane separation technology
Such as reverse osmosis,nanofiltration and other membrane technology,through the selection of
membrane permeability,will be in the wastewater of nitrogen, phosphorus and water separation.
4、System composition
Nitrogen and phosphorus wastewater treatment projects usually consist of Pre-treatment system,
biological treatment system,advanced treatment system,sludge treatment system and control system:
4-1 Pre-treatment system
Including grid,regulating tank,settling tank,etc.,used to remove suspended matter,large particles in wastewater,
regulate water quality and quantity,provide stable conditions for subsequent treatment.
4-2 Biological treatment system
The core part is nitrification and denitrification tank,anaerobic/aerobic tank,through the metabolism
of microorganisms to achieve nitrogen transformation and phosphorus removal.
4-3 Advanced treatment system:
According to the requirements of effluent,chemical precipitation, adsorption, membrane separation and
other units can be selected to further remove nitrogen,phosphorus and other pollutants in wastewater.
4-4 Sludge treatment system
Including sludge thickening, stabilization, dehydration and final disposal of the links,the treatment of
sludge generated in the process to prevent secondary pollution.
4-5 Control system
The whole process of automatic control,including on-line monitoring of water quality,equipment remote
monitoring and fault alarm,to ensure the treatment effect and stable operation of equipment.
5、Implementation steps
The implementation steps of nitrogen and phosphorus wastewater treatment project mainly include
project planning,design, construction, commissioning and Operation Stages
5-1 Project Planning
Clear Project objectives,scale,investment and expected results, feasibility study.
5-2 Project Design
According to the characteristics of water quality,discharge standards and treatment requirements,
design a reasonable treatment process and engineering program.
5-3 Project Construction
Carry out construction according to design drawings and technical specifications to ensure project quality.
After the completion of the project equipment debugging and process optimization to ensure
that the treatment effect to meet the design requirements.
5-5 Project operation and maintenance
After formally put into operation,daily management and maintenance to ensure the stable
operation of the processing system.
Construction site of sewage pond
6、Operation and maintenance
The operation and maintenance of nitrogen and phosphorus wastewater treatment project is the key
to ensure its long-term effective operation.
The operation and maintenance work mainly includes the following aspects:
6-1 Water quality monitoring
Regular monitoring of water quality,grasp the treatment effect,timely adjustment of treatment process.
6-2 Equipment Maintenance
Regular inspection and maintenance of processing equipment to ensure its normal operation and extended service life.
6-3 Sludge treatment
Regulate the sludge produced in the treatment process to prevent secondary pollution.
6-4 Personnel Management
Rtrengthen personnel training and management,improve the skill level and responsibility awareness of the operators.
7、Application area
Nitrogen and phosphorus wastewater treatment project has a wide range of applications,mainly
including but not limited to the following aspects:
7-1 Agricultural Field
It is suitable for the treatment of agricultural non-point source pollution,such as farmland drainage,
livestock and poultry breeding wastewater,to reduce the impact of nitrogen and phosphorus loss
on water environment.
7-2 Industry
widely used in chemical, textile, printing and dyeing,pharmaceutical and other industries wastewater treatment,
especially those containing high concentrations of nitrogen and phosphorus wastewater,such as fertilizer plants,
slaughterhouses, etc...
7-3 Municipal wastewater treatment
In urban Sewage Treatment, nitrogen and phosphorus wastewater treatment projects are an important means
to improve the level of wastewater treatment and the quality of effluent.
7-4 Landscape Water Restoration
For urban landscape water polluted by nitrogen and phosphorus (such as lakes, rivers, constructed wetlands, etc.),
through the implementation of nitrogen and phosphorus wastewater treatment projects,it can effectively remove the nitrogen and phosphorus elements in the water body and restore the natural ecological function
and landscape value of the water body.
The invention is applied to the field of livestock and poultry breeding wastewater
