english 1. Sewage properties
Water quality characteristics: including the acidity and alkalinity (pH value), temperature, suspended solids concentration, dissolved organic matter content, etc. of the sewage. For example, acidic or alkaline sewage may require the selection of an Air floatation device with corrosion-resistant materials; sewage with high suspended solids concentration requires the Air floatation device to have a larger processing capacity and a suitable flocculant dosing system.
Type of pollutant: Different types of pollutants have different effects on the flotation effect. For oily sewage, it is necessary to select an Air floatation device that can effectively generate small bubbles and enable oil droplets and bubbles to attach well; for sewage containing fine suspended particles, such as printing and dyeing wastewater, a more sophisticated air dissolution and release system may be required to improve the efficiency of the combination of particles and bubbles.
2. Treatment scale
Water volume: According to the designed treatment water volume of the sewage treatment plant, select an Air floatation device with appropriate treatment capacity. For large sewage treatment plants, it is usually necessary to select air floatation equipment with large processing capacity and stable operation, such as large pressurized dissolved air Air floatation device; while for small sewage treatment plants or industrial enterprises, small air floatation equipment with compact structure and small footprint can be selected.
Flow rate change: The change range of sewage flow is also an important factor in selecting Air floatation device. If the flow rate fluctuates greatly, it is necessary to select an Air floatation device with strong adaptability, which can maintain a stable treatment effect under different flow rates.
3. Site conditions
Spatial layout: The size and installation method of the Air floatation device need to match the spatial layout of the site. If the site is limited, it is necessary to select air floatation equipment with small footprint and compact installation, such as integrated Air floatation device; and in a site with more spacious space, a larger, decentralized air floatation system can be considered.
Environmental requirements: The environmental conditions of the site, such as whether there are residential areas around, noise and odor control requirements, etc., will also affect the selection of Air floatation device. For places with high environmental requirements, air floatation equipment with low operating noise and no odor should be selected, and corresponding environmental protection measures such as deodorization devices and soundproof covers should be equipped.
4. Economic factors
Equipment cost: The prices of Air floatation devices of different types and specifications vary greatly, and it is necessary to make comprehensive considerations based on the project budget when selecting. At the same time, the cost-effectiveness of the equipment should be considered, and air floatation equipment that can meet the treatment requirements and has good economy should be selected.
Operation cost: including energy consumption, reagent consumption, equipment maintenance and maintenance costs, etc. For example, the energy consumption of pressurized dissolved air Air floatation device is relatively high, while the energy consumption of jet Air floatation device is low, but the reagent consumption may be relatively large. It is necessary to comprehensively analyze the operating costs of various Air floatation devices and select the equipment that best suits the actual situation of the project.
