Pretreatment device for raw water of artificial wetland and pretreatment process for raw water of artificial wetland
A pretreatment device and artificial wetland technology, applied in water/sewage treatment, oxidized water/sewage treatment, water/sewage treatment equipment, etc., can solve problems such as blockage, achieve no flow loss, reduce land occupation, and save sewage Effect
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Embodiment 1
[0046] The artificial wetland pretreatment process using the above-mentioned device includes the following steps:
[0047] 1) Prepare the raw water with an ammonia nitrogen concentration of 20mg / L and a suspended particle concentration of 370mg / L, flow it tangentially into the above device at a flow rate of 12m / s, and flow through the spoiler to accelerate the flow rate of the raw water, changing from laminar flow to turbulent flow;
[0048] 2) The oxidizing agent is regularly added to the dosing port, and the amount of the oxidizing agent is controlled by the ammonia nitrogen content in the effluent reaching a specified value. In this embodiment, the oxidizing agent is sodium hypochlorite powder, and the dosage is 12 mg / L;
[0049] 3) When the raw water flows through the cylindrical separation chamber, the suspended particles with a higher density than the fluid can overcome the hydraulic resistance and move toward the central axis of the pretreatment device to form a central ...
Embodiment 2
[0052] The artificial wetland pretreatment process using the above-mentioned device includes the following steps:
[0053] 1) Prepare the raw water with an ammonia nitrogen concentration of 30mg / L and a suspended particle concentration of 540mg / L, flow it tangentially into the above device at a flow rate of 12m / s, and flow through the spoiler to accelerate the flow rate of the raw water, changing from laminar flow to turbulent flow;
[0054] 2) The oxidizing agent is regularly added to the injection port, and the amount of the oxidizing agent is controlled so that the ammonia nitrogen content in the effluent reaches a specified value. In this embodiment, the oxidizing agent is sodium hypochlorite powder, and the dosage is 16 mg / L;
[0055] 3) When the raw water flows through the cylindrical separation chamber, the suspended particles with a higher density than the fluid can overcome the hydraulic resistance and move toward the central axis of the pretreatment device to form a c...
Embodiment 3
[0058] The artificial wetland pretreatment process using the above-mentioned device includes the following steps:
[0059] 1) Prepare the raw water with an ammonia nitrogen concentration of 40mg / L and a suspended particle concentration of 610mg / L, flow it tangentially into the above device at a flow rate of 12m / s, and flow through the spoiler to accelerate the flow rate of the raw water, changing from laminar flow to turbulent flow;
[0060] 2) The oxidizing agent is regularly added to the injection port, and the amount of the oxidizing agent is controlled by the ammonia nitrogen content in the effluent reaching a specified value. In this embodiment, the oxidizing agent is sodium hypochlorite powder, and the dosage is 20 mg / L;
[0061] 3) When the raw water flows through the cylindrical separation chamber, the suspended particles with a higher density than the fluid can overcome the hydraulic resistance and move toward the central axis of the pretreatment device to form a centr...
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