How to treat domestic sewage?

What are the functions of sewage treatment equipment? What is the principle of sewage treatment equipment?

What are the classifications of sewage treatment equipment?

Below, the editor will introduce to you:

1、 What is sewage treatment equipment? After removing large particle suspended solids and floating debris through the grid, the sewage is transported to the reaction tank for biochemical treatment by gas extraction.

2、 The water quality standards for treated sewage

1 COD (Chemical Oxygen Demand): Below 200mgl

2 BOD 5 (biochemical oxygen demand): 30-40mgl

3、 The process of sewage treatment

1. Grille well → regulating tank → lifting pump room → bioreactor

2. Sludge dewatering machine room → secondary sedimentation tank

3. Disinfection device

4. Fan room

5. Clear water tank

4、 Process Description

1. Initial sedimentation tank - contact oxidation method: The initial sedimentation tank is a vertical flow sedimentation tank, and the upward flow rate of sewage in the sedimentation tank is 0.6~1.2 millimeters per second. The settled sludge is carried by air to the sludge concentration area of wsz-a for aerobic digestion.

The digested sludge enters the hydrolysis and acidification chamber at a speed of 15 meters per minute through an air lift device.

Hydrolysis acidification indoor filling material, in which the material of the filling material is a composite structure of perforated nylon plate and high-strength carbon steel; The specific surface area of the filler is 160mm2, and the water distribution rate is 60%; The air is powered by a fan, which drives the packing to flip up and down to degrade the dissolved pollutants in wastewater.

When most of the organic matter is degraded and flows into the advection zone, the PLC controller adjusts the water quality of the incoming water according to the set pH value and temperature.

When the set value is reached, the PLC controller starts the aeration machine to charge oxygen and starts the operation of the blower; After the effluent quality meets the standard, turn off the blower and aerator.

(Note: If used in industrial wastewater treatment systems, a fully automatic electrical control system must be equipped.)

2. Secondary sedimentation tank biological contact oxidation method: The secondary sedimentation tank is a vertical flow two-stage series anaerobic biological filter tank with an upward flow rate of 0.3-0.5 millimeters per second; The sludge is lifted to the sludge concentration area by air. This area is equipped with elastic three-dimensional fillers, which are made of hollow fiber reinforced plastic honeycomb pipes or porous ceramic pipes made of crushed stones. Microorganisms grow and reproduce in a suspended state (Note: If used in industrial wastewater treatment systems, a fully automatic electrical control system must be equipped.).

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