Wallpaper wastewater treatment equipment

A professional enterprise that produces and sells wallpapers and wallpapers. The wastewater mainly comes from multiple streams of flushing wastewater and ink wastewater generated during the hydrolysis and synthesis of raw materials in various workshops. The main raw materials include raw paperPVCThe wastewater contains complex components, high concentrations, and poor biodegradability, such as foaming agents, inks, solvents, and light diesel oil. Traditional treatment processes are ineffective and cannot meet discharge requirements. Through careful analysis of the raw water quality, repeated demonstration, and multiple experiments, the use of flocculation sedimentation for pretreatment can achieve good pretreatment effects and improve the biodegradability of the wastewater. Combined with subsequentA/OBiochemical processing system+ROMembrane treatmentMeet the national first level emission standards.

The discharged wastewater mainly containsPVCInk, glue, solvent oil, maleic anhydride resin, etc., as well as some raw materials, intermediate products, and product residues, are complex in composition and have poor biodegradability

Wastewater Treatment Process Flow Chart

High concentration wallpaper wastewater

↓

Oil separation regulating tank

↓

sludge ←Coagulation reaction sedimentation tank←Neutralizing agent, flocculant

↓

sludge←A2/OIntegrated device

↓

ROMembrane treatment

↓

compliance discharge

Description of wastewater treatment process

Starting from the top left of the flowchart, the wastewater from the production workshop is collected through a dedicated pipeline and enters the oil separation systemequalization tankAfter adding medication, entercoagulation sedimentation tank. Jingsedimentation tankAfter settling small particles in water, they enteranaerobicHere, microorganisms mainly composed of anaerobic and facultative bacteria decompose and digest organic matter in water, and then flow into it by themselvesContact oxidationpoolInside, and here and fromFinal sedimentation tankThe injected reflux sludge is first mixed and reacted, and then subjected to aerobic biochemical treatment. Wastewater and activated sludge in water flow togetherFinal sedimentation tankPerform precipitation separation to obtain purified supernatantEnter againROMembrane systemconductFilter and adsorb, discharge or reuse the effluent to meet the standard.