Advanced treatment and reuse technology of car wash wastewater

Abstract

The present invention discloses an advanced treatment and reuse technology of car wash wastewater. The technology comprises the following steps: S1. collecting wastewater to be treated, removing sludge by a grid, and removing oil by an inclined plate; S2. adjusting the pH of the wastewater subjected to sludge and oil removal; S3. performing micro-electrolysis treatment on wastewater after pH adjustment, and conveying the upper-layer wastewater to a unit for downstream treatment process; S4. adjusting the pH of wastewater treated in the step S3, discharging suspended solids and floating flocksin the wastewater to a sludge pool; S5. pumping supernatant wastewater treated in the step S4 to a cyclone filter system for further solid-liquid separation; and S6. enabling wastewater treated by a rotary filter to pass through multi-stage filtration systems such as a micro filtration system, an activated carbon adsorption system, an ultrafiltration system, and a nanofiltration system in sequence, and guaranteeing outgoing water to meet the drinking water standard. The technology has reasonable design and high practicability, can realize automation work, and is simple to operate and suitablefor promotion.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a process for advanced treatment and reuse of car washing waste water. Background technique [0002] With the rapid growth of national economic income, my country's car ownership has grown rapidly. Car washing consumes a lot of water, and car washing wastewater contains a large amount of pollutants such as oil, organic matter, and detergent. If it is discharged directly without treatment, it will inevitably pollute the water body. Therefore, the advanced treatment and reuse of car wash wastewater in the automotive service industry has become an urgent problem to be solved. [0003] Chinese invention patent CN105399230A discloses a car wash wastewater circulation system. Its disadvantage is the lack of pretreatment, multi-stage membranes, especially reverse osmosis membranes, are easily polluted, and the operation and maintenance costs must be high; Chin...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned defects and provide a process for the advanced treatment and reuse of car wash wastewater. The system can further accelerate the removal of suspended solids in wastewater. The RO-free multi-stage membrane filtration system effectively guarantees good effluent water quality, large amount of treated water, and ensures that the water body does not contain peculiar smell, which is conducive to car washing recycling water and improves the working environment. , at the same time, this treatment process has strong practicability, can realize automatic work, is easy to operate, and is suitable for popularization