Wastewater reuse process and device

Abstract

The invention provides a wastewater reuse process and device. The wastewater reuse process comprises the following steps: S1, wastewater is fed into a triple-combination concentration tank; S2, flow-out wastewater enters a CMF (continuous membrane filtration) treatment system for primary filtering treatment; S3, wastewater collected in a CMF water production tank flows through an active carbon filter and a cartridge filter sequentially for secondary filtering treatment; S4, wastewater subjected to secondary filtering treatment is treated in a reverse osmosis device and flows into a reverse osmosis production tank. The wastewater reuse process and device have the following advantages: (1) a small area is occupied, civil engineering investment is small, and a high-density tank, a V-shaped filter tank and a middle water tank are not needed; (2) multi-media, ultrafiltration, matched equipment, chemicals and consumables are omitted, and the cost is lower; (3) reuse treatment of VRLA (valve-regulated lead-acid) battery wastewater is more targeted; (4) effluent is more stable and operation cost is lower by adopting the CMF treatment system instead.

Description

technical field [0001] The invention relates to the technical field of lead-acid battery wastewater treatment, in particular to a wastewater reuse process and device for lead-acid battery wastewater. Background technique [0002] Lead-acid battery (VRLA) is a battery whose electrodes are mainly made of lead and its oxides, and the electrolyte is sulfuric acid solution. Lead-acid batteries have a wide range of applications, but waste water is generated during their production. [0003] At present, for the treatment of lead-acid battery wastewater, the suspended particles in the water are mainly removed by high-density pool + V-type filter combined sedimentation and filtration, and then lifted by the water pump into the multimedia filter to further remove colloids and suspended solids, and then activated carbon filter Remove residual chlorine, oxides and organic matter in water, reduce the COD value and residual chlorine value of influent water, and avoid RO membrane contamin...

AI Technical Summary

Problems solved by technology

[0005] (1) It covers a large area and requires a large number of supporting equipment for dosing, backwashing, air washing, and cleaning, and the project investment is huge

[0006] (2) The inclined tubes and ultrafiltration membranes of the sedimentation tank are prone to frequent fouling. At the same time, the V-shaped filter and the multi-media packing need to be replaced regularly

[0008] (4) There is no specificity to lead-acid battery wastewater, and heavy metal ions such as lead in wastewater cannot be effectively removed

[0009] (5) The system is complex, and manual operation and management costs are high

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