Circuit board wastewater treatment system
A technology for wastewater treatment and circuit boards, which is applied in water/sewage treatment, biological water/sewage treatment, neutralized water/sewage treatment, etc. It can solve the problem of high operating costs, lack of effective resource recovery, and complicated wastewater treatment processes. problems, to reduce costs
Active Publication Date: 2020-06-19
BEIJING JIAOTONG UNIV
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Problems solved by technology
[0002] In the process of circuit board production, a large amount of wastewater containing copper ions will be produced. Except for some wastewater that is treated separately, most of the wastewater will be collected and treated centrally. The concentration of copper ions in this part of wastewater is 200-300 mg / L, which needs to be treated to achieve Discharge requirements, but most of them are treated by dosing precipitation method, which not only produces a large amount of copper-containing sludge, but also fails to realize the effective recovery of resources. At the same time, the wastewater treatment process is complicated and the operating cost is high.
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[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0028] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and / or groups thereof. It will be unders...
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The invention provides a circuit board wastewater treatment system. The circuit board wastewater treatment system comprises a primary filtration subsystem, a pH adjustment subsystem, a special ultrafiltration subsystem, a secondary filtration subsystem and a biochemical subsystem, wherein the pH adjustment subsystem is a continuous two-stage adjustment system and is used for generating copper hydroxide sludge, directly outputting the copper hydroxide sludge to the tail end of the system, generating a sludge-water mixture and outputting the sludge-water mixture to the special ultrafiltration subsystem through a pump; the output end of the special ultrafiltration subsystem is used for outputting concentrated sludge and outputting ultrafiltration produced water to the biochemical subsystem; the secondary filtration subsystem is used for outputting secondary produced water to the biochemical subsystem; the biochemical subsystem is used for treating the ultrafiltration produced water and the secondary produced water and outputting clear water; and the system is also used for treating the copper hydroxide sludge and the concentrated sludge and outputting a copper hydroxide solid. The system provided by the invention realizes resource recovery of circuit board wastewater; meanwhile, the amount of sludge treated by using the system is reduced by 80-90% compared with the amount of the sludge treated by a traditional treatment process; and the treatment cost of the circuit board wastewater is greatly reduced.
Description
technical field [0001] The invention relates to the technical field of circuit board wastewater resource recovery and sludge reduction, in particular to a circuit board wastewater treatment system. Background technique [0002] In the process of circuit board production, a large amount of wastewater containing copper ions will be produced. Except for some wastewater that is treated separately, most of the wastewater will be collected and treated centrally. The concentration of copper ions in this part of wastewater is 200-300 mg / L, which needs to be treated to achieve Discharge requirements, but most of them are treated by dosing precipitation method at present, which not only produces a large amount of copper-containing sludge, but does not realize the effective recovery of resources, and at the same time, the wastewater treatment process is complicated and the operating cost is high. Contents of the invention [0003] Embodiments of the present invention provide a circui...
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IPC IPC(8): C02F9/14C01G3/02
CPCC01G3/02C02F1/001C02F1/444C02F1/66C02F3/00C02F9/00
Inventor 姚宏田盛孙绍斌
Owner BEIJING JIAOTONG UNIV