A heavy metal sewage treatment system

A sewage treatment system and heavy metal technology, applied in water/sewage treatment, multi-stage water/sewage treatment, neutralized water/sewage treatment, etc., can solve problems such as endangering environmental health, increasing biological toxicity, and biochemical system collapse, achieving High matching degree, stable chemical properties, simple and clear process

Active Publication Date: 2021-05-07
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of the fact that the residual heavy metals discharged from the factory into the municipal sewage plant exist in suspended, free and complex states at the same time, different methods or water treatment chemicals are required to remove heavy metals in different forms, which increases the difficulty of operation; on the other hand, the existing water treatment chemicals In order to achieve the discharge of heavy metals in industrial wastewater, it is often necessary to overdosing, but excessive dosing in municipal sewage will lead to the collapse of the biochemical system on the one hand, and on the other hand, the residual chemicals in the factory water will increase biological toxicity and endanger environmental health; at the same time, urban sewage plants in my country It has covered the whole country, and the sewage plant is limited by space and operating cost control. It does not have the ability to build additional structures to treat heavy metals and cannot use high-cost treatment methods such as electrochemistry and reverse osmosis membranes.

Method used

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  • A heavy metal sewage treatment system
  • A heavy metal sewage treatment system
  • A heavy metal sewage treatment system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] The main process of the treatment facilities of a sewage treatment plant adopts the AAO activated sludge method. The suspended solids in the wastewater entering the plant contain heavy metals such as copper ions, nickel ions and manganese ions. The treatment process does not design a heavy metal removal unit, resulting in heavy metals in the effluent exceeding the discharge standard . This embodiment adopts figure 1 The system shown, treats the above-mentioned sewage, as follows:

[0070] (1) Sewage enters the regulating tank of the primary treatment unit, detects the pH through the pH value detection sensor in the rapid monitoring module of the influent water quality of the auxiliary system for regulation, and feeds back to the pH control module of the auxiliary system for regulation, and controls the primary reaction unit The acid / alkali dosing pump in the adjustment tank is automatically turned on and off to adjust the pH value of the sewage to pH6.8, and the adjust...

Embodiment 2

[0079] The main process of the treatment facilities of a sewage treatment plant adopts the AAO activated sludge method. The suspended solids in the wastewater entering the plant contain heavy metals such as lead ions, nickel ions, and zinc ions. The treatment process does not design a heavy metal removal unit, resulting in heavy metals in the effluent exceeding the discharge standard . This embodiment adopts figure 1 The system shown, treats the above-mentioned sewage, as follows:

[0080] (1) Sewage enters the adjustment pool of the primary treatment unit, and the pH is detected by the pH value detection sensor in the rapid monitoring module of the influent water quality of the auxiliary system for regulation, and is fed back to the pH control module of the auxiliary system for regulation, and the primary treatment unit is controlled The acid / alkali dosing pump in the adjustment tank is automatically opened and closed to adjust the pH value of the sewage to pH7.2, and the ad...

Embodiment 3

[0089] The main process of the treatment facility of a sewage treatment plant adopts the AAO activated sludge method. The suspended solids in the wastewater entering the plant contain heavy metals such as mercury ions, chromium ions, and manganese ions. The treatment process does not design a heavy metal removal unit, resulting in heavy metals in the effluent exceeding the discharge standard . This embodiment adopts figure 1 The system shown, treats the above-mentioned sewage, as follows:

[0090] (1) Sewage enters the regulating tank of the primary treatment unit, detects the pH through the pH value detection sensor in the rapid monitoring module of the influent water quality of the auxiliary system for regulation, and feeds back to the pH control module of the auxiliary system for regulation, and controls the primary reaction unit The acid / alkali dosing pump in the adjustment tank is automatically turned on and off to adjust the pH value of the sewage to pH6.8, and the adju...

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PUM

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Abstract

The invention belongs to the technical field of sewage treatment, and in particular relates to a heavy metal sewage treatment system. The heavy metal sewage treatment system includes a regulation and control auxiliary system, a primary treatment unit, a secondary treatment unit, and an outlet water safety guarantee unit; the primary treatment unit, the secondary treatment unit, and the outlet water safety guarantee unit are connected in sequence. At the same time, a method for treating heavy metal sewage by using the above system is also provided. Using this system and process can give full play to the characteristics and advantages of the agent, and solve the problem that different heavy metals require different precipitation pH, and the process is simple and clear, does not require new structures, does not affect the removal of other pollutants, and matches the established sewage treatment process High precision, the dosing control in the process and method of the present invention adopts PLC mode to carry out automatic control, effectively reducing the comprehensive operation cost.

Description

Technical field: [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a heavy metal sewage treatment system. Background technique: [0002] With the rapid development of industries such as electroplating, chemical industry, metal pickling, metallurgy and electronics, industrial wastewater with high concentrations of heavy metals will be produced during production. After the enterprise adopts necessary pollution control facilities, the content of different heavy metals in wastewater can be significantly reduced to the discharge standard of 0.05-5.0 mg / L, but the concentration of heavy metals is still higher than the acceptance limit of municipal sewage treatment plants. Heavy metals are already a part of municipal sewage. important and common pollutants. At the same time, the lack of advanced industrial wastewater treatment technology, illegal discharge and sudden heavy metal pollution accidents directly lead to the heavy meta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/20C02F101/10C02F101/16C02F101/30C02F101/22
CPCC02F1/5236C02F1/5281C02F1/56C02F1/66C02F9/00C02F2001/007C02F2101/105C02F2101/16C02F2101/20C02F2101/203C02F2101/206C02F2101/22C02F2101/30C02F2209/06C02F2209/08
Inventor 兰华春张顺彭剑峰刘会娟曲久辉
Owner TSINGHUA UNIV
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