Advanced wastewater treatment method and system capable of realizing sludge source reduction

It is an advanced treatment and reduction technology, which is applied in water/sludge/sewage treatment, water/sewage treatment, flotation water/sewage treatment, etc. It can solve the problems of low efficiency, electro-Fenton and electrochemical treatment. Thoroughness, large sludge output and other problems, to achieve the effect of convenient operation, wide application range, and reduced sludge output

Inactive Publication Date: 2020-07-17
CHINA UNITED NORTHWEST INST FOR ENG DESIGN & RES
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method and system for advanced wastewater treatment that realizes the reduction of sludge at the source to solve the problem of incomplete and inefficient treatment by electro-Fenton and electrochemical methods. The problem of high and large sludge production

Method used

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  • Advanced wastewater treatment method and system capable of realizing sludge source reduction
  • Advanced wastewater treatment method and system capable of realizing sludge source reduction

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Embodiment 1

[0057] The main pollutants of the wastewater are COD, suspended solids and total phosphorus. In this embodiment, the electro-Fenton combined electrocoagulation process is adopted. The wastewater enters the electro-Fenton reaction unit, first enters the first acid-base adjustment pool, and adds sulfuric acid solution to adjust the pH value. To 3, enter the electric Fenton reactor for Fenton deep oxidation, the aeration device aerates the cathode, the anode uses an iron plate, the cathode uses an activated carbon fiber plate, the reaction time of the electric Fenton reaction unit is 50min, and the voltage is controlled at 4V. The current control is 100mA, and the aeration rate is 1.5m 3 / h, after the electro-Fenton reaction is completed, the effluent enters the second acid-base adjustment tank, and the sodium hydroxide solution is added to adjust the pH value to 7, and then enters the electroflocculation reaction unit. The anode is made of aluminum plate, and the cathode is made ...

Embodiment 2

[0071] The main pollutants of the wastewater are COD, suspended solids and total phosphorus, and the COD content is relatively high. This embodiment adopts the electro-Fenton combined electro-oxidation + electro-flocculation process, and the wastewater enters the electro-Fenton reaction unit, and first enters the first acid-base adjustment pool , add sulfuric acid solution, adjust the pH value to 3, and then enter the electric Fenton reactor for Fenton deep oxidation, the aeration device aerates the cathode, the anode uses an iron plate, the cathode uses an activated carbon fiber plate, and the reaction time of the electric Fenton reaction unit 50min, the voltage is controlled at 4V, the current is controlled at 120mA, and the aeration volume is controlled at 1.8m 3 / h, after the electro-Fenton reaction is completed, the effluent enters the second acid-base adjustment tank, and the sodium hydroxide solution is added to adjust the pH value to 7, and then enters the electro-oxida...

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Abstract

The invention discloses an advanced wastewater treatment method and system capable of realizing sludge source reduction. According to the method, wastewater firstly enters a first acid-base regulatingtank, and a sulfuric acid solution is added to regulate a pH value to 3-5; then the wastewater enters an electro-Fenton reactor for Fenton advanced oxidation, and an aeration device aerates a cathode; and after an electro-Fenton reaction is finished, effluent is allowed to enter a second acid-base regulating tank, and a sodium hydroxide solution is added to regulate the pH value to 7-9; and thenthe effluent is enabled to enter an electrochemical reaction unit for treatment, so advanced treatment of the wastewater is finished. The method is wide in application range and can be suitable for advanced treatment of different types of sewage.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a method and a system for advanced treatment of waste water for reducing the amount of sludge at the source. Background technique [0002] With the improvement of water treatment standards, it is usually necessary to add an advanced treatment process after the traditional biochemical method. As an efficient and stable wastewater advanced treatment method, the Fenton method gradually occupies a major position in engineering treatment, and its effluent can stably meet the standard. However, there are many problems in the traditional Fenton method: (1) The sludge output is large, and a large amount of iron sludge produced needs to be further treated; (2) The operating cost is high, not only the cost of chemicals is high, but the sludge treatment cost also brings a lot to the enterprise. Not a small economic burden; (3) difficult operation and management, H 2 o ...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/463C02F1/465C02F1/467C02F1/72C02F101/30
CPCC02F1/46109C02F1/463C02F1/465C02F1/4672C02F1/722C02F2101/30C02F2303/04
Inventor 田伟曾卉田进张迪商虎峰柴悦
Owner CHINA UNITED NORTHWEST INST FOR ENG DESIGN & RES
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