Method for synchronously degrading carbon, nitrogen and phosphorus in wastewater without discharging sludge

A technology for degrading sewage and sewage, applied in water/sludge/sewage treatment, adjustment methods for biological treatment, chemical instruments and methods, etc. It can improve the adaptability and treatment efficiency, avoid the risk of secondary pollution, and overcome the difficulty of implementation.

Inactive Publication Date: 2014-01-29
JIANGXI JDL ENVIRONMENTAL PROTECTION CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The traditional sewage treatment process has the following problems: (1) It is difficult to implement (non-standard design, low efficiency and large land occupation); (2) The water output effect is unstable (complex management, greatly affected by seasons); (3) It affects the surrounding environment ( Discharge of organic excess sludge and produce peculiar smell), not suitable for the treatment of mixed wastewater

Method used

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  • Method for synchronously degrading carbon, nitrogen and phosphorus in wastewater without discharging sludge

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Embodiment 1

[0012] A facultative or anoxic state is formed in the reactor of the present invention, and the bacteria group in the reactor converts the organic matter in the sewage into carbon dioxide and water and other substances through self-metabolism, and at the same time, the decaying bacteria are decomposed as a nutrient source for other bacteria, and the reaction The organic sludge in the device reaches a dynamic balance, and realizes near-zero discharge of organic excess sludge. The reaction process is shown in the attached drawing of the manual:

[0013] A facultative or anoxic state is formed in the reactor of the present invention. The flora in the reactor converts the phosphorus in the sewage into substances in the microorganisms through self-metabolism, and then converts it into phosphine and biphosphine through a biological cycle. The reaction process is as follows:

[0014] C source + phosphate + facultative complex flora → microbial cells (organophosphate)

[0015] Microbi...

Embodiment 2

[0021] Taking the treatment of a rural sewage (domestic sewage + livestock and poultry wastewater mixed discharge) as an example, the influent BOD 5 The COD is 410mg / L, the COD is 609mg / L, the ammonia nitrogen is 20.96mg / L, and the total phosphorus is 4.10mg / L. After the sewage is pretreated, it directly enters the facultative membrane bioreactor. The process runs continuously and does not discharge sludge . Sewage is treated in a facultative membrane bioreactor (FMBR). During the process, the organic load of the reactor is increased (supplementary carbon source) by not discharging organic sludge, and the parameters of the membrane bioreactor are controlled to form a facultative state. In the facultative membrane bioreactor The reactor (FMBR) synchronously treats sewage sludge and removes nitrogen and phosphorus. Organic pollutants are finally discharged into the air in the form of carbon dioxide, nitrogen, phosphine and biphosphine gas, and BOD in the effluent 5 The COD is 1...

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Abstract

The invention provides a method for synchronously degrading carbon, nitrogen and phosphorus in wastewater without discharging sludge. The method is characterized in that the organic sludge is not discharged so as to increase the organic loading (supplementary carbon source) of a reactor, meanwhile, the parameters of a membrane bioreactor are controlled so as to form the facultative (or oxygen deficiency) state, the synchronous treatment of wastewater and sludge and the nitrogen and phosphorus removal are realized in the facultative membrane bioreactor (FMBR), and the treatment link is simplified; the organic sludge is used as the internal supplementary carbon source of the FMBR, so that resources are saved, and the carbon emission is reduced; the organic sludge is not discharged, so that the secondary pollution risk is avoided.

Description

technical field [0001] The invention relates to a sewage treatment technology, in particular to a method for synchronously degrading carbon, nitrogen and phosphorus in sewage without discharging mud. Background technique [0002] In recent years, the construction of urban sewage treatment plants in my country has been basically completed, and the construction of township sewage treatment has begun. The domestic sewage is mixed with livestock and poultry breeding wastewater (mixed wastewater), and the concentration of pollutants is high and the points are wide. The treatment and management are difficult. The treatment of mixed wastewater is the main environmental problem China is facing, and its urgency and importance are self-evident. [0003] The traditional sewage treatment process has the following problems: (1) It is difficult to implement (non-standard design, low efficiency and large land occupation); (2) The water output effect is unstable (complex management, greatly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F3/30C02F3/34
CPCC02F3/006C02F3/308C02F3/307C02F3/2853
Inventor 廖志民陶琨熊建中周荣忠曾凯刘华琼邹灿李文玄王芳芳肖俊胡姣姣许莹莹谢锦文杨凡李昆刘金凤邓意林王梓许振荣王延龙
Owner JIANGXI JDL ENVIRONMENTAL PROTECTION CO LTD
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