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Method for treating sewage through adoption of QTCNP technology

A sewage and process technology, applied in the field of high-efficiency biological removal of sewage treatment, can solve problems such as reduction, and achieve the effects of simple process control, shortened process, and long sludge age

Inactive Publication Date: 2017-12-05
应清界 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0038] Aiming at the problems existing in the existing sewage treatment process, the present invention discloses a sewage treatment method for the whole process of highly efficient decarburization and phosphorus removal under aerobic conditions, and this process is referred to as the QTCNP process
[0039] The purpose of the present invention is to provide a process for synchronously removing COD and NH in sewage through the action of microorganisms through a completely aerobic process. 3 -N, TN, and TP methods solve the need for three different reaction units of anaerobic-anoxic-aerobic in the existing sewage treatment biological nitrogen and phosphorus removal process; unify the nitrogen and phosphorus removal process to achieve Synchronous and efficient removal of carbon, nitrogen and phosphorus in the whole process in an aerobic environment does not require anoxic and anaerobic units, reduces process units, solves the contradictory problems in the existing process of nitrogen and phosphorus removal, unifies the sludge age, and makes nitrogen and phosphorus removal The sludge age has become a long sludge age, and can reduce the amount of sludge by more than 30%, greatly improving the efficiency of nitrogen and phosphorus removal, easy to operate, and save operating costs

Method used

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  • Method for treating sewage through adoption of QTCNP technology
  • Method for treating sewage through adoption of QTCNP technology
  • Method for treating sewage through adoption of QTCNP technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0136] The treated raw water is drawn from the actual sewage collection tank. The influent part of the sewage treatment plant is domestic sewage, and the other part is industrial sewage, which does not need to add other nutrients.

[0137] Influent water quality:

[0138] COD Cr = 525 mg / l;

[0139] NH 3 -N=56mg / l;

[0140] TN=62mg / l;

[0141] TP = 6.17mg / l;

[0142] pH 6.5

[0143] Actual control index: MLSS=6.67g / l, pH value of aerobic bioreactor 7.2, influent flow rate 0.4t / h, hydraulic retention time HRT=15 hours, biochemical tank DO: 2~4mg / l, mixed liquid reflux R 1 = 2.0, the sedimentation time of the sedimentation tank is controlled at 1.5 hours, and the sludge reflux ratio R 2 = 1.0, the mud age is controlled at 30 days.

[0144] Actual effluent water quality:

[0145] COD Cr = 18 mg / l;

[0146] NH 3 - N = 0.8 mg / l;

[0147] TN=8.2mg / l;

[0148] TP = 0.16mg / l;

[0149] The effluent reaches the first-class A standard of the new Beijing standard.

Embodiment 2

[0151] The treated raw water is drawn from the actual sewage collection tank. The influent part of the sewage treatment plant is domestic sewage, and the other part is industrial sewage, which does not need to add other nutrients.

[0152] Influent water quality:

[0153] COD Cr =712 mg / l;

[0154] NH 3 -N=74mg / l;

[0155] TN=86mg / l;

[0156] TP = 7.45mg / l;

[0157] pH 6.5

[0158] Actual control index: MLSS=5.56g / l, pH value of aerobic bioreactor 7.3, influent flow rate 0.5t / h, hydraulic retention time HRT=12 hours, biochemical tank DO: 2~4mg / l, mixed liquid reflux R1 = 2.0, the sedimentation time of the sedimentation tank is controlled at 1.5 hours, and the sludge reflux ratio R 2 = 1.0, the mud age is controlled at 35 days.

[0159] Actual effluent water quality:

[0160] COD Cr = 15mg / l;

[0161] NH 3 - N = 0.7 mg / l;

[0162] TN=7.6mg / l;

[0163] TP = 0.17mg / l;

[0164] The effluent reaches the first-class A standard of the new Beijing standard.

Embodiment 3

[0166] The treated raw water is drawn from the actual sewage collection tank. The influent part of the sewage treatment plant is domestic sewage, and the other part is industrial sewage, which does not need to add other nutrients.

[0167] Influent water quality:

[0168] COD Cr = 328 mg / l;

[0169] NH 3 -N=48mg / l;

[0170] TN=54mg / l;

[0171] TP = 4.54mg / l;

[0172] pH 6.9

[0173] Actual control index: MLSS=5.55g / l, pH value of aerobic bioreactor 7.5, influent flow rate 0.5t / h, hydraulic retention time HRT=12 hours, biochemical tank DO: 2~4mg / l, mixed liquid reflux R 1 = 3.0, the sedimentation time of the sedimentation tank is controlled at 1.5 hours, and the sludge reflux ratio R 2 =2.0, the mud age is controlled at 25 days.

[0174] Actual effluent water quality:

[0175] COD Cr = 8mg / l;

[0176] NH 3 - N = 0.5 mg / l;

[0177] TN=5.3mg / l;

[0178] TP = 0.09mg / l;

[0179] The effluent reaches the first-class A standard of the new Beijing standard.

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Abstract

The invention discloses a method for treating sewage through adoption of QTCNP technology. According to the method, aerobic denitrification composite flora and aerobic dephosphorization composite flora are added to synchronously remove COD, NH3-N, TN, and TP in an aerobic environment, and the sludge reflux ratio, the mixed liquid reflux ratio, and indexes, such as the PH value, DO value, sludge concentration, and sludge age, of an aerobic bioreactor are controlled to achieve efficient biological carbon, nitrogen and phosphorus removal. The COD removal rate can reach no less than 95%, NH3-N removal rate can reach no less than 95%, TN removal rate can reach no less than 85%, and TP removal rate can reach no less than 90%. The method is non-anoxic or anaerobic, is saved in investment, simple and stable to operate, low in treatment cost, and less in sludge production amount. The method is suitable for treating various sewage containing COD, NH3-N, TN, and TP, and can be applied to standard treatment of various sewage.

Description

technical field [0001] The invention relates to a sewage treatment method in the technical field of resources and environment, in particular to a method for treating COD and NH in sewage in an aerobic bioreactor through a complex microbial flora. 3 - N, TN, TP for efficient biological removal of sewage treatment methods. Background technique [0002] With the rapid growth of my country's economy and the substantial increase in resource and energy consumption, the intensity of pollutant discharge is increasing and the load is high. The discharge of major pollutants exceeds the environmental capacity of receiving water bodies, causing serious damage to receiving water bodies such as lakes, rivers, and reservoirs. The problem of eutrophication is an environmental problem characterized by nitrogen and phosphorus pollution. It is manifested in severe eutrophication of water bodies, resulting in excessive proliferation of algae, reduction of dissolved oxygen in water bodies, death ...

Claims

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Application Information

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IPC IPC(8): C02F3/02C02F3/34C02F9/14
CPCC02F1/001C02F1/32C02F1/44C02F1/78C02F3/02C02F3/348C02F9/00C02F2203/006C02F2303/04Y02W10/10
Inventor 应清界应若晨汪苹王智宏
Owner 应清界
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