Low-energy-consumption low-sludge-yield SBR process

A low energy consumption and sludge technology, applied in water/sludge/sewage treatment, aerobic and anaerobic process treatment, biological water/sewage treatment, etc., can solve high energy consumption, aggravate energy crisis, increase sewage treatment cost, etc. problems, to achieve the effect of reducing water and electricity consumption per ton, facilitating sludge settlement and dehydration, and reducing sludge yield

Inactive Publication Date: 2016-08-31
YANGZHOU JIEYUAN DISCHARGE WATER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High energy consumption and high sludge disposal costs lead to higher sewage treatment costs on the one hand, and exacerbated my country's current energy crisis on the other hand

Method used

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  • Low-energy-consumption low-sludge-yield SBR process
  • Low-energy-consumption low-sludge-yield SBR process
  • Low-energy-consumption low-sludge-yield SBR process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A low energy consumption and low sludge yield SBR process, such as figure 1 As shown, it specifically includes the following steps:

[0022] 1) water ingress

[0023] The sewage first passes through the coarse screen to remove large particles of impurities, and then is lifted by the inlet pump room to flow through the fine screen and aeration desilting tank to further remove suspended solids and fine sand, and then enters the metering channel, where it is distributed and metered ( The COD in the sewage entering the SBR reaction tank is 250mg / L, the BOD is 124mg / L, the SS is 135mg / L, and the NH 3 -N is 28.2mg / L, TN is 35.2mg / L, TP is 4.01mg / L) and the sludge returned from the main aeration area of ​​the SBR reaction tank (the sludge from the main aeration area is returned to the biological selection area The reflux ratio is 22%) into the biological selection zone of the SBR reaction tank at the same time, then flows into the anoxic zone of the SBR reaction tank, and fi...

Embodiment 2

[0034] The sewage treatment steps are the same as in implementation 1, the difference is that the COD in the sewage entering the SBR reaction tank is 200mg / L, the BOD is 117mg / L, the SS is 110mg / L, the NH3-N is 20.5mg / L, and the TN is 25.6mg / L, TP is 2.98mg / L,), correspondingly, in step 2), the control total aeration time is 1.5h.

Embodiment 3

[0038] The sewage treatment steps are the same as in implementation 1, the difference is that the COD in the sewage entering the SBR reaction tank is 120mg / L, the BOD is 65mg / L, the SS is 75mg / L, the NH3-N is 15.2mg / L, and the TN is 19.3mg / L, TP is 2.15mg / L), correspondingly, in step 2), the control total aeration time is 1h.

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Abstract

The invention discloses a low-energy-consumption low-sludge-yield SBR process. The process includes the steps of water inflow, wherein sewage is pretreated and then enters an SBR reaction pond, a non-restrictive water inflow mode is adopted 30-60 min after water inflow, and the concentration of dissolved oxygen in a main aeration zone of the SBR reaction pond is controlled to range from 0 to 0.5 mg/L to enhance the synchronous nitrification and denitrification effect at the stage; 2, aeration, wherein the concentration of the dissolved oxygen in the main aeration zone of the SBR reaction pond ranges from 1.6 mg/L to 2.5 mg/L, the aeration time is defined according to COD of inflowing water, when the COD of the inflowing water is smaller than 120 mg/L, the total aeration time is not longer than 1 hour, when the COD of the inflowing water ranges from 120 mg/L to 250 mg/L, the total aeration time ranges from 1 hour to 2 hours, and when the COD of the inflowing water is larger than 250 mg/L, the total aeration time is not shorter than 2 hours; 3, settling; 4, water drainage. By means of the process, the ton water power consumption is reduced, and the sludge yield is reduced.

Description

technical field [0001] The invention belongs to the technical field of environmental protection sewage treatment, and in particular relates to an SBR process with low energy consumption and low sludge yield. Background technique [0002] The SBR process (circulating activated sludge process) was developed by Professor Goronszy in the United States. The core of the process is a batch reactor. The operation mode in the reactor is mainly water (simultaneous aeration) for 1 hour and aeration for 1 hour. It consists of four stages: 1 hour of sedimentation and 1 hour of water skimming. Four groups of biological pools are operated alternately. The whole mud-water separation process and activated sludge biological reaction process are completed in the same biological pool. The energy consumption of the traditional SBR process (circulating activated sludge method) to treat urban domestic sewage can generally reach 0.2-0.3 degrees per ton of water, and the sludge production rate is 1-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
CPCC02F3/30C02F3/302
Inventor 张颖
Owner YANGZHOU JIEYUAN DISCHARGE WATER CO LTD
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