Application of potamogeton crispus fermentation liquor to improving capability of denitrification for sewage treatment

A sewage treatment and fermented liquid technology, applied in the field of environmental engineering, can solve the problems that the effluent water quality is easily affected by the external temperature, the release of carbon sources cannot be effectively controlled, and the hydraulic retention time is long. It achieves low cost, simple method, Effect of reducing environmental harm

Active Publication Date: 2014-10-29
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its disadvantages are that the release of carbon sources cannot be effectively controlled, the required hydraulic retention time is long, and the effluent quality is easily affected by the external temperature.

Method used

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  • Application of potamogeton crispus fermentation liquor to improving capability of denitrification for sewage treatment
  • Application of potamogeton crispus fermentation liquor to improving capability of denitrification for sewage treatment
  • Application of potamogeton crispus fermentation liquor to improving capability of denitrification for sewage treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Example 1: Preparation of fermented sludge.

[0053] The fermented sludge used in the experiment was taken from the residual sludge after dehydration in the sewage treatment plant.

[0054] Prepare acclimatization medium with the following components: glucose 15g / L, NaNO 3 3.04g / L, KH 2 PO 4 0.44g / L, MgSO 4 ·7H 2 O0.96g / L, CaCl 2 0.72g / L, NaHCO 3 0.96g / L, MnCl 2 0.11g / L. Then put 2.5kg of dehydrated residual sludge from the sewage treatment plant into a 5L fermenter, add 4L of acclimatization medium, adjust the pH to 7.4, acclimate at 28°C for one week, and monitor and control the pH every day.

[0055] The activated sludge in the following examples were all prepared according to the above method.

Embodiment 2

[0056] Embodiment 2: the preparation of fermented liquid of Smilax chinensis.

[0057] The weeds used in the experiment were collected from Tianlai River, Xianlin Campus, Nanjing University. After collection, weed, wash, drain, weigh 1.3kg, crush it with a plant vermicelli machine, put it in a 5L fermenter, add 350ml of domesticated fermentation sludge at the same time, and remove dissolved oxygen after nitrogen aeration for 10 minutes The final ultrapure water 3000ml, adjust the pH to 7-8. The fermenter was placed in a water-proof constant temperature incubator for 7 days of anaerobic fermentation at 37°C. The fermented liquid was filtered to remove the residues of Smilax, and the filtrate was collected and stored at 4°C for later use.

[0058] The Smilax fermented liquid in the following examples was all prepared according to the above-mentioned method.

Embodiment 3

[0059] Embodiment 3: The effect of adding the fermented liquid of Smilax chinensis on the quality of influent water.

[0060] The various water quality indexes of the fermented liquid of Smilax are shown in Table 2, and the quality of influent water prepared with the fermented liquid of Smilax as carbon source is shown in Table 3. Fermentation Broth COD Cr , TN, and TP contents were 15400, 208.6, and 143.7 mg / L respectively. Nitrogen in the fermentation broth mainly existed in the form of ammonia nitrogen, and phosphorus mainly existed in the form of soluble orthophosphate (DIP). Therefore, while increasing the content of organic matter in the influent water by adding the fermented liquid of Smilax chinensis, nitrogen and phosphorus will also be brought in. Compared with the group without fermentation broth, when COD / N=8, 16, and 24, the TN content in the influent increased by 1.3, 2.8, and 4.1 mg / L, and the TP content increased by 0.97, 2.22, and 2.82 mg / L, respectively. Ni...

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Abstract

The invention discloses an application of potamogeton crispus fermentation liquor to improving the capability of denitrification for sewage treatment. The potamogeton crispus fermentation liquor is prepared by draining off and grinding potamogeton crispus after collecting potamogeton crispus, then putting ground potamogeton crispus in a fermentation tank to be mixed with naturalized activated sludge, then adding water, carrying out constant temperature fermentation, and removing potamogeton crispus residues through filtration. The invention also discloses an application of potamogeton crispus fermentation liquor to improving the capability of denitrification for sewage treatment. The method has the advantages of simplicity in operation, cheap and easily obtained raw materials, good denitrification effects and the like, and has important social, economic and ecological benefits.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and in particular relates to the application of a fermented weed fermented liquid in improving the denitrification and denitrification capacity of sewage treatment. Background technique [0002] In recent years, the annual comprehensive assessment results of river water quality in the Taihu Lake Basin show that the water quality of 85.2% of the monitored sections cannot meet the requirements of Class III, and most of them are Class V or worse than Class V. Among them, the main pollutants exceeding the standard are ammonia nitrogen, permanganate index, dissolved oxygen, five-day biochemical oxygen demand, petroleum, total phosphorus and chemical oxygen demand. The continuous deterioration of water quality in upstream rivers and lake areas has directly led to an increase in the total amount of pollutants entering Taihu Lake. Affected by the increase of pollutants entering the lak...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28
Inventor 杨柳燕陈乾坤焦一滢张权李丽陈旭
Owner NANJING UNIV
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