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Anaerobic ammonia oxidation/denitrification coupling treatment method for greenhouse turtle breeding wastewater

A technology for anaerobic ammonium oxidation and aquaculture wastewater, applied in the field of anaerobic ammonium oxidation/denitrification coupling treatment of soft-shell turtle aquaculture wastewater in greenhouses, can solve problems such as exceeding the inhibitory concentration of Anammox bacteria activity, achieve low operating costs, simple process, and denitrification high efficiency effect

Inactive Publication Date: 2014-04-16
ZHEJIANG UNIV
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Problems solved by technology

However, there is a certain amount of COD contained in the greenhouse turtle breeding wastewater, which has exceeded the inhibitory concentration for the activity of Anammox bacteria reported in the literature.

Method used

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  • Anaerobic ammonia oxidation/denitrification coupling treatment method for greenhouse turtle breeding wastewater

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Experimental program
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Effect test

Embodiment 1

[0018] Greenhouse soft-shelled turtle breeding wastewater was obtained from a soft-shelled turtle breeding company in Hangzhou, Zhejiang Province. The greenhouse soft-shelled turtle breeding wastewater was reddish-brown. After simple dilution, the specific physical and chemical properties indicators: pH value 7.5-8.1, COD 176-624 mg L -1 , ammonia nitrogen 41.6-139.8 mg L -1 , total nitrogen (TN) 47.5-145.3 mg L -1 , of which nitrate nitrogen and nitrite nitrogen -1 , Ammonia nitrogen is the main form of total nitrogen in wastewater.

[0019] use as figure 1 In the upflow anaerobic sludge bed reactor shown, the effective volume of the reactor is 10L, and multi-faceted hollow spherical fillers are added in the reactor cavity, and the amount added accounts for 5% of the total effective volume of the reactor. Sodium nitrite was added to the wastewater from greenhouse soft-shelled turtle culture after preliminary precipitation to control the ratio of nitrite nitrogen to ammonia ...

Embodiment 2

[0021] Greenhouse soft-shelled turtle breeding wastewater is taken from a soft-shelled turtle breeding company in Hangzhou, Zhejiang Province. Greenhouse soft-shelled turtle breeding wastewater is reddish-brown. After simple dilution, the specific physical and chemical properties indicators: pH value 7.5-8.1, COD172-620mg L -1 , ammonia nitrogen 42.9-139.8mg L -1 , total nitrogen (TN) 46.8-140.4 L -1 , of which nitrate nitrogen and nitrite nitrogen -1 , Ammonia nitrogen is the main form of total nitrogen in wastewater.

[0022] use as figure 1 In the upflow anaerobic sludge bed reactor shown, the effective volume of the reactor is 10L, and bamboo charcoal filler is added in the reactor cavity, and the added amount accounts for 4% of the total effective volume of the reactor. Sodium nitrite was added to the greenhouse soft-shelled turtle culture wastewater after preliminary precipitation to control the ratio of nitrite nitrogen and ammonia nitrogen concentration in the wastew...

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Abstract

The invention discloses an anaerobic ammonia oxidation / denitrification coupling treatment method for greenhouse turtle breeding wastewater. The method comprises the following steps: naturally settling the greenhouse turtle breeding wastewater, adding sodium nitrite, controlling a concentration ratio of nitrite nitrogen and ammonia nitrogen in the wastewater to be 0.8-1.3, continuously and uniformly pumping the wastewater into an up-flow type anaerobic sludge bed reactor from the bottom, performing anaerobic ammonia oxidation / denitrification coupling treatment, maintaining the hydraulic retention time to be 12 hours, wherein the reaction temperature is 30+ / -2 DEG C, and discharging the wastewater from the upper part of the reactor through gas-liquid-solid three-phase separation. The method is simple in process and low in operating cost; according to the synergistic effect of ammonia oxidation and denitrification, carbon and nitrogen can be synchronously and efficiently removed, the denitrification efficiency is high, the removal rate of ammonia nitrogen and total nitrogen in the greenhouse turtle breeding wastewater is more than 80 percent, and the removal rate of chemical oxygen demand is more than 50 percent. The method is suitable for advanced treatment of typical greenhouse turtle breeding wastewater in China.

Description

technical field [0001] The invention relates to a combined anaerobic ammonium oxidation / denitrification treatment method for soft-shelled turtle breeding wastewater in a greenhouse, belonging to the technical field of environmental protection. Background technique [0002] Turtle is rich in nutrition, containing protein, fat, calcium, iron, animal glue, keratin and multivitamins. It is a rare tonic and a treasure of aquatic products. my country is the country with the largest scale of soft-shelled turtle breeding in the world. With the improvement of people's living standards in our country, domestic consumption of soft-shelled turtles is increasing day by day. After my country's entry into WTO, high-quality soft-shelled turtles and other aquatic products are gradually going abroad and exported to Southeast Asia, Japan and other regions. It has greatly promoted the development of soft-shelled turtle farming, with an average annual growth rate of 26%. [0003] Since the 1980s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28
Inventor 吴伟祥朱为静陈重军
Owner ZHEJIANG UNIV
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