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A method for increasing the formation rate of anaerobic ammonium oxidation granular sludge

A technology of anaerobic ammonium oxidation and anammox bacteria, applied in anaerobic digestion treatment, chemical instruments and methods, water/sludge/sewage treatment, etc. Irreversible damage to oxidizing bacteria and other issues

Active Publication Date: 2018-02-02
上海生迈缘生物科技有限公司
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Problems solved by technology

In the process of anaerobic sludge forming granules, organic load is an important control condition. When the sludge load reaches 0.3kgCOD / (kgVSS·d) or more, granular sludge begins to form, and the process of oxyammonium oxidation sludge granulation Middle, NH 4 + -N and NO 2 — -N is used as the substrate of the anammox reaction, appropriately increasing the sludge load will speed up the granulation process, if the concentration is too high, it will have an inhibitory effect on the anammox bacteria, and when it exceeds a certain range, it will affect the anammox Oxidizing bacteria cause irreversible damage; if the concentration is too low, the anaerobic ammonium oxidizing bacteria have insufficient nutrients and cannot be quickly enriched to form granular sludge

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  • A method for increasing the formation rate of anaerobic ammonium oxidation granular sludge
  • A method for increasing the formation rate of anaerobic ammonium oxidation granular sludge
  • A method for increasing the formation rate of anaerobic ammonium oxidation granular sludge

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Embodiment Construction

[0023] Concrete implementation steps and effects of the present invention are:

[0024] ①Using the actual first-level treatment of farm fecal wastewater and brewing wastewater (mixed according to a certain ratio as the nutrient source for anaerobic ammonium oxidation granular sludge), control the influent NH 4 + -N and NO 2 — -N mass concentration ratio is 1.2:1, C / N mass concentration ratio is less than 0.5.

[0025] ② Use the mixture of anaerobic sludge and dairy farm manure as inoculation sludge to inoculate the UASB reactor, in which the MLSS of the mixed sludge mixed culture is 3400mg / L, the MLVSS is 2200mg / L, and PAC 2~3mg / L is added and PAM0.5mg / L.

[0026] ③The culture temperature is controlled at 35±3°C, and the pH is controlled at 7.5-8.5.

[0027] ④The process is divided into three stages: the first stage is the substrate promotion stage, the initial concentration of ammonia nitrogen in the influent is about 150mg / L, keeping other conditions unchanged, and then...

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Abstract

The invention relates to a method for increasing the forming speed of anaerobic ammonia oxidation granule sludge. The method comprises the steps that practical industrial wastewater with low C / N is taken as a culturing nutrient source of the anaerobic ammonia oxidation granule sludge, and the mass concentration ratio of NH4<+>-N to NO2<->-N of inflow water is controlled to be (1.05-1.42) to 1; a mixture of anaerobic sludge and livestock breeding faeces is taken as inoculated sludge, by means of the modes of changing the substrate concentration of the inflow water, shortening the hydraulic retention time, controlling the granule size, the granule sludge settling speed and MLVSS / MLSS of the anaerobic ammonia oxidation granule sludge and the like, a nitrogen load of anaerobic ammonia oxidation inflow water is changed, the retention and amplification problems of anaerobic ammonia oxidation bacteria can be effectively solved, and by means of granulation of anaerobic ammonia oxidation sludge, the influence of nitrogen removal efficiency dropping caused by environmental changes can be weakened to some extent.

Description

technical field [0001] The invention relates to ANAMMOX sludge granulation technology, belongs to the field of wastewater biological treatment, and aims to disclose a method for rapidly forming ANAMMOX granular sludge. Background technique [0002] ANAMMOX is a new technology for biological denitrification of wastewater with broad prospects. It has the advantages of saving oxygen consumption, no need to add organic carbon sources, low sludge production, and high matrix removal rate. It has become a research hotspot at home and abroad. However, anammox bacteria are sensitive to the environment. One of the difficulties in application is the retention and expansion of anammox bacteria. Anammox sludge granulation can alleviate the efficiency drop caused by environmental changes to a certain extent. is an effective way to solve this problem. Anaerobic ammonium oxidation granular sludge has good settling performance, high biological activity, strong impact load resistance, low sl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28
CPCC02F3/28C02F2101/16
Inventor 于鹏飞孙明唐欷晨苏杨傅金祥
Owner 上海生迈缘生物科技有限公司
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