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Nitrogen-containing wastewater treatment method

A treatment method and wastewater technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as long hydraulic retention time, achieve short treatment time and high denitrification efficiency Effect

Pending Publication Date: 2021-05-28
JINAN UNIVERSITY
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Problems solved by technology

However, the hydraulic retention time of the microbial denitrification process is long, and it is only suitable for wastewater containing low concentrations of nitrate

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1 Rhineheimer's HNAD-02 and nano Fe 3 o 4 Combined use to treat nitrate wastewater

[0026] With the ratio of 1% by mass percentage, inoculate 50mL nitrate concentration of 200mg / L, 1000mg / L containing nano Fe 3 o 4 in nitrate wastewater. Among them, nano Fe 3 o 4 The concentration in wastewater is 100mg / L, nano-Fe 3 o 4 The particle size is 25nm, C / N is 8, pH is 7.0-8.0, DO is 2mg / L, and the temperature is 30°C for 60h. Three parallel experiments are designed for each group. Fe 3 o 4 The wastewater was used as a control experiment, and the NO in the supernatant was measured every 12 hours 3 - - N concentration and TN concentration.

[0027] Result analysis: Rheinheimeria HNAD-02 and nano-Fe 3 o 4 The results of combined treatment of nitrate wastewater are shown in Table 1. From the results in Table 1, it can be known that Rhineheimerella HNAD-02 and nano-Fe 3 o 4 It is the waste water of 200mg / L and 1000mg / L that joint use is handled nitrate...

Embodiment 2

[0030] Embodiment 2 Rhineheimer's HNAD-02 and nanometer Fe 3 o 4 Combined use to treat nitrate wastewater

[0031] Only change nano Fe on the basis of embodiment 2 3 o 4 The concentration in the wastewater is 25mg / L, and the study of Rhineheimer's HNAD-02 and nano-Fe 3 o 4 The performance of joint treatment of nitrate wastewater is shown in Table 3.

[0032] Result analysis: Rheinheimeria HNAD-02 and nano-Fe 3 o 4 The results of combined treatment of nitrate wastewater are shown in Table 2. From the results in Table 2, it can be known that Rhineheimerella HNAD-02 and nano-Fe 2 o 3 Combined use treatment concentration is 200mg / L and 1000mg / L nitrate wastewater, compared with the result (table 3) of single bacterial strain treatment wastewater, NO 3 - The removal rate of -N increased by 30.3% and 34.5% respectively; the removal rate of TN increased by 32.7% and 32.4% compared with the single strain, and the removal rate of COD increased by 30.3% and 33.4%. This shows...

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Abstract

The invention relates to the technical field of wastewater treatment, and provides a nitrogen-containing wastewater treatment method. Nitrogen-containing wastewater is treated through the combination of aerobic denitrification Rheinheimera sp. and nano Fe3O4, the method is not only suitable for aerobic denitrification treatment of high-concentration wastewater, but also obviously improves the nitrate treatment efficiency. Compared with the treatment of wastewater with single Rheinheimera sp., the treatment method disclosed by the invention is more suitable for treating high-concentration nitrogen-containing wastewater, the treatment time is short, the denitrification efficiency is high, most nitrate in the nitrogen-containing wastewater is converted into gaseous nitrogen to be separated from the wastewater after the denitrification of Rheinheimera sp., the total nitrogen content in the wastewater is obviously reduced, and secondary pollutants such as ammonia nitrogen and nitrite nitrogen accumulated in water are not caused. The treatment method has a good application prospect in large-scale industrial wastewater treatment.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for treating nitrogen-containing wastewater. Background technique [0002] In recent years, due to the massive discharge of industrial wastewater and domestic sewage, the nitrogen content in water bodies has been increasing, threatening the stability of the global aquatic ecosystem and the safety of drinking water. Biological denitrification technology is a common denitrification technology for wastewater treatment because of its simple operation, high efficiency and low cost. The traditional denitrification process of wastewater is that under aerobic conditions, autotrophic bacteria first oxidize nitrogenous compounds in sewage into nitrate and nitrite; then denitrifying bacteria denitrify nitrate and nitrite Reductive conversion to gaseous products to denitrify wastewater. Nitrification is the premise of denitrification, but the denitrification process c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/30
CPCC02F3/34C02F3/301C02F3/305
Inventor 曹刚王少娴刘翔赫廖雨欣潘涌璋冯乃宪秦华明何宝燕莫测辉
Owner JINAN UNIVERSITY
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