Method for treating lignite upgrading wastewater by anaerobic co-metabolism

A co-metabolism and wastewater technology, which is applied in anaerobic digestion treatment, mining wastewater treatment, water treatment parameter control, etc., can solve the problems of unstable operation, low microbial biomass, difficulty in starting, etc., and achieves improved biodegradability and improved treatment. Efficiency, the effect of shortening the start-up time

Inactive Publication Date: 2015-03-25
CHANGCHUN ARCHITECTURE & CIVILENGEERING CO LLEGE +1
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of start-up difficulty, unstable operation, low microbial biomass, and the effect of improving the biodegradability of wastewater and reducing the tre

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  • Method for treating lignite upgrading wastewater by anaerobic co-metabolism

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specific Embodiment approach 1

[0009] Specific implementation mode one: this implementation mode is the method for anaerobic co-metabolism treatment of lignite upgrading wastewater, which is specifically completed according to the following steps:

[0010] ① Select lignite upgrading wastewater, which is collected from the lignite upgrading process and then treated by cooling and sedimentation in the intermediate sedimentation tank. The water quality is as follows: COD concentration 2800~3300mg / L, BOD 5 The concentration is 500~600mg / L, the total phenol concentration is 90~110mg / L, the ammonia nitrogen concentration is 70~90mg / L, the total phosphorus concentration is 9~13mg / L, and the cyanide concentration is 0.75~1.25mg / L.

[0011] ②Choose trehalose as the first substrate of co-metabolism, and use it as carbon source to prepare wastewater to start anaerobic reaction. Wastewater preparation method: trehalose is the carbon source, ammonium chloride is the nitrogen source, dipotassium hydrogen phosphate is the...

specific Embodiment approach 2

[0019] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step ③, the dosage of the initial inoculated sludge in the anaerobic reactor is 9g / L, and the others are the same as Embodiment 1.

specific Embodiment approach 3

[0020] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step ②, the ratio of the total amount of COD added by trehalose to the total amount of COD in the lignite upgrading wastewater to be treated every day is controlled to be 0.8 or 1.0 , and the others are the same as those in Embodiments 1 to 3.

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Abstract

The invention discloses a method for treating lignite upgrading wastewater by anaerobic co-metabolism, relating to a method for treating coal chemical wastewater. The method solves the problems that the start is difficult, the operation is instable, the anaerobic microbial biomass is relatively low and does not achieve the expected effect and the like when the lignite upgrading wastewater is treated by adopting an anaerobic process. The method comprises the following main steps: selecting the lignite upgrading wastewater; selecting trehalose as a first co-metabolism matrix, wherein the ratio of the total COD (chemical oxygen demand) quantity of the trehalose added every day to the total COD quantity of the wastewater to be treated is controlled to be 0.75-1.5; starting an anaerobic reactor by adopting an inoculation cultivation method, wherein the adding quantity of the lignite upgrading wastewater is increased by 10% every week; keeping the hydraulic retention time for 12-24h; and controlling the stable working condition. The trehalose is used as the first matrix, so that organic matters which cannot serve as direct anaerobic microbial matrixes can be degraded, or the trehalose can strengthen the growth and propagation of anaerobic microbes using toxic and harmful matters as matrixes. After stable operation, the COD removal rate of the anaerobic treated lignite upgrading wastewater can reach 40-50%, and the removal rate of total phenols can reach 60-70%.

Description

technical field [0001] The invention relates to a method for treating lignite upgrading wastewater, which belongs to the technical fields of municipal engineering, environmental engineering and chemical wastewater treatment. Background technique [0002] Lignite upgrading wastewater refers to the wastewater generated during the lignite upgrading process, which is one of the most difficult industrial wastewaters to treat. According to the detection results of GC-MS, the composition of the wastewater is extremely complex, containing about 37 kinds of organic pollutants, including humic acid, phenols, long-chain alkanes, naphthalene, imidazole, benzofuran, pyrazole, etc., and also ammonia nitrogen and Inorganic pollutants such as cyanide. Most of these components are toxic, harmful and refractory organic substances with high biological toxicity, which seriously threatens the environment and safety. my country is rich in lignite resources. In order to improve the utilization e...

Claims

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Application Information

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IPC IPC(8): C02F3/28
CPCC02F3/28C02F2101/16C02F2101/18C02F2101/30C02F2101/345C02F2103/10C02F2209/08
Inventor 韩相奎王晓玲汤洁褚腊林宋铁红李娜殷宝勇李静文
Owner CHANGCHUN ARCHITECTURE & CIVILENGEERING CO LLEGE
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