System and process for treating oxytetracycline waste water by anaerobic bio-treatment method

Abstract

The invention relates to a system and process for treating oxytetracycline waste water by an anaerobic bio-treatment method, which has the advantages of stable process, low investment, small occupied area and low energy consumption. The system comprises a hydrolysis and acidification tank, wherein waste water is hydrolyzed and acidified in the hydrolysis and acidification tank and the waste water is then moved into a lime precipitation tank; in the lime precipitation tank, oxytetracycline in the waste water is combined with calcium ions to generate precipitates; then, the waste water is moved into an anaerobic reactor; the anaerobic reactor removes most of COD (Chemical Oxygen Demand) in the outlet water and simultaneously emits generated marsh gas; and after going out of the anaerobic reactor, the waste water is moved into an aerobic tank, so that organic substances and ammonia nitrogen in the waste water can be further treated, thereby ensuring that the discharge of the waste water is reached the standards.

Description

technical field

[0001] The invention relates to a system and a process for treating oxytetracycline wastewater by anaerobic biological method. Background technique

[0002] Terramycin (Oxytetracycline) molecular formula is as follows, chemical name: 6-methyl-4-(dimethylamino)-3,5,6,10,12,12a-hexahydroxy-1,11dioxo- 1,4,4a,5,5a,6,11,12a-Octahydro-2-tetracenecarboxamide.

[0003]

[0004] Oxytetracycline is a product of microbial fermentation. At present, the production process of Oxytetracycline in China mainly includes two steps: fermentation and extraction. Fermentation mainly uses nearly 10 kinds of organic matter such as starch, bean cake powder, and dextrin as raw materials, as the carbon source and energy for microbial synthesis, but the carbon entering the product only accounts for 9.8% of the input, while 90.2% of the carbon comes from waste gas, Discharged into the environment in the form of waste water and waste residues. The extraction process is to use oxalic...

Examples

Embodiment 1

[0034] 1. After the pH value of the wastewater is adjusted, the pH value of the influent water is adjusted to 6.5, and enters the hydrolytic acidification tank. The hydrolytic acidification reaction is controlled by controlling the hydraulic retention time. The reaction of organic matter in this stage is only the hydrolytic acidification stage. The residence time of the pool is 8-9 hours. Within this time range, the first two stages of anaerobic fermentation, namely hydrolysis and acidification, can be used to degrade most of the high-molecular toxic substances such as oxytetracycline in the wastewater into low-molecular organic substances. , to facilitate subsequent biological treatment.

[0035] The hydrolytic acidification process does not require strict anaerobic conditions, so the operating conditions are easier to control, and the residence time is short, which can adapt to higher COD and BOD loads. This process improves the biodegradability of wastewater and reduces the...

Embodiment 2

[0041] 1. After the pH value of the wastewater is adjusted, the pH value of the influent water is adjusted to 7, and then enters the hydrolytic acidification tank. The hydrolytic acidification reaction is to control the hydraulic retention time to control the reaction of organic matter at this stage. The residence time of the pool is 8-9 hours. Within this time range, the first two stages of anaerobic fermentation, namely hydrolysis and acidification, can be used to degrade most of the high-molecular toxic substances such as oxytetracycline in the wastewater into low-molecular organic substances. , to facilitate subsequent biological treatment.

[0042] The hydrolytic acidification process does not require strict anaerobic conditions, so the operating conditions are easier to control, and the residence time is short, which can adapt to higher COD and BOD loads. This process improves the biodegradability of wastewater and reduces the toxicity of wastewater due to the degradatio...

Embodiment 3

[0048] 1. After the pH value of the wastewater is adjusted, the pH value of the influent water is adjusted to 7.5, and enters the hydrolytic acidification tank. The hydrolytic acidification reaction is controlled by controlling the hydraulic retention time. The reaction of organic matter in this stage is only the hydrolytic acidification stage. The residence time of the pool is 8-9 hours. Within this time range, the first two stages of anaerobic fermentation, namely hydrolysis and acidification, can be used to degrade most of the high-molecular toxic substances such as oxytetracycline in the wastewater into low-molecular organic substances. , to facilitate subsequent biological treatment.

[0049] The hydrolytic acidification process does not require strict anaerobic conditions, so the operating conditions are easier to control, and the residence time is short, which can adapt to higher COD and BOD loads. This process improves the biodegradability of wastewater and reduces the...

technical field

[0001] The invention relates to a system and a process for treating oxytetracycline wastewater by anaerobic biological method. Background technique

[0002] Terramycin (Oxytetracycline) molecular formula is as follows, chemical name: 6-methyl-4-(dimethylamino)-3,5,6,10,12,12a-hexahydroxy-1,11dioxo- 1,4,4a,5,5a,6,11,12a-Octahydro-2-tetracenecarboxamide.

[0003]

[0004] Oxytetracycline is a product of microbial fermentation. At present, the production process of Oxytetracycline in China mainly includes two steps: fermentation and extraction. Fermentation mainly uses nearly 10 kinds of organic matter such as starch, bean cake powder, and dextrin as raw materials, as the carbon source and energy for microbial synthesis, but the carbon entering the product only accounts for 9.8% of the input, while 90.2% of the carbon comes from waste gas, Discharged into the environment in the form of waste water and waste residues. The extraction process is to use oxalic...

Examples

Embodiment 1

[0034] 1. After the pH value of the wastewater is adjusted, the pH value of the influent water is adjusted to 6.5, and enters the hydrolytic acidification tank. The hydrolytic acidification reaction is controlled by controlling the hydraulic retention time. The reaction of organic matter in this stage is only the hydrolytic acidification stage. The residence time of the pool is 8-9 hours. Within this time range, the first two stages of anaerobic fermentation, namely hydrolysis and acidification, can be used to degrade most of the high-molecular toxic substances such as oxytetracycline in the wastewater into low-molecular organic substances. , to facilitate subsequent biological treatment.

[0035] The hydrolytic acidification process does not require strict anaerobic conditions, so the operating conditions are easier to control, and the residence time is short, which can adapt to higher COD and BOD loads. This process improves the biodegradability of wastewater and reduces the...

Embodiment 2

[0041] 1. After the pH value of the wastewater is adjusted, the pH value of the influent water is adjusted to 7, and then enters the hydrolytic acidification tank. The hydrolytic acidification reaction is to control the hydraulic retention time to control the reaction of organic matter at this stage. The residence time of the pool is 8-9 hours. Within this time range, the first two stages of anaerobic fermentation, namely hydrolysis and acidification, can be used to degrade most of the high-molecular toxic substances such as oxytetracycline in the wastewater into low-molecular organic substances. , to facilitate subsequent biological treatment.

[0042] The hydrolytic acidification process does not require strict anaerobic conditions, so the operating conditions are easier to control, and the residence time is short, which can adapt to higher COD and BOD loads. This process improves the biodegradability of wastewater and reduces the toxicity of wastewater due to the degradatio...

Embodiment 3

[0048] 1. After the pH value of the wastewater is adjusted, the pH value of the influent water is adjusted to 7.5, and enters the hydrolytic acidification tank. The hydrolytic acidification reaction is controlled by controlling the hydraulic retention time. The reaction of organic matter in this stage is only the hydrolytic acidification stage. The residence time of the pool is 8-9 hours. Within this time range, the first two stages of anaerobic fermentation, namely hydrolysis and acidification, can be used to degrade most of the high-molecular toxic substances such as oxytetracycline in the wastewater into low-molecular organic substances. , to facilitate subsequent biological treatment.

[0049] The hydrolytic acidification process does not require strict anaerobic conditions, so the operating conditions are easier to control, and the residence time is short, which can adapt to higher COD and BOD loads. This process improves the biodegradability of wastewater and reduces the...

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