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Production technology of preparing aminosal using hydrolysed residual active sludge by quick lime and its equipment

A technology for hydrolyzing protein and residual activity is applied in the field of preparing hydrolyzed protein by hydrolyzing residual activated sludge with quicklime.

Active Publication Date: 2006-11-29
武汉市城市排水发展有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its process pressure is low, the process temperature is low, and the protein extraction rate is low, so it is not suitable for industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) Pre-treatment of excess activated sludge: Add 2 tons of excess activated sludge, 2 tons of water, and 120kg of quicklime (in a ratio of 1:1:0.06) to 10m 3 In the mixing tank, cover the airtight lid, stir it electrically for 20 minutes, and pump the evenly stirred mixture into the 5m 3 Hydrolysis reactor.

[0017] 2) Hydrolysis: Seal the hydrolysis reaction kettle, pass steam into the reaction kettle, and discharge cold air at the same time, close the exhaust valve when the temperature rises by about 100°C; under the conditions of working pressure of 0.5Mpa and hydrolysis temperature of 145°C, The hydrolysis time is 2.5h, and the mixed solution is hydrolyzed. During the hydrolysis process, keep warm and at the same time, steam is introduced to stir the hydrolysis mixture.

[0018] 3) Filtration: after the hydrolysis is completed, use a specification of 80m 2 plate and frame filter.

[0019] 4), concentrated filtrate: adjust the pH value of the filtrate to 7.0-8.5....

Embodiment 2

[0022] 1) Pretreatment of excess activated sludge: add 4 tons of excess activated sludge, 4 tons of water, and 240 kg of quicklime (in a ratio of 1:1:0.06) to 15m 3 In the mixing tank, cover the airtight lid, stir it electrically for 20 minutes, and pump the evenly stirred mixture into two 5m 3 Hydrolysis reactor.

[0023] 2) Hydrolysis: seal the hydrolysis reaction kettle, pass steam into the reaction kettle, and discharge cold air at the same time, close the exhaust valve when the temperature rises by about 100°C; under the conditions of working pressure of 0.6Mpa and hydrolysis temperature of 155°C, The hydrolysis time is 2 hours, and the mixed solution is hydrolyzed. During the hydrolysis process, keep warm and at the same time, steam is introduced to stir the hydrolysis mixture.

[0024] 3) Filtration: after the hydrolysis is completed, use a specification of 80m 2 plate and frame filter.

[0025] 4) Concentrate the filtrate: adjust the pH value of the filtrate to 7.0...

Embodiment 3

[0028] 1) Pre-treatment of excess activated sludge: Add 2 tons of excess activated sludge, 2 tons of water, and 120kg of quicklime (in a ratio of 1:1:0.06) to 10m 3 In the mixing tank, cover the airtight lid, stir it electrically for 20 minutes, and pump the evenly stirred mixture into the 5m 3 Hydrolysis reactor.

[0029] 2) Hydrolysis: seal the hydrolysis reaction kettle, pass steam into the reaction kettle, and discharge cold air at the same time, close the exhaust valve when the temperature rises by about 100°C; under the conditions of working pressure of 0.4Mpa and hydrolysis temperature of 135°C, The hydrolysis time is 3 hours, and the mixed solution is hydrolyzed. During the hydrolysis process, keep warm and at the same time, steam is introduced to stir the hydrolysis mixture.

[0030] 3) Filtration: after the hydrolysis is completed, use a specification of 80m 2 plate and frame filter.

[0031] 4), concentrated filtrate: adjust the pH value of the filtrate to 7.0-8...

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Abstract

A process for preparing hydrolytic protein by using the calcium lime to hydrolyze the residual active sludge includes such steps as proportionally mixing residual active sludge, water and calcium line, stirring, hydrolyzing reaction, filtering, using hydrochloric acid to regulate pH=7.0-8.5, concentrating and drying. Its apparatus is also disclosed.

Description

technical field [0001] The invention relates to a technology for treating urban domestic sewage sludge, in particular to a production process and equipment for preparing hydrolyzed protein by hydrolyzing residual activated sludge with quicklime. Background technique [0002] There is a large amount of surplus activated sludge in urban domestic sewage treatment, which contains a large amount of organic matter. The annual output of large cities is about 500,000 tons, which has begun to cause secondary pollution; its treatment or reuse mainly includes the following aspects: 1. Fertilizer; 2. Incineration; 3. Used as building materials; 4. Landfill ; 5. Throwing into the sea; 6. Biochemical sludge reduction treatment, but the above methods have many shortcomings in the treatment or reuse of excess sludge. [0003] At present, the fire extinguishing agent used in the field of fire extinguishing is mainly Al(OH) 3 Foam fire extinguishing agent and NaHCO3, NaCl dry powder fire ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00
Inventor 汪常青李亚东梁浩
Owner 武汉市城市排水发展有限公司
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