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Agent special for bioleaching municipal sludge and production process thereof

A technology of biological leaching and urban sludge, applied in the field of environmental engineering, can solve problems such as poor effect

Active Publication Date: 2013-08-07
NANJING AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of agent mainly includes the agent that provides energy and nutrition for bioleaching compound microorganisms (composite flora composed of thiobacillus and acid-resistant heterotrophic bacteria). It is a compound agent and a bioleaching agent composed of a single substance. often less effective

Method used

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Embodiment Construction

[0024] The best embodiment of the invention.

[0025] Special agent for municipal sludge bioleaching, containing: Ammonium sulfate, 3000mg / kg; Potassium chloride, 200mg / kg; Dipotassium hydrogen phosphate, 2000mg / kg; Calcium nitrate, 400mg / kg; Magnesium sulfate heptahydrate, 500mg / kg ;Vitamin B, vitamin C, 3000mg / kg; Trace elements manganese sulfate heptahydrate, zinc sulfate heptahydrate, boric acid, sodium molybdate, 3200mg / kg, carbon source material starch, formic acid, 6000mg / kg, sodium thiosulfate pentahydrate , 200g / kg; modified sulfur powder, 200g / kg; 100 mesh refined pyrite (FeS 2 ) or ferrous sulfate heptahydrate, 100g / kg; biosurfactant rhamnosyl ester, 600mg / kg; diatomaceous earth, added to 100 parts. The process steps for producing the above-mentioned 1 ton of municipal sludge bioleaching special agent include:

[0026] 1) Weigh respectively ammonium sulfate, 3 kg; potassium chloride, 0.2 kg; dipotassium hydrogen phosphate, 2 kg; calcium nitrate, 0.4 kg; magnesium ...

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Abstract

The invention provides an agent special for bioleaching municipal sludge, which belongs to the technical field of engineering technology. The agent for bioleaching the municipal sludge contains a carbon source and nutrient substances, which are needed by the growth of thiobacillus and acid-resistant heterotrophic bacteria, including ammonium sulfate, potassium chloride, dipotassium phosphate, calcium nitrate, magnesium sulfate, vitamins, trace elements, carbon source substances, sodium thiosulfate, sulphur powder, finished pyrite or ferrous sulfate heptahydrate, surfactant, dressing and the like. The production process comprises the following steps of: adsorbing a liquid material on diatomite serving as the dressing; and fully mixing the liquid material, other solid materials and the diatomite serving as the dressing to obtain the agent. The agent can meet the growth demands of various microorganisms in a bioleaching composite microorganism at the same time and greatly improve sludge bioleaching efficiency.

Description

1. Technical field [0001] The invention relates to a special agent for biological leaching treatment of municipal sludge, which belongs to the technical field of environmental engineering. 2. Background technology [0002] As of the end of 2009, my country's urban sewage treatment plants have reached 1993, with a daily sewage treatment of more than 100 million M 3 , produces nearly 40 million tons of dewatered sludge (water content 80-85%) annually. Since the urban sludge in our country is mainly the residual sludge discharged after the secondary biochemical treatment of the sewage treatment plant or the mixed sludge mixed with the primary sedimentation tank, it has high organic matter content and strong hydrophilicity. Acrylamide (PAM) flocculates, so the water content of dewatered sludge is high (80%-85%), which adds great difficulty to subsequent disposal. On the other hand, some urban sewage treatment plants in my country, especially those in some industrial parks, rec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/02C02F11/14
Inventor 周立祥
Owner NANJING AGRICULTURAL UNIVERSITY
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