Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for producing fertilizer by stewing mixture of stalk and sludge by alkaloid substance

A kind of mixture and material technology, applied in the direction of sewage/sludge fertilizer, fertilizer mixture, organic fertilizer, etc., can solve the problem of high moisture content, achieve the effects of short reaction time, shortened maturity time, and improved maturity

Inactive Publication Date: 2010-01-13
HEBEI NORMAL UNIV
View PDF5 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The idea of ​​the present invention is as follows: the present invention aims at the fertilizer utilization of straw mainly to solve the problem of how to realize fast decomposing transformation and improving the degree of decomposing, that is, to increase the content of soluble humic acid in the transformed decomposing products; for the fertilizer utilization of sludge, the main It is to solve the problem of high moisture content and the problem of sterilization and deodorization; at the same time, the use of straw or sludge waste to prepare organic fertilizer should consider energy saving and water saving

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take 200 kilograms of activated sludge (water content 82%) produced by an organic wastewater treatment plant of a brewing enterprise, add 3.2 kilograms of solid potassium hydroxide and 0.5 kilograms of powdered sodium pyrophosphate, mix well, and then add 40 kilograms of crushed dry wheat straw Kilogram (moisture content 5%), mix evenly, put into the steaming ball, keep the steaming ball rotating at a slow speed, heat to 150-165°C with high-pressure steam, and then keep it for 2 hours. Stop heating and turning, after cooling to 100°C, add 2 liters of 20% sulfuric acid aqueous solution, turn the steaming ball and stir for 10 minutes to neutralize the material. Then, emit the slurry obtained by cooking, and obtain 92 kilograms of granular organic fertilizer products by spraying granulation. The indicators of the product are: the appearance is black, the organic matter is 58.6%, the total nutrient (N+P 2 o 5 +K 2 O) 10.2%, humic acid 19.3%, moisture 17.5%.

Embodiment 2

[0018] Take 200 kg of activated sludge (water content 76%) produced by an organic wastewater treatment plant of a pharmaceutical company, add 4.8 kg of solid sodium hydroxide and 0.5 kg of powdered sodium pyrophosphate, mix well, then add crushed and pass through 20 mesh 30 kg of dry corn stalk powder (moisture content 4%) in the sieve, mix evenly, put into steaming balls, keep the steaming balls in the state of slow rotation, heat to 130-140°C with high-pressure steam, and then keep for 4 Hour. Stop heating and turning, after cooling to 100°C, add 1.8 kg of solid oxalic acid, turn the steaming ball and stir for 10 minutes to neutralize the material. Then, emit the slurry obtained by cooking, transfer to the cooling pool and drop to close to room temperature, then add 30 kilograms of urea containing nitrogen (N) amount 46%, phosphorus pentoxide (P 2 o 5 ) 46% heavy superphosphate 20 kg, containing potassium oxide (K 2 (0) 15 kilograms of potassium chloride of 60%, after hot...

Embodiment 3

[0020]Take 200 kg of activated sludge (water content 80%) produced by an organic wastewater treatment plant of a slaughtering enterprise, add 4 kg of solid potassium hydroxide, 0.5 kg of powdered sodium pyrophosphate, mix well, and then add crushed cotton stalk powder 20 kg (moisture content 3.5%), mix evenly, put into self-made cooking tank, keep the cooking tank rotating at a slow speed, heat to 155-165°C with high-pressure steam, then keep for 3 hours. Stop heating and rotating, after cooling to 100 DEG C, add 2.3 kilograms of citric acid solids, rotate the cooking pot and stir for 10 minutes to neutralize the material. Then, the slurry obtained by cooking is released. Separate the filtrate and filter residue with a centrifuge equipped with a 60-mesh filter cloth. The filtrate thus obtained was about 155 kg. Add 15 kilograms of industrial potassium sulfate, stir and dissolve to obtain 170 kilograms of potassium humate liquid fertilizer. The prepared liquid fertilizer app...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for producing a fertilizer by stewing a mixture of stalks and sludge by alkali substances, which mainly takes the mixture of concentrated sludge and vegetal stalk powder as raw materials and comprises the following technology steps: adding a medicament formed by a right quantity of alkali substances and sodium pyrophosphate into the mixture of the concentrated sludge and the vegetal stalk powder to be stewed for 0.5-6 hours under the temperature between 110 DEG C and 170 DEG C; neutralizing the mixture to pH=4-9 by an inorganic acid or an organic acid; and directly preparing a commodity organic fertilizer, or adding a right quantity of chemical fertilizers, i.e. nitrogen, phosphorus, kalium, trace elements, and the like to the mixture to prepare an organic-inorganic compound fertilizer, or separating the mixture to prepare a liquid organic fertilizer. The invention has simple technology and high rotten conversion speed of the raw materials, can achieve the purpose of the sterilization, the disinfection and the deodorization of the raw materials, has high organic matter and humic acid content of products and high fertilizer efficiency of the products and can realize the large-scale and low-cost fertilization utilization of the sludge and agricultural stalk wastes.

Description

technical field [0001] The invention relates to a method for producing fertilizer by cooking straw and sludge mixture with alkaline substances, and belongs to the technical field of resource utilization and pollution prevention and control. Background technique [0002] Wastes including crop stalks, wood material processing residues, agricultural and sideline product processing waste, and livestock and poultry excrement are inevitable products in the process of agricultural and forestry production and product processing, with a wide range of sources and large quantities. These wastes are biomass organic matter, mainly composed of plant cellulose, hemicellulose, lignin, pectin and other components, and also contain a small amount of nitrogen, phosphorus, potassium and trace elements. At present, the mainstream process of organic wastewater and urban wastewater treatment produced by various industrial enterprises is biological method, and sludge is an inevitable secondary prod...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C05F15/00C05G1/00C05F11/00C05F7/00
CPCY02A40/20
Inventor 马子川李素伟简广福
Owner HEBEI NORMAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com