Method of preparing humus and recovering heavy-metal-polluted bottom mud with humus

A technology for polluting sediment and humus, applied in water pollutants, sludge treatment, chemical instruments and methods, etc., to achieve low cost, low heavy metal concentration and potential toxicity, and realize the effect of resource utilization

Active Publication Date: 2018-07-31
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for preparing humus and repairing heavy metal-contaminated bottom mud in view of the deficiencies in the current river and lake bottom mud treatment technology, which can reduce the harm of heavy metals to the aquatic ecological environment, and is more efficient and environmentally friendly. Bring in new heavy metal pollution

Method used

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  • Method of preparing humus and recovering heavy-metal-polluted bottom mud with humus
  • Method of preparing humus and recovering heavy-metal-polluted bottom mud with humus
  • Method of preparing humus and recovering heavy-metal-polluted bottom mud with humus

Examples

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Embodiment 1

[0042] A method for preparing humus and repairing heavy metal contaminated bottom sludge, specifically using sesame straw compost to produce humus and leaching and repairing heavy metal bottom sludge, including the following steps:

[0043] 1. Compost design and humus extraction:

[0044] A. Use a 50L plastic box to perform composting experiments in aerobic composting mode. Five holes are evenly drilled on the lid of the plastic box, and 40mm thick foam is attached to the surface of the box body to reduce heat loss. According to a certain ratio of composting raw materials (sesame straw: sawdust: soybean meal: humus: grape pomace = 5: 2: 1: 2:0), adjust the pile body C / N to 25 with urea, and adjust the moisture content to 60%, inoculate 50mL mixed bacteria per kg of compost raw materials, spore suspension 2×10 6 ML -1 Among them, white rot fungi accounted for 60%, green wood enzyme accounted for 40%, aerobic composting for 60 days, turning the pile twice a week;

[0045] B. After co...

Embodiment 2

[0052] A method for preparing humus and repairing heavy metal contaminated bottom sludge, specifically using peanut straw compost to produce humus and leaching and repairing heavy metal bottom sludge, including the following steps:

[0053] 1. Compost design and humus extraction:

[0054] A. Use a 50L plastic box to conduct composting experiments in aerobic composting mode. Five holes are evenly drilled on the lid of the plastic box, and 40mm thick foam is attached to the surface of the box body to reduce heat loss. According to the mass ratio of composting raw materials: peanut stalks: wood chips: soybean meal: humus: grape pomace = 5:2:1:2:0, adjust the pile C / N to 25 with urea, and adjust the moisture content to 60% with ultrapure water , Inoculate 50mL mixed bacteria per kg of compost raw materials, spore suspension 2×10 6 ML -1 Among them, white rot fungi accounted for 60%, green wood enzymes accounted for 40%, aerobic composting for 60 days, turning the pile twice a week;

[...

Embodiment 3

[0062] A method for preparing humus and repairing heavy metal contaminated bottom sludge specifically includes using corn stalk compost to produce humus and leaching and repairing heavy metal bottom sludge, including the following steps:

[0063] 1. Compost design and humus extraction:

[0064] A. Use a 50L plastic box to conduct composting experiments in aerobic composting mode. Five holes are evenly drilled on the lid of the plastic box, and 40mm thick foam is attached to the surface of the box body to reduce heat loss. According to the mass ratio of composting raw materials, corn stalks: wood chips: soybean meal: humus: grape pomace = 5: 2: 1: 2:0 for aerobic composting for 60 days, using urea to adjust the pile body C / N to 20, ultra-pure water Adjust the moisture content to 60%, inoculate 50mL mixed bacteria per kg of compost raw materials, and the spore suspension 2×10 6 ML -1 Among them, white rot fungi accounted for 60%, green wood enzymes accounted for 40%, aerobic compost...

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Abstract

The invention discloses a method of preparing humus and recovering heavy-metal-polluted bottom mud with the humus. Green waste, wood dust, bean pulp, humus soil and / or grape residues are proportionedon the basis of the compost raw material mass proportion of (4.5-5.5):(1.8-2.2):1:(1.8-2.2):(1.8-2.2), wherein the green waste is one or more of peanut straws, corn straws, sesame straws and maple leaves; a C / N mass ratio and moisture content are adjusted, white-rot fungi and trichoderma viride are inoculated, and aerobic composting is conducted; after composting, the humus in the mixture is extracted. According to the method of preparing humus and recovering the heavy-metal-polluted bottom mud with the humus, the polluted bottom mud is leached with a humus solution to remove heavy metal and complete a recovery process. The humus in an extractable state generated through green waste composting serves as a leaching agent, which makes the method more efficient and environmentally friendly, no new heavy metal pollution can be generated, the cost is low, and humus generation through composting achieves waste recycling better.

Description

Technical field [0001] The invention belongs to the technical field of sediment pollution restoration in environmental and water conservancy projects, and particularly relates to a method for preparing humus and repairing heavy metal polluted sediment. Background technique [0002] Bottom mud is the long-term accumulation of sediments at the bottom of water bodies such as rivers, lakes, reservoirs and bays. It is an important part of the multi-phase ecosystem of water bodies and the gathering place of environmental pollutants in a wide space and a long time. The pollution of the bottom sludge of the water body is an important factor to comprehensively measure the quality of the water environment. The sediments of rivers and lakes contain a lot of heavy metals, which are highly toxic, difficult to degrade, and easy to accumulate, which seriously threaten the aquatic ecosystem and human health. Heavy metals in water bodies often use bottom sludge as the final storage and destinati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F101/20
CPCC02F11/00C02F2101/20
Inventor 文嘉张思宇曾光明方颖章海波
Owner HUNAN UNIV
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