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A kind of humus preparation and method for repairing heavy metal polluted sediment

A technology for polluting sediment and humus, applied in the direction of sludge treatment, water pollutants, 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: 2020-08-07
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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  • A kind of humus preparation and method for repairing heavy metal polluted sediment
  • A kind of humus preparation and method for repairing heavy metal polluted sediment
  • A kind of humus preparation and method for repairing heavy metal polluted sediment

Examples

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Embodiment 1

[0042] A method for preparing humus and repairing heavy metal-contaminated sediment, specifically using sesame stalks to compost to produce humus and washing and repairing heavy metal sediment, comprising the following steps:

[0043] 1. Design of compost and extraction of humus:

[0044] A. The composting experiment was carried out in the way of aerobic composting with a 50L plastic box. Drill 5 holes evenly on the cover of the plastic box, and paste 40mm thick foam on the surface of the box to reduce heat loss. According to a certain proportion of composting raw materials (sesame straw: sawdust: soybean meal: humus: grape pomace = 5:2:1:2:0), adjust the C / N of the heap to 25 with urea, and adjust the moisture content to 25 with ultrapure water. 60%, inoculate 50mL of mixed bacteria per kg of compost raw materials, spore suspension 2×10 6 mL -1 , of which white rot fungi account for 60%, green wood enzymes account for 40%, aerobic composting for 60 days, turning the compos...

Embodiment 2

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

[0053] 1. Design of compost and extraction of humus:

[0054] A. The composting experiment was carried out in the way of aerobic composting with a 50L plastic box. Drill 5 holes evenly on the cover of the plastic box, and paste 40mm thick foam on the surface of the box to reduce heat loss. According to the mass ratio of composting raw materials, peanut straw: sawdust: soybean meal: humus: grape pomace = 5:2:1:2:0, adjust the C / N of the heap to 25 with urea, and adjust the moisture content to 60% with ultrapure water , inoculate 50mL of mixed bacteria per kg of compost raw materials, spore suspension 2×10 6 mL -1 , of which white rot fungi account for 60%, green wood enzymes account for 40%, aerobic composting for 60 days, turning the compost twice a wee...

Embodiment 3

[0062] A method for preparing humus and repairing heavy metal-contaminated sediment, specifically, composting corn stalks to produce humus and leaching and repairing heavy metal sediment, comprising the following steps:

[0063] 1. Design of compost and extraction of humus:

[0064] A. The composting experiment was carried out in the way of aerobic composting with a 50L plastic box. Drill 5 holes evenly on the cover of the plastic box, and paste 40mm thick foam on the surface of the box to reduce heat loss. Carry out aerobic composting for 60 days according to the mass ratio of composting raw materials: corn stalks: sawdust: soybean meal: humus: grape pomace = 5:2:1:2:0, use urea to adjust the C / N of the heap to 20, and use ultrapure water Adjust the water content to 60%, inoculate 50mL of mixed bacteria per kg of compost raw materials, spore suspension 2×10 6 mL -1 , of which white rot fungi account for 60%, green wood enzymes account for 40%, aerobic composting for 60 day...

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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 environment and water conservancy projects, and in particular relates to a method for preparing humus and restoring heavy metal-polluted sediment. Background technique [0002] Sediment is the long-term accumulated sediment 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 it is the place where environmental pollutants gather in a wide space and for a long time. The pollution status of water body sediment is an important factor to comprehensively measure the quality of water environment. River and lake sediments contain a large amount of heavy metals, which are highly toxic, difficult to degrade, and easy to accumulate, posing a serious threat to aquatic ecosystems and human health. Heavy metals in water often use sediment as the final storage and destination, and can mainta...

Claims

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Application Information

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Patent Type & Authority Patents(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