Spray washing method for removing heavy metal from domestic garbage compost

A technology for domestic garbage and garbage composting, which is used in the removal of solid waste, organic fertilizers, climate change adaptation, etc. Effect

Inactive Publication Date: 2007-05-16
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0023] A leaching method for removing heavy metals and remediating domestic waste composting pollution with a surfactant and its organic acid; it is characterized in that the implementation method is as follows:

[0024] To prepare rinse aid:

[0025] Separately prepare a single sodium dodecylbenzenesulfonate (LAS), DL-malic acid, and citric acid eluents, and each solution is prepared in three concentrations of 10mmol / L, 20mmol / L, and 30mmol / L;

[0026] The test materials are garbage compost collected from Xiaodian Garbage Treatment Plant in Hebei District, Tianjin. Such as: weighing 100g of garbage compost as the experimental standard. The water holding capacity of garbage compost is 0.755ml / g, the bulk density is 0.85g / ml, and the heavy metal elements Mn, Ni, Cu, Zn and Cd in each gram of garbage compost are 530.57μg, 33.415μg, 238.725μg, 496.38μg, 1.9675μg respectively .

[0027] Rinse steps:

[0028] (1) Carry out pretreatment to garbage composting, remove plastic film...

Embodiment 2

[0033] Using LAS, DL-malic acid;

[0034] Set the concentration of DL-malic acid to 20mmol / L, (it can be set within the range of 10mmol / L-30mmol / L)

[0035] Change the concentration of LAS to 10mmol / L, 20mmol / L, 30mmol / L respectively;

[0036] Or set the concentration of LAS to 20mmol / L, (it can be set within the range of 10mmol / L-30mmol / L)

[0037] Change the concentration of DL-malic acid to 10mmol / L, 20mmol / L, 30mmol / L respectively.

[0038] Garbage compost was selected as the test material, and the garbage compost was pretreated first, and 100g of garbage compost was weighed as the experimental standard. The water holding capacity of garbage compost is 0.755ml / g, the bulk density is 0.85g / ml, and the heavy metal elements Mn, Ni, Cu, Zn and Cd in each gram of garbage compost are 530.57μg, 33.415μg, 238.725μg, 496.38μg, 1.9675μg respectively .

[0039] Rinse steps:

[0040] (1) Carry out pretreatment to garbage composting, remove plastic film, brick tile, stone, glass a...

Embodiment 3

[0045] Using LAS, citric acid;

[0046] Set the concentration of citric acid to 20mmol / L, (it can be set within the range of 10mmol / L-30mmol / L)

[0047] Change the concentration of LAS to 10mmol / L, 20mmol / L, 30mmol / L respectively;

[0048] Or set the concentration of LAS to 20mmol / L, (it can be set within the range of 10mmol / L-30mmol / L)

[0049] Change the concentration of citric acid to 10mmol / L, 20mmol / L, 30mmol / L respectively.

[0050] Garbage compost was selected as the test material, and the garbage compost was pretreated first, and 100g of garbage compost was weighed as the experimental standard. The water holding capacity of garbage compost is 0.755ml / g, the bulk density is 0.85g / ml, and the heavy metal elements Mn, Ni, Cu, Zn and Cd in each gram of garbage compost are 530.57μg, 33.415μg, 238.725μg, 496.38μg, 1.9675μg respectively .

[0051] Rinse steps:

[0052] (1) Carry out pretreatment to garbage composting, remove plastic film, brick tile, stone, glass and oth...

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Abstract

The invention discloses a leaching method to remove heavy metal and restore living rubbish piling fertilizer, which allocates kinds of density of surface activator LAS, DL-malic acid, citrate single or composite leaching agent, wherein the leaching method comprises the following steps: (1) predisposing rubbish piling fertilizer; removing impurity such as plastic film, brick, stone and glass; (2) baking the fertilizer at 60-100 Deg C; removing water; drying for 2-8h; (3) placing rubbish piling fertilizer in the leakage device to collect leaching liquid; leaching the rubbish piling fertilizer; setting the weight of rubbish piling fertilizer and leaching agent at 1: 1-3; leaching for three times; collecting the leaching liquid.

Description

technical field [0001] The invention relates to a treatment method for composting municipal domestic garbage, in particular to a washing method for removing heavy metals and restoring composting of domestic garbage. Background technique [0002] At present, with the rapid development of the economy and the continuous improvement of living standards, municipal solid waste is increasing at a rate of 8%. Garbage has become a thorny problem in the development of urban society, not only causing public hazards to society and the environment, but also causing a huge waste of resources. Nowadays, people's awareness of environmental protection is increasing day by day, and their understanding of sustainable development issues is deepening. It has been accepted by more and more people that municipal solid waste should be treated as a resource. The problem of domestic waste disposal in China is urgent. In addition to simple recycling of some items in urban waste, how to further deepe...

Claims

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Application Information

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IPC IPC(8): C05F9/04B09B3/00
CPCY02A40/20
Inventor 多立安赵树兰梦婕
Owner TIANJIN NORMAL UNIVERSITY
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