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Treatment method of landfill leachate concentrate

A technology for landfill leachate and a treatment method, which is applied in the field of landfill leachate concentrate treatment, can solve the problems of inability to achieve standard discharge, volatile organic matter, and high energy consumption, and achieves the effect of good environmental protection benefits.

Inactive Publication Date: 2020-11-27
山东达源环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conventional evaporation process can separate the soluble solids from the water in the landfill leachate concentrate, but the energy consumption is high, and some organic matter is volatile and easily enters the vapor phase during the evaporation process, resulting in a high COD concentration in the condensate, which cannot meet the standard emission

Method used

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  • Treatment method of landfill leachate concentrate
  • Treatment method of landfill leachate concentrate
  • Treatment method of landfill leachate concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The treatment method of the landfill leachate concentrate specifically comprises the following steps:

[0025] (1) Add 0.5kg of xanthate to every 100kg of landfill leachate concentrate, stir at a speed of 250r / min for 8min, let stand for 1.5h, and filter to obtain concentrate I;

[0026] (2) Add 1.5kg of sodium sulfate and 1.5kg of calcium sulfate successively to every 100kg of concentrated solution I, and stir at a speed of 150r / min for 20min to obtain concentrated solution II;

[0027] (3) Add 300kg of slag portland cement to every 100kg of concentrated solution II, stir at a speed of 100r / min for 12min, solidify for 2d, and landfill.

Embodiment 2

[0029] The treatment method of the landfill leachate concentrate specifically comprises the following steps:

[0030] (1) Add 0.4kg of sodium dithiocarbamate to every 100kg of landfill leachate concentrate, stir at a speed of 200r / min for 5min, let stand for 1h, and filter to obtain concentrate Ⅰ;

[0031] (2) Add 1 kg of sodium sulfate and 1 kg of calcium sulfate successively to every 100 kg of concentrated solution I, and stir at a speed of 100 r / min for 15 minutes to obtain concentrated solution II;

[0032] (3) Add 200kg of slag Portland cement to every 100kg of concentrate II, stir at 80r / min for 10min, solidify for 1d, and landfill.

Embodiment 3

[0034] The treatment method of the landfill leachate concentrate specifically comprises the following steps:

[0035] (1) Add 0.6 kg of sodium dimethyldithiocarbamate to every 100 kg of landfill leachate concentrate, stir at a speed of 300 r / min for 10 min, let stand for 2 hours, and filter to obtain concentrate I;

[0036] (2) Add 2kg of sodium sulfate and 2kg of calcium sulfate successively to every 100kg of concentrated solution I, and stir at a speed of 200r / min for 30min to obtain concentrated solution II;

[0037] (3) Add 400kg of fly ash Portland cement to every 100kg of concentrate II, stir at 120r / min for 15min, solidify for 2d, and landfill.

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Abstract

The invention discloses a treatment method of A landfill leachate concentrate, specifically comprising the following steps of: (1) adding a heavy metal ion precipitation agent to a landfill leachate concentrate, stirring, standing, and filtering to obtain a concentrate I; (2) sequentially adding sodium sulfate and calcium sulfate into the concentrate I, and stirring to obtain a concentrate II; and(3) adding Portland slag cement or Portland fly-ash cement into the concentrate II, stirring, curing and landfilling. According to the invention, the Portland slag cement or Portland fly-ash cement is used to solidify the landfill leachate concentrate therein, thereby achieving the purposes of harmlessness and stabilization, and effectively solving the treatment problem of the landfill leachate concentrate.

Description

technical field [0001] The invention relates to the technical field of environmental protection engineering, in particular to a treatment method for concentrated landfill leachate. Background technique [0002] Over the years, most of my country's urban domestic waste has been disposed of by landfill, and a large amount of landfill leachate will be produced in the process of landfill disposal of urban domestic waste. With the improvement of national environmental protection requirements and the advancement of water treatment technology, the "biochemical + membrane treatment" process has gradually become a mainstream technology for landfill leachate treatment. Among them, the biochemical method can remove most of the organic matter in landfill leachate, effectively To reduce COD and ammonia nitrogen content, membrane treatment can intercept refractory organic pollutants after biochemical treatment. [0003] Due to the selective permeability of nanofiltration membranes and re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/20C02F101/22C02F103/06
CPCC02F9/00C02F1/001C02F2001/007C02F1/62C02F2103/06C02F2101/20C02F2101/22C02F2101/206
Inventor 严希海原泽
Owner 山东达源环保工程有限公司
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