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Anaerobic treatment method for landfill leachate

An anaerobic treatment and leachate technology, applied in anaerobic digestion treatment, biological sludge treatment, biological material pretreatment, etc., can solve the problems of rising treatment cost and idle biological treatment facilities, and achieve the effect of simple process

Inactive Publication Date: 2012-05-09
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention proposes an anaerobic treatment method for landfill leachate, which solves the problems that the leachate of middle-aged and old landfills cannot directly use biological treatment facilities, resulting in increased treatment costs and idle biological treatment facilities

Method used

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  • Anaerobic treatment method for landfill leachate

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Embodiment 1, adopt two-phase continuous type anaerobic digestion process, as figure 2 Shown:

[0034] 1. Sorting and crushing steps: Screen fresh biomass waste (including 50% kitchen waste, 45% fruit and vegetable waste, leaves, paper, etc.) to remove inorganic substances and impurities, and then crush to obtain particle size 5mm of biomass waste;

[0035] Two, characteristic analysis step: measure the moisture content a=75% of above-mentioned biomass waste, dry basis carbon content C 1 =48.95%, dry basis nitrogen content N 1 = 1.81%, measure the dry basis carbon content of landfill leachate C 2 =3.64%, dry basis nitrogen content N 2 = 2.47%;

[0036] 3. Hydrolysis and acidification step: put the above-mentioned biomass waste into the closed hydrolysis and acidification reactor 1, control the temperature at 55°C, stir for 3 days, and obtain the acidification material;

[0037] 4. Initial batching step: transfer 100g of the acidified material to the batching tank...

Embodiment 2

[0041] Embodiment 2, adopt two-phase continuous type anaerobic digestion process, as figure 2 Shown:

[0042] 1. Sorting and crushing steps: Screen fresh biomass waste (including 50% kitchen waste, 45% fruit and vegetable waste, leaves, paper, etc.) to remove inorganic substances and impurities, and then crush to obtain particle size 5mm of biomass waste;

[0043] Two, characteristic analysis step: measure the moisture content a=75% of above-mentioned biomass waste, dry basis carbon content C 1 =48.95%, dry basis nitrogen content N 1 = 1.81%, measure the dry basis carbon content of landfill leachate C 2 =3.64%, dry basis nitrogen content N 2 = 2.47%;

[0044] Three, hydrolytic acidification step: the above-mentioned biomass waste is packed in the airtight hydrolysis acidification reactor 1, adopts Ca(OH) 2 Adjust the pH in the reactor to 9.0, control the temperature at 55°C, and stir for 3 days to obtain acidified material (water content 80%);

[0045] 4. Initial batch...

Embodiment 3

[0049] Embodiment 3, adopt two-phase continuous type anaerobic digestion process, as figure 2 Shown:

[0050] 1. Sorting and crushing steps: Screen fresh biomass waste (including 50% kitchen waste, 45% fruit and vegetable waste, leaves, paper, etc.) to remove inorganic substances and impurities, and then crush to obtain particle size 10mm of biomass waste;

[0051] Two, characteristic analysis step: measure the moisture content a=75% of above-mentioned biomass waste, dry basis carbon content C 1 =48.95%, dry basis nitrogen content N 1 = 1.81%, measure the dry basis carbon content of landfill leachate C 2 =3.64%, dry basis nitrogen content N 2 = 2.47%;

[0052] 3. Hydrolysis and acidification step: put the above-mentioned biomass waste into the airtight hydrolysis and acidification reactor 1, adjust the pH in the reactor to 11.0 with NaOH, control the temperature at 30° C., stir for 2 days, and obtain the acidification material (moisture content is 78%);

[0053] 4. Ini...

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Abstract

The invention relates to an anaerobic treatment method for landfill leachate, belonging to solid waste treatment methods and solving the problems of increased treatment cost and idle biological treatment facilities because the biological treatment facilities cannot be directly used for treating mature landfill leachate. Continuous feeding is adopted in the method provided by the invention, and the method is suitable for larger-scale treatment occasions and sequentially comprises a separating and crushing step, a characteristic analysis step, a hydrolytic acidification step, an initial burdening step, a burdening step and a methane generating step. Sequential batch type feeding is adopted in another method provided by the invention, and the method is suitable for smaller-scale treatment occasions and sequentially comprises a separating and crushing step, a characteristic analysis step, a burdening step and a methane generating step. The anaerobic treatment method for the landfill leachate has a simple process, can effectively utilize original facilities, and has an obvious promotion effect on the anaerobic digestion reaction of mixed materials, the biodegradability of residential methane liquid is obviously superior to the landfill leachate, and the treatment cost is obviously lower than that of a physico-chemical treatment mode or a membrane treatment mode for treating the landfill leachate.

Description

technical field [0001] The invention belongs to a solid waste treatment method, in particular to a landfill leachate anaerobic treatment method. The landfill leachate is mixed with biomass waste and then anaerobically digested to improve the biodegradability of the landfill leachate. At the same time, the efficiency of anaerobic digestion gas production is improved. Background technique [0002] 54.6% of my country's municipal solid waste is disposed of by landfill, and the content of perishable organic matter as high as 60% leads to high concentrations of organic matter and ammonia nitrogen in landfill leachate. At present, the commonly used landfill leachate treatment methods include three methods: biological treatment, physicochemical treatment and membrane treatment. The three methods are generally used in combination to ensure that the effluent discharges up to the standard. Among them, biological treatment has high operating costs and is generally used to remove degra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12M1/107B09B3/00C02F11/04C02F3/28
CPCY02E50/343C12M45/04C12M21/04C12M45/06C12M45/02C12M27/02Y02E50/30
Inventor 廖利卢加伟廖筱锋
Owner HUAZHONG UNIV OF SCI & TECH