Method for treating leachate of garbage transfer station

Abstract

The invention discloses a method for treating leachate of a garbage transfer station. The method specifically comprises the following steps of: (1) sequentially introducing the leachate of the garbagetransfer station into a neutralization tank, a coagulation tank and a flocculation tank for pretreatment; (2) introducing the leachate into a denitrification tank for denitrification treatment; (3) introducing the leachate into an aerobic biochemical pool for biochemical treatment, and aerating to decompose organic pollutants; (4) introducing the leachate into a membrane bioreactor to biochemically degrade organic pollutants; and (5) introducing the leachate into an activated carbon pool, carrying out adsorbing and filtering and directly discharging the leachate. The treatment method disclosed by the invention not only can enable the discharge index of wastewater obtained after leachate treatment of the garbage transfer station to meet the requirements, but also can ensure that various organic matters, heavy metals and salts do not generate secondary pollution, and is environment-friendly and practical.

Description

technical field

[0001] The invention relates to the technical field of environmental protection engineering, in particular to a treatment method for leachate of a garbage transfer station. Background technique

[0002] With the advancement of my country's urbanization and the continuous improvement of people's living standards, the daily amount of garbage in my country's cities has also continued to increase, and a large number of garbage transfer stations have also begun to be constructed and used. A large amount of landfill leachate is produced. The leachate of the garbage transfer station is high-concentration organic wastewater, which needs to be transferred to a qualified sewage treatment plant for treatment, but the transportation cost of the wastewater transfer process is high, and it is easy to cause secondary pollution.

[0003] At present, the leachate of the garbage transfer station generally adopts biochemical + membrane treatment. Although the treatment effect o...

Examples

Embodiment 1

[0034] The treatment method for the leachate of the garbage transfer station specifically includes the following steps:

[0035] (1) Pretreatment: Introduce the leachate from the garbage transfer station into the neutralization tank in sequence, add sodium hydroxide to the neutralization tank, and adjust the pH value to 7.0 for neutralization treatment; introduce it into the coagulation tank, and pour it into the coagulation tank Add polyaluminum chloride, stay for 12 minutes for coagulation treatment; introduce flocculation tank, add polyacrylamide or polyethylene oxide into the coagulation tank, stay for 18 minutes for flocculation treatment, and obtain leachate Ⅰ;

[0036] (2) Denitrification treatment: introduce the leachate I into the denitrification tank, control the dissolved oxygen content of the denitrification tank to 0.4mg / L, the pH value to 7.5, the temperature to 25°C, and the number of colonies of nitrifying bacteria to be ≥ 10 7 CFU / mL, carry out denitrification...

Embodiment 2

[0041] The treatment method for the leachate of the garbage transfer station specifically includes the following steps:

[0042] (1) Pretreatment: Introduce the leachate from the garbage transfer station into the neutralization tank in sequence, add sodium hydroxide to the neutralization tank, and adjust the pH value to 7.0 for neutralization treatment; introduce it into the coagulation tank, and pour it into the coagulation tank Add polyaluminum chloride, stay for 10 minutes for coagulation treatment; introduce flocculation tank, add polyacrylamide into the coagulation tank, stay for 15 minutes for flocculation treatment, and obtain leachate Ⅰ;

[0043] (2) Denitrification treatment: introduce the leachate Ⅰ into the denitrification tank, control the dissolved oxygen content of the denitrification tank to 0.3mg / L, the pH value to 7.2, the temperature to 20°C, and the number of colonies of nitrifying bacteria to be ≥10 7 CFU / mL, carry out denitrification treatment to obtain le...

Embodiment 3

[0048]The treatment method for the leachate of the garbage transfer station specifically includes the following steps:

[0049] (1) Pretreatment: Introduce the leachate from the garbage transfer station into the neutralization tank in sequence, add potassium hydroxide to the neutralization tank, adjust the pH value to 8.0 for neutralization treatment; introduce it into the coagulation tank, and pour it into the coagulation tank Add polyaluminum sulfate, stay for 15 minutes for coagulation treatment; introduce into the flocculation tank, add polyethylene oxide to the coagulation tank, stay for 20 minutes for flocculation treatment, and obtain leachate Ⅰ;

[0050] (2) Denitrification treatment: introduce the leachate I into the denitrification tank, control the dissolved oxygen content of the denitrification tank to 0.5mg / L, the pH value to 7.8, the temperature to 30°C, and the number of colonies of nitrifying bacteria to be ≥10 7 CFU / mL, carry out denitrification treatment to o...

technical field

[0001] The invention relates to the technical field of environmental protection engineering, in particular to a treatment method for leachate of a garbage transfer station. Background technique

[0002] With the advancement of my country's urbanization and the continuous improvement of people's living standards, the daily amount of garbage in my country's cities has also continued to increase, and a large number of garbage transfer stations have also begun to be constructed and used. A large amount of landfill leachate is produced. The leachate of the garbage transfer station is high-concentration organic wastewater, which needs to be transferred to a qualified sewage treatment plant for treatment, but the transportation cost of the wastewater transfer process is high, and it is easy to cause secondary pollution.

[0003] At present, the leachate of the garbage transfer station generally adopts biochemical + membrane treatment. Although the treatment effect o...

Examples

Embodiment 1

[0034] The treatment method for the leachate of the garbage transfer station specifically includes the following steps:

[0035] (1) Pretreatment: Introduce the leachate from the garbage transfer station into the neutralization tank in sequence, add sodium hydroxide to the neutralization tank, and adjust the pH value to 7.0 for neutralization treatment; introduce it into the coagulation tank, and pour it into the coagulation tank Add polyaluminum chloride, stay for 12 minutes for coagulation treatment; introduce flocculation tank, add polyacrylamide or polyethylene oxide into the coagulation tank, stay for 18 minutes for flocculation treatment, and obtain leachate Ⅰ;

[0036] (2) Denitrification treatment: introduce the leachate I into the denitrification tank, control the dissolved oxygen content of the denitrification tank to 0.4mg / L, the pH value to 7.5, the temperature to 25°C, and the number of colonies of nitrifying bacteria to be ≥ 10 7 CFU / mL, carry out denitrification...

Embodiment 2

[0041] The treatment method for the leachate of the garbage transfer station specifically includes the following steps:

[0042] (1) Pretreatment: Introduce the leachate from the garbage transfer station into the neutralization tank in sequence, add sodium hydroxide to the neutralization tank, and adjust the pH value to 7.0 for neutralization treatment; introduce it into the coagulation tank, and pour it into the coagulation tank Add polyaluminum chloride, stay for 10 minutes for coagulation treatment; introduce flocculation tank, add polyacrylamide into the coagulation tank, stay for 15 minutes for flocculation treatment, and obtain leachate Ⅰ;

[0043] (2) Denitrification treatment: introduce the leachate Ⅰ into the denitrification tank, control the dissolved oxygen content of the denitrification tank to 0.3mg / L, the pH value to 7.2, the temperature to 20°C, and the number of colonies of nitrifying bacteria to be ≥10 7 CFU / mL, carry out denitrification treatment to obtain le...

Embodiment 3

[0048]The treatment method for the leachate of the garbage transfer station specifically includes the following steps:

[0049] (1) Pretreatment: Introduce the leachate from the garbage transfer station into the neutralization tank in sequence, add potassium hydroxide to the neutralization tank, adjust the pH value to 8.0 for neutralization treatment; introduce it into the coagulation tank, and pour it into the coagulation tank Add polyaluminum sulfate, stay for 15 minutes for coagulation treatment; introduce into the flocculation tank, add polyethylene oxide to the coagulation tank, stay for 20 minutes for flocculation treatment, and obtain leachate Ⅰ;

[0050] (2) Denitrification treatment: introduce the leachate I into the denitrification tank, control the dissolved oxygen content of the denitrification tank to 0.5mg / L, the pH value to 7.8, the temperature to 30°C, and the number of colonies of nitrifying bacteria to be ≥10 7 CFU / mL, carry out denitrification treatment to o...