High-efficiency integrated treatment process for landfill leachate membrane concentrated solution

A landfill leachate and treatment process technology, which is applied in the field of high-efficiency integrated treatment process of landfill leachate membrane concentrate, can solve problems such as high difficulty, low economic cost, and inconspicuous removal effect, and achieve carbon source reduction and more catalytic active points , high oxidation reaction rate and high oxidation capacity

Pending Publication Date: 2022-08-05
NANJING SHENKELONG ENVIRONMENTAL PROTECTION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, compared with the above several membrane concentrate treatment technologies, advanced oxidation technology is a better method for treating membrane concentrate, and its main characteristics are: ① high efficiency, advanced oxidation technology can degrade organic matter very quickly; ② the product is harmless , the advanced oxidation method finally oxidizes organic pollutants into carbon dioxide and water, thereby achieving the purpose of completely removing COD; ③ Relatively speaking, the economic cost is low and the operability is strong. It is a physical and chemical process and is easy to control; however Many studies have shown that although the treatment of membrane concentrate by advanced oxidation method has a good removal effect on organic matter, it is necessary to ensure that the effluent of the treated membrane concentrate can stably meet the "Standards for Pollution Control of Domestic Waste Landfill Sites" (GB16889-2008) Table 2 The requirement of COD≤100mg / L is still difficult, and the requirement for NH 3 -N and TN removal effect is not obvious

Method used

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  • High-efficiency integrated treatment process for landfill leachate membrane concentrated solution
  • High-efficiency integrated treatment process for landfill leachate membrane concentrated solution
  • High-efficiency integrated treatment process for landfill leachate membrane concentrated solution

Examples

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Embodiment 1

[0025]Wastewater source: a landfill in Beijing, with a daily water treatment capacity of 2,200m³ / d. Currently, there are two sets of treatment processes: one is a 1,200-ton / day facility "regulating tank + anaerobic reactor + MBR + NF + RO"; the other The set is a 1000 ton / day skid-mounted equipment "mixing tank + biological turntable + biological aeration tank + sedimentation tank + sand filter + two-stage DTRO"; the concentrated solution of NF, RO and DTRO is produced every day, a total of 500m³ / d;

[0026] Our company adopts the combined process of biological enzyme oxidation-short-path nitrification and denitrification-heterogeneous metal chemical catalysis-free radical oxidation to treat the membrane concentrate wastewater. ) the discharge standard required in Table 2, which realizes the full quantitative treatment of the landfill leachate membrane concentrate.

[0027] technical parameter:

[0028] The processing scale of membrane concentrate is 500 tons per day. Enzyme...

Embodiment 2

[0040] Wastewater source: The treatment scale of landfill leachate in a landfill in Jiangsu is 1,000 tons per day. The treatment process mainly adopts "regulating tank + first-level anoxic biochemical tank (A) + first-level aerobic biochemical tank (O) + second-level biochemical tank Anoxic biochemical tank (A) + secondary aerobic biochemical tank (O) + MBR + NF + RO", the membrane concentrate produced by NF and RO is collected in the pool, and the water volume of the concentrate is 250 tons / day;

[0041] Our company adopts the combined process of biological enzyme oxidation-short-path nitrification and denitrification-heterogeneous metal chemical catalysis-free radical oxidation to treat the membrane concentrate wastewater. ) the discharge standard required in Table 2, thus the membrane concentrate implements the engineering scale application of the content of the present invention, and realizes the full quantification of the landfill leachate membrane concentrate.

[0042] t...

Embodiment 3

[0055] Wastewater source: The treatment scale of landfill leachate in a landfill in Guangxi is 600 tons / day. The treatment process mainly adopts "regulating tank + first-level anoxic biochemical tank (A) + first-level aerobic biochemical tank (O) + second-level Anoxic biochemical pool (A) + secondary aerobic biochemical pool (O) + MBR+NF+RO";

[0056] At present, the landfill has been closed, and the existing biochemical treatment facilities for leachate mainly deal with 300,000 tons of leachate stored in the big pit and some fresh leachate from the landfill garbage mountain, which is mainly characterized by high nitrogen content.

[0057] The leachate produced by the existing biochemical + membrane treatment facilities adopts the combined process of biological enzyme oxidation-short-path nitrification and denitrification-heterogeneous metal chemical catalysis-free radical oxidation to treat the membrane concentrate wastewater, with a designed treatment scale of 300 tons / day, a...

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Abstract

The invention discloses a high-efficiency integrated treatment process for landfill leachate membrane concentrate, which combines (1) bio-enzyme oxidation, (2) short-cut nitrification and denitrification, (3) multi-phase metal chemical catalysis and (4) free radical oxidation processes, and applies an enzyme pre-oxidation reactor, a short-cut denitrification device, a magnetoacoustic catalytic reactor and a catalytic oxidation reactor for the process provided by the invention. A vertical flow type sedimentation tank and a microwave ultrasonic reaction device are adopted for implementation; the treated effluent reaches the discharge standards required by the table 2 and the table 3 of the Pollution Control Standard for the Landfill Site of Municipal Solid Waste (GB16889-2008); the method is a full-quantitative treatment process in a real sense, and thorough degradation and removal of pollutants are realized.

Description

technical field [0001] The invention relates to the technical field of landfill leachate treatment, in particular to an efficient integrated treatment process for landfill leachate membrane concentrate. Background technique [0002] Landfill leachate is a kind of high-concentration and refractory organic wastewater, which pollutes the environment very seriously; at present, the "MBR+NF / RO" membrane technology is widely used in the treatment of landfill leachate; and the residual liquid after advanced treatment of membrane separation That is, landfill leachate membrane concentrate, generally not biodegradable, the main component is humic substances, brown-black, its COD is very high, and contains a lot of inorganic ions, including: Cl - At 10000-20000mg / L, TDS at 20000-60000mg / L, COD at 4000-6000mg / L, NH 3 -N is 100-300mg / L, and TN is 600-1000mg / L; these high-concentration and refractory concentrates limit the application and development of "MBR+NF / RO" membrane technology in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/06
CPCC02F9/00C02F2103/06C02F3/342C02F7/00C02F3/34C02F3/302C02F1/725C02F1/48C02F1/36C02F1/66C02F1/56C02F1/722C02F2001/007C02F1/302Y02W10/10
Inventor 江双双余雷陆华健田伟汉
Owner NANJING SHENKELONG ENVIRONMENTAL PROTECTION
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