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DTRO discharged garbage permeation accumulation liquid advanced treatment method

A technology for advanced treatment and landfill leachate, applied in the direction of contaminated groundwater/leachate treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the complex composition of leachate, the decline of biodegradability, and the restriction of biochemical processes, etc. problem, to achieve the effect of reducing CODCr and ammonia nitrogen, improving biodegradability, and denitrification effect

Pending Publication Date: 2021-10-26
BEIJING JINGONG SEAWATER SCI & TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing garbage permeate adopts biochemical + DTRO membrane process, and 25-40% of the concentrated liquid must be discharged. Since the landfill cannot be further disposed of, the salt concentration is increasing, which seriously restricts the biochemical process; especially a small amount of heavy metal ions, calcium Magnesium ions inhibit the biochemical process; moreover, the components in the leachate become more and more complex, the components that are difficult to degrade increase, and the biodegradability decreases. The characterization indicators: the ammonia nitrogen content rises, C / N<3 appears, and the ammonia nitrogen is in the concentrated liquid water Exist in the state of organic ions; in addition, there are colloids that remain dispersed and suspended in water for a long time

Method used

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  • DTRO discharged garbage permeation accumulation liquid advanced treatment method
  • DTRO discharged garbage permeation accumulation liquid advanced treatment method
  • DTRO discharged garbage permeation accumulation liquid advanced treatment method

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Take the leachate from a composting plant, the water quality is CODCr25000~28000mg / l, ammonia nitrogen 1000~1200mg / l;

[0031] Add the leachate into the three-dimensional catalytic reactor (TCR), and after 2 hours of treatment, the concentrations of CODCr and ammonia nitrogen in the effluent are 1500-1800 mg / l and 300-350 mg / l, respectively;

[0032] The effluent from the three-dimensional catalytic reactor enters the anoxic / aerobic SBR reaction tank for biochemical treatment, relying on aerobic microorganisms in the reaction tank to degrade organic matter, and relying on aerobic nitrifying bacteria and anaerobic denitrifying bacteria to convert ammonia nitrogen into nitrogen. The operation cycle is 20 hours, divided into water intake for 1 hour, initial aeration for 6 hours, static stirring for 4 hours, secondary aeration for 6 hours, and sedimentation and drainage for 3 hours. The sludge load in the reactor is controlled at 0.3-0.8kg / (kg*d), the dissolved oxygen in th...

Embodiment 2

[0039] Take the leachate from an urban waste landfill that has been in operation for 5 years. The water quality is CODCr 15000-25000mg / l, ammonia nitrogen 1000-1200mg / l, and pH 6-8;

[0040] Put the leachate into the three-dimensional catalytic reactor and treat it for 2 hours. The concentrations of CODCr and ammonia nitrogen in the effluent are 1000-1700mg / l and 250-300mg / l respectively;

[0041] The effluent from the three-dimensional catalytic reactor enters the anoxic / aerobic SBR reaction tank for biodegradation of organic matter and nitrification and denitrification biological denitrification treatment. The operation cycle is 20 hours, divided into water intake for 2 hours, initial aeration for 6 hours, and static stirring for 5 hours. Then aerate for 4 hours, sedimentation and drainage for 3 hours, the sludge load in the reactor is controlled at 0.3-0.8kg / (kg*d), the dissolved oxygen in the water during the aeration stage is controlled at 0.5-4mg / l, after SBR biochemical ...

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Abstract

The invention relates to the technical field of industrial wastewater treatment, and discloses a DTRO discharged garbage permeation accumulation liquid advanced treatment method, which comprises the following steps of adding garbage leachate into a three-dimensional catalytic reactor, decomposing organic matters through an electrolytic method, and simultaneously removing part of NH3-N (amino nitrogen), and realizing the enhanced effect of the biochemical treatment process by carrying out electrolytic pretreatment-biochemical treatment forced internal circulation with the anoxic / aerobic SBR reaction tank. The treatment method disclosed by the invention has a relatively good improvement effect, has practical significance and is suitable for treating the leachate at each stage of the refuse landfill, such as a concentrated solution, an old solution, leachate and the like of the refuse landfill, and the effluent quality is stable and reaches the primary standard in Integrated Wastewater Discharge Standard (GB8978-1996); and the process provided by the invention can be realized only by adding pre-pretreatment to the treatment process of the original refuse landfill, and has obvious economic benefits, environmental benefits and social benefits.

Description

technical field [0001] The invention relates to the technical field of waste water treatment, in particular to a method for advanced treatment of DTRO discharged rubbish seepage accumulation liquid (old liquid). Background technique [0002] The concentrated waste liquid discharged from the original operation of the DTRO device in the landfill and the waste-to-energy plant, or the mixture of the concentrated liquid and the original liquid (called old liquid) accumulated for many years is up to the standard. [0003] The existing garbage permeate adopts biochemical + DTRO membrane process, and 25-40% of the concentrated liquid must be discharged. Since the landfill cannot be further disposed of, the salt concentration is increasing, which seriously restricts the biochemical process; especially a small amount of heavy metal ions, calcium Magnesium ions inhibit the biochemical process; moreover, the components in the leachate become more and more complex, the components that ar...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/461C02F1/72C02F101/30C02F103/06
CPCC02F9/00C02F1/4672C02F1/46104C02F1/66C02F1/50C02F2101/30C02F2305/023C02F3/302C02F2103/06C02F3/305
Inventor 杨昆高修强杨圣洁
Owner BEIJING JINGONG SEAWATER SCI & TECH CO LTD
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