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Method for lowering ammonia load in leachate treatment biochemical system

A biochemical system and leachate technology, applied in the field of reducing ammonia load in the biochemical system for treating leachate, can solve the problems of reducing operating costs, insufficient carbon source, nitrifying liquid reflux ratio and large pool capacity, etc., to improve reliability, reduce Fouling and clogging risk, reduced fouling and clogging effect

Active Publication Date: 2019-04-16
WELLE ENVIRONMENTAL GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of this invention is to provide a method for reducing the ammonia load in the leachate biochemical system, which can solve the problems of high ammonia nitrogen leachate in the MBR biochemical treatment process, such as high ammonia load, insufficient carbon source, nitrifying liquid reflux ratio and pool For problems with large capacity, the method of degassing membrane deamination is supplemented for deamination, so as to reduce operating costs and stabilize the decarburization and denitrification of the MBR biochemical system.

Method used

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  • Method for lowering ammonia load in leachate treatment biochemical system

Examples

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Embodiment 1

[0041] High ammonia nitrogen wastewater in a denitrification tank 1, the temperature is 36.5°C, the COD concentration is 6200mg / L, the ammonia nitrogen concentration is 3051mg / L, the total nitrogen is 3410mg / L, the total hardness is 3210mg / L, the pH is 8.4, the silica concentration It is 76mg / L, and SS is 13g / L. According to the method for reducing the ammonia load in the leachate biochemical system of the present invention, the treatment is carried out.

[0042] ⑴, ultrafiltration treatment.

[0043] The leachate in the denitrification tank 1 is pumped into the ultrafiltration module 3 through the raw water for ultrafiltration treatment. The filter membrane of the membrane module has a pore size of 20nm and intercepts particulate matter with a particle size greater than 20nm. The working pressure in the tube is 0.58Mpa, and the reflux ratio 13:1, the raw water is separated from mud and water, and the ultrafiltrate is sent to the ultrafiltration storage tank 4, and the ultraf...

Embodiment 2

[0052] High ammonia nitrogen wastewater in a denitrification tank 1, the temperature is 36.9°C, the COD concentration is 5130mg / L, the ammonia nitrogen concentration is 2658mg / L, the total nitrogen is 2990mg / L, the total hardness is 2010mg / L, the pH is 8.9, the silica concentration It is 74mg / L, and SS is 13.6g / L. According to the method for reducing the ammonia load in the leachate biochemical system of the present invention, the treatment is carried out.

[0053] ⑴, ultrafiltration treatment.

[0054] The leachate in the denitrification tank 1 is pumped into the ultrafiltration module 3 through the raw water for ultrafiltration treatment. The filter membrane of the membrane module has a pore size of 15nm, and the particulate matter with a particle size greater than 15nm is retained. The working pressure in the tube is 0.5Mpa. The ratio is 13:1, the raw water is separated from mud and water, and the sludge and suspended matter are intercepted. The ultrafiltrate is sent to th...

Embodiment 3

[0063] High ammonia nitrogen wastewater in a denitrification tank 1, the temperature is 38.6°C, the COD concentration is 4860mg / L, the ammonia nitrogen concentration is 2240mg / L, the total nitrogen is 2818mg / L, the total hardness is 2600mg / L, the pH is 8.8, the silica concentration It is 68mg / L, and SS is 12.9g / L. According to the method for reducing the ammonia load in the leachate biochemical system of the present invention, the treatment is carried out.

[0064] ⑴, ultrafiltration treatment.

[0065] The leachate in the denitrification tank 1 is pumped into the ultrafiltration module 3 through the raw water for ultrafiltration treatment. The membrane module filter membrane pore size intercepts particulate matter with a particle size greater than 20nm, the working pressure in the tube is 0.6Mpa, and the reflux ratio is 13: 1. Separating the raw water from mud and water, intercepting sludge and suspended matter, sending the ultrafiltrate to the ultrafiltration storage tank 4...

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Abstract

The invention relates to a method for lowering an ammonia load in a leachate treatment biochemical system. The method comprises the steps that 1, raw water containing high ammonia nitrogen is pumped into an ultrafiltration component to be subjected to ultrafiltration treatment, and ultrafiltration liquid is sent to an acid-base regulating tank; 2, base is added into the acid-base regulating tank,stirring is conducted, and water quality regulation treatment is conducted; 3, clear liquid obtained after water quality regulation treatment is conducted is subjected to impurity removal treatment bymeans of a sand filter through fine filtration; 4, microfiltration liquid is sent into a heat exchanger for heat exchange, after heating is conducted, the microfiltration liquid is conveyed into a multistage ammonia removal membrane component for ammonia removal treatment, and waste water obtained after degassing is sent into an MBR membrane bioreactor for biochemical treatment. Accordingly, theproblem that high ammonia nitrogen leachate is high in ammonia load, insufficient in carbon source and large in nitrification liquid reflux ratio and tank volume in the MBR biochemical treatment process can be solved, ammonia removal is assisted through a degassing membrane ammonia removal method, the running cost is lowered, and MBR biochemical system decarburization and denitrification can run stably.

Description

technical field [0001] The invention relates to a method for reducing ammonia load in a leachate biochemical system, and belongs to the technical field of leachate treatment. Background technique [0002] Landfill leachate is a kind of high-concentration organic wastewater with high ammonia nitrogen content and complex composition, which is difficult to treat. The mainstream treatment process of the existing landfill leachate adopts the external MBR biochemical denitrification process, see figure 1 As shown, it is mainly two-stage nitrification and denitrification + UF + NF / RO treatment. The ammonia nitrogen is first oxidized to nitrate nitrogen (NDN) by nitrifying bacteria, and then reduced and denitrified to nitrogen by denitrifying bacteria to achieve deammonization. For the purpose, the effluent can control ammonia nitrogen and TN within the standards listed in Table 2 of GB16889-2008 Pollutant Control Standards for Domestic Waste Landfill Sites. [0003] For the initi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/16C02F103/06
CPCC02F1/001C02F1/02C02F1/20C02F1/441C02F1/444C02F1/5236C02F1/66C02F3/302C02F5/02C02F9/00C02F2101/16C02F2103/06
Inventor 宗韬杨虎君韩颖浦燕新李月中朱卫兵于茵
Owner WELLE ENVIRONMENTAL GRP CO LTD
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