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Combined type biochar enhanced nitrogen removal filler and preparation method thereof

A biochar and combined technology, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc., can solve the problems of less research on rice husk pretreatment, ammonia fiber bursting, etc., and achieve improved denitrification performance , the effect of solving pollution

Inactive Publication Date: 2014-09-17
江苏百纳环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] (3) Ammonia fiber burst
[0032] There are many pretreatment methods for lignocellulosic biomass, but there are few studies on the pretreatment of rice husks. It is of great practical significance to study new pretreatment methods to improve the bioavailability of rice husks.

Method used

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  • Combined type biochar enhanced nitrogen removal filler and preparation method thereof
  • Combined type biochar enhanced nitrogen removal filler and preparation method thereof
  • Combined type biochar enhanced nitrogen removal filler and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0062] A combined biological carbon-enhanced denitrification filler, comprising: a mesh suspension ball 1 filled with modified rice husks 2, so that the modified rice hulls occupy 60% of the inner space of the mesh suspension ball 1, and the mesh suspension The mesh aperture of the ball 1 is 2-3mm, and the modified rice husk 2 is the rice husk processed by the following treatment method, and the treatment method is:

[0063] According to the ratio of solid-liquid mass volume ratio of 1:100 g / liter, rice husks are put into water, and then H 2 o 2 Make H 2 o 2 The mass volume ratio concentration is controlled at 15-20g / L, then use HCl or H 2 SO 4 will join H 2 o 2 After the liquid pH is adjusted to 2-3, then add FeSO 4 and FeSO 4 The mass volume ratio concentration is controlled at 2-3g / L, continuously stirred with a stirrer at 100r / min, and reacted for 1.5-2h. After taking out the rice husk and washing it with water for 3 times, put it in a 60°C oven for drying to obtai...

Embodiment 2

[0066] A method for preparing a combined biochar-enhanced denitrification filler, which comprises taking rice husks and mesh suspension balls 1 with a mesh aperture of 2-3 mm, then modifying the rice husks, and then filling the modified rice husks 2 Enter the mesh suspension ball 1, and make the modified rice husk occupy 60% of the space in the mesh suspension ball 1, the following methods are adopted for the modification of the rice husk:

[0067] According to the ratio of solid-liquid mass volume ratio of 1:100 g / liter, rice husks are put into water, and then H 2 o 2 Make H 2 o 2 The mass volume ratio concentration is controlled at 15-20g / L, then use HCl or H 2 SO 4 will join H 2 o 2 After the liquid pH is adjusted to 2-3, then add FeSO 4 and FeSO 4 The mass volume ratio concentration is controlled at 2-3g / L, continuously stirred with a stirrer at 100r / min, and reacted for 1.5-2h. After taking out the rice husk and washing it with water for 3 times, put it in a 60°C ...

example

[0070] Combined biological carbon enhanced denitrification filler, where "biological carbon" refers to rice husk (after pretreatment), and "combination" means the combination of rice husk and suspended balls. The filler composed of the two can strengthen biological denitrification in sewage treatment, reduce membrane fouling in membrane bioreactors, increase water flux, and is also a resource utilization of agricultural organic solid waste (rice husk).

[0071] The core of the present invention is the pretreatment of rice husks, and the comprehensive pretreatment method adopted is: steam explosion + Fenton reagent oxidation + trace element loading, wherein both the Fenton reagent oxidation and trace element loading methods are used for the first time. Figure 4 It is the pretreatment flowchart of rice husk, and the specific method is as follows:

[0072] 1) Steam explosion

[0073]Steam explosion is a pretreatment method that uses saturated water vapor to heat raw materials, ...

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Abstract

Discloses a combined type biochar enhanced nitrogen removal filler and a preparation method thereof. The filler comprises modified rice hulls which are filled inside mesh suspended balls and filling rate is 60%. A modified method includes that the rice hulls are thrown into water in proportion of 1g / L : 100g / L, H2O2 is added to enable the water with the rice hulls to be in thickness of 15g / L to 20g / L, and HC1 or H2SO4 is used for adjusting potential of hydrogen (PH) value to 2-3. Besides, FESO4 is added to enable a solution to be in the thickness of 2g / L to 3g / L and then the solution is continuously stirred and reacts for 1.5-2 hours, and the rice hulls are fetched out to be cleaned and dried, and therefore the oxygenated rice hulls can be achieved. Next, in solid and liquid quality volume proportion of 1g / L : 100g / L, the rice hulls after being oxidized are throw into microelement mixed liquor to be soaked for 24 hours and then the solution is continuously stirred so as to enable the surfaces of the rice hulls to be absorbed with microelement. The mixed liquor comprises 1 mol / L FeSO4, 1 mol / L ZnSO4, 1 mol / L CuSO4Na2MoO4, and 1 mol / L MnSO4, and the rice hulls are fetched out to be dried so as to obtain the modified rice hulls.

Description

technical field [0001] The invention relates to a combined biological carbon enhanced denitrification filler and a preparation method thereof. Background technique [0002] In recent years, the problems of water eutrophication and water resource shortage have become increasingly serious, and the problem of water eutrophication caused by nitrogen and phosphorus pollution is the primary problem of my country's water environment. The traditional sewage treatment process has a limited ability to remove total nitrogen. A lot of research has been carried out to strengthen the denitrification by adding fillers in the reactor, and some results have been achieved. However, due to the difficulty in controlling the carbon-to-nitrogen ratio in traditional processes, artificially synthesized water-insoluble biodegradable polymers have been used, but one of the reasons hindering their popularization is the high cost. [0003] Studies have shown that agricultural organic solid waste is a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/10C02F3/34C02F3/28
CPCY02W10/10
Inventor 洪树虎洪凯傅大放张堃
Owner 江苏百纳环境工程有限公司
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