CN101307578B

CN101307578B - Detection method of paper making sludge deodorization effect

Info

Publication number: CN101307578B
Application number: CN 200810115914
Authority: CN
Inventors: 刘贤淼; 江泽慧; 王春鹏; 任海青; 傅峰
Original assignee: Research Institute of Wood Industry of Chinese Academy of Forestry
Current assignee: Research Institute of Wood Industry of Chinese Academy of Forestry
Priority date: 2008-06-30
Filing date: 2008-06-30
Publication date: 2011-06-29
Anticipated expiration: 2028-06-30
Also published as: CN101307578A

Abstract

The invention discloses a method for detecting deodorizing effect of paper-making sludge. The concrete steps of the method are as follows: deodorizing wet sludge is added with an H2O2 or NaClO treatment solution with a concentration in mass percentage of between 0.10 to 1.00 percent, and the concentration of the NaClO treatment solution is the effective chlorine concentration; the mixing ratio of the wet sludge tothe treatment solution is 0.5g/ml, and after the wet sludge and the treatment solution are mixed with even stirring and the wet sludge is immersed in the treatment solution for 10 to 12 hours. The method of the invention has the advantages of higher removal rate and reliability of deodorizing the paper-making sludge, treating odors with large air flow and high concentration, removing mixed odorsby the multi-stage sharing washing, along with small floor areas, low investment and simple and convenient operation.

Description

A kind of detection method of paper making sludge deodorization effect

Technical field

The present invention relates to a kind of method of deodorizing, particularly a kind of detection method of paper making sludge deodorization effect.

Background technology

All stimulate olfactory organ to cause that the smell of unhappy sensation of people and infringement living environment is referred to as stench, and the material with foul odour is called as odorant pollutant.Stench is a kind of form of atmosphere pollution, because its particularity, a lot of countries treat it as single-row public hazards.Stench has become a kind of in seven kinds of typical public hazards in the world today (atmosphere pollution, water pollution, soil pollution, noise pollution, vibration, land subsidence, stench).Up to now, have about more than 200 ten thousand kinds of compounds on the earth, wherein about 1/5 has various smells, and the material with foul odour has nearly 10000 kinds approximately, the odorant that can feel with people's sense of smell has kind more than 4000, wherein has tens kinds of harm to the people bigger.These odorants, except minority inorganic compounds such as ammonia, hydrogen sulfide, the overwhelming majority is an organic matter.Except organic carbon that must have (C) and most hydrogen (H) that has, sulphur (S), nitrogen (N), oxygen (0) and chlorine (Cl) are components common in the odorant in organic odorant.Organic odorant often contain hydroxyl (OH), carbonyl (=CO), carboxyl (COOH), amino (NH ₂), (SH) etc. functional group forms compounds such as phenol, alcohol, aldehyde, ketone, mercaptan, thioether to sulfydryl.The foul smell of paper mill sludge is mainly from two aspects, and the first kind is all kinds of solvents, the petroleum derivative that uses in the paper-making process; Second class is new formation owing to the biochemical reaction of microorganism.The paper mill sludge foul smell comprises various sulfide and NO such as hydrogen sulfide, mercaptan _XGas.

At present, the method for control stench mainly contains: active carbon adsorption, chemical absorption method, ozone oxidation method, biofiltration process, soil deodorization process etc.

Wherein active carbon adsorption is to be raw material with the active carbon, the deodorizing mode of utilizing the adsorption function of active carbon that foul smell is handled.But this method is limited to effects such as hydrogen sulfide or ammonias, can not be used for the situation of atm number high concentration, and active carbon regeneration and replacement cost are big, and labour intensity is big, and regeneration back active carbon effect descends.

The chemical deodorizing method is to utilize chemical mediator (NaOH, NaCl or NaClO) to cause smelly composition with mineral-type such as hydrogen sulfide, ammonias to react, thereby reaches the purpose of deodorizing.Chemical deodorizing method anti impulsion load is strong, but discontinuous operation, flexible working mode, chemical method is more thorough to the absorptance of hydrogen sulfide, ammonia etc., and reaction speed is fast; But there is certain difficulty in the removal to the part volatile organic compounds.

The ozone oxidation method is to utilize strong oxidizer ozone, relevant odorant can be oxidized to odorless or low sordes matter.Suitable and when mixing rapidly in condition with pending gas, the reaction speed of ozone and hydrogen sulfide is exceedingly fast, and only needs a second, but also has suitable researcher to think, hydrogen sulfide is also not exclusively caused by ozone, under many circumstances, ozone just plays the effect of smoke agent for shielding, has a lot of ozone equipments to be abandoned in the U.S., its reason is the ozone generating-device unstable properties, ozone itself is a kind of pollution, can corroding metal, and subsequent treatment expense height.The purification efficiency of ozone not high (all the more so to organic odor pollutant) is difficult to follow the tracks of the dosage that adds of controlling ozone.

The biofiltration process processing procedure is to be adsorbed and absorbed foul smell in the stench air-flow by natural filtering material, comes oxidative degradation by bacterium and other microorganism of being grown in the filtrate then.Generally, own intrinsic bacterium and other microorganism just is enough to be used for removing foul smell on these natural filtering materials.But this method floor space is big; Big to temperature, pH value, humidity requirement; The surface loading conference produces stops up; Need provide different floras to mixed foul smell.

The mechanism of soil deodorization process mainly can be divided into physical absorption and biodegradation two classes.But this class methods floor space is big, is not suitable for many heavy rains and avenges more, must carry out preliminary treatment to hot and humid gas.

In sum, more than except the soil deodorization process, other the whole bag of tricks are mainly used in the deodorizing to gaseous state or liquid substance, also do not remove at present the deodorizing method of the mud stench of liquid-solid mixed state effectively.

Summary of the invention

In order to overcome the problems referred to above, remove the paper mill sludge stench of liquid-solid mixed state effectively, the present invention proposes a kind of detection method of paper making sludge deodorization effect, and concrete steps are, add H in will be by the wet mud of deodorizing ₂O ₂Or the NaClO Treatment Solution, the mass percent concentration scope of this Treatment Solution is 0.10%～1.00%, the concentration of NaClO Treatment Solution is effective chlorine density; The mixed proportion of wet mud and Treatment Solution is 0.5g/ml, after wet mud and Treatment Solution are mixed, stirs, and floods more than 10 hours.

Further, the mass percent concentration of Treatment Solution of the present invention can be in 0.01%, 0.05%, 0.10%, 0.50%, 1.00% any one.

Further, described dip time is 10-12 hour.

This method has the clearance and the reliability of higher paper mill sludge stench, can handle the high foul smell of large-minded concentration; Can remove various mixed stenches by multi-cascade with washing; Floor space is few, invests little, easy and simple to handle.

Description of drawings

Fig. 1 is the checkout gear figure of test through deodorizing method deodorizing effect of the present invention;

Fig. 2 (a) adds H ₂O ₂The ammonia burst size test result curve map of the wet mud of Treatment Solution and comparison other;

Fig. 2 (b) adds the wet mud of NaClO Treatment Solution and the ammonia burst size test result curve map of comparison other;

Fig. 3 (a) is for adding H ₂O ₂The hydrogen sulfide burst size curve map of the wet mud of Treatment Solution;

Fig. 3 (b) is the hydrogen sulfide burst size curve map of the wet mud of adding NaClO Treatment Solution;

Fig. 3 (c) adds the hydrogen sulfide burst size curve map that the aqueous solution is handled for comparison other for doing wet mud.

The specific embodiment

Specifically describe the embodiment of deodorizing method of the present invention below.At first the wet mud of wanting deodorizing is added Treatment Solution and handle, promptly in wet mud, add H ₂O ₂Or the NaClO Treatment Solution, the mass percent concentration of this Treatment Solution can be chosen between 0.10%～1.00%, and the concentration of NaClO Treatment Solution is effective chlorine density; Adopt following 5 kinds of concentration in the present embodiment respectively: 0.01%, 0.05%, 0.10%, 0.50%, 1.00%; The ratio of wet mud and Treatment Solution is 0.5g/ml, chooses the H that the wet mud of 10g adds 20ml in the present embodiment ₂O ₂Or the NaClO Treatment Solution, after wet mud and Treatment Solution are mixed, stir, and the dipping regular hour, as 10-12 hour, the stench in the wet mud was just removed effectively.For the effect with deodorizing method of the present invention compares, selected two kinds of samples object as a comparison, a kind of mixture for wet mud of 10g and 20ml water, another kind are to add 20ml water again after the wet mud oven dry of 10g.Table 1 and table 2 have been listed the H that adds variable concentrations in above-mentioned two kinds of comparison others and the wet mud respectively ₂O ₂Or after the NaClO Treatment Solution, the test result of deodorizing.

With reference to figure 1, adopt device as shown in Figure 1 that the effect and the comparison other that utilize deodorizing method of the present invention are tested.

At first will be mixed with being placed in three mouthfuls of beakers 1 of Treatment Solution by hygrometric mud or comparison other, this beaker places magnetic force heating stirrer container 2, the temperature of water-bath is controlled at 60-70 ℃ in the container 2, in test process, agitator stirs the water in the container with the speed of 150r/min, with even heating there-necked flask; Nitrogen in the nitrogen cylinder 3 is under gas flowmeter 4 is communicated to measured object liquid level in the there-necked flask; Another outlet at there-necked flask is connected with bubble absorption tube 5, and the absorption liquid of 6ml is arranged in this pipe, absorbs the gas that discharges from measured object.It is seal cavity that nitrogen cylinder, there-necked flask and bubble absorption tube are communicated with.Wherein absorption liquid is according to the used absorption liquid of national standard test gas burst size.

During detection, open the source of the gas of nitrogen cylinder 3, be blown into nitrogen 10 hours, open magnetic stirring apparatus simultaneously, surveyed a burst size, surveyed altogether 10 hours in per 2 hours with the 200ml/min flow velocity.After sample collection after absorption liquid absorbs gas is finished, absorption liquid is transferred in the 10ml color-comparison tube, develops the color, measure absorbance by the step of producing calibration curve.

By the detection to ammonia burst size and hydrogen sulfide burst size, the effect of testing deodorizing method of the present invention.The ammonia burst size detects main reference standard GB/T 14,679 one 93 " mensuration clorox-salicylic acid AASs of air quality ammonia ", hydrogen sulfide burst size test main reference standard GB 11742-89 " hydrogen sulfide health test method methylenum careuleum AAS in the atmosphere of residential area ".

Table 1 has been listed the H that utilizes variable concentrations ₂O ₂Or the NaClO Treatment Solution is handled the back has reached comparison other to the ammonia burst size ammonia burst size; Fig. 2 (a) is H ₂O ₂Under the solution-treated and the ammonia burst size curve map of comparison other, Fig. 2 (b) adds the wet mud of NaClO Treatment Solution and the ammonia burst size test result curve map of comparison other; Table 2 has been listed the H that utilizes variable concentrations ₂O ₂Or the hydrogen sulfide burst size of NaClO Treatment Solution after handling reached the ammonia burst size of comparison other, and Fig. 3 (a) is for adding H ₂O ₂The hydrogen sulfide burst size curve map of the wet mud of Treatment Solution; Fig. 3 (b) is the hydrogen sulfide burst size curve map of the wet mud of adding NaClO Treatment Solution; Fig. 3 (c) adds the hydrogen sulfide burst size curve map that the aqueous solution is handled for comparison other for doing wet mud.Test in wherein per two hours once is numbered NO.1～NO.5, surveys altogether 10 hours; Summation is represented 10 hours test total amounts.

Table 1

Table 2

Data from above table 1 and table 2, and the curve map shown in Fig. 2-3, can see, after 10 hours, the foul smell burst size is very little, illustrate that stench such as most ammonia and hydrogen sulfide is removed effectively in the paper mill sludge, in actual deodorisation process, time, long more certain effect was good more, but the time has been grown cost and efficient reduction, and make that can utilize in the mud composition to decompose reduces, therefore best deodorizing dip time is 10-12 hour, and at this moment, Treatment Solution and mud substantially can complete reactions.

Claims

1. the detection method of a paper making sludge deodorization effect is characterized in that, the wet mud of deodorizing is added Treatment Solution handle, and promptly adds H in wet mud ₂O ₂Or the NaClO Treatment Solution, the mass percent concentration of this Treatment Solution adopts following 5 kinds of concentration respectively: 0.01%, 0.05%, 0.10%, 0.50%, 1.00%, and the concentration of NaClO Treatment Solution is effective chlorine density; The ratio of wet mud and Treatment Solution is 0.5g/ml, promptly chooses the H that the wet mud of 10g adds 20ml ₂O ₂Or the NaClO Treatment Solution, after wet mud and Treatment Solution are mixed, stirring, and flooded 10-12 hour, the stench in the wet mud is just removed effectively; To be mixed with being placed on by hygrometric mud in three mouthfuls of beakers of Treatment Solution then, this beaker places magnetic force heating stirrer container, the temperature of water-bath is controlled at 60-70 ℃ in the container, in test process, agitator stirs the water in the container with the speed of 150r/min, with even heating there-necked flask; Nitrogen in the nitrogen cylinder is under gas flowmeter is communicated to measured object liquid level in the there-necked flask; Another outlet at there-necked flask is connected with the bubble absorption tube, in this bubble absorption tube the 6ml absorption liquid is arranged, to absorb the gas that discharges from measured object; It is seal cavity that nitrogen cylinder, there-necked flask and bubble absorption tube are communicated with, wherein absorption liquid is according to the used absorption liquid of national standard test gas burst size, during detection, open the source of the gas of nitrogen cylinder, be blown into nitrogen 10 hours with the 200ml/min flow velocity, open magnetic stirring apparatus simultaneously, surveyed a burst size, surveyed altogether 10 hours in per 2 hours; After sample collection after absorption liquid absorbs gas is finished, absorption liquid is transferred in the 10ml color-comparison tube, develops the color, measure absorbance by the step of producing calibration curve; By detection to ammonia burst size and hydrogen sulfide burst size, test the effect of this deodorizing method, the ammonia burst size detects main reference standard GB/T 14679-93 " the mensuration clorox-salicylic acid AAS of air quality ammonia ", hydrogen sulfide burst size test main reference standard GB 11742-89 " hydrogen sulfide health test method methylenum careuleum AAS in the atmosphere of residential area ".