CN105712595B - A kind of system of advanced treating sludge - Google Patents

A kind of system of advanced treating sludge Download PDF

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Publication number
CN105712595B
CN105712595B CN201510992655.6A CN201510992655A CN105712595B CN 105712595 B CN105712595 B CN 105712595B CN 201510992655 A CN201510992655 A CN 201510992655A CN 105712595 B CN105712595 B CN 105712595B
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China
Prior art keywords
sludge
arc chamber
cold plasma
ozone
voltage
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CN201510992655.6A
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Chinese (zh)
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CN105712595A (en
Inventor
钟贤炬
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Luzhou Juyuan Electric Power Equipment Co Ltd
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Luzhou Juyuan Electric Power Equipment Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/004—Sludge detoxification
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/006—Electrochemical treatment, e.g. electro-oxidation or electro-osmosis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/06—Treatment of sludge; Devices therefor by oxidation
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F7/00—Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/06—Sludge reduction, e.g. by lysis
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses

Abstract

The invention discloses a kind of systems of advanced treating sludge, ozone cold plasma generator is arranged in sludge arc chamber, and PH soda acid adjusting apparatus is electrically connected in controller, the sludge arc chamber and the ozone cold plasma generator, colloidal sludge is put into the PH soda acids adjusting apparatus and carries out separation of solid and liquid, the sludge solids isolated are sent into the sludge arc chamber, then the voltage in the sludge arc chamber is arranged to predeterminated voltage, ozone and cold plasma are inputted into the sludge arc chamber by the ozone cold plasma generator, discharge treatment is carried out by the ozone cold plasma generator, so as to be passivated the heavy metal to dissociate in the sludge.The system of advanced treating sludge provided by the invention can effectively improve the resource utilization of sludge so that the minimizing of sludge is also improved.

Description

A kind of system of advanced treating sludge
Technical field
The present invention relates to technical field of sludge treatment more particularly to a kind of systems of advanced treating sludge.
Background technology
Sludge is the intermediate product that sewage treatment plant (mainly secondary settling tank) carries over, and moisture content is very high in sludge, Middle high-content organic matter it is parasitic various bacteriums, virus and parasite.Meanwhile zinc, copper, mercury are also concentrated in sludge, chromium, The heavy metal compounds such as nickel, arsenic, lead, cadmium and toxic compounds, agrochemical.The property complicated and changeable of sludge structure determines pair It is efficiently treated through that there are certain difficulty.The secondary pollution of large area soil is will result in if huddling and throwing out without care, unlikely It is agricultural.
In the prior art, the processes such as concentration, baked wheaten cake, desiccation dehydration Treatment of Sludge are usually used, after then handling Sludge transport landfill yard and filled so that the resource utilization of sludge is extremely low.
The content of the invention
The present invention provides a kind of system of advanced treating sludge, the resource utilization of sludge can be effectively improved so that The minimizing of sludge is also improved.
An embodiment of the present invention provides a kind of systems of advanced treating sludge, discharge including PH soda acids adjusting apparatus, sludge Room, ozone cold plasma generator and controller, the ozone cold plasma generator are arranged on the sludge arc chamber In, and the controller be electrically connected the PH soda acids adjusting apparatus, the sludge arc chamber and described ozone cold etc. from Sub- generating means, wherein：
Colloidal sludge is put into the PH soda acids adjusting apparatus and carries out separation of solid and liquid, the sludge solids isolated are sent Enter the sludge arc chamber, the voltage in the sludge arc chamber is then arranged to predeterminated voltage, passes through described ozone cold etc. Ion generating device inputs ozone and cold plasma into the sludge arc chamber, is then sent out by the ozone cold plasma Generating apparatus carries out discharge treatment, so as to be passivated the heavy metal to dissociate in the sludge.
Optionally, the system also includes：
Preliminary filling chinaware, it is dirty to the colloidal for before colloidal sludge is put into the PH soda acids adjusting apparatus Mud carries out processing of magnetizing.
Optionally, the PH soda acids adjusting apparatus includes electrolytic cell, toroidal winding, positive electrode plate, negative electrode plate, membrane And solenoid valve, wherein, the electrolytic cell is arranged in the toroidal winding, the positive electricity step, the negative electrode plate and institute It states membrane to be arranged in the electrolytic cell, and the membrane is arranged between the positive electricity step and the negative plate, the electricity Magnet valve is arranged on the electrolytic cell, and the colloidal sludge that will magnetize that treated passes through the solenoid valve and is sent into the electrolysis Chi Zhong.
Optionally, magnetic spheres are additionally provided in the electrolytic cell, for continuing to magnetize to the colloidal sludge Processing.
Optionally, the ozone cold plasma producing apparatus includes discharge component, in the ozone cold plasma Generating means is inputted into the sludge arc chamber after ozone and cold plasma, carries out discharge treatment.
Optionally, the discharge component includes high-tension transformer, high-voltage rectifier, high-voltage capacitor and igniter, wherein, The input terminal of the high-tension transformer is connected with access power supply, the output terminal of the high-tension transformer and the high-voltage rectifier Input terminal is connected, and the output terminal of the high-voltage rectifier is connected respectively with the high-voltage capacitor and the igniter, and described High-voltage capacitor and the igniter are arranged in the sludge arc chamber.
Optionally, the system also includes：
Thyristor is arranged between the high-tension transformer and the access power supply, and the thyristor and the control Device is connected.
Optionally, the sludge arc chamber is using made of fiberglass.
Optionally, the sludge arc chamber is divided into three sections of rooms, and to each section of arc chamber pressure in three sections of rooms not Same voltage.
Optionally, the PH soda acids adjusting apparatus further includes：
Motor is connected with the positive plate.
Optionally, the PH soda acids adjusting apparatus further includes：
Scraper, with the positive plate clearance fit.
By one embodiment or multiple embodiments, the invention has the advantages that advantage：
Due to the system of the advanced treating sludge in the embodiment of the present application, colloidal sludge is put into the adjustment of PH soda acids first Separation of solid and liquid is carried out in device, the sludge solids isolated then are sent into sludge arc chamber, then by the sludge arc chamber In voltage be arranged to predeterminated voltage, ozone and cold is inputted into the sludge arc chamber by ozone cold plasma generator Then plasma carries out discharge treatment by the ozone cold plasma generator, in this way, can not only kill various thin Bacterium, virus and parasite, and organic fertilizer not soluble in water can be made to be converted into the water-soluble organic fertilizer that can be absorbed by plants, together When can be in various degree passivation sludge in dissociate heavy metal, thus sludge is made to make a silk purse out of a sow's ear, becomes free of contamination organic fertilizer, So as to effectively improve the resource utilization of sludge so that the minimizing of sludge is also improved.
Description of the drawings
Fig. 1 is the Organization Chart of the system of advanced treating sludge in the embodiment of the present invention；
Fig. 2 is the structure chart of PH soda acid adjusting apparatus in the embodiment of the present invention；
Fig. 3 is the structure chart of sludge arc chamber in the embodiment of the present invention；
Fig. 4 is the structure chart of ozone cold plasma generator in the embodiment of the present invention.
Related mark is as follows in attached drawing：
1 --- PH soda acid adjusting apparatus, 10 --- electrolytic cell, 11 --- toroidal winding, 12 --- positive electrode plate, 120 --- polylith circular graphitic plate, 121 --- aluminium sheet, 13 --- negative electrode plate, 14 --- membrane, 15 --- solenoid valve, 16 --- magnetic spheres, 17 --- scraper, 18 --- motor, 19 --- outlet valve, 2 --- sludge arc chamber, 20 --- ground connection Turntable, 21 --- motor, 22 --- ball discharge, 23 --- sampling sensor, 24 --- outlet solenoid valve, 25 --- entrance electricity Magnet valve, 3 --- ozone cold plasma generator, 30 --- high-tension transformer, 31 --- high-tension transformer, 32 --- high-voltage electricity Container group, 33 --- igniter, 34 --- ignition pill, 35 --- high-voltage meter, 4 --- controller, 5 --- preliminary filling chinaware, 6 --- access power supply, 60 --- power switch, 7 --- thyristor.
Specific embodiment
The present invention provides a kind of system of advanced treating sludge, the resource utilization of sludge can be effectively improved so that The minimizing of sludge is also improved.
In order to better understand the above technical scheme, in conjunction with appended figures and specific embodiments to upper Technical solution is stated to be described in detail.
Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, an embodiment of the present invention provides a kind of system of advanced treating sludge, including PH Soda acid adjusting apparatus 1, sludge arc chamber 2, ozone cold plasma generator 3 and controller 4, ozone cold plasma generator 3 are arranged in sludge arc chamber 2, and PH soda acids adjusting apparatus 1, sludge arc chamber 2 and ozone cold is electrically connected in controller 4 Plasma generator 3, wherein：
Colloidal sludge is put into PH soda acids adjusting apparatus 1 and carries out separation of solid and liquid, the sludge solids isolated are sent into Then voltage in sludge arc chamber 2 is arranged to predeterminated voltage by sludge arc chamber 2, pass through ozone cold plasma generator 3 Ozone and cold plasma are inputted into sludge arc chamber 2, is then carried out by ozone cold plasma generator 3 at electric discharge Reason, so as to be passivated the heavy metal to dissociate in the sludge.
Wherein, after ozone and cold plasma is inputted into sludge arc chamber 2, then sent out by ozone cold plasma Generating apparatus 3 carry out discharge treatment, so so that intense UV light, high pressure (>600MPa), ozone (O3>It is 260g/h) and high-strength Degree cold plasma multiple kinds of energy concentrates on one pending mud abrupt release into sludge arc chamber 2, not only kills various Bacterium, virus and parasite, and organic fertilizer not soluble in water can be made to be converted into the water-soluble organic fertilizer that can be absorbed by plants, The heavy metal to dissociate in passivation sludge that simultaneously can be in various degree, thus makes sludge make a silk purse out of a sow's ear.Become free of contamination organic Fertilizer is into farmland, this with being undoubtedly sludge dawn of new hopes source.
Wherein, the predeterminated voltage can be according to actual conditions come equipment, and the predeterminated voltage is usually arranged as being not less than The voltage of 30KV is, for example, 30KV, 50KV, 70KV equivalent.
Referring to Fig. 2, the system also includes preliminary filling chinaware 5, for colloidal sludge to be put into PH soda acids adjusting apparatus 1 Before, processing of magnetizing is carried out to the colloidal sludge.
Specifically, referring to Fig. 2, PH soda acids adjusting apparatus 1 includes electrolytic cell 10, toroidal winding 11, positive electrode plate 12, negative Electrode plate 13, membrane 14 and solenoid valve 15, wherein, electrolytic cell 10 is arranged in toroidal winding 11, positive electricity step 12, negative electrode Plate 13 and membrane 14 are arranged in electrolytic cell 10, and membrane 14 is arranged between positive electricity step 12 and negative plate 13, solenoid valve 15 It is arranged on electrolytic cell 10, magnetizing that treated, the colloidal sludge is sent by solenoid valve 15 in electrolytic cell 10.
Specifically, magnetic spheres 16 are additionally provided in electrolytic cell 10, for continuing to magnetize to the colloidal sludge Processing, wherein, after the colloidal sludge that magnetizes that treated is sent into electrolytic cell 10 by solenoid valve 15, when the colloidal When the magnetism of sludge is reduced or lost magnetism, by 16 magnetic spheres 16 of magnetic spheres, so that it is guaranteed that the colloidal sludge magnetic Property.
Specifically, PH soda acids adjusting apparatus 1 further includes scraper 17, and 12 clearance fit of positive plate, and it is arranged on positive plate 12 top.
Specifically, PH soda acids adjusting apparatus 1 further includes motor 18, it is connected with positive plate 12.
In actual application, positive electrode plate 12 is made of polylith circular graphitic plate 120 and aluminium sheet 121, wherein, polylith Circular graphitic plate 120 is assembled on the main shaft of the insulation of motor 18, is rotated therewith by the driving positive plate 12 of motor 18, when After colloidal sludge (essentially from being secondary settling tank) after being magnetized by preliminary filling chinaware 5 enters solenoid valve 15, flocculation-magnetic gathers compound Body tends to 12 productive set of positive electrode plate, and with the rotation of polylith circular graphitic plate 120, sludge of the productive set on graphite cake is by circular stone Scraper 17 is matched on black plate to scrape into mud groove, and the sludge scraped is then sent into the sewage that in sludge arc chamber 1 and will be isolated It is discharged from outlet valve 19.
Referring to Fig. 3, sludge arc chamber 2 is using made of fiberglass, and sludge arc chamber 2 divides for three sections of rooms, and to described Each section of arc chamber in three sections of rooms presses different voltage.
Specifically, sludge arc chamber 2 can use high strength high insulation glass steel making, and sludge arc chamber 2 divides three sections Room is handled, and three sections of rooms differ the cold plasma streamer voltage value of Treatment of Sludge, are followed successively by：30KV<50KV<70KV, installation Ground connection turntable 20 in 2 bottom of sludge arc chamber is assemblied on motor 21, is equipped at the top of 2 bottom of sludge arc chamber several to ball discharge 22, sampling sensor 23 sends every Treatment of Sludge index to controller 4, and controller 4 detects every Treatment of Sludge index When up to standard, control outlet solenoid valve 24 is opened, wherein, sludge passes through entrance electromagnetism after being handled by PH soda acids adjusting apparatus 1 Valve 25 enters in sludge arc chamber 2, wherein, the opening and closing of inlet solenoid valve 25 and outlet solenoid valve 24 are by controller 4 Control.
Referring to Fig. 4, ozone cold plasma producing apparatus 3 includes discharge component, for being filled in ozone cold plasma It puts 3 to input after ozone and cold plasma into sludge arc chamber 2, carries out discharge treatment.
Specifically, the discharge component includes high-tension transformer 30, high-voltage rectifier 31, high-voltage capacitor group 32 and igniting Device 33, wherein, the input terminal of high-tension transformer 30 is connected with access power supply 6, the output terminal and high-voltage rectifying of high-tension transformer 30 The input terminal of device 31 is connected, and the output terminal of high-voltage rectifier 31 is connected respectively with high-voltage capacitor 32 and igniter 33, and high pressure Capacitor 32 and igniter 33 are arranged in sludge arc chamber 2.
Specifically, the system also includes thyristors 7, it is arranged between high-tension transformer 30 and access power supply 6, and brilliant lock Pipe 7 is connected with controller 4, wherein, controller 4 is specifically as follows desktop computer, laptop, smart mobile phone, tablet computer Etc. equipment, can be communicated by GPRS with all parts in the system.
In actual application, power switch 60 is additionally provided between high-tension transformer 30 and access power supply 6, works as power supply After switch 60 closes a floodgate, after the boosting of high-tension transformer 30, from high-tension transformer 30 to 32 constant-current charge of high-voltage capacitor group, then by Controller 4 sends firing command to igniter 33, triggers multipair ignition pill 34 immediately, and high-voltage capacitor group 32 is made to discharge sludge Room 2 is discharged, and passes through high-voltage meter 35 and the discharge voltage numerical value of record is real-time transmitted to controller 4, and controller 4 is adjusted accordingly again Whole thyristor 7 opens angle, so as to keep discharge voltage numerical stability constant.7 via controller of thyristor, 4 current feedback and electricity Pressure feedback, which is realized, controls the constant current constant voltage of high-tension transformer 30, wherein, high-voltage meter 35 is connected with high-voltage rectifier 31.
In actual application, the colloidal sludge of sewage treatment plant's (mainly secondary settling tank sludge) will be come from, through pre- Magnetizing apparatus 5 is sent into PH soda acids adjusting apparatus 1 after magnetizing and carries out separation of solid and liquid, and the sludge solids isolated are sent into sludge arc chamber 2, sludge arc chamber 2 divides three sections of room processing, and three sections of rooms differ the ozone cold plasma streamer voltage value of Treatment of Sludge, successively For：30KV<50KV<70KV, under the coordination of controller 4, ozone cold plasma generator 3 is continuously into sludge arc chamber 2 Sludge release ozone (O3>260g/h) about after 1s, and then cold plasma streamer is discharged to sludge, and this process is with 60 times/min Repeat, discharge treatment is then carried out by ozone cold plasma generator 3, so as to be passivated the weight to dissociate in the sludge Metal.
In addition, every Treatment of Sludge index of the controller 4 according to the setting that prestores, adjust automatically ozone and cold plasma streamer Power, and determine whether sludge can discharge, and it is organic fertilizer that the sludge after discharge can be entered nontoxic heap fermentation.
In actual application, system provided by the invention can be all sewage treatment plants for being dispersed in this city various regions Treatment of Sludge data message is transmitted to data processing centre by GPRS wireless networks or RS485 communication interfaces in real time, at data Reason center analyzes the data message received and exports control instruction to delivering object in real time in real time, by data processing centre's skill Art personnel also may be used according to the timely redjustment and modification control parameter of heterogeneity of the sludge of sewage treatment plant of various regions, each sewage treatment plant Manipulation is handled on our factory's PC computers.
Cold plasma sludge treating system is as shown in table 1 below to the leading indicator after Treatment of Sludge：
Table 1
To dissociating in sludge, heavy metal passivation removal average value is specifically as shown in table 2：
Table 2
Shown in bactericidal effect table 3 specific as follows:
Sample ID Testing result
Excrement colibacillus group is several/g 100%
Worm egg mortality % 100%
Table 3
According to above-mentioned table 1 to table 3, the system of the advanced treating sludge in the embodiment of the present application, first by colloidal Sludge is put into PH soda acid adjusting apparatus and carries out separation of solid and liquid, the sludge solids isolated then is sent into sludge arc chamber, so The voltage in the sludge arc chamber is arranged to predeterminated voltage afterwards, is put by ozone cold plasma generator to the sludge Ozone and cold plasma are inputted in electric room, discharge treatment is then carried out by the ozone cold plasma generator, in this way, Various bacteriums, virus and parasite can not only be killed, and organic fertilizer not soluble in water can be made to be converted into water-soluble energy quilt The organic fertilizer of plant absorption, at the same can be in various degree passivation sludge in dissociate heavy metal, thus sludge is made to make a silk purse out of a sow's ear, Become free of contamination organic fertilizer, so as to effectively improve the resource utilization of sludge so that the minimizing of sludge is also carried It is high.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use the present invention. A variety of modifications of these embodiments will be made for those skilled in the art it will be apparent that as defined herein one As principle can in other embodiments be realized in the case where not departing from the spirit or scope of invention.Therefore, the present invention will not Meeting be limited and the embodiments shown herein, and is to fit to consistent with principles disclosed herein and novel features Most wide scope.

Claims (9)

1. a kind of system of advanced treating sludge, which is characterized in that including pH soda acids adjusting apparatus, sludge arc chamber, ozone cold Plasma generator and controller, the ozone cold plasma generator are arranged in the sludge arc chamber, and described Controller is electrically connected the pH soda acids adjusting apparatus, the sludge arc chamber and the ozone cold plasma and fills It puts, wherein：
Colloidal sludge is put into the pH soda acids adjusting apparatus and carries out separation of solid and liquid, the sludge solids isolated are sent into Then voltage in the sludge arc chamber is arranged to predeterminated voltage by the sludge arc chamber, by described ozone cold etc. from Sub- generating means inputs ozone and cold plasma into the sludge arc chamber, is then occurred by the ozone cold plasma Device carries out discharge treatment, so as to be passivated the heavy metal to dissociate in the sludge；The system also includes：Preliminary filling chinaware, is used for Before colloidal sludge is put into the pH soda acids adjusting apparatus, processing of magnetizing is carried out to the colloidal sludge；The pH Soda acid adjusting apparatus includes electrolytic cell, toroidal winding, positive electrode plate, negative electrode plate, membrane and solenoid valve, wherein, the electricity Xie Chi is arranged in the toroidal winding, and the positive electricity step, the negative electrode plate and the membrane are arranged on the electrolysis Chi Zhong, and the membrane is arranged between the positive electricity step and the negative plate, the solenoid valve is arranged on the electrolytic cell On, the colloidal sludge that will magnetize that treated passes through the solenoid valve and is sent into the electrolytic cell.
2. the system as claimed in claim 1, which is characterized in that magnetic spheres are additionally provided in the electrolytic cell, for continuing Processing of magnetizing is carried out to the colloidal sludge.
3. system as claimed in claim 2, which is characterized in that the ozone cold plasma producing apparatus includes discharge part Part, after inputting ozone and cold plasma into the sludge arc chamber in the ozone cold plasma generator, Carry out discharge treatment.
4. system as claimed in claim 3, which is characterized in that the discharge component include high-tension transformer, high-voltage rectifier, High-voltage capacitor and igniter, wherein, the input terminal of the high-tension transformer is connected with access power supply, the high-tension transformer Output terminal is connected with the input terminal of the high-voltage rectifier, the output terminal of the high-voltage rectifier respectively with the high-voltage capacitor It is connected with the igniter, and the high-voltage capacitor and the igniter are arranged in the sludge arc chamber.
5. system as claimed in claim 4, which is characterized in that the system also includes：
Thyristor is arranged between the high-tension transformer and the access power supply, and the thyristor and the controller phase Even.
6. system as claimed in claim 5, which is characterized in that the sludge arc chamber is using made of fiberglass.
7. system as claimed in claim 6, which is characterized in that the sludge arc chamber is divided into three sections of rooms, and to described three sections Each section of arc chamber in room presses different voltage.
8. system as claimed in claim 7, which is characterized in that the pH soda acids adjusting apparatus further includes：
Motor is connected with the positive plate.
9. system as claimed in claim 8, which is characterized in that the pH soda acids adjusting apparatus further includes：
Scraper, with the positive plate clearance fit.
CN201510992655.6A 2015-12-25 2015-12-25 A kind of system of advanced treating sludge Active CN105712595B (en)

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CN111170594B (en) * 2020-01-09 2021-12-07 太原工业学院 Method for digesting residual activated sludge by largely breaking walls of cold plasma
CN112010498A (en) * 2020-07-27 2020-12-01 北方工程设计研究院有限公司 Excess sludge treatment process for municipal sewage treatment plant

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