CN105776364A - Preparation method of municipal sewage treating agent - Google Patents

Preparation method of municipal sewage treating agent Download PDF

Info

Publication number
CN105776364A
CN105776364A CN201610132286.8A CN201610132286A CN105776364A CN 105776364 A CN105776364 A CN 105776364A CN 201610132286 A CN201610132286 A CN 201610132286A CN 105776364 A CN105776364 A CN 105776364A
Authority
CN
China
Prior art keywords
parts
acid
municipal wastewater
inorganic agent
adds
Prior art date
Application number
CN201610132286.8A
Other languages
Chinese (zh)
Inventor
刘平
Original Assignee
刘平
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 刘平 filed Critical 刘平
Priority to CN201610132286.8A priority Critical patent/CN105776364A/en
Publication of CN105776364A publication Critical patent/CN105776364A/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage

Abstract

The invention provides a preparation method of a municipal sewage treating agent.The method comprises the steps of firstly, picking dry straw, pulverizing the straw, adding a solution of sodium cyanoborohydride, ammonium ceric nitrate and gelatin, mixing the materials to be uniform, raising the temperature, then adding poly(ethyl acrylate), polyacrylonitrile and glutaraldehyde, raising the temperature, lowering the temperature, and conducting filtering, so that solid matter is obtained; then adding etidronic acid and polyhydric alcohol phosphate ester to water, conducting stirring, adding isothiazolinone, sepiolite, starch xanthate, magnesium sulfate heptahydrate, chitosan, N, N-dimethyl methylene diphosphonic acid, lecithin and lignin, and mixing the materials to be uniform, so that a mixture (I) is obtained; finally, adding a sodium hydroxide solution to the mixture (I) to adjust pH to 6.0-7.0, adding organic acid and the obtained solid matter, mixing the materials to be uniform, and then leaving the mixture standing still, so that the municipal sewage treating agent is obtained.By means of the municipal sewage treating agent, the chemical oxygen demand of sewage can be lowered to 63 mg/L, the biochemical oxygen demand can be lowered to 28 mg/L, suspended solids can be decreased to 35 mg/L, and total phosphorus can be decreased to 0.37 mg/L.

Description

A kind of preparation method of municipal wastewater inorganic agent

Technical field

The invention belongs to sewage-treating agent technical field, be specifically related to the preparation method of a kind of municipal wastewater inorganic agent.

Background technology

China is the country of a shortage of water resources, and water resource of per capita is only the 1/4 of the world, and the distribution of water resource Serious uneven, how to alleviate the problem such as water resources shortage and pollution and have become as an instant problem.Solve to lack Water problems, beyond source throttling, comprehensive utilization, pollution treatment has been increasingly becoming one of basic principle that China must adhere to for a long time.

Municipal wastewater in use adds and much pollutes impurity, containing more Organic substance, inorganic ion, ammonia Nitrogen, phosphate and microorganism etc., so need to consider such as microorganism excess growth, foaming, calcium phosphate scale deposition in processing procedure And the problem such as ammonia nitrogen.

At present, process municipal wastewater and mainly have the multiple methods such as physics, chemistry, biology.Physical method is i.e. divided by physics Reclaiming the undissolved suspended contaminant in sewage from effect, this mode can be divided into Gravity Separation, centrifugation etc., though method So simple, but based process can only be done, process not exclusively, have that treatment effect is the best, handling rate instability problem more.Biological Facture is that the metabolism by microorganism makes the organic pollution of dissolving, colloid and suspended state in sewage be converted into stably Harmless object, but the method equipment investment is big, and operating cost is high, and is difficult to heavy-metal ion removal, and winter is also not suitable for behaviour Make, be not suitable for promoting the use of.Therefore, use chemical method, chemical method is to process pollutant, bag with the chemical reagent thrown in more Including the reactions such as neutralization, flocculation, oxidoreduction, it is more thorough that this mode processes sewage, can reach discharge standard after process;And Sewage-treating agent is then the primary raw material of chemical treatment of sewage.

The sewage-treating agent function singleness primarily now used, it is therefore necessary to add flocculation in water treatment system respectively The various medicaments such as agent, corrosion inhibiter, antibacterial, processing technological flow is complicated, equipment is many, operating process is numerous and diverse, added amount of chemical Greatly, expense many, and between plurality of reagents can mutually be resisted by various chemical reactions, cause drug effect to reduce.

Summary of the invention

It is an object of the invention to overcome the deficiencies in the prior art to provide the preparation method of a kind of municipal wastewater inorganic agent, institute Obtain municipal wastewater inorganic agent and substantially reduce the COD of sewage, Biochemical oxygen demand, float and total phosphorus.

The preparation method of a kind of municipal wastewater inorganic agent, comprises the following steps:

Step 1, in parts by weight, takes dry straw 50~100 parts, pulverizes, add sodium cyanoborohydride 5~12 parts, cerous nitrate Ammonium 6~9 parts and gelatin solution 100~150 parts, mix homogeneously, it is warming up to 40~50 DEG C, is incubated 1~2 hour, adds poly- Ethyl acrylate 4~7 parts, polyacrylonitrile 1~5 parts and glutaraldehyde 2~7 parts, be warming up to 45~55 DEG C, be incubated 2~4 hours, fall Temperature, to 5~10 DEG C, filters, obtains solids;

Step 2, in parts by weight, adds to water 50~80 parts by 1-hydroxy ethylidene-1,1-diphosphonic acid 2~8 parts, PAPE 1~6 parts In, stir 4~6 hours, add isothiazolone 2~7 parts, meerschaum 3~8 parts, starch xanthate 1~6 parts, seven water sulfur Acid magnesium 2~7 parts, chitosan 1~4 parts, N, N-dimethylated methene di 2 ethylhexyl phosphonic acid 3~6 parts, lecithin 2~5 parts, lignin 1~6 parts, Mix homogeneously, obtains mixture I;

Step 3, in parts by weight, adds sodium hydroxide solution regulation pH to 6.0~7.0 in mixture I, adds organic acid 3 ~6 parts and the solids of the 1st step gained, after mix homogeneously, stand 12~24 hours,.

Further, in step 1 by dry crushed stalk to stalk particle size 5~10cm.

Further, the mass concentration of gelatin solution described in step 1 is 0.05~0.12%.

Further, the mass concentration of sodium hydroxide solution described in step 3 is 1~3%.

Further, the one during organic acid described in step 3 is malic acid, citric acid or tartaric acid.

Further, the mixed process of step 3 is at CO2Atmosphere is carried out.

Further, step 2 can also add cinnamic aldehyde 1~7 parts.

Further, step 3 can also add poly-epoxy succinic acid 2~8 parts.

Sewage chemical oxygen demand can be down to 63 mg/L by the municipal wastewater inorganic agent of the present invention, Biochemical oxygen demand is down to 28 Mg/L, float are down to 35 mg/L, 0.37 mg/L is down to by total phosphorus.

Detailed description of the invention

Embodiment 1

The preparation method of a kind of municipal wastewater inorganic agent, comprises the following steps:

Step 1, in parts by weight, takes dry straw 50 parts, pulverizes, and adds sodium cyanoborohydride 5 parts, ammonium ceric nitrate 6 parts and bright Sol solution 100 parts, mix homogeneously, it is warming up to 40 DEG C, is incubated 2 hours, adds polyethyl acrylate 4 parts, polyacrylonitrile 1 part With glutaraldehyde 2 parts, it is warming up to 45 DEG C, is incubated 4 hours, is cooled to 5 DEG C, filters, obtain solids;

Step 2, in parts by weight, adds in 50 parts of water by 1-hydroxy ethylidene-1,1-diphosphonic acid 2 parts, PAPE 1 part, and stirring 4 is little Time, add isothiazolone 2 parts, meerschaum 3 parts, starch xanthate 1 part, Magnesium sulfate heptahydrate 2 parts, chitosan 1 part, N, N- Dimethylated methene di 2 ethylhexyl phosphonic acid 3 parts, 2 parts of lecithin, lignin 1 part, mix homogeneously, obtain mixture I;

Step 3, in parts by weight, adds sodium hydroxide solution regulation pH to 6.0 in mixture I, adds organic acid 3 parts and the The solids of 1 step gained, after mix homogeneously, stands 24 hours,.

Wherein, by dry crushed stalk to stalk particle size in 5cm, the mass concentration of institute's gelatine solution in step 1 It is 0.05%.The mass concentration of sodium hydroxide solution described in step 3 is 1%, and described organic acid is malic acid, and mixed process exists CO2Atmosphere is carried out.

Embodiment 2

The preparation method of a kind of municipal wastewater inorganic agent, comprises the following steps:

Step 1, in parts by weight, takes dry straw 65 parts, pulverizes, and adds sodium cyanoborohydride 8 parts, ammonium ceric nitrate 7 parts and bright Sol solution 125 parts, mix homogeneously, it is warming up to 45 DEG C, is incubated 1.5 hours, adds polyethyl acrylate 6 parts, polyacrylonitrile 3 Part and glutaraldehyde 5 parts, be warming up to 50 DEG C, be incubated 3 hours, be cooled to 8 DEG C, filter, obtain solids;

Step 2, in parts by weight, adds in 70 parts of water by 1-hydroxy ethylidene-1,1-diphosphonic acid 6 parts, PAPE 3 parts, and stirring 5 is little Time, add isothiazolone 6 parts, meerschaum 7 parts, starch xanthate 4 parts, Magnesium sulfate heptahydrate 6 parts, chitosan 3 parts, N, N- Dimethylated methene di 2 ethylhexyl phosphonic acid 5 parts, 4 parts of lecithin, lignin 3 parts, mix homogeneously, obtain mixture I;

Step 3, in parts by weight, adds sodium hydroxide solution regulation pH to 6.5 in mixture I, adds organic acid 4 parts and the The solids of 1 step gained, after mix homogeneously, stands 24 hours,.

Wherein, by dry crushed stalk to stalk particle size in 8cm, the mass concentration of institute's gelatine solution in step 1 It is 0.08%.The mass concentration of sodium hydroxide solution described in step 3 is 2%, and described organic acid is malic acid, and mixed process exists CO2Atmosphere is carried out.

Embodiment 3

The preparation method of a kind of municipal wastewater inorganic agent, comprises the following steps:

Step 1, in parts by weight, takes dry straw 90 parts, pulverizes, and adds sodium cyanoborohydride 5 parts, ammonium ceric nitrate 7 parts and bright Sol solution 110 parts, mix homogeneously, it is warming up to 50 DEG C, is incubated 1 hour, adds polyethyl acrylate 5 parts, polyacrylonitrile 2 parts With glutaraldehyde 3 parts, it is warming up to 45 DEG C, is incubated 4 hours, is cooled to 5 DEG C, filters, obtain solids;

Step 2, in parts by weight, adds in 65 parts of water by 1-hydroxy ethylidene-1,1-diphosphonic acid 4 parts, PAPE 3 parts, and stirring 4 is little Time, add isothiazolone 3 parts, meerschaum 6 parts, starch xanthate 3 parts, Magnesium sulfate heptahydrate 4 parts, chitosan 2 parts, N, N- Dimethylated methene di 2 ethylhexyl phosphonic acid 4 parts, 3 parts of lecithin, lignin 2 parts, mix homogeneously, obtain mixture I;

Step 3, in parts by weight, adds sodium hydroxide solution regulation pH to 7.0 in mixture I, adds organic acid 4 parts and the The solids of 1 step gained, after mix homogeneously, stands 20 hours,.

Wherein, by dry crushed stalk to stalk particle size in 10cm, the mass concentration of institute's gelatine solution in step 1 It is 0.12%.The mass concentration of sodium hydroxide solution described in step 3 is 3%, and described organic acid is malic acid, and mixed process exists CO2Atmosphere is carried out.

Embodiment 4

The preparation method of a kind of municipal wastewater inorganic agent, comprises the following steps:

Step 1, in parts by weight, takes dry straw 100 parts, pulverize, add sodium cyanoborohydride 12 parts, ammonium ceric nitrate 9 parts and Gelatin solution 150 parts, mix homogeneously, it is warming up to 50 DEG C, is incubated 1 hour, adds polyethyl acrylate 7 parts, polyacrylonitrile 5 Part and glutaraldehyde 7 parts, be warming up to 45 DEG C, be incubated 4 hours, be cooled to 10 DEG C, filter, obtain solids;

Step 2, in parts by weight, adds in 80 parts of water by 1-hydroxy ethylidene-1,1-diphosphonic acid 8 parts, PAPE 6 parts, and stirring 6 is little Time, add isothiazolone 7 parts, meerschaum 8 parts, starch xanthate 6 parts, Magnesium sulfate heptahydrate 7 parts, chitosan 4 parts, N, N- Dimethylated methene di 2 ethylhexyl phosphonic acid 6 parts, 5 parts of lecithin, lignin 6 parts, mix homogeneously, obtain mixture I;

Step 3, in parts by weight, adds sodium hydroxide solution regulation pH to 7.0 in mixture I, adds organic acid 6 parts and the The solids of 1 step gained, after mix homogeneously, stands 24 hours,.

Wherein, by dry crushed stalk to stalk particle size in 8cm, the mass concentration of institute's gelatine solution in step 1 It is 0.08%.The mass concentration of sodium hydroxide solution described in step 3 is 2%, and described organic acid is malic acid, and mixed process exists CO2Atmosphere is carried out.

Embodiment 5

The present embodiment is with the difference of embodiment 2: can also add cinnamic aldehyde 1~7 parts in step 2.

The preparation method of a kind of municipal wastewater inorganic agent, comprises the following steps:

Step 1, in parts by weight, takes dry straw 65 parts, pulverizes, and adds sodium cyanoborohydride 8 parts, ammonium ceric nitrate 7 parts and bright Sol solution 125 parts, mix homogeneously, it is warming up to 45 DEG C, is incubated 1.5 hours, adds polyethyl acrylate 6 parts, polyacrylonitrile 3 Part and glutaraldehyde 5 parts, be warming up to 50 DEG C, be incubated 3 hours, be cooled to 8 DEG C, filter, obtain solids;

Step 2, in parts by weight, adds in 70 parts of water by 1-hydroxy ethylidene-1,1-diphosphonic acid 6 parts, PAPE 3 parts, and stirring 5 is little Time, add isothiazolone 6 parts, meerschaum 7 parts, starch xanthate 4 parts, Magnesium sulfate heptahydrate 6 parts, chitosan 3 parts, N, N- Dimethylated methene di 2 ethylhexyl phosphonic acid 5 parts, 4 parts of lecithin, lignin 3 parts, cinnamic aldehyde 7 parts, mix homogeneously, obtain mixture I;

Step 3, in parts by weight, adds sodium hydroxide solution regulation pH to 6.5 in mixture I, adds organic acid 4 parts and the The solids of 1 step gained, after mix homogeneously, stands 24 hours,.

Wherein, by dry crushed stalk to stalk particle size in 8cm, the mass concentration of institute's gelatine solution in step 1 It is 0.08%.The mass concentration of sodium hydroxide solution described in step 3 is 2%, and described organic acid is malic acid, and mixed process exists CO2Atmosphere is carried out.

Embodiment 6

The present embodiment is with the difference of embodiment 5: can also add poly-epoxy succinic acid 2~8 parts in step 3.

The preparation method of a kind of municipal wastewater inorganic agent, comprises the following steps:

Step 1, in parts by weight, takes dry straw 65 parts, pulverizes, and adds sodium cyanoborohydride 8 parts, ammonium ceric nitrate 7 parts and bright Sol solution 125 parts, mix homogeneously, it is warming up to 45 DEG C, is incubated 1.5 hours, adds polyethyl acrylate 6 parts, polyacrylonitrile 3 Part and glutaraldehyde 5 parts, be warming up to 50 DEG C, be incubated 3 hours, be cooled to 8 DEG C, filter, obtain solids;

Step 2, in parts by weight, adds in 70 parts of water by 1-hydroxy ethylidene-1,1-diphosphonic acid 6 parts, PAPE 3 parts, and stirring 5 is little Time, add isothiazolone 6 parts, meerschaum 7 parts, starch xanthate 4 parts, Magnesium sulfate heptahydrate 6 parts, chitosan 3 parts, N, N- Dimethylated methene di 2 ethylhexyl phosphonic acid 5 parts, 4 parts of lecithin, lignin 3 parts, cinnamic aldehyde 7 parts, poly-epoxy succinic acid 6 parts, mix homogeneously, To mixture I;

Step 3, in parts by weight, adds sodium hydroxide solution regulation pH to 6.5 in mixture I, adds organic acid 4 parts and the The solids of 1 step gained, after mix homogeneously, stands 24 hours,.

Wherein, by dry crushed stalk to stalk particle size in 8cm, the mass concentration of institute's gelatine solution in step 1 It is 0.08%.The mass concentration of sodium hydroxide solution described in step 3 is 2%, and described organic acid is malic acid, and mixed process exists CO2Atmosphere is carried out.

With 100mg/L, embodiment 1 to 6 gained inorganic agent being put into municipal wastewater sample process, result is as follows:

Understanding, sewage chemical oxygen demand can be down to 63 mg/L by the municipal wastewater inorganic agent of the present invention, Biochemical oxygen demand is down to 28 Mg/L, float are down to 35 mg/L, 0.37 mg/L is down to by total phosphorus.Further, since the addition of cinnamic aldehyde, can reduce further The COD of sewage sample and float;And the addition of poly-epoxy succinic acid, the life of sewage sample can be reduced further Change oxygen demand and total phosphorus content.

Claims (8)

1. the preparation method of a municipal wastewater inorganic agent, it is characterised in that: comprise the following steps:
Step 1, in parts by weight, takes dry straw 50~100 parts, pulverizes, add sodium cyanoborohydride 5~12 parts, cerous nitrate Ammonium 6~9 parts and gelatin solution 100~150 parts, mix homogeneously, it is warming up to 40~50 DEG C, is incubated 1~2 hour, adds poly- Ethyl acrylate 4~7 parts, polyacrylonitrile 1~5 parts and glutaraldehyde 2~7 parts, be warming up to 45~55 DEG C, be incubated 2~4 hours, fall Temperature, to 5~10 DEG C, filters, obtains solids;
Step 2, in parts by weight, adds to water 50~80 parts by 1-hydroxy ethylidene-1,1-diphosphonic acid 2~8 parts, PAPE 1~6 parts In, stir 4~6 hours, add isothiazolone 2~7 parts, meerschaum 3~8 parts, starch xanthate 1~6 parts, seven water sulfur Acid magnesium 2~7 parts, chitosan 1~4 parts, N, N-dimethylated methene di 2 ethylhexyl phosphonic acid 3~6 parts, lecithin 2~5 parts, lignin 1~6 parts, Mix homogeneously, obtains mixture I;
Step 3, in parts by weight, adds sodium hydroxide solution regulation pH to 6.0~7.0 in mixture I, adds organic acid 3 ~6 parts and the solids of the 1st step gained, after mix homogeneously, stand 12~24 hours,.
The preparation method of municipal wastewater inorganic agent the most according to claim 1, it is characterised in that: by dry straw in step 1 Stalk is crushed to stalk particle size 5~10cm.
The preparation method of municipal wastewater inorganic agent the most according to claim 1, it is characterised in that: gelatin described in step 1 The mass concentration of solution is 0.05~0.12%.
The preparation method of municipal wastewater inorganic agent the most according to claim 1, it is characterised in that: hydrogen-oxygen described in step 3 The mass concentration changing sodium solution is 1~3%.
The preparation method of municipal wastewater inorganic agent the most according to claim 1, it is characterised in that: organic described in step 3 Acid is the one in malic acid, citric acid or tartaric acid.
The preparation method of municipal wastewater inorganic agent the most according to claim 1, it is characterised in that: the mixed process of step 3 At CO2Atmosphere is carried out.
The preparation method of municipal wastewater inorganic agent the most according to claim 1, it is characterised in that: step 2 can also add Enter cinnamic aldehyde 1~7 parts.
The preparation method of municipal wastewater inorganic agent the most according to claim 1, it is characterised in that: step 3 can also add Enter poly-epoxy succinic acid 2~8 parts.
CN201610132286.8A 2016-03-09 2016-03-09 Preparation method of municipal sewage treating agent CN105776364A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610132286.8A CN105776364A (en) 2016-03-09 2016-03-09 Preparation method of municipal sewage treating agent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610132286.8A CN105776364A (en) 2016-03-09 2016-03-09 Preparation method of municipal sewage treating agent

Publications (1)

Publication Number Publication Date
CN105776364A true CN105776364A (en) 2016-07-20

Family

ID=56387455

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610132286.8A CN105776364A (en) 2016-03-09 2016-03-09 Preparation method of municipal sewage treating agent

Country Status (1)

Country Link
CN (1) CN105776364A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11138179A (en) * 1997-11-14 1999-05-25 Nippon Gijutsu Kaihatsu Center:Kk Gradually dissolving water treating agent and its production
CN102583600A (en) * 2012-03-22 2012-07-18 杭州一清环保工程有限公司 Composite purifying agent used for purifying sewage in river channel
CN103641247A (en) * 2013-12-27 2014-03-19 姚为 Domestic sewage treatment agent and preparation method thereof
CN104472539A (en) * 2014-11-27 2015-04-01 苏州佑君环境科技有限公司 Non-oxidized type compound bactericide for water treatment and preparation method thereof
CN105016444A (en) * 2015-07-24 2015-11-04 刘雷 Efficient sewage treating agent and method for treating sewage by using same
CN105056902A (en) * 2015-08-03 2015-11-18 四川农业大学 Method for treatment of anionic pollutant containing wastewater with modified tobacco straw

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11138179A (en) * 1997-11-14 1999-05-25 Nippon Gijutsu Kaihatsu Center:Kk Gradually dissolving water treating agent and its production
CN102583600A (en) * 2012-03-22 2012-07-18 杭州一清环保工程有限公司 Composite purifying agent used for purifying sewage in river channel
CN103641247A (en) * 2013-12-27 2014-03-19 姚为 Domestic sewage treatment agent and preparation method thereof
CN104472539A (en) * 2014-11-27 2015-04-01 苏州佑君环境科技有限公司 Non-oxidized type compound bactericide for water treatment and preparation method thereof
CN105016444A (en) * 2015-07-24 2015-11-04 刘雷 Efficient sewage treating agent and method for treating sewage by using same
CN105056902A (en) * 2015-08-03 2015-11-18 四川农业大学 Method for treatment of anionic pollutant containing wastewater with modified tobacco straw

Similar Documents

Publication Publication Date Title
Van Den Hende et al. Treatment of industrial wastewaters by microalgal bacterial flocs in sequencing batch reactors
Wang et al. Understanding the role of extracellular polymeric substances in an enhanced biological phosphorus removal granular sludge system
CN104903252B (en) For processing the compositions of waste water
Wu et al. Disintegration of excess activated sludge with potassium permanganate: feasibility, mechanisms and parameter optimization
Wilsenach et al. Phosphate and potassium recovery from source separated urine through struvite precipitation
Cassidy et al. Nitrogen and phosphorus removal from an abattoir wastewater in a SBR with aerobic granular sludge
Chao et al. Influence of process loading intensity on sludge clarification and thickening characteristics
Pijuan et al. Reducing the startup time of aerobic granular sludge reactors through seeding floccular sludge with crushed aerobic granules
JP4516025B2 (en) Method and apparatus for producing / recovering magnesium ammonium phosphate
Huang et al. Recovery and removal of ammonia–nitrogen and phosphate from swine wastewater by internal recycling of struvite chlorination product
Linlin et al. The formation and characteristics of aerobic granules in sequencing batch reactor (SBR) by seeding anaerobic granules
JP4297615B2 (en) High-speed coagulating sedimentation wastewater treatment method
Sternberg et al. Cadmium removal using Cladophora in batch, semi-batch and flow reactors
Deng et al. Role and influence of extracellular polymeric substances on the preparation of aerobic granular sludge
CN101544412B (en) Aquaculture water purifying agent and preparation method thereof
JP3576277B2 (en) Inactivation of liquid waste, mud and solid waste containing heavy metals by sulfate reducing bacteria
Rosman et al. Cultivation of aerobic granular sludge for rubber wastewater treatment
JP4804888B2 (en) Granular microbial sludge generation method
Laliberte et al. Effect of phosphorus addition on nutrient removal from wastewater with the cyanobacterium Phormidium bohneri
CN102887581B (en) Flocculating agent for treating sewage in Chinese patent medicine production enterprises and preparation method thereof
Shpiner et al. Treatment of oil well “produced water” by waste stabilization ponds: removal of heavy metals
Zhao et al. Observations on ozone treatment of excess sludge
Deng et al. Fluoride removal by induced crystallization using fluorapatite/calcite seed crystals
CN105384201A (en) Treatment agent for treating heavy metal sewage, and preparation method and application thereof
CN102276034B (en) Process method for removing fluorides in high concentrations of fluoride-containing wastewater from thermal power plant

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20160720