CN107777783A

CN107777783A - Green modified starch multifunctional sewage treating agent

Info

Publication number: CN107777783A
Application number: CN201711214049.7A
Authority: CN
Inventors: 唐毅
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-11-28
Filing date: 2017-11-28
Publication date: 2018-03-09

Abstract

The invention provides green modified starch multifunctional sewage treating agent, is made up of the raw material of following parts by weight：10~15 parts of tapioca, 2~3 parts of medical stone, 4~7 parts of titanium dioxide multilayer coating structure thing；The preparation method of titanium dioxide multilayer coating structure thing is as follows：To TiO₂Dispersant is added in solution, regulation pH value is pre-dispersed to 9~10 progress, at 40~50 DEG C, adds TiO₂The Al2O3 of quality 0.1~0.3%, pH value of solution is adjusted to 8.5~9.5 with aluminum sulfate, is aged 2~3h；Then dispersant is added again under heat-retaining condition, stirred evenly, add TiO₂The Al2O3 of quality 0.01~0.03%, 2~3h is aged, filtered, dried, produce.The additive of the present invention can improve efficiency of sludge treatment, so as to effectively prevent and contain the outburst of sludge bulking.

Description

Green modified starch multifunctional sewage treating agent

Technical field

The invention belongs to technical field of sewage, and in particular to green modified starch multifunctional sewage treating agent.

Background technology

City domestic sewage typically uses active sludge treatment process, if A/O techniques are wherein conventional one kind, many institutes It is well known that active sludge treatment process sludge bulking incidence is high, the incidence of even European and American developed countries is all up to 50~60%, the incidence of city domestic sewage treatment plants at different levels of China is just higher.Once occurring, it endangers pole for sludge bulking To be serious, not only make sludge loss, go out aqueous suspension (SS) severe overweight, and be also greatly reduced the place of sewage disposal system Reason ability, while need considerable time ability recovery system normal.Sewage disposal system for using activated sludge process, Active pollution index is made up of der Pilz and zoogloea, and der Pilz is attached on der Pilz as skeleton, zoogloea so that Sludge flco has preferably flocculation, sedimentation and concentration performance.When der Pilz amount reproduction, when its quantity is close to zoogloea, silk Shape bacterium stretches out from sludge flco, forms the activated sludge skeleton of " seta ball " shape, and these stretch to countless " tentacles " of outside, resistance Hindered the compression between flco, sludge bulking just there occurs, if not containing the further breeding of der Pilz, once the number of der Pilz Amount exceedes zoogloea, and stretching out the tentacle of zoogloea, to may be prevented from flco agglomerating so that and flco is loose, and settling property substantially reduces, Sludge bulking will break out.More than 90% sludge bulking is all relevant with the hyper-proliferative of der Pilz in activated sludge bulking, That is der Pilz hyper-proliferative is controlled with regard to the generation of sludge bulking can be controlled.

The content of the invention

The technical problem to be solved in the present invention is to provide one kind prevention and containment der Pilz excessive multiplication, caused dirt is avoided The sewage-treating agent of mud expansion, and can effectively improve effluent index.

Technical scheme provided by the invention is green modified starch multifunctional sewage treating agent, by the raw material of following parts by weight Composition：10~15 parts of tapioca, 2~3 parts of medical stone, 4~7 parts of titanium dioxide multilayer coating structure thing；

The preparation method of titanium dioxide multilayer coating structure thing is as follows：To TiO₂Dispersant, aluminum sulfate regulation pH are added in solution Value is pre-dispersed to 9~10 progress, at 40~50 DEG C, adds TiO₂The Al2O3 of quality 0.1~0.3%, adjusted with aluminum sulfate molten Liquid pH to 8.5~9.5, it is aged 2~3h；Then dispersant is added again under heat-retaining condition, stirred evenly, add TiO₂Quality 0.01 ~0.03% Al2O3,2~3h is aged, filtered, dried, produce.

During first time alumina-coated, the addition of aluminum oxide is few, only the 0.1~0.3% of titania weight, bag It is relatively low to cover temperature, only 40~50 DEG C, now aluminum oxide form loose island cladding in titanium dioxide surface, coat very dilute Dredge.Because first time covering amount is less, substantial amounts of titanium dioxide is there remains in solution, continues to add dispersant, titanium dioxide exists Extremely it is easily adsorbed on the loose island surface of the titanium dioxide granule of oxidized aluminium cladding, adds in the presence of dispersant Aluminum oxide carries out second of alumina-coated, and now temperature of plate is still maintained at 40~50 DEG C, therefore, continues in titanium dioxide Surface forms more sparse island cladding.It is coated on titanium dioxide surface, leaves larger because aluminum oxide is sparse thin Gap, and aperture diameter is more than der Pilz tentacle diameter, and der Pilz tentacle can be extend into inside inorganic agent, and titanium dioxide is only Special grid system, der Pilz tentacle can be made a noise and snarled, because der Pilz tentacle is general longer, the application uses multilayer coating structure Structure, it can make a noise and snarl der Pilz tentacle, greatly reduce der Pilz specific surface area, contain that the competition of der Pilz and zoogloea is excellent Gesture, strong status of the zoogloea in substrate competition is kept, improves efficiency of sludge treatment, so as to effectively prevent and contain that sludge is swollen Swollen outburst.

TiO₂The mass concentration of solution is 20~30%.

Institute's dispersant is calgon.

The addition of calgon is TiO₂The 0.1~0.2% of weight.

The drying is that filter cake is baked into 12~24h at 105~120 DEG C.

The preparation method of additive of the present invention is：Tapioca, medical stone, titanium dioxide multilayer coating structure thing are mixed, Crush, produce.

The application method of this product：Launched in the water inlet of sewage treatment plants (using active sludge treatment process) dirty Water treatment agent, as wastewater influent COD ＞ 100mg/L, 5~10kg is launched by sewage per ton；When wastewater influent COD concentration is 50 During~100mg/L, 2~5kg is launched by sewage per ton；When wastewater influent COD concentration is 30~50mg/L, thrown by sewage per ton Put 0.5~2kg.

Compared with prior art, additive of the invention uses multilayer coating structure technique, can snarl der Pilz tentacle layer by layer, greatly It is big to reduce der Pilz specific surface area, contain the competitive advantage of der Pilz and zoogloea, keep zoogloea having in substrate competition Power status, efficiency of sludge treatment is improved, so as to effectively prevent and contain the outburst of sludge bulking.

Embodiment

The present invention is further elaborated for specific examples below, but not as a limitation of the invention.

Embodiment 1

1) to the TiO that mass concentration is 20%₂Calgon is added in solution, the addition of calgon is TiO₂ The 0.1% of weight, aluminum sulfate regulation pH value is pre-dispersed to 9 progress, at 40 DEG C, adds TiO₂The Al2O3 of quality 0.1%, use Aluminum sulfate adjusts pH value of solution to 8.5, is aged 2h；Then calgon is added again under heat-retaining condition, calgon Addition is TiO₂The 0.1% of weight, is stirred evenly, and adds TiO₂The AL2O3 of quality 0.01%, 2h is aged, filtering, is dried at 105 DEG C 12h processed, produce titanium dioxide multilayer coating structure thing.

2) by tapioca 10kg, medical stone 2kg, titanium dioxide multilayer coating structure thing 4kg co-grindings, produce.

Embodiment 2

1) to the TiO that mass concentration is 30%₂Calgon is added in solution, the addition of calgon is TiO₂ The 0.2% of weight, aluminum sulfate regulation pH value is pre-dispersed to 10 progress, at 50 DEG C, adds TiO₂The Al2O3 of quality 0.3%, use Aluminum sulfate adjusts pH value of solution to 9.5, is aged 3h；Then calgon is added again under heat-retaining condition, calgon Addition is TiO₂The 0.2% of weight, is stirred evenly, and adds TiO₂The AL2O3 of quality 0.03%, 3h is aged, filtering, is dried at 120 DEG C 24h processed, produce titanium dioxide multilayer coating structure thing.

2) by tapioca 15kg, medical stone 3kg, titanium dioxide multilayer coating structure thing 7kg co-grindings, produce.

Embodiment 3

1) to the TiO that mass concentration is 25%₂Calgon is added in solution, the addition of calgon is TiO₂ The 0.15% of weight, aluminum sulfate regulation pH value is pre-dispersed to 9.5 progress, at 45 DEG C, adds TiO₂The Al2O3 of quality 0.2%, PH value of solution is adjusted to 9 with aluminum sulfate, is aged 2.5h；Then calgon, calgon are added again under heat-retaining condition Addition be TiO₂The 0.15% of weight, is stirred evenly, and adds TiO₂The AL2O3 of quality 0.02%, it is aged 2.5h, filtering, 115 18h is baked at DEG C, produces titanium dioxide multilayer coating structure thing.

2) by tapioca 13kg, medical stone 2.5kg, titanium dioxide multilayer coating structure thing 6kg co-grindings, produce.

Embodiment 4

1) to the TiO that mass concentration is 20%₂Calgon is added in solution, the addition of calgon is TiO₂ The 0.2% of weight, aluminum sulfate regulation pH value is pre-dispersed to 9 progress, at 50 DEG C, adds TiO₂The Al2O3 of quality 0.1%, use Aluminum sulfate adjusts pH value of solution to 9.5, is aged 2h；Then calgon is added again under heat-retaining condition, calgon Addition is TiO₂The 0.1% of weight, is stirred evenly, and adds TiO₂The AL2O3 of quality 0.03%, 2h is aged, filtering, is dried at 120 DEG C 12h processed, produce titanium dioxide multilayer coating structure thing.

2) by tapioca 10kg, medical stone 3kg, titanium dioxide multilayer coating structure thing 4kg co-grindings, produce.

Experimental example

By taking certain municipal sewage plant as an example, using A/O handling process, table 1 is that the factory 2017 year connects in April, 1~2017 Continuous four months actual operating data, its water outlet reach《Urban wastewater treatment firm pollutant emission standard》(GB18918-2002) Middle secondary standard.Applicant carried out launching the experiment of sewage-treating agent continuous four days of April 1~4 in 2017, and this four days respectively The sewage-treating agent of the embodiment of the present invention 1~4 is added in water inlet, and is adjusted according to same day inflow and inlet COD concentration Injected volume, detection water outlet are fully achieved《Urban wastewater treatment firm pollutant emission standard》(GB18918-2002) one-level A is marked in Standard, refer to and be shown in Table 2.

Table 1

Table 2

Claims

1. green modified starch multifunctional sewage treating agent, it is characterised in that：It is made up of the raw material of following parts by weight：Tapioca 10~15 parts, 2~3 parts of medical stone, 4~7 parts of titanium dioxide multilayer coating structure thing；

The preparation method of titanium dioxide multilayer coating structure thing is as follows：To TiO₂Dispersant is added in solution, aluminum sulfate adjusts pH value to 9 ~10 progress are pre-dispersed, at 40~50 DEG C, add TiO₂The Al2O3 of quality 0.1~0.3%, pH value of solution is adjusted with aluminum sulfate To 8.5~9.5,2~3h is aged；Then dispersant is added again under heat-retaining condition, stirred evenly, add TiO₂Quality 0.01~ 0.03% Al2O3,2~3h is aged, filtered, dried, produce；

2. green modified starch multifunctional sewage treating agent according to claim 1, it is characterised in that：TiO₂The matter of solution It is 20~30% to measure concentration.

3. green modified starch multifunctional sewage treating agent according to claim 1, it is characterised in that：Institute's dispersant For calgon.

4. green modified starch multifunctional sewage treating agent according to claim 3, it is characterised in that：Calgon is every Secondary addition is TiO₂The 0.1~0.2% of weight.

5. green modified starch multifunctional sewage treating agent according to claim 1, it is characterised in that：The drying be by Filter cake bakes 12~24h at 105~120 DEG C.