CN107973414A

CN107973414A - Sewage-treating agent

Info

Publication number: CN107973414A
Application number: CN201711214752.8A
Authority: CN
Inventors: 唐毅
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-11-28
Filing date: 2017-11-28
Publication date: 2018-05-01

Abstract

The present invention provides a kind of sewage-treating agent, its preparation method are as follows：To TiO₂Dispersant is added in solution, aluminum sulfate adjusting pH value is pre-dispersed to 9~10 progress, at 40~50 DEG C, adds TiO₂The aluminium oxide of quality 0.1~0.3%, is aged 2~3h；Then dispersant is added again under heat-retaining condition, stirred evenly, adjust pH value of solution to 8.5~9.5 with sodium metasilicate, add TiO₂The SiO of quality 0.01~0.03%₂, 2~3h is aged, is filtered, it is dry, to obtain the final product.The additive of the present invention uses multilayer coating structure technique, der Pilz tentacle can be snarled layer by layer, greatly reduce der Pilz specific surface area, contain the competitive advantage of der Pilz and zoogloea, keep strong status of the zoogloea in substrate competition, efficiency of sludge treatment is improved, so as to effectively prevent and contain the outburst of sludge bulking.

Description

Sewage-treating agent

Technical field

The invention belongs to technical field of sewage, and in particular to a kind of sewage-treating agent.

Background technology

City domestic sewage generally uses active sludge treatment process, if A/O techniques are wherein common 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 with regard to higher.Once occurring, it endangers pole for sludge bulking To be serious, not only make sludge loss, go out aqueous suspension (SS) severe overweight, but also 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 of der Pilz and zoogloea, and der Pilz is attached on der Pilz as skeleton, zoogloea so that Sludge flco has preferable 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, 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 be broken out.More than 90% sludge bulking is all related 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 solution provided by the invention is a kind of sewage-treating agent, and its preparation method is as follows：To TiO₂Added in solution Dispersant, aluminum sulfate adjusting pH value is pre-dispersed to 9~10 progress, at 40~50 DEG C, adds TiO₂Quality 0.1~0.3% Aluminium oxide (alundum (Al2O3)), is aged 2~3h；Then dispersant is added again under heat-retaining condition, stirred evenly, adjusted with sodium metasilicate PH value of solution adds TiO to 8.5~9.5₂The SiO of quality 0.01~0.03%₂, 2~3h is aged, is filtered, it is dry, to obtain the final product.

During first time alumina-coated, the additive amount of aluminium oxide is few, is only the 0.1~0.3% of titania weight, bag It is relatively low to cover temperature, is only 40~50 DEG C, aluminium oxide forms loose island cladding in titanium dioxide surface at this time, coats very dilute Dredge.Since 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 under the action of dispersant Silica carries out second and coats, and temperature of plate is still maintained at 40~50 DEG C at this time, therefore, continues in titanium dioxide surface Form more sparse island cladding.It is coated on titanium dioxide surface, leaves larger since silica is sparse thin Gap, and aperture diameter is more than der Pilz tentacle diameter, der Pilz tentacle can be extend into inside inorganic agent, and titanium dioxide is unique Grid system, can snarl der Pilz tentacle is noisy, since der Pilz tentacle is generally longer, the application uses multilayer coating structure knot Structure, 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, keeps strong status of the zoogloea in substrate competition, 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 additive amount of calgon is TiO₂The 0.1~0.2% of weight.

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

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, improves efficiency of sludge treatment, 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

To the TiO that mass concentration is 20%₂Calgon is added in solution, the additive amount of calgon is TiO₂Weight The 0.1% of amount, aluminum sulfate adjusting pH value is pre-dispersed to 9 progress, at 40 DEG C, adds TiO₂The aluminium oxide of quality 0.1%, ageing 2h；Then calgon is added again under heat-retaining condition, the additive amount of calgon is TiO₂The 0.1% of weight, is stirred It is even, pH value of solution is adjusted to 8.5 with sodium metasilicate, adds TiO₂The SiO of quality 0.01%₂, 2h is aged, filtering, is baked at 105 DEG C 12h, to obtain the final product.

Embodiment 2

To the TiO that mass concentration is 30%₂Calgon is added in solution, the additive amount of calgon is TiO₂Weight The 0.2% of amount, aluminum sulfate adjusting pH value is pre-dispersed to 10 progress, at 50 DEG C, adds TiO₂The aluminium oxide of quality 0.3%, it is old Change 3h；Then calgon is added again under heat-retaining condition, the additive amount of calgon is TiO₂The 0.2% of weight, Stir evenly, adjust pH value of solution to 9.5 with sodium metasilicate, add TiO₂The SiO of quality 0.03%₂, 3h is aged, filtering, dries at 120 DEG C 24h processed, to obtain the final product.

Embodiment 3

To the TiO that mass concentration is 25%₂Calgon is added in solution, the additive amount of calgon is TiO₂Weight The 0.15% of amount, aluminum sulfate adjusting pH value is pre-dispersed to 9.5 progress, at 45 DEG C, adds TiO₂The aluminium oxide of quality 0.2%, It is aged 2.5h；Then calgon is added again under heat-retaining condition, the additive amount of calgon is TiO₂Weight 0.15%, stir evenly, adjust pH value of solution to 9 with sodium metasilicate, add TiO₂The SiO of quality 0.02%₂, it is aged 2.5h, filtering, 115 18h is baked at DEG C, to obtain the final product.

Embodiment 4

To the TiO that mass concentration is 20%₂Calgon is added in solution, the additive amount of calgon is TiO₂Weight The 0.2% of amount, aluminum sulfate adjusting pH value is pre-dispersed to 9 progress, at 50 DEG C, adds TiO₂The aluminium oxide of quality 0.1%, ageing 2h；Then calgon is added again under heat-retaining condition, the additive amount of calgon is TiO₂The 0.1% of weight, is stirred It is even, pH value of solution is adjusted to 9.5 with sodium metasilicate, adds TiO₂The SiO of quality 0.03%₂, 2h is aged, filtering, is baked at 120 DEG C 12h, to obtain the final product.

Experimental example

By taking certain municipal sewage plant as an example, using A/O treatment process, table 1 connects in April, 1~2017 for the factory 2017 year Actual operating data four months continuous, 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, 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) level-one A is marked in Standard, refers to and is shown in Table 2.

Table 1

Table 2

Claims

1. sewage-treating agent, it is characterised in that：Its preparation method is as follows：To TiO₂Dispersant is added in solution, aluminum sulfate adjusts pH Value is pre-dispersed to 9~10 progress, at 40~50 DEG C, adds TiO₂The aluminium oxide of quality 0.1~0.3%, is aged 2~3h；So Dispersant is added again under heat-retaining condition afterwards, is stirred evenly, and is adjusted pH value of solution to 8.5~9.5 with sodium metasilicate, is added TiO₂Quality 0.01~0.03% SiO₂, 2~3h is aged, is filtered, it is dry, to obtain the final product.

2. sewage-treating agent according to claim 1, it is characterised in that：TiO₂The mass concentration of solution is 20~30%.

3. sewage-treating agent according to claim 1, it is characterised in that：Institute's dispersant is calgon.

4. sewage-treating agent according to claim 3, it is characterised in that：The each additive amount of calgon is TiO₂Weight The 0.1~0.2% of amount.

5. sewage-treating agent according to claim 1, it is characterised in that：The drying be by filter cake at 105~120 DEG C Bake 12~24h.