CN107902752A

CN107902752A - Prevent the sewage-treating agent of sludge bulking

Info

Publication number: CN107902752A
Application number: CN201711213456.6A
Authority: CN
Inventors: 唐毅
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-11-28
Filing date: 2017-11-28
Publication date: 2018-04-13

Abstract

The present invention provides the sewage-treating agent for preventing sludge bulking, its preparation method are as follows：Its preparation method is as follows：To TiO₂Dispersant is added in solution, sulphur acid for adjusting pH value is pre-dispersed to 5~5.5 progress, at 40~50 DEG C, adds TiO₂The zirconium dioxide of quality 0.1~0.3%, is aged 2~3h；Then dispersant being added again under heat-retaining condition, being stirred evenly, sulphur acid for adjusting pH value to 5~5.5, adds TiO₂The zirconium dioxide of quality 0.01~0.03%, is aged 2~3h, filters, 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

Prevent the sewage-treating agent of sludge bulking

Technical field

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

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 for preventing sludge bulking, and its preparation method is as follows：To TiO₂Dispersant is added in solution, sulphur acid for adjusting pH value is pre-dispersed to 5~5.5 progress, at 40~50 DEG C, adds TiO₂Quality 0.1~0.3% zirconium dioxide, is aged 2~3h；Then dispersant is added again under heat-retaining condition, stir evenly, sulphur acid for adjusting pH Value adds TiO to 5~5.5₂The zirconium dioxide of quality 0.01~0.03%, is aged 2~3h, filters, dry, to obtain the final product.

During first time zirconia-coated, the additive amount of zirconium dioxide is few, be only titania weight 0.1~ 0.3%, temperature of plate is relatively low, is only 40~50 DEG C, and zirconium dioxide forms loose island cladding, bag in titanium dioxide surface at this time Cover very sparse.Since first time covering amount is less, substantial amounts of titanium dioxide is there remains in solution, continues to add dispersant, Titanium dioxide is extremely easily adsorbed at the loose island of the titanium dioxide granule through zirconia-coated under the action of dispersant On surface, add zirconium dioxide and carry out second of cladding, temperature of plate is still maintained at 40~50 DEG C at this time, therefore, continues More sparse island cladding is formed in titanium dioxide surface.Thin titanium dioxide surface is coated on since zirconium oxide is sparse On, larger gap is left, and aperture diameter is more than der Pilz tentacle diameter, der Pilz tentacle can be extend into inside inorganic agent, And the grid system of titanium dioxide uniqueness, der Pilz tentacle, which can make a noise, snarls, since der Pilz tentacle is generally longer, the application Using multilayer coating structure, it can make a noise and snarl der Pilz tentacle, greatly reduce der Pilz specific surface area, contain der Pilz and bacterium The competitive advantage of micelle, keeps strong status of the zoogloea in substrate competition, efficiency of sludge treatment is improved, so as to effectively prevent With the outburst of containment sludge bulking.

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, sulphur acid for adjusting pH value is pre-dispersed to 5 progress, at 40 DEG C, adds TiO₂The zirconium dioxide 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 Even, sulphur acid for adjusting pH value to 5, adds TiO₂The zirconium dioxide of quality 0.01%, is aged 2h, and filtering, 12h is baked at 105 DEG C, 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, sulphur acid for adjusting pH value is pre-dispersed to 5.5 progress, at 50 DEG C, adds TiO₂The zirconium dioxide 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, sulphur acid for adjusting pH value to 5.5, add TiO₂The zirconium dioxide of quality 0.03%, is aged 3h, filtering, is baked at 120 DEG C 24h, 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, sulphur acid for adjusting pH value is pre-dispersed to 5.4 progress, at 45 DEG C, adds TiO₂The zirconium dioxide 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, sulphur acid for adjusting pH value to 5.3, add TiO₂The zirconium dioxide of quality 0.02%, is aged 2.5h, filters, 18h is baked at 115 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, sulphur acid for adjusting pH value is pre-dispersed to 5.5 progress, at 50 DEG C, adds TiO₂The zirconium dioxide of quality 0.1%, it is old Change 2h；Then calgon is added again under heat-retaining condition, the additive amount of calgon is TiO₂The 0.1% of weight, Stir evenly, sulphur acid for adjusting pH value to 5, add TiO₂The zirconium dioxide of quality 0.03%, is aged 2h, 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. prevent the sewage-treating agent of sludge bulking, it is characterised in that：Its preparation method is as follows：To TiO₂Added in solution scattered Agent, sulphur acid for adjusting pH value is pre-dispersed to 5~5.5 progress, at 40~50 DEG C, adds TiO₂The titanium dioxide of quality 0.1~0.3% Zirconium, is aged 2~3h；Then dispersant being added again under heat-retaining condition, being stirred evenly, sulphur acid for adjusting pH value to 5~5.5, adds TiO₂The zirconium dioxide of quality 0.01~0.03%, is aged 2~3h, filters, dry, to obtain the final product.

2. the sewage-treating agent according to claim 1 for preventing sludge bulking, it is characterised in that：TiO₂The quality of solution is dense Spend for 20~30%.

3. the sewage-treating agent according to claim 1 for preventing sludge bulking, it is characterised in that：Institute's dispersant is six Sodium metaphosphate.

4. the sewage-treating agent according to claim 3 for preventing sludge bulking, it is characterised in that：Calgon is each Additive amount is TiO₂The 0.1~0.2% of weight.

5. the sewage-treating agent according to claim 1 for preventing sludge bulking, it is characterised in that：The drying is by filter cake 12~24h is baked at 105~120 DEG C.