CN107720936A

CN107720936A - Improve the additive of wastewater treatment efficiency

Info

Publication number: CN107720936A
Application number: CN201711213471.0A
Authority: CN
Inventors: 唐毅
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-11-28
Filing date: 2017-11-28
Publication date: 2018-02-23

Abstract

The invention provides the additive for improving wastewater treatment efficiency, its preparation method are as follows：Its preparation method is as follows：To TiO₂Dispersant is added in solution, sodium metasilicate regulation pH value is pre-dispersed to 9~10 progress, at 40~50 DEG C, adds TiO₂The silica of quality 0.1~0.3%, it is aged 2~3h；Then dispersant is added again under heat-retaining condition, stirred evenly, sulphur acid for adjusting pH value to 5~5.5, add TiO₂The zirconium dioxide of quality 0.01~0.03%, 2~3h is aged, filtered, dried, produce.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

Improve the additive of wastewater treatment efficiency

Technical field

The invention belongs to technical field of sewage, and in particular to a kind of additive for improving wastewater treatment efficiency.

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 a kind of additive for improving wastewater treatment efficiency, and its preparation method is as follows：To TiO₂Dispersant is added in solution, sodium metasilicate regulation pH value is pre-dispersed to 9~10 progress, at 40~50 DEG C, adds TiO₂Quality 0.1~0.3% silica, it 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%, 2~3h is aged, filtered, dried, produce.

During first time coated with silica, the addition of silica is few, only the 0.1 of titania weight~ 0.3%, temperature of plate is relatively low, only 40~50 DEG C, and now silica forms loose island cladding, bag in titanium dioxide surface Cover very sparse.Because 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 coated with silica in the presence of dispersant On surface, add zirconium dioxide and carry out second of cladding, now temperature of plate is still maintained at 40~50 DEG C, therefore, continues More sparse island cladding is formed in titanium dioxide surface.Thin titanium dioxide surface is coated on because 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 that titanium dioxide is unique, der Pilz tentacle, which can make a noise, snarls, due to general longer, the application of der Pilz tentacle 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, strong status of the zoogloea in substrate competition is kept, improves efficiency of sludge treatment, 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 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 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

To the TiO that mass concentration is 20%₂Calgon is added in solution, the addition of calgon is TiO₂Weight The 0.1% of amount, sodium metasilicate regulation pH value is pre-dispersed to 9 progress, at 40 DEG C, adds TiO₂The silica of quality 0.1%, it is old Change 2h；Then calgon is added again under heat-retaining condition, the addition of calgon is TiO₂The 0.1% of weight, Stir evenly, sulphur acid for adjusting pH value to 5, add TiO₂The zirconium dioxide of quality 0.01%, 2h is aged, filtering, is baked at 105 DEG C 12h, produce.

Embodiment 2

To the TiO that mass concentration is 30%₂Calgon is added in solution, the addition of calgon is TiO₂Weight The 0.2% of amount, sodium metasilicate regulation pH value is pre-dispersed to 10 progress, at 50 DEG C, adds TiO₂The silica of quality 0.3%, It is aged 3h；Then calgon is added again under heat-retaining condition, the addition of calgon is TiO₂Weight 0.2%, stir evenly, sulphur acid for adjusting pH value to 5.5, add TiO₂The zirconium dioxide of quality 0.03%, it is aged 3h, filtering, at 120 DEG C Lower baking 24h, is produced.

Embodiment 3

To the TiO that mass concentration is 25%₂Calgon is added in solution, the addition of calgon is TiO₂Weight The 0.15% of amount, sodium metasilicate regulation pH value is pre-dispersed to 9.5 progress, at 45 DEG C, adds TiO₂The titanium dioxide of quality 0.2% Silicon, it is aged 2.5h；Then calgon is added again under heat-retaining condition, the addition 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%, 2.5h is aged, filtered, 18h is baked at 115 DEG C, is produced.

Embodiment 4

To the TiO that mass concentration is 20%₂Calgon is added in solution, the addition of calgon is TiO₂Weight The 0.2% of amount, sodium metasilicate regulation pH value is pre-dispersed to 9 progress, at 50 DEG C, adds TiO₂The silica of quality 0.1%, it is old Change 2h；Then calgon is added again under heat-retaining condition, the addition 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%, 2h is aged, filtering, is baked at 120 DEG C 12h, 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. improve the additive of wastewater treatment efficiency, it is characterised in that：Its preparation method is as follows：To TiO₂Added in solution scattered Agent, sodium metasilicate regulation pH value is pre-dispersed to 9~10 progress, at 40~50 DEG C, adds TiO₂The dioxy of quality 0.1~0.3% SiClx, it is aged 2~3h；Then dispersant is added again under heat-retaining condition, stirred evenly, sulphur acid for adjusting pH value to 5~5.5, add TiO₂The zirconium dioxide of quality 0.01~0.03%, 2~3h is aged, filtered, dried, produce.

2. the additive according to claim 1 for improving wastewater treatment efficiency, it is characterised in that：TiO₂The quality of solution is dense Spend for 20~30%.

3. the additive according to claim 1 for improving wastewater treatment efficiency, it is characterised in that：Institute's dispersant is six Sodium metaphosphate.

4. the additive according to claim 3 for improving wastewater treatment efficiency, it is characterised in that：Calgon is each Addition is TiO₂The 0.1~0.2% of weight.

5. the additive according to claim 1 for improving wastewater treatment efficiency, it is characterised in that：The drying is by filter cake 12~24h is baked at 105~120 DEG C.