CN105776758B

CN105776758B - A kind of Modified SBR sewage treatment process of IV class of surface water up to standard

Info

Publication number: CN105776758B
Application number: CN201610245878.0A
Authority: CN
Inventors: 张静; 张辉; 胡洁; 侯红勋; 朱甲华
Original assignee: Anhui Guoshen Environment Protection And Energy Saving Science And Technology Co
Current assignee: Cecep Guozhen Environmental Protection Technology Co.,Ltd.
Priority date: 2016-04-20
Filing date: 2016-04-20
Publication date: 2018-09-28
Anticipated expiration: 2036-04-20
Also published as: CN105776758A

Abstract

The present invention discloses a kind of Modified SBR sewage treatment process of IV class of surface water up to standard, includes the following steps：Sewage removes the SS in water removal by pretreatment；Water outlet enters the ponds SBR after pretreatment, passes through stirring 60min, first time 60 80min of aeration successively, adds carbon source and stir 30min, be aerated 10min for second, precipitation 40min, drain 60min, subsequently into next cycle；The supernatant of the ponds SBR discharge enters coagulation reaction tank and carries out chemical dephosphorization；Coagulation reaction tank water outlet further removes remaining nitrate nitrogen into denitrification filter pool；Denitrification filter pool water outlet is discharged after carrying out disinfection into sterilization pool.It stirs, be aerated for the first time by water inlet successively in sbr reactor pond of the present invention, adding carbon source stirring, second of aeration, precipitation and drain step, in conjunction with rear-mounted denitrification filter tank advanced nitrogen, and the chemical dephosphorization technique of depth, there is good Nitrogen/Phosphorus Removal.

Description

A kind of Modified SBR sewage treatment process of IV class of surface water up to standard

Technical field

The invention belongs to sewage treatment field, the Modified SBR sewage treatment process of specifically a kind of IV class of surface water up to standard.

Background technology

As China's water pollution problems increasingly highlights, the raising of urban wastewater treatment discharge standard has been trend of the times.From The requirement that current quality of water environment improves sees, treated for many municipal sewage plants, and water outlet is often discharged into urban river, As the water body in river.The existing sewage disposal plant effluent in China, discharge standard refer to more《GB 18918-2002 town sewages Treatment plant's pollutant emission standard》In level-one A.However for level-one A standards, water quality just corresponds to bad V class of surface water Water.This water quality is discharged into the water body environment there are few self-purification capacity, causes water body not repaired not only, instead by dirt Then there is the phenomenon that ' the more controlling the more dirty ' in dye.Water pollution increasingly sharpens, and an urgent demand effluent of municipal sewage plant reaches IV class standard of earth's surface class.CODCr is reduced to 30mg/l by the 50mg/L of level-one A；BOD5 is reduced by the 10mg/L of level-one A To 6mg/L；Ammonia nitrogen by level-one A 5mg/L（8mg/L）It is reduced to 1.5mg/L（2.5mg/L）；Total phosphorus by level-one A 0.5mg/L It is reduced to 0.3mg/L；Total nitrogen is reduced to 5mg/L by the 15mg/L of level-one A（10mg/L）.Currently, the ground such as Beijing, Kunming, Hefei Expansion practice successively, the requirement higher to sewage effluents CODCr, ammonia nitrogen, total nitrogen, total phosphorus etc..

Invention content

In view of the deficiencies of the prior art, the present invention proposes a kind of Modified SBR sewage treatment process of IV class of surface water up to standard.

The purpose of the present invention can be achieved through the following technical solutions：

A kind of Modified SBR sewage treatment process of IV class of surface water up to standard, which is characterized in that the technique specifically include with Lower step：

（1）Sewage removes the SS in water removal by pretreatment；

（2）Water outlet enters the ponds SBR after pretreatment, and SBR is stirred in pond equipped with blender, power of agitator 4-10W/ m³, anti-nitration reaction is carried out using remaining nitrate nitrogen in the period upper to SBR of the carbon source in raw water, biology is carried out at the same time and removes Phosphorus；First time aeration is carried out after stirring 60min, is further carbonized to remaining organic matter in water inlet, while to the ammonia in water inlet Nitrogen carries out nitration reaction and is transformed into nitrate nitrogen；Aeration terminates to add carbon source and stir 30min, power of agitator 4-10W/ for the first time m³, carry out second and be aerated, residual organic matter in the ponds SBR is further removed；Second of aeration terminates to staticly settle 40min is separated by solid-liquid separation；60min is drained, supernatant is discharged, subsequently into next cycle；

（3）The supernatant of the ponds SBR discharge enters coagulation reaction tank and carries out chemical dephosphorization；

（4）Coagulation reaction tank water outlet further removes remaining nitrate nitrogen into denitrification filter pool；

（5）Denitrification filter pool water outlet is discharged after carrying out disinfection into sterilization pool.

The first time aeration time is 60-80min；Second of aeration time is 10min；Aeration and for the first time The DO values of secondary aeration are held in 2mg/L- 4mg/L.

The pre-treatment step is that sewage carries out preliminary sedimentation by setting pot or sedimentation basin.

The coagulation reaction tank adds chemical dephosphorization medicament, and it is molysite or aluminium salt that the chemical dephosphorization, which adds medicament,.

Beneficial effects of the present invention：It stirs by water inlet successively in sbr reactor pond of the present invention, is aerated for the first time, adds carbon Source stirring, second of aeration, precipitation and drain step, are removed in conjunction with the chemistry of rear-mounted denitrification filter tank advanced nitrogen and depth Phosphorus technique has good Nitrogen/Phosphorus Removal, it can be ensured that stablizing for IV class water Effluent criteria of class is realized.

Description of the drawings

Fig. 1 is present invention process flow chart.

Specific implementation mode

The present invention is described in further details with reference to specific embodiment.

Such as Fig. 1.

A kind of Modified SBR sewage treatment process of IV class of surface water up to standard, includes the following steps：

1, the sewage that sewage plant generates removes the SS in water removal by the pretreatment of setting pot or sedimentation basin, it is ensured that follow-up raw Change the stabilization of reaction.

2, water outlet enters the ponds SBR after pre-processing, and SBR is stirred in pond equipped with blender, and power of agitator is according to 4-10W/ m³Pool capacity considers, when mixed liquid concentration is high either Chi Shen great when taking high level mixed liquid concentration low or pond deep hour take low value, Anti-nitration reaction is carried out using remaining nitrate nitrogen in the period upper to SBR of the carbon source in raw water, is carried out at the same time biological phosphate-eliminating；It stirs First time aeration is carried out after mixing 60min, first time aeration time is 60-80min, to the further carbon of remaining organic matter in water inlet Change, while nitration reaction is carried out to the ammonia nitrogen in water inlet and is transformed into nitrate nitrogen；Aeration terminates to add carbon source and stir for the first time 30min, power of agitator are same as above, and anti-nitration reaction is carried out to the nitrate nitrogen that aeration phase generates；Then it carries out being aerated for second, the Secondary aeration time is 10min, is further removed to residual organic matter in the ponds SBR；It is heavy that second of aeration terminates to stand Shallow lake 40min is separated by solid-liquid separation；60min is drained, supernatant is discharged, subsequently into next cycle.It is aerated for the first time and second The DO values of aeration are held in 2mg/L-4mg/L.

3, the supernatant of the ponds SBR discharge enters coagulation reaction tank, adds chemical dephosphorization medicament, carries out chemical dephosphorization, chemistry It is molysite or aluminium salt that dephosphorization, which adds medicament, and added amount of chemical is determined according to sewage quantity and pollutant load.

4, coagulation reaction tank water outlet further removes remaining nitrate nitrogen into denitrification filter pool, to reach removal total nitrogen Purpose, and the metal phosphorizing that coagulation reaction tank generates is closed into object flco and is filtered removal total phosphorus.

5, denitrification filter pool water outlet is discharged after carrying out disinfection into sterilization pool.

Above content is only to structure of the invention example and explanation, affiliated those skilled in the art couple Described specific embodiment does various modifications or additions or substitutes by a similar method, without departing from invention Structure or beyond the scope defined by this claim, is within the scope of protection of the invention.

Claims

1. a kind of Modified SBR sewage treatment process of IV class of surface water up to standard, which is characterized in that the technique specifically includes following Step：

（1）Sewage removes the ss suspended solid in water removal by pretreatment precipitation；The pre-treatment step be sewage by setting pot or Sedimentation basin carries out preliminary sedimentation；

（2）Water outlet enters the ponds SBR after pretreatment, and SBR is stirred in pond equipped with blender, power of agitator 4-10W/m³, utilize Remaining nitrate nitrogen carries out anti-nitration reaction in a carbon source period upper to SBR in raw water, is carried out at the same time biological phosphate-eliminating；Stirring First time aeration is carried out after 60min, is further carbonized to remaining organic matter in water inlet, while nitre is carried out to the ammonia nitrogen in water inlet Change reaction and is transformed into nitrate nitrogen；Aeration terminates to add carbon source and stir 30min, power of agitator 4-10W/m for the first time³, carry out Second of aeration, further removes residual organic matter in the ponds SBR；Second of aeration terminates to staticly settle 40min, Gu Liquid detaches；60min is drained, supernatant is discharged, subsequently into next cycle；

（3）The supernatant of the ponds SBR discharge enters coagulation reaction tank and carries out chemical dephosphorization；The coagulation reaction tank adds chemical dephosphorization Medicament, it is molysite or aluminium salt that the chemical dephosphorization, which adds medicament,；

2. the Modified SBR sewage treatment process of IV class of surface water up to standard according to claim 1, which is characterized in that described First time aeration time is 60-80min；Second of aeration time is 10min；The DO of aeration and second of aeration for the first time Value is held in 2mg/L- 4mg/L.