Food sewage treatment equipment

  Food processing sewage treatment equipment (1) the food production process belongs to intermittent production mode, with centralized drainage time and uneven water quantity and quality
Regulation must be strengthened to stabilize the water quality and quantity of sewage and avoid the impact of impact load on biological treatment facilities;
(2) Sewage has good biodegradability and fast biodegradation speed, which is suitable for biological treatment;
(3) Sewage contains bacteria, viruses, parasite eggs and some toxic and harmful substances, which must be disinfected before discharge;
  Food factory sewage treatment equipment
Small sewage treatment stations generally adopt the following biological treatment methods:
1
Conventional activated sludge process for sewage treatment equipment in Tofu House
Conventional activated sludge process is widely used in large-scale sewage treatment
However, due to the low load of conventional sludge process, it is easy to produce sludge bulking and difficult to control and manage, it is less and less used in small sewage treatment stations in recent years

2
A / O process of sewage treatment equipment in tofu room
A / O process takes activated sludge as biological carrier and makes sewage achieve the purpose of oxygenation through the function of fan oxygen supply and aeration
Mechanical stirring is set in tank a, the reflux from tank o returns to tank a, and the reverse reaction is carried out in tank a to reduce most of the acid salt nitrogen into nitrogen, and the nitrogen overflows from the wastewater through stirring to achieve the purpose of removing ammonia nitrogen; The effluent from tank a is sent to tank o, which is equipped with blast aeration to remove most of the organic pollutants and convert most of the ammonia nitrogen in the influent into acid salt nitrogen; The activated sludge concentration in the o-section tank can be adjusted according to the needs of wastewater, and the organic matter in wastewater can be adsorbed, oxidized and decomposed through the bacterial micelles in the activated sludge; High removal rate of organic nitrogen and ammonia
However, because there is no independent sludge return system, sludge with unique functions cannot be cultivated, and the degradation rate of refractory substances is low; At the same time, in order to improve the denitrification efficiency, the internal circulation ratio must be increased, which increases the operation cost
In addition, the internal circulating liquid comes from the aeration tank and contains a certain amount of do, which makes it difficult to maintain the ideal anoxic state of section a, affects the reaction effect, and the denitrification rate is difficult to reach 90%

 
  Sewage treatment equipment of new food factory
MBR process is a relatively advanced activated sludge treatment method developed in recent years
The treatment process integrates aeration tank and sedimentation tank, continuously influent, intermittent aeration, sewage sedimentation and skimming the supernatant when the gas is stopped, which becomes a cycle and cycle again and again
There is no sedimentation tank and no sludge reflux equipment for MBR method, but MBR method operates intermittently, and multiple treatment units need to be set
The water inlet and aeration are switched with each other, resulting in complex control
In order to ensure the overflow rate, MBR method has high requirements for the manufacturing of decanter equipment, which must be improved, otherwise it is very easy to cause the final effluent quality not to meet the standard
At present, there is no decanting equipment with good quality in China
The procurement of imported equipment is troublesome and expensive, and the maintenance cost after Tongshu is also high
The sludge concentration in the SBR process tank is measured by the concentration meter in order to control the amount of excess sludge discharged
At present, the immature technology of domestic concentration meter is easy to cause problems such as difficulty in SBR sludge discharge control

  Sewage treatment equipment of new food factory
Biological contact oxidation is a traditional biochemical treatment method
Biological filler is semi soft filler on fixed bed
The semi soft filler is used as the attachment carrier of microorganisms
The organisms are evenly distributed on the biological filler, so as to avoid the uneven distribution of microorganisms
At the same time, the organisms are attached to the surface of the filler and do not flow with the water
Because the biofilm clock is strongly stirred by the updraft and constantly updated, the purification effect is improved
The contact oxidation method has the advantages of short treatment time, small volume, good purification effect, good and stable effluent quality, no reflux and expansion of sludge, low power consumption and so on
Its main features are:
High volume load and strong impact load resistance;
It has the advantages of membrane method and less excess sludge;
It has the advantages of activated sludge process, supplemented by mechanical equipment for fumigation, high biological activity and short sludge age;
It can decompose other substances that are difficult to decompose by biological treatment;
It is easy to manage and eliminate the end of sludge floating and swelling

To sum up, the biological treatment of the project is proposed to adopt & ldquo; Hydrolysis acidification + contact oxidation & rdquo;

 
3、 Main features:
1
It can be buried under the surface
2
Fully automatic control without personnel management
3
No sludge return
4
Simple operation and convenient maintenance
5
Low noise and no peculiar smell