I. overview
A combination of integrated buried sewage treatment device with biological contact oxidation process for the core technology of high efficiency sewage purification equipment, it can be buried underground, the government planning approval, dispense with the ground building design and construction, insulation and other complex links. Meanwhile, the utility model has the advantages of good quality of effluent water, stable operation, simple management and low noise.
A combination of buried sewage treatment equipment has a wide range of applications, it is suitable for hotels, restaurants, hospitals, residential areas, the new rural reconstruction, office buildings, shopping malls, nursing homes, schools and other places of sewage treatment, treatment and application in food, papermaking, brewing, slaughtering and other organic wastewater.
Two, equipment features
The combined integrated buried sewage treatment equipment has the following characteristics:
1, can be buried underground
2, less sludge production
3, no impact on the surrounding environment
4, automatic control, no need for personnel management
5, simple operation, convenient maintenance
6, the craft is novel, the effect is good
7, long service life
Combination of integrated buried sewage treatment equipment specifications from 0.5m per hour to 30 m, etc., the box made of carbon steel plate, inside and outside the use of epoxy asphalt corrosion protection, the service life can generally reach more than 15 years.
Three, equipment, process description
Design of combined integrated buried sewage treatment equipment is mainly domestic sewage and industrial organic wastewater treatment are similar, the main processing means is the use of the established biochemical treatment technology: contact oxidation method. The equipment consists of five parts: 1. hydrolytic acidification tank, 2., two stage contact oxidation tank, 3. sedimentation tank, 4. sludge tank, 5. disinfection tank
3.1 process flow diagram
The grid pool, the regulating pool, the hydrolysis acidification tank, the A, the aerobic pool, the O, the aerobic pool, the O, the sedimentation tank, the sludge tank, the disinfection tank and the standard discharge
3.2 process description
1. hydrolysis acidification tank
The purpose of hydrolysis acidification is to do the pretreatment of aerobic biochemical treatment in the back. Stay in the pool in the wastewater hydrolysis anaerobic fermentation, further improve and improve the biodegradability of wastewater, to improve the biochemical reaction rate, shorten the time and reduce the energy consumption of biochemical reaction and reduce the operation cost.
2. contact oxidation tank
The water flow into the oxidation hydrolysis acidification tank for biochemical treatment, the oxidation pool is divided into 2 levels, most of the organic material in the original waste water degradation and purification, aerobic bacteria to carrier with organic matter in the sewage for food, the organic matter in the sewage is decomposed into inorganic, so as to achieve the purpose of purification. Aerobic bacteria must have sufficient oxygen to survive, that is, sufficient dissolved oxygen in the sewage to achieve biochemical treatment purposes. The aerobic pool is provided by the air blower, using a new type of combined biological filling tank, the filler surface area ratio, long service life, easy film formation and corrosion resistance, the bottom of the pool by rotary mixing aerator, the dissolved oxygen transfer rate is high, and light weight, not aging, is not easy to be blocked, long life and so on.
3. sedimentation tank
Sewage by biological contact oxidation pond effluent flows into the sedimentation tank, in order to further precipitation to remove detached biofilm and some organic and inorganic particles, sedimentation tank is based on the principle of gravity, when the wastewater containing suspended solids from the bottom upward flow, by gravity for the material to settle down. After the sedimentation tank sedimentation, the water is more clear and transparent. The lower part is provided with a conical settling zone and a sludge lifting device, and the precipitated sludge gas lifting type is raised to the sludge aerobic digestion tank.
4. aerobic sludge digestion tank
The excess sludge discharged from the sedimentation tank is treated with aerobic digestion in the aerobic digestion tank of sludge to reduce the volume of sludge and improve the stability of sludge. Less sludge aerobic digestion after cleaning, available tankerage suction from the sludge tank inspection hole extends to the sludge tank bottom suction after Sinotrans (cleaning once a year).
5. sterilizing tank and sterilizing device
At present, there are many ways of disinfection, such as liquid chlorine, ozone, sodium hypochlorite, chlorine dioxide, etc.. Although sodium hypochlorite has the advantages of convenient distribution, low cost and high reliability, it can be combined with some organic compounds in water to produce organic halides with carcinogenic function. Chlorine dioxide is a disinfectant with broad-spectrum, quick and safe international, its security by the WHO (WHO) as the fourth generation of AI disinfection products, anti-virus ability is 2.6 times of sodium hypochlorite, chlorine disinfection products is much higher than other series. (disinfection equipment will be supplied separately according to user's needs)
Equipment structure and characteristics
A combination of integrated wastewater treatment equipment for underground setting, repair and maintenance more difficult, so in the design of the equipment taking into account the maintenance free of it, the equipment structure is reasonable and reliable, while also taking into account even if there are some faults can also enter the equipment through the equipment inspection hole.
All the facilities are arranged in a plurality of boxes, and the main equipment is made of carbon steel, and all of them are deep corrosion resistant. Internal and external surface by mechanical rust treatment, the use of epoxy asphalt paint for multi-layer anti-corrosion, the service life can generally reach more than 15 years.
