Rural sewage treatment technology

Rural waste water dispersive treatment technology: zero energy consumption active microorganism filter bed

Technology introduction

The treatment technology of zero energy active microorganism filter bed is a new ecological and efficient sewage treatment technology developed by our company. Zero energy active microbial filter bed technology principle: sewage after grille, water collection pool pretreatment in turn into the aerobic biological filter bed (without power since oxygen filling system is used to realize the ascension of the dissolved oxygen) and anaerobic biological filter bed, the biological filter bed, and the aerobic and anaerobic microorganism such as biological effect removal of organic matter, nitrogen and phosphorus pollutants such as wastewater.

Technological process

Technical features

• Zero energy exhaust device: transverse air pipe is installed on top of each layer of filter material. The transverse air pipe is connected with the zero energy exhaust device.
• The non-powered natural ventilation method is adopted for aeration without additional power consumption.
• Filter materials are one or more of the selected ceramic granules, volcanic rocks, and limestone.
• Because of the effect of phosphorus removal from the filter material, it can overcome many problems such as low efficiency of traditional phosphorus removal process, unstable operation and need to add medicine to discharge mud.
• It has the advantages of easy clogging, high efficiency, stability and no maintenance.
• The sewage water distribution device is designed with special structure to distribute water evenly and prevent blockage.
• A protective cover is added to the sewage allocation device to prevent the overflow of the odor and effectively prevent the clogging of the water distribution device caused by the defoliation and lodging of aquatic plants.
• The vertical water distribution and the surface filtering fine sand can form organic accumulation layer on the surface of the wetland and play the role of heat preservation.
• The terrain and terrain can be used to operate in a non-power mode. Under special circumstances, there is no other electromechanical equipment other than lifting the pump.
• It is easy to maintain and manage without special management personnel.

Technical advantage and treatment effect

Zero energy active microbial filter bed treatment technology using unpowered natural oxygen filling in the form of do not need artificial aeration device, seasonal adaptability is strong, water distribution device shielding and groove surface can form the organic accumulation of heat preservation effect, the temperature influence on the treatment effect is not big, plant growth on the upper processing facilities such as reed, both ornamental aquatic plants, can purify the water quality can be not only used as landscape viewing, in addition to having a small amount of solid impurities precipitation separation of the water tank, the remaining facilities do not produce sludge, unattended management, only regular inspection.

The zero-energy energy active microorganism filter bed is composed of aerobic and anaerobic filter bed and each filter bed performs different functions respectively. The removal efficiency of BOD5 is 95% ~ 98%, and the removal efficiency of nitrogen and phosphorus is 70% ~ 90%. This process only USES natural ventilation system for aeration, and saves other electromechanical equipment.

Rural sewage centralized treatment technology: new MBBR technology (new MBBR integrated sewage treatment equipment)

Technology introduction

MBBR treatment has absorbed the advantages of traditional activated sludge process and biological contact oxidation process and become a new and efficient composite process treatment method. MBBR equipment is mainly discharged after centralized treatment of domestic sewage. Anaerobic, hypoxia and good oxygen functional zones are set in the reactor. The improved biological suspension filler, uniform water distribution and gas extraction and reflux are adopted in the design. Based on the research and improvement of the MBBR process, the new integrated sewage treatment equipment has not only retained the advantages of the traditional MBBR method, but also improved and optimized it from the actual engineering, so as to design and produce the mature and practical new integrated MBBR equipment. The new equipment retains the advantages of the traditional integrated equipment of biological contact oxidation method, and makes appropriate parameter adjustment on the internal structure of the equipment and the suspended ball filler, making the new MBBR equipment better and more efficient use of microorganisms to remove organic matters, nitrogen and phosphorus in water compared with the traditional equipment.

Technological process

Technical features

• Taken by the packing for microbes grow in the inside of the packing attached, relatively stable biofilm formation, and easy to form a fluidized state, and lower when preprocessing requirements or the sewage contains a lot of fiber material, USES the specific surface area, small size larger biological packing, when had better pretreatment or for nitrification, USES the specific surface area of biological packing.
• To ensure that there will be no blockage or backflow of siphon from the water inlet section of the water pump to the equipment, and strict regulation and control of the water intake (capacity), so as to ensure the normal operation of subsequent treatment facilities, providing a reliable guarantee for the long-term and stable operation of rural sewage treatment stations.
• To strictly regulate and control well the water dissolved oxygen (DO), under the effect of aeration, water flows with packing, water turbulence degree is without packing, accelerate the renewal of the gas-liquid interface and the transfer of oxygen, the oxygen transfer rate increase, according to different types of water quality, control the quantity of good DO, it is crucial to the whole process of the final treatment effect.
• Equipment body can adopt appropriate material and anticorrosion measures according to the demand of production and manufacturing, equipment appearance may need to carry on the design and production, according to the site according to the requirements of the buried, half the earth and all the earth such as installation, so the quality of the tough new MBBR integration equipment could be longer service life and can be in harmony with the surrounding natural environment and landscape coordination effect.

Technical advantage and treatment effect

The new MBBR wastewater treatment technology has been quite mature and achieved good results in practical application. In MBBR, the biofilm is mainly fixed on the filler, and sludge retention time is independent of hydraulic retention time. Microorganisms such as nitrifying bacteria and nitrite bacteria that have a long generation time and a small specific growth rate can grow on the filler, thus enhancing the ability of denitrification. The denitrification process is divided into two stages: nitrification and denitrification, which are completed by nitrification bacteria and denitrification bacteria respectively. MBBR can realize the relatively independent growth of nitrification bacteria and denitrification bacteria in space, thus optimizing the growth conditions of the two kinds of bacteria groups and enhancing the effect of denitrification. Practical engineering application shows that the introduction of filler can increase the oxygen utilization rate of the original system by more than 10%. Therefore, the aeration amount and operation energy consumption can be reduced correspondingly under the condition of equal oxygen demand. The mobile bed biofilm technology relies on biofilm to treat sewage, which can eliminate the sludge reflux system and avoid the problems of original sludge expansion, sludge floating and loss in activated sludge process. The overall treatment capacity can be easily improved by adding fillers to meet the demand of further expansion of sewage in the future, which provides a good guarantee for the effect of sewage treatment.