What are the advantages and disadvantages of anaerobic biological treatment technology compared with

1.Temperature: There are two different optimal temperature ranges (around 55, around 35). The so-called high-temperature anaerobic digestion and low-temperature anaerobic digestion correspond to these two optimal temperature ranges.

Value. The optimal pH range for anaerobic digestion is:

3.Organic load: Since anaerobic biological treatment has a degrading effect on almost all organic matter in the wastewater, when discussing anaerobic biological treatment, CODCR is generally used for analysis and research, rather than BOD5 as in aerobic biological treatment.

The organic load of anaerobic treatment is usually expressed in terms of volumetric loading and a certain CODCR removal rate.

4.Nutrients: The ratio of carbon, nitrogen and phosphorus in the anaerobic method can be controlled at CODCR:N:P=(200 300): 5:1. Methane.

bacteria against hydrogen sulfide.

The optimal requirement is: Sometimes it is necessary to supplement with certain essential special nutrients, methanobacteria against sulfides.

and phosphorus have an obligate need, while iron, nickel, zinc, cobalt, molybdenum, etc. have an activating effect on methanobacteria.

5.Redox potential.

The redox potential can indicate the oxygen concentration in the water, and the non-methane anaerobic microorganisms can survive in an environment with a redox potential of less than +100mV, while the redox potential suitable for methanogenesis activities is less than -150mV, and the redox potential is not higher than -330mV in the early stage of methanobacteria culture.

6.Alkalinity. The alkalinity formed by the bicarbonate of the wastewater has a buffering effect on the change of pH value, and if the alkalinity is insufficient, sodium bicarbonate needs to be added.

and lime and other alkaline agents to ensure that the alkalinity in the reactor is moderate.

7.Toxic substances.

On the one hand, a higher water flow velocity can improve the disturbance of the inlet area in the sewage system, thereby increasing the contact between the biological sludge and the influent organic matter, and improving the removal rate of organic matter. On the other hand, in order to maintain sufficient sludge in the system, the upflow velocity must not exceed a certain limit.

Temperature value 3Organic load 4Nutrients 5Redox potential 6Alkalinity 7Hazardous Substances 8Hydraulic retention time.

Hope it helps

Aerobic biological treatment:

A treatment method in which aerobic microorganisms (including facultative microorganisms) are biologically metabolized in the presence of oxygen to degrade organic matter and make it stable and harmless. Microorganisms use the organic pollutants present in the water as substrates for aerobic metabolism, and after a series of biochemical reactions, the energy is released step by step, and finally stabilized with low-energy inorganic substances to meet the requirements of harmlessness, so as to return to the natural environment or further treatment. In addition, under the condition of sufficient oxygen supply, the nitrification of aerobic autotrophic bacteria oxidizes NH3-N(NH4+) to NO3-, which in turn provides NO3- for anaerobic heterotrophic bacteria

Anaerobic Biological Treatment:

Heterotrophic bacteria in the anoxic section hydrolyze suspended pollutants such as starch, fiber, carbohydrates and soluble organic matter in sewage into organic acids, decompose macromolecular organic matter into small molecule organic matter, and convert insoluble organic matter into soluble organic matter. In the anoxic section, heterotrophic bacteria ammoniate proteins, fats and other pollutants (N on the organic chain or amino groups in amino acids) to release ammonia (NH3, NH4+), and reflux to the anaerobic section through the aerobic stage, and under anoxic conditions, the denitrification of isoxic bacteria reduces NO3- to molecular nitrogen (N2) to complete the cycle of C, N, and O in the ecology.

In actual application, A and O are mostly mixed, and A is mostly first.

What are the main methods of aerobic biological treatment and anaerobic biological treatment, and briefly describe the advantages and disadvantages of aerobic and anaerobic treatment methods.

Oxygen biological treatment:1Sludge Flow Reaction Tank:

Through the sludge flow reaction tank, the typical biological treatment process mainly includes several links, such as mixing, oxidation, biological absorption, sedimentation, activated sludge aeration, etc. The advantage is that it can be used in a wide range of applications, which can effectively process nutrients while removing pollutants such as suspended solids, chemical oxygen demand (COD), biochemical oxygen demand (BOD), etc. The disadvantages are high investment and operating costs, and poor treatment of resistant bacteria or resistant substances in sewage.

2.Biological filter: It is mainly to put the sewage into the filter, and after the operation of mechanical devices and biological pollutants filtration, the organic matter, inorganic matter and suspended matter in the sewage are precipitated, so as to achieve the purpose of purifying the sewage.

The advantages are that the equipment maintenance and operation are simple, the operation investment is low, and the concentration of suspended solids and nutrients in the sewage can be effectively reduced, and the sewage can be effectively purified. The disadvantage is that the treatment of organic matter and resistant substances is not very good. Anaerobic biological treatment:

1.Anaerobic tank: By controlling the oxygen content in the sewage, the oxygen in the sewage is too low, so as to catalyze the decomposition of organic matter and achieve the purpose of treating sewage.

The advantage is that the treatment effect is good, and the treatment effect of organic matter and resistant substances is good, which can effectively reduce the concentration of suspended solids and nutrients in sewage. The disadvantages are that the equipment investment is high, the operation requirements are high, and the oxygen content of the sewage needs to be strictly controlled. 2.

Anaerobic anoxic reactor: Treating sewage through anoxic reactor can effectively remove organic matter.

Answer]: C anaerobic microorganisms, especially methanogens, are more sensitive to anti-slip toxic substances. The main advantages of anaerobic biological treatment are the reduction, recovery of bioenergy and high load.

Aerobic organisms.

BAI treatment is in the presence of free oxygen.

DU (molecular oxygen) is present under the strip of zhi, aerobic microorganisms reduce the organic matter and make it version.

Stable and harmless treatment methods. The advantages are that the reaction speed is faster, the wastewater retention time is shorter, so the volume of the treatment structure is smaller; Less odor is emitted during processing; Decomposes the degradable organic matter completely, etc. The disadvantages include low removal rate of refractory organic matter, more sludge than anaerobic treatment, and higher operating costs.

Anaerobic biological treatment is to convert most of the organic matter into simple small molecule organic matter and inorganic matter such as methane under the action of transgenic anaerobic bacteria and facultative anaerobic bacteria under oxygen-free conditions, so that the sewage can be purified. The advantages include high organic matter removal rate, low sludge volume, and low operating costs. The disadvantages include a long residence time of wastewater, incomplete decomposition of organic matter, and a lot of odor.