Biochemical system auxiliary device and application thereof

Abstract

The invention discloses a biochemical system auxiliary device. The biochemical system auxiliary device comprises a power supply controller, insulation tubes, and at least two parallel positive and negative electrodes and/or zero, one or multiple pairs of positive and negative fuel cell electrodes; each electrode comprises a tank body, electrode pore plates vertical to a water inlet direction are inserted in the tank body, at least three rows of electrode pore plates, which are made from piezoelectric/contact alloy, are arranged at a sewage feeding end, and at least twenty rows of electrode pore plates, which are made from rare-earth alloy, are arranged at a sewage discharging end; the fuel cell electrodes are mesh-shaped; the power supply controller is respectively connected with the electrodes and the fuel cell electrode. The biochemical auxiliary device not only can perform a high-performance-cost pre-treatment on sewage, but also can culture targeting bacteria online in a biochemical system; a fuel cell can eliminate charge accumulation toxicity of the biochemical system, so that the biochemical system efficiently and stably runs, the digestion ability to COD is improved by more than two times, and the biochemical effluent index is improved by more than 50%.

Description

technical field [0001] The invention relates to a biochemical system auxiliary equipment and its application in sewage pretreatment pools, anaerobic pools, facultative pools, aerobic pools and biochemical sludge concentration pools, belonging to the technical field of environmental protection. Background technique [0002] At present, the most cost-effective sewage treatment method is biochemical treatment. The process is: ① use the reproduction and replication of microorganisms to convert them into organic matter (microorganisms containing carbon, hydrogen, nitrogen, oxysulfur, phosphorus and a small amount of inorganic salts are marked as A), ② and / or Or digested by the metabolism of microorganisms, emitted in the form of heat, and / or release biogas (methane, nitrogen, carbon dioxide, hydrogen sulfide, volatile acids, etc. are marked as B), ③and / or absorbed by microorganisms (polysaccharides secreted by microorganisms It will selectively absorb the refractory organic matte...

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Problems solved by technology

[0004] That is to say, the load actually removed by the biochemical system (in terms of COD) is only part B. Generally, the biochemical system of domestic sewage is relatively small, with only primary sedimentation tanks and aerobic tanks, which generate less heat and biogas, and the remaining sewage The amount of mud accounts for more than 80% of the total load (in terms of COD). The industrial sewage of the chemical industry is difficult to degrade. Although the biochemical system is large, the heat and biogas output are not large, and the amount of biochemical residual sludge accounts for the total load ( Calculated by COD) about 70%; in the biochemical system of industrial enterprises using natural animals and / or plants as raw materials, the amount of heat and biogas generated by anaerobic is relatively large, and the amount of biochemical residual sludge accounts for the total load (calculated by COD) About 60%, except for microbial pharmaceuticals (antibiotic production enterprises), because the traditional antibiotic sewage biochemical system is only aerobic, resulting in more than 80% of the total biochemical sludge load (calculated by COD)

[0005] Composting of excess sludge is recognized in the industry as a very good sludge treatment method. Due to various factors, biochemical excess sludge that meets composting standards is pitifully small; the safest treatment method is incineration to reduce the amount and then landfill. It can be seen that: ①The activated sludge method of sewage treatment also has fatal defects: a large amount of biochemical residual sludge has caused a huge burden to the production enterprises, society and human living environment; Accumulation, the increase of conductivity affects the osmotic pressure of microorganisms, and / or charge accumulation, affects the process of biochemical reactions, and / or organic nitrogen, and / or nitrate nitrogen, and / or ammonia nitrogen, and / or organic phosphorus, and / or Or total phosphorus, and / or cyanide, and / or hydrogen sulfide, and / or heavy metals, etc. make sewage biochemical treatment difficult

[0006] Since the real removal of the load (in terms of COD) can only be "radiated as heat, and / or release of biogas (methane, nitrogen, carbon dioxide, hydrogen sulfide, volatile acid, etc.)" then: ① increasing microbial biomass is the best way; ② At the same time, it is necessary to increase the biodegradability of pollutants, so many industrial wastewaters need pretreatment. However, the current pretreatment methods are double-edged swords, and the cost performance is problematic. Except for secondary pollution, the others are not perfect, but its cost performance is not high, and there are few applications; ③Cultivating targeted engineering bacteria for refractory pollutants can reduce pretreatment costs. Many scientific research institutions are working hard, but there are many links , the interest relationship is complex, because of the huge investment, it is almost impossible to be feasible; ④The biochemical reaction is also an oxidation-reduction reaction. The catalytic effect of rare earth elements on biochemical reactions has been studied, but they are all in the laboratory stage. When the concentration is high, there is biochemical toxicity, how to intelligently control the amount of addition is the key; ⑤There are problems in the principle of electrolytic treatment of sewage: cationic substances are toxic to microorganisms and should be removed as much as possible, but practice has proved that cationic substances and / or other pollutants , exists in the state of hydrated ions in sewage, and electrolysis is only electrolysis of water, and the oxygen and / or chlorine produced have little effect on the decomposition of stable organic nitrogen, organic phosphorus, complex organic matter, benzene and its derivatives, etc., but only It plays the role of modification, and then forms physical sludge through flocculation and precipitation, which serves the purpose of pollution transfer. However, physical sludge is generally hazardous waste, and the disposal cost is very high

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