Energy-saving type brewery wastewater treatment system

Abstract

The invention provides an energy-saving type brewery wastewater treatment system and belongs to the technical field of industrial wastewater treatment. The energy-saving type brewery wastewater treatment system comprises a raw water collection tank, a hydraulic sieve, an adjusting tank and at least one high-efficiency rotational-flow anaerobic treatment device, wherein a wastewater feeding pipe isconnected to the upper part of the raw water collection tank, a coarse screen right facing the wastewater feeding pipe is arranged in the raw water collection tank, a raw water lift pump is arrangedat the bottom of the raw water collection tank, the raw water lift pump is connected with the hydraulic sieve through a first pipeline, the hydraulic sieve is arranged at the top of the adjusting tank, an anaerobic water feeding pump is arranged at the bottom of the adjusting tank, the anaerobic water feeding pump is connected with the high-efficiency rotational-flow anaerobic treatment device through a second pipeline, and the high-efficiency rotational-flow anaerobic treatment device is respectively connected with a methane recovery mechanism, an internal-circulation reflux mechanism and a water discharging pipe. The energy-saving type brewery wastewater treatment system disclosed by the invention has the advantages of concise process, good treatment effect, environmental friendliness and energy conservation.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and in particular relates to an energy-saving beer wastewater treatment system. Background technique [0002] my country's beer production has ranked first in the world for many years in a row. In recent years, the annual increase of beer production has exceeded 14%, and the beer industry has entered a stage of rapid development. However, beer is a major emitter of wastewater and pollutants in the brewing industry, and the water consumption of domestic beer manufacturers is generally 10-20m 3 / t beer, the water consumption of better manufacturers is 8-12m 3 / t beer. According to statistics, beer wastewater accounts for 1.3% of the total industrial wastewater discharge in the country, and COD discharge accounts for 0.5% of the total COD discharge of industrial wastewater in the country. [0003] According to the source, beer wastewater can be divided into two categories:...

AI Technical Summary

Problems solved by technology

At present, most breweries mix the wastewater from each strand and treat them together. The water quality index of the mixed wastewater is generally pH: 5-6, COD Cr : 2500-3500mg / L, BOD 5 : 1500-2000mg / L, SS: 600-1200mg / L, TN: 25-85mg / L, TP: 5-7mg / L, which belongs to medium-concentration organic wastewater. The wastewater itself is non-toxic, but contains a large amount of organic matter, which is biodegradable Well, if it is directly discharged into the natural water body without treatment, it will easily cause the water body to lack oxygen, resulting in black and smelly water quality

[0004] The common domestic beer wastewater treatment system has the following main problems: (1) The discharge standard is backward. The current "Beer Industry Pollutant Discharge Standard" (GB19821-2005) first-level discharge standard limit is: pH: 6-9, COD Cr : 80mg / L, BOD 5 : 20mg / L, SS: 70mg / L, NH3-N: 15mg / L, TP: 3mg / L, with the increasingly serious pollution trend of major receiving water bodies in my country, this series of limit values ​​can no longer meet the discharge requirements

(2) The process route is long, and the typical beer wastewater treatment process is: grille + primary sedimentation tank + regulating tank + anaerobic reaction tank + contact oxidation tank + secondary sedimentation tank + advanced treatment

This route has a long process, involves a lot of equipment, needs multiple upgrades, and complex operation management

(3) The operation of the anaerobic treatment device is unstable. The main pollutants of beer wastewater are organic matter. For higher concentrations of organic matter, the efficient operation of the anaerobic treatment system is the key factor to ensure that the effluent is stable and up to standard. The anaerobic treatment system currently in operation in China Most of the reactors have various problems, such as: uneven water distribution, excessive rising flow rate, difficult formation of granular sludge, and serious sludge loss; with the operation of the equipment, the temperature and pH value in the reactor are low, and the anaerobic reaction Insufficient, anaerobic bacteria are not active; anaerobic reactor biogas production is insufficient, the concentration is low, and there are many impurities, which cannot be effectively used

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