Sewage Synchronous Coagulation-Adsorption-Membrane Concentration Recycling Pretreatment Device and Method

Abstract

The invention relates to a sewage synchronous coagulation-adsorption-membrane condensation recycling pretreatment device and method, and belongs to the technical field of water treatment; the device comprises a synchronous coagulation-adsorption mixed unit, a membrane separation concentration unit and a gas recoil control unit; the synchronous coagulation-adsorption mixed unit comprises a water inlet fine grille, a coagulant dosing pool, an adsorbent dosing pool and three water pumps; the membrane separation concentration unit comprises a membrane concentration reaction tank, the reaction tank is provided with a membrane component; the gas recoil control unit comprises an air compressor, an air pressure regulating valve, a controller and an air inlet electromagnetic valve; the method comprises the following steps: raw sewage, a coagulation solution and an adsorption mixed solution are synchronously mixed in a pipeline, then are pumped into a water inlet of the membrane concentration reaction tank for contacting and mixing with a concentrated solution in the membrane concentration reaction tank and inhibiting rapid growth of membrane pollution; sewage mixed with a coagulant and an adsorbent enters into the membrane concentration reaction tank to achieve separation of a clear liquid and an enriched carbon source and gas recoil by the membrane component; and the sewage synchronous coagulation-adsorption-membrane condensation recycling pretreatment device realizes efficient carbon source concentration.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a synchronous coagulation-adsorption-membrane concentration resource recovery pretreatment device and method for urban sewage. Background technique [0002] At present, most urban sewage is treated by the aerobic activated sludge process, because this process has high energy consumption, large structures, and CO 2 Therefore, tapping the potential resources in urban sewage has become an important trend in the development of sewage treatment. Anaerobic technology can convert the main organic carbon source in urban sewage into methane, produce clean secondary energy, and stably enrich nitrogen and phosphorus resources in biogas slurry and residue for agricultural reuse. It is a very promising sewage treatment technology. my country's urban sewage is characterized by low concentrations of organic pollutants, which is not conducive to the advantages of anaerobic ...

AI Technical Summary

Problems solved by technology

[0003] The efficiency of traditional sedimentation or centrifugal concentration is low, and it is difficult to meet the huge demand for urban sewage treatment

In recent years, microfiltration or ultrafiltration membrane technology has been widely used in the field of sewage treatment due to its advantages of fast separation speed, high solid-liquid separation rate and good effluent quality, but the use of microfiltration or ultrafiltration membrane to directly treat urban sewage Concentration will cause serious membrane fouling problems and cannot intercept dissolved organic matter, so the concentration efficiency of sewage carbon source and water treatment efficiency are greatly affected

The chemically assisted backwashing sewage membrane concentration technology disclosed in the article Directmembranefiltrationofmunicipalwastewaterwithchemicallyenhancedbackwashforrecoveryoorganicmatter by S.K.Lateef et al. has achieved certain results, but the auxiliary backwashing of chemical oxidants will consume organic carbon sources and reduce the proportion of carbon sources that can be used for recovery in raw sewage. There are still defects in concentration efficiency

Images