Mass-energy transformation treatment process for production wastewater

Abstract

The invention discloses a mass-energy transformation treatment process for production wastewater. The mass-energy transformation treatment process is characterized in that firstly, the treatment process is divided into a pre-concentration aftertreatment process for backwash wastewater of a filter chamber, a treatment process for directly reusing the backwash wastewater of the filter chamber, and a treatment process for mixing and concentrating the backwash wastewater of the filter chamber according to different treatment modes of the backwash wastewater of the filter chamber; and then a complete treatment system composed of three sets of treatment processes is formed according to different operation conditions and requirements. The process has the advantages that the process can adapt to different site conditions and operation requirements; supernate of a concentration pool and dehydration filtrate, which are easy to discharge beyond standards in the production wastewater concentration and dehydration processes are subjected to secondary treatment by virtue of a concentrated mass-energy transformation pool when concentration and dehydration of muddy water discharged by production are solved; the floor area is saved; and the discharge with the standard level of effluent of a sludge treatment process and transformation of organic matters in the production wastewater into an biological energy source to be further recycled are achieved.

Description

technical field [0001] The invention relates to a quality-energy conversion treatment process of production wastewater involved in water supply and drainage engineering, specifically a combined treatment process applied to sludge discharge from sedimentation tanks of waterworks or sewage plants and backwash wastewater from filter tanks. The optimal combination of concentration, dehydration and mass-energy conversion is adopted for the sedimentation tank sludge discharge and filter backwash wastewater, which reflects the reduction and resource recovery of production wastewater. Background technique [0002] The influent water of urban waterworks and sewage plants in China contains a variety of organic and inorganic substances. After the treatment process, most of them are discharged from the process as production by-products and exist in the form of production wastewater. Due to the large amount of production wastewater, the influent water is enriched with pollutants after be...

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Problems solved by technology

The main disadvantages of the above technologies are that the discharge time of production wastewater is generally concentrated and needs to be adjusted and stored; natural drying takes a long time, and the sludge drying effect in rainy seasons is poor; mechanical dehydration has high investment costs and high operating costs. Supernatant and dehydration It is often difficult for the filtrate to meet the discharge standards, and because coagulant aids are generally added during the dehydration process, which affects the disposal of dewatered sludge; more importantly, a large amount of organic matter as pollutants has become an environmental burden again

The improvement of water environment that has arisen in recent years mainly adopts the construction of artificial water body-vegetation environment, such as the invention patent that the applicant has authorized, the application number is "a concentrated mass-energy conversion pool" with the application number of 200610116070.9, which uses the principle of plant absorption and microbial degradation to solidify To remove pollutants such as organic matter in water, but the utilization of biomass energy is not sufficient, and due to the high mud content and low treatment load, it often requires a large area

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