Method for performing reusing treatment on recycled water

Abstract

The invention discloses a method for performing reusing treatment on recycled water. The method comprises the following steps: (1) washing quartz sand with water, drying, soaking in a hydrochloric acid aqueous solution, washing with water and drying; (2) preparing an SJ material and water into a mixture; (3) mixing the mixture and the quartz sand uniformly, placing, drying, washing with water and drying to obtain a modified quartz sand filter material; (4) filling a filter column with johnstonotite, anthracite and the modified quartz sand filter material sequentially from bottom to top; (5) putting potassium permanganate into secondary effluent of a sewage treatment plant, stirring, adding polyferric sulfate and carrying out a reaction; (6) adding sewage obtained in the step (5) into the filter column obtained in the step (4), filtering and back-washing when the filtering speed is less than 30 m / h. According to the method, the occupied area is reduced, the investment cost is reduced, the operating process is simplified, and the main index of the water quality of the treated effluent reaches the requirements of 'Water Quality Standard of Water for Urban Sewage Recycling Landscape Environment' (GB / T18921-2002).

Description

technical field [0001] The invention relates to a method for recycling treatment of regenerated water, belonging to the technical fields of water treatment and resources and environment. Background technique [0002] Nowadays, the shortage of water resources seriously restricts the sustainable development of the country, and the reuse of reclaimed water is one of the effective ways to solve the crisis of water resources. However, the treatment process for reclaimed water reuse is still immature, and most of them still use the simple splicing of water supply treatment units without overall optimization. The distribution of treatment objects and treatment efficiency at each stage is unreasonable. The coagulation-sedimentation-filtration process occupies a large area and has a long process flow, which has caused problems such as complex management, high infrastructure investment and high operating costs. In addition, the effluent after filtration often requires a post-membrane ...

AI Technical Summary

Problems solved by technology

However, the treatment process for reclaimed water reuse is still immature, and most of them still use the simple splicing of water supply treatment units without overall optimization. The distribution of treatment objects and treatment efficiency at each stage is unreasonable. The coagulation-sedimentation-filtration process occupies a large area and has a long process flow, which causes problems such as complex management, high infrastructure investment and high operating costs. In addition, the effluent after filtration often needs to be followed by a membrane process, which is costly, difficult to manage, and easy to damage

[0003] In addition, the traditional filtration process for reclaimed water reuse treatment often has low filtration rate, low surface load rate, requires a large area, high construction cost, high operating cost, and large dosage

At the same time, the filter material is very important in the filtration process. Among them, quartz sand plays a pivotal role in the filtration due to its superior condition and performance. Negative charge, which makes it not very effective in removing certain toxic substances, bacteria, viruses and organic matter in water treatment