Wastewater pretreatment flow distribution and separation technology for removing particle solid pollutants

Abstract

The invention discloses a wastewater pretreatment flow distribution and separation technology for removing particle solid pollutants. The wastewater pretreatment flow distribution and separation technology comprises the following steps that firstly, wastewater is collected by a drainage pipeline and automatically flows into a smooth flow residue removing, sand settling and mud falling mechanism; secondly, the pretreated wastewater enters a pH value regulating tank, and the pH is regulated to be 6-9; thirdly, then the wastewater automatically flows into a coagulating tank, wherein the effective dosage of a coagulating agent is 20-50 mg / L; fourthly, a wastewater flow guiding groove suction filtration mechanism is used for flow distribution pretreatment; fifthly, then the wastewater is sequentially fed into a facultative hydrolysis tank, a primary aerobic contact oxidation tank, a delayed biochemical tank and a secondary aerobic contact oxidation tank by a water pump for secondary biochemical treatment, and tail water meeting the standard after precipitation and reverse multi-filtration treatment is recycled or automatically flows to a wastewater drainage pipe network. By means of the technological process, after the pretreatment flow distribution technology, the COD of the wastewater can be reduced by 50-60% or above, the subsequent treatment load is greatly relieved, and it can be ensured that the SS of outlet water stably meets the standard.

Description

technical field [0001] This invention is a divisional application for an invention patent with the patent number ZL201210430845.5 and the name "sewage pretreatment diversion process", which relates to the field of sewage treatment, and specifically relates to the sewage pretreatment diversion and separation process for removing larger particles of solid pollutants . Background technique [0002] All kinds of sewage contain a large amount of larger particles and suspended solids that are difficult to settle, some are difficult to biodegrade, and some are biodegradable but have become macromolecular cluster structures, which will bring a lot to the subsequent biochemical treatment of sewage. Great difficulty, these difficult to remove larger particles and difficult to settle suspended solids in sewage, increase COD (chemical oxygen demand), greatly increase the burden of follow-up treatment, need to prolong the biochemical time, increase the volume of the functional pool, and ...

AI Technical Summary

Problems solved by technology

[0002] All kinds of sewage contain a large amount of larger particles and suspended solids that are difficult to settle, some are difficult to biodegrade, and some are biodegradable but have become macromolecular cluster structures, which will bring a lot to the subsequent biochemical treatment of sewage. Great difficulty, these difficult to remove larger particles and difficult to settle suspended solids in sewage, increase COD (chemical oxygen demand), greatly increase the burden of follow-up treatment, need to prolong the biochemical time, increase the volume of the functional pool, and Increased energy consumption and increased operating costs