Complex organic sewage step purification process

Abstract

The invention provides a complex organic sewage step purification process, and belongs to the field of wastewater treatment. The process comprises the following steps: pre-removing heavy metals in sewage, electrically driving and inducing sludge micelle particles to settle, carrying out medicament enhanced regulation treatment, carrying out anoxic-anaerobic-aerobic gradient purification, and carrying out related reflux processes. The process has the following advantages: the agglomeration performance of sludge flocculation particles in sewage can be effectively improved, microbial poisoning ina biochemical region is reduced, suspended particles are prevented from blocking a filler layer, and the like. Therefore, up-to-standard discharge of low-biodegradability multi-impurity complex organic sewage is realized efficiently in an energy-saving and low-cost manner, and the process has relatively high application and popularization values.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a complex organic sewage cascade purification process. Background technique [0002] With the rapid development of agricultural technology and livestock and poultry breeding industry, a large amount of organic sewage containing complex pollutants such as antibiotics, heavy metals and suspended particles has been produced. This type of sewage has many technical difficulties such as high chemical oxygen consumption, low biodegradability, high turbidity, and difficulty in separation and sedimentation. In recent years, water pollution incidents caused by antibiotics, heavy metals, high chemical oxygen consumption, and reckless discharge and accumulation of refractory organic substances have occurred frequently. The prevention and control of black and odorous water pollution, organic polluted soil and site restoration have become the focus of environmental researc...

AI Technical Summary

Problems solved by technology

At present, the existing mainstream methods mainly include two categories of "biodegradation method" and "chemical oxidation method". Biodegradation uses the action of microbial flora such as aerobic microorganisms and anaerobic microorganisms to degrade organic pollutants in water bodies. This technology has Low cost, large degradation load of anaerobic bacteria, high efficiency of aerobic bacteria, etc. However, biodegradation technology requires technical prerequisites such as high biodegradable rate of organic matter in wastewater and no biological toxicity in wastewater

The chemical oxidation process is a method to quickly deprive the organic matter of electrons after contacting with the strong oxidant and make it oxidatively degrade to reduce the content of the organic matter in the water body. The chemical oxidation process is a fast and efficient organic wastewater treatment process, but there is a chemical oxidation process. The effective utilization rate of the medium oxidant is low, the process cost is too high to be practically applied, etc.

Especially for the treatment process of organic wastewater with low biodegradability, heavy metal impurities and complex suspended solids, there are often technical problems such as difficulty in the growth of flocculated particles, microbial poisoning in the biochemical area, suspended solid particles blocking the packing layer, and poor biochemical effects of wastewater.

Images