Upflow Activated Sludge Biofilm Oxidation Ditch Organic Wastewater Treatment Process and System

Abstract

The invention discloses an up-flow activated sludge biofilm oxidation ditch organic sewage treatment system which mainly comprises a sand filter and a reaction tank, wherein the reaction tank is composed of a plurality of series-connected reaction units; each reaction unit is divided into four reaction regions from bottom to top; and the first reaction region is an anaerobic region, the second reaction region is an anoxic region, and the third and fourth reaction regions are aerobic regions. The invention also discloses a corresponding treatment technique. Compared with the prior art, the system has the advantages of small occupied area, simple equipment, high automation degree, low operating cost and favorable treatment effects (thorough reaction and less generated sludge).

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to an upflow activated sludge biofilm oxidation ditch organic sewage treatment process and a system thereof. Background technique [0002] Since the reform and opening up, a number of sewage treatment facilities have been built in large and medium-sized cities in my country, which have played a significant role in protecting the environment and controlling pollution. With the rapid development of my country's township economy and the improvement of people's living standards, the process of rural urbanization has been greatly accelerated, and a large number of small towns will rise rapidly. In the future, most of my country's population will live in cities and towns. At present, there are more than 17,000 administrative towns in my country, most of which have no drainage and sewage treatment facilities. Moreover, due to decades of economic development, some small and medium-...

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Problems solved by technology

[0004] 1. Many people are needed in the operation process, seven or eight people are needed, and four people are needed for the few, and the salary of the personnel is high.

[0005] 2. The amount of sludge produced is large. Every 10,000 tons of sewage will produce 40-55 tons of sludge. The landfill cost of each ton of sludge is basically about 80-100 yuan, not including transportation costs. Some remote villages and towns cost is higher

[0006] 3. High power consumption, the power consumption per ton of sewage treatment is about 0.4-0.6 yuan

[0007] 4. There are a lot of equipment, many failures, and high maintenance costs, especially for MBR and other processes that use membrane treatment. The treatment membrane needs to be replaced every three or four years, and it costs 400,000 or even millions of yuan

To fundamentally solve the problem, the only way is to build a sewage treatment plant, but for cities where every inch of land is expensive, the problem of land for building plants cannot be solved

[0009] In summary, the average cost per ton of sewage treatment is close to 2.5 yuan, which is a huge expense for sewage treatment plants that process hundreds of tons to one or two thousand tons of water per day. These are the reasons why my country's township sewage treatment plants and even large sewage treatment plants cannot The root cause of the operation is that it can’t afford to use it, resulting in a waste of resources

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