Distributed domestic sewage integrated treatment system and process

Abstract

The invention relates to a distributed domestic sewage integrated treatment system and process. The distributed domestic sewage integrated treatment system comprises pretreatment equipment, regulationequipment, integrated equipment and disinfection equipment which are connected in sequence, wherein the integrated equipment comprises an anaerobic tank, a primary aerobic tank, a primary anoxic tank, an autotrophic denitrification nitrogen removal tank, an adsorption phosphorus removal tank and a filter tank which are connected in sequence. The process has the beneficial effect of deep nitrogenand phosphorus removal. Compared with other similar integrated processes, the process has the advantages that an integrated autotrophic biological nitrogen and phosphorus removal process is adopted, the treatment efficiency on total nitrogen is higher, and the total nitrogen in effluent can be stably reduced to 5-8 mg / L and far exceeds the current emission standard, the anoxic denitrification process section provided by the invention is placed after aerobic nitrification, is different from a treatment mode of firstly denitrifying and then nitrifying and then refluxing nitrified liquid in a traditional denitrification process, and has the advantages of high denitrification efficiency, low denitrification energy consumption and simple process flow.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a decentralized integrated domestic sewage treatment system and process. Background technique [0002] With the rapid development of my country's economy and the acceleration of urbanization, the problem of water pollution is becoming more and more serious. Among them, the prominent problem is that some small and medium-sized cities and rural areas have aggravated pollution trends. The rural population of our country is huge, and the amount of sewage discharge is huge. Most of the sewage is directly discharged into the surrounding water bodies without treatment, which has caused serious harm to the ecological environment. [0003] Compared with centralized treatment in cities and towns, the treatment of decentralized domestic sewage has many difficulties, mainly in the following aspects: 1. The water volume fluctuates greatly. The discharge of scattered dom...

AI Technical Summary

Problems solved by technology

It is often impossible to form a continuous and stable amount of sewage for continuous operation of treatment facilities, especially for facilities using biological treatment processes, it is difficult to form a microbial system with stable performance, and the quality of effluent water is difficult to guarantee

2. Influent water quality is unstable

3. The technical process is single and the treatment effect is poor

Simple ecological treatment process or activated sludge method can no longer meet the increasingly stringent requirements for decentralized domestic sewage treatment and environmental quality requirements

Currently used more A 2 / O or multi-stage AO and other processes that have been maturely applied in the field of municipal sewage treatment, but due to the instability of dispersed domestic sewage water volume and water quality, the effect in the actual treatment process is not ideal

The current decentralized domestic sewage treatment generally has the problem that the effluent of nitrogen and phosphorus pollutants is difficult to meet the standards

The main reason is that the water quantity and water quality are unstable, and it is difficult to form a stable and effective microbial population, especially the cultivation of nitrifying bacteria is particularly difficult; the nitrogen and phosphorus load in the scattered domestic sewage is usually high, and the organic matter in the water is often not enough to support biological nitrogen and phosphorus removal. ; and the method of using external agents, such as carbon sources and phosphorus removal agents, cannot achieve precise adjustment due to large fluctuations in water quality

4. Difficulty in maintenance and management

With the current treatment process, in order to achieve better nitrogen and phosphorus removal effects, it is necessary to add carbon sources or phosphorus removal agents. However, due to the lack of regular maintenance capabilities, it is difficult to achieve accurate dosing of agents, making carbon sources, removal Maintenance of consumable chemicals such as phosphorus agents is more difficult to implement

The dilemma of maintenance and management has further caused the instability of the current decentralized domestic sewage treatment effect

Images