Septic tank (huàfènchí) is a device for treating excrement, filtering and settling it. Its principle is that the solidified substance decomposes at the bottom of the pond, and the upper hydrate enters the pipeline and flows away, thus preventing the pipeline from being blocked and giving the solidified substance (garbage such as feces) enough time to hydrolyze. Septic tank refers to a small treatment structure that precipitates domestic sewage and anaerobically digests sludge.
Extended data:
First, the role of septic tanks
Septic tank is a basic sludge treatment facility and a pretreatment facility for domestic sewage. Its functions are as follows:
1. Ensure the environmental sanitation of the living quarters and avoid the spread of domestic sewage and pollutants in the living environment.
2. Kill mosquitoes and fly eggs in the anaerobic working environment of septic tanks.
3. Temporary storage of sludge, anaerobic corruption of organic sludge, and mature organic sludge can be used as agricultural fertilizer.
4. Pretreatment (primary treatment) of domestic sewage, which precipitates impurities and hydrolyzes macromolecular organic substances into small molecular organic substances such as acids and alcohols, thus improving the subsequent sewage treatment.
Second, the process flow
Septic tank is a treatment equipment that uses the principles of sedimentation and anaerobic fermentation to remove suspended organic matter from domestic sewage. A baffle is arranged in the high-efficiency corrugated FRP fertilizer device, and the holes on the baffle are staggered up and down, so that short flow is not easy to form, and the whole lower tank body is divided into three parts; A primary anaerobic chamber, a secondary anaerobic chamber and a clarification chamber, wherein the bottoms of the primary anaerobic chamber and the secondary anaerobic chamber are communicated, and MDS special filler is added inside.
This separation reduces the contact time between sewage and sludge, so that acid fermentation and alkali fermentation do not interfere with each other. At the same time, the existence of filler increases the contact surface area between sewage sludge and anaerobic bacteria, which greatly improves the reaction efficiency.
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