drenaaiväljak

A drenaaiväljak, which translates to "drainage field" or "leach field" in English, is a crucial component of a decentralized wastewater treatment system, commonly found in areas not connected to a municipal sewer. Its primary function is to safely dispose of and treat effluent from a septic tank or other onsite treatment unit.

The process begins with pre-treated wastewater, typically from a septic tank, flowing into the drenaaiväljak. This field consists of a network of perforated pipes laid in trenches filled with gravel or other aggregate. As the effluent slowly seeps out of the pipes and into the surrounding soil, a natural biological process occurs. Microorganisms present in the soil consume and break down remaining contaminants in the wastewater. The gravel and soil act as a natural filter, removing suspended solids and further purifying the water.

The success of a drenaaiväljak depends on several factors, including soil type, depth to groundwater, and proper system design and installation. Soil with good permeability allows for efficient effluent dispersal and treatment, while impermeable soil can lead to system failure and potential groundwater contamination. Regular maintenance of the septic tank is also essential to prevent solids from overloading the drenaaiväljak and reducing its lifespan. In essence, the drenaaiväljak acts as the final stage of onsite wastewater treatment, returning clean water to the environment.