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Conventional vs. EnviroServer ES System
Conventional Septic Systems      EnviroServer ES System

CLICK for larger image Conventional Septic Systems

The purpose of conventional septic systems is to provide for the treatment of household waste using natural processes. A conventional septic system with an absorption field is the most common method for treating waste from a residence that is not connected to the public sewer.

A typical conventional septic system consists of three main components.

First, waste exits the house via a sewer pipe and enters the septic tank. There, solids settle out and grease and scum float to the top. The septic tank separates and retains settleable and floatable solids suspended in the raw wastewater. Settleable solids settle to the bottom to form a sludge layer. Grease and other light materials float to the top to form a scum layer. The removed solids are stored in the tank, where they undergo liquefaction in which organic solids are partially broken down into dissolved fatty acids and gases. This is the first stage of treatment.

Next, liquid effluent flows from the tank through the distribution box to the absorption area. Finally, the effluent arrives at the absorption field where it is distributed to the soil for treatment. The absorption field is a subpart of the septic system.

The key to a good treatment process is proper management of the entire system, including regular pumping of the septic tank. Conventional septic systems can fail due to lack of maintenance. When a system is inadequately maintained (not pumped on a regular basis), solids build up in the tank, and then flow into the absorption field clogging it beyond repair. Poor percolation, improper design, construction or installation can also cause a system to break down. Common household chemicals such as toilet bowl cleaners may kill the microbes responsible for breaking down the waste can also cause a system to fail. Often times even with proper maintenance, systems fail due to out of date technology. That is why most regulatory authorities require a 100% "set aside," which is land reserved for the purpose of rebuilding the dispersal field.

CLICK to view MST system process demonstration MicroSepTec's EnviroServer ES System

The EnviroServer system is an advanced onsite wastewater treatment system, which is defined as an onsite treatment system that includes components different from those used in a conventional septic tank and drainfield system. An alternative system is used to achieve acceptable treatment and dispersal/discharge of wastewater where conventional systems may not be capable of meeting established performance requirements to protect public health and water resources (e.g., at sites where high ground water, low-permeability soils, shallow soils, or other conditions limit the infiltration and dispersal of wastewater or where additional treatment is needed to protect ground water or surface water quality).

The ES system is a pre-engineered, pre-assembled single fiberglass tank system. The tank is divided into five chambers.

Raw wastewater from the home enters the system. The first chamber is a primary settling tank where solid waste collects on the bottom. The chamber is sized to hold sludge for one to three years depending on the usage of the system. The first baffle is structurally reinforced to be able to withstand the hydraulic pressure of the first compartment being empty and the second full. As the settling takes place, the water becomes clearer and as more water enters the system, it overflows into chamber B.

The primary clarified wastewater overflows into the chamber B and underflows into chamber C. At the base of the chambers B and C are air diffusers that create fine air bubbles, which allow for the aerobic digestion of waste. Unlike most on/off cycling air compressors, our system features continuous-flow compressors for maximum digestion. The EnviroServer ES utilizes a combination of an attached and suspended growth process. The attached film is growing on a biomedia and the suspended growth is created by mixing and recirculating sludge. This combination results in a treatment efficiency that exceeds the individual performance of an attached or suspended growth process.

Chamber C is a continuation of the aerobic process started in chamber B. Wastewater underflows from chamber C to chamber D.

Chamber D is the clarifier where final settling of suspended solids and clarification of the effluent is taking place. It is designed for optimum performance without any chemical addition. To promote denitrification and remove accumulated biomass, the settled solids are recirculated back to the first chamber by a recirculation pump. The recirculation pump is operated by an air-lift action and does not have any moving parts. The EnviroServer ES provides increased residence time in the chamber A for improved denitrification, which may be important in colder climates. The clarified water leaves the treatment system through an effluent filter into chamber E which is the Effluent Storage compartment. The effluent filter protects the effluent storage and the dispersal field from solids carry-over during upset conditions. It is designed to remove all particles larger than 1/16.

The water flowing into chamber E is now very clear and clean. If desired, or required, ultra-violet can be introduced for disinfection of the water prior to surface or sub-surface discharge.

CLICK HERE to view MST system process demonstration.
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