When coming to the decision of installing a wastewater tank, many people become overwhelmed with the vast amount of information available. Holding tanks and septic tanks both provide families and facilities with a space to store their wastewater, but they do have certain differences that can make a major impact on deciding which type of tank you purchase.
A septic tank is used for taking in wastewater from a source, treating it, and then leaching it into the ground through mounds or a field. They have at least 2 chambers; one which allows for the sewage to separate, and the second which acts as a pumping chamber. The effluent is then leached out into a field or mound where bacteria break it down further. The size of septic tank required is determined by the number of bedrooms in the home, not the number of people; this is because the septic tank must be equipped to service a full household.
A holding tank merely holds sewage; it does not leach away into the ground. The tank has a single compartment and can hold a limited amount of sewage. Then the sewage must be removed by a vacuum truck and sent to a municipal treatment system. As you can imagine, because holding tanks do not process sewage, they need to be serviced much more frequently than septic tanks.