onsite sewage facility造句

• In virtually all engineered onsite sewage facilities, recycling and decomposition by natural organisms is still the primary mechanism of sewage disposal.
• This has been proposed as a solution for onsite sewage facilities in subsistence agriculture economies where hand labor is the most abundant.
• Due to the incomplete state of decomposition, when removed from an onsite sewage facility, these solids are typically referred to as " sludge " rather than " compost ", and have powerful offensive odors arising from the microorganisms still consuming nutrients in the sludge.
• Although the solids collected by onsite sewage facilities can potentially be used as compost to build topsoil, these solids are often incompletely decomposed due to either a lack of onsite storage space to wait for decomposition ( municipal facilities ), or because the solids are being stacked in a layered structure of new waste solids on top of previously decomposed solids ( septic tanks and outhouses ).