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5.5.2 Off-site Sludge Management
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5.5.2 Off-site Sludge Management

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Many villages may choose to have the sludge hauled away by pump trucks to a regional treatment facility. When sludge is hauled away it is commonly referred to as septage, which has a variable quality that is highly organic with significant levels of grease, grit, hair and debris. A haul-away system usually relies on a vacuum truck or another vehicle equipped with a motorized pump and a storage tank for emptying and transporting septage to a regional treatment facility. If this haul-away system is going to be utilized, it is critical that the treatment system be located and designed so that a vacuum truck can access the site.

 

This approach is fast and generally an efficient mode of management and provides an essential service to unsewered areas. The initial capital and long-term operation and maintenance costs are high due to the specialized equipment. Additional costs depend on the distance between the village and the regional treatment facility.  Accessibility is critical because most vacuum pumps can only suck down tanks that are 2 to 3 meters deep and need to be able to approach within 30 meters from the tank to be pumped. Incentives may be needed for septage haulers so that deposit the sludge at the designated site rather than the nearest river or ravine.

 

 

 

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