Treatment of wastewater, sludges, organic waste, excreta 270 topics
 
				
		
		
		
		
		
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								Sub-categories																
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| Systems focusing on anaerobic processes, e.g. UASBs, anaerobic baffled reactors, digesters with animal manure (DEWATS now in separate sub-category) 
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| Composting 22 topicsComposting processes for treatment of sludges, excreta, wastewater in piles, boxes or similar (but not composting toilets which are in the sub-category on toilets) | ||
| Septic tanks (conventional or upgraded) 22 topics | ||
 
			 
			 
			 
			 
			 
			 
			