13.-0176. Blue water.

Watsan matters
13.-0175. Blue water footprint.
13.-0174. Blended finance.
13.-0173. Bleach.
13.-0172. Blackwater.
13.-0171. Blackwater ( sewage water ).
13.-0170. Black soldier fly larvae.
13.-0169. Black soldier fly composting.
13.-0168. Bittern.
13.-0167. Biosolid.
13.-0166. Biosand filtration.
13.-0165. Bioremediation.
13.-0164. Biomass.
13.-0163. Biological wastewater treatment.
13.-0162. Biological treatment.
13.-0161. Biological Oxygen Demand - ( BOD ).
13.-0160. Biological Oxygen Demand 5 - ( BOD 5 ).
13.-0159. Biological cycle.
13.-0158. Biological contaminants.
13.-0157. Biogas.
13.-0156. Biogas reactor.
13.-0155. Biogas combustion.
13.-0154. Biofilm.
13.-0153. Biodiversity.
13.-0152. Biodegrading - Biological decomposition.
13.-0151. Biodegradation.
13.-0150. Biodegradable.
13.-0149. Biochemical Oxygen Demand ( BOD ).
13.-0148. Bio-char.
13.-0147. Bio-additive.