Answer:
B. Biological treatmentBiological treatment is a widely used and effective method for treating wastewater with significant organic content, such as sewage or effluent from certain industrial processes.
Explanation:
Liquid waste containing significant organic components can be rendered harmless through biological treatment. This process involves using microorganisms to break down organic matter in the waste. The microorganisms consume the organic compounds as food, converting them into carbon dioxide, water, and biomass in a process known as biodegradation.Acid treatment and blending in effluent ponds can also be part of the treatment process for certain types of waste, but they are not universally applicable for rendering organic waste harmless. Acid treatment is typically used to neutralize alkaline waste or to precipitate certain metals or contaminants, and blending in effluent ponds can dilute waste but may not necessarily break down organic components effectively.Therefore, the most appropriate answer to the question, given the options, would be:
