The primary stage of sewage processing involves: Settlement of suspended solids

Question

The primary stage of sewage processing involves: Settlement of suspended solids Reduction of nitrates and phosphates Screening of large solids Bacterial breakdown of sewage Disinfection with chlorine Septic systems can he hazardous because: They cannot decontaminate microorganisms present in human waste. They become clogged frequently and back up into the house. They attract disease vectors such as burrowing rodents. They usually fail after a period of 20 to 30 years, polluting groundwater, All of the above The Love Canal site: Was a notorious toxic waste site in New York State Led to the creation of the Superfund Was repopulated in the 1990s Generated concerns about the health of residents who lived in the area All of the above The term hazardous waste denotes: Materials that are perceived to be of negative value By-products of society that can pose a hazard to human health Introduction into the natural environment by humans of potentially harmful substances, materials, or energy Items that people discard such as yard trimmings, plastics, and glass Water that collects contaminants as it trickles through wastes The term leachate denotes: Materials that are perceived to be of negative value By-products of society that can pose a hazard to human health Introduction into the natural environment by humans of potentially harmful substances, materials, or energy Items that people discard such as yard trimmings, plastics, and glass Water that collects contaminants as it trickles through wastes

Explanation / Answer

36) answer) option c)

Reason : The primary stage aims to remove large materials, which can be composted or shipped to landfills

37) answer) option ) a)

Reason : . Septic tanks cannot decontaminate microorganisms

39) answer ) option d)

Reason : the hazardous wastes are denoted Items that people discard such as yard trimmings, plastics, and glass

Question 38) answer ) option E)

Reason : it was a toxic waste site in US it also led to the creation of superfund

Question 40 ) answer) option A)

Reason : leachate denoted the materials that are perceived to be of negative value

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