A 14 mgd wastewater treatment plant has a primary clarifier that treats an influent with 800 mg/L of solids and a removal efficiency of 55%. Sludge at the bottom of the tank is pumped at a rate of 0.1 mgd. What is the effluent solids concentration from the clarifier (in mg/L)? b. What is the solids concentration in the sludge at the bottom of the tank (in mg/L and%)? c. The primary sludge is further processed in a digester following treatment. What weight of solids (in lbs) need to be handled each week? а.

A 14 mgd wastewater treatment plant has a primary clarifier that treats an influent with 800 mg/L of solids and a removal efficiency of 55%. Sludge at the bottom of the tank is pumped at a rate of 0.1 mgd. What is the effluent solids concentration from the clarifier (in mg/L)? b. What is the solids concentration in the sludge at the bottom of the tank (in mg/L and%)? c. The primary sludge is further processed in a digester following treatment. What weight of solids (in lbs) need to be handled each week? а.

Sustainable Energy

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ISBN:9781337551663

Author:DUNLAP, Richard A.

Publisher:DUNLAP, Richard A.

Chapter14: Ocean Thermal Energy Conversion And Ocean Salinity Gradient Energy

Section: Chapter Questions

Problem 20P

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Concept explainers

Integrated Solid Waste Management

Integrated Solid Waste Management (ISWM) is a thorough waste suppression, compost, removal and recycling Program. An effective ISWM system considers how to suppress, manage and recycle solid waste in a manner that is most efficiently to protect human health and the surrounding. ISWM system requires evaluation of public wants and demands and then selecting and merging the most effective waste management activities for the proposed demands. The main ISWM activities for solid waste management are Waste prevention, Recycling and Composting, and Combustion and Removal and waste collection in a properly planned, constructed, managed and mitigated landfill areas. Each of these requires careful designing, financing, accumulation, and delivery of activities.

Question

A 14 mgd wastewater treatment plant has a primary clarifier that treats an influent with 800
mg/L of solids and a removal efficiency of 55%. Sludge at the bottom of the tank is pumped at
a rate of 0.1 mgd.
1.
What is the effluent solids concentration from the clarifier (in mg/L)?
What is the solids concentration in the sludge at the bottom of the tank (in mg/L and %)?
The primary sludge is further processed in a digester following treatment. What weight
of solids (in lbs) need to be handled each week?
а.
b.
с.

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