Municipal Wastewater Treatment Plants & Wastewater Management
Objectives of Wastewater Treatment
There are three constituents and interrelated aspects of waste water management.
Treatment of wastewater
Re-use of wastewater (Recycling of wastewater)
Performance criteria for Wastewater Treatment Management System
The ideal system would satisfy all of the following criteria.
Pathogenic organisms should not be spread either by direct contact with right soil or sewage or indirectly via soil, water or food. The treatment chosen should achieve a high degree of pathogen destruction.
The treatment process should yield a safe product for re-use, preferably in aquaculture and agriculture.
In those cases land the should be considered exception when the waste cannot be re-use, the discharge of effluent into a surface water should not exceed the self-purification capacity of the recipient water.
The degree of odor release must be below the nuisance threshold. No part of the system should become aesthetically offensive.
The methods chosen for waste collection, treatment and re-use should be compatible with local habits and social (religious) practice.
The skills required for the routine operation and maintenance of the system components must be available locally or are such that they can be acquired with only minimum training.
Capital and running costs must not exceed the community’s ability to pay. The financial return from re-use schemes is an important factor is an important factor in this regard.
Waste Water treatment Processes
Municipal wastewater is primarily organic in content and a significant number of industries including chemical pharmaceutical and food have high organic waste load. This means that the main treatment processes are geared towards organic removal. In a typical treatment plant, the wastewater is directed through a series of physical, chemical and biological processes each with specific waste load reduction task. The tasks are typically.
Conventional Wastewater Treatment Plant Processes
Municipal Wastewater Treatment
Conventional treatment or conventional mechanical wastewater treatment is the term used to describe the standard method of treatment designed to remove organic matter and solid from solution. It comprises four stages of treatment.