ASSIGNMENT HELP ON AUTOMATIC LIQUID WATER TREATMENT PLANT

Introduction

1.1 General

Man’s search for pure les titer began is prehistoric times. In olden days most of the community settlements throughout the world were made near springs, takes and rivers fromwhere the water supply for drinking and irrigation purposes was obtained. Wastewater is essentially the water supply of the community after it has been fouled by a variety of uses. The water supplied to a community receives a range of chemical substances and microbial flora during its use such that the wastewater acquires a polluting potential and becomes a health and environmental hazard. Communicable diseases of the intestinal tract can be spread from uncontrolled disposal of waste water, and therefore prevention of communicable diseases and protecting public health attracts the primary objective of sanitary waste water disposal. Increase in quantity of wastewater reduces the availability of pure water thus creating problem of water scarcity in the areas. We noticed that our college is also facing a problem of water scarcity. When we discussed this with our management , we came to know that the area where our college is situated facing a general issue on the same. Pure water is hardly available in this region. So we thought it will be a better to implement a waste water treatment plant in our college in order to solve this problem. The treated water can be used for flushing, gardening and a portion is directly sent to the Recharging wells thereby increasing the water table.

This proposal will not only become beneficial to college,but also adds more knowledge on academics. So we decided to do a project based on " Waste Water Treatment Plant in SIMAT ".

1.2 Objectives
1. Testing of waste water
2. Design of treatment plant
3. Alternative source for water scarcity
4. Treatment of sludge
5. Reuse the treated waste water
6. Estimation
7. Keep the environment clean and tidy

Literature Review

As per the literature survey conducted made descriptions about various water treatment plants in different hospitals:
Amala Medical College Thrissur :
• 10 Lakh capacity.
• SWT Plant.
• 45 to 50 % water is recycled daily.
• Large plant .Reactors also used in the plant.
• They got award from PCB(Pollution Control Board) for two times for the best water treatment plant in kerala.
• Sodium Hypo Chloride is used for disinfection.
• Daily backwash for two times.
Mimm’s Hospital Kottakal:
• 1.5 Lakh capacity.
• SWT plant and a RO plant used.
• The treated water is used for toilet flush.
• Biogas plant situated.
• Sludge driyer used.
• Sodium Hypo Chloride is used.
Other Visited Places
• Indus avenue Thrissur:

3

AUTOMATIC LIQUID WATER TREATMENT PLANT

– STP Plant of about 45000 Litre day capacity.
• Fish factory Peringode.
– ETP Plant of about 1.5 lakh capacity.
• Edappal Hospital

2.1 Overview of WWTPS

• Physico-Chemical Processes Physicochemical processes and includes coagulation/flocculation, sorption, filtration, sedimentation/flotation, oxidation, and air stripping.
• Activated Sludge and Other Aerobic Suspended Culture Processes Suspended growth processes, including activated sludge and sequencing batch reactors, and encompasses modeling, microbiology, nutrient removal, system design and operation, oxygen transfer, and solids separation.
• Biological Fixed Film Systems Trickling filters, rotating biological contactors, and submerged biofilm reactors.
• Anaerobic Waste Treatment Processes Anaerobic processes and includes sludge treatment, waste treatment, mathematical modeling, and microbiology.

• Natural Treatment and Onsite Processes Treatment technologies that utilize natural processes and/or passive components. It includes wetland systems, other aquatic systems, and onsite systems.

• Disinfection and Antimicrobial Processes Disinfection and antimicrobial processes and includes disinfection methods, microbiology and disinfection chemistry, analytical methods, disinfection byproducts, and distribution systems/regrowth and biofilm.

• Gaseous Emissions from Wastewater Facilities Gaseous emissions from wastewater facilities and includes quantification and measurement; olfactory odor reception, odor and gas sensors; sources; control methods; modeling; odor case studies; physicochemical treatment; and biofilters and biotrickling filters.

• Modeling, Instrumentation, Automation, and Optimization of Wastewater Treatment Facilities Relating to wastewater treatment innovations in the areas of modeling, instrumentation, automation, and optimization of wastewater treatment.

• Health Effects Associated with Wastewater Treatment, Disposal, and Reuse Health effects associated with wastewater treatment, disposal, and reuse. Dept. of Mechanical Engineering. 4 SIMAT , Vavanoor

2.2 History of waste water
Wastewater is any water that has been adversely affected in quality by anthropogenic influence. It comprises liquid waste discharged by domestic residences, commercial properties, industry, and agriculture and can encompass a wide range of potential contaminants and concentrations. In the most common usage, it refers to the municipal wastewater that contains a broad spectrum of contaminants resulting from the mixing of wastewaters from different sources. Treatment of wastewater is a relatively modern practice. While sewers to remove foul-smelling water were common in ancient Rome, it was not until the 19th century that large cities began to understand that they had to reduce the amount of pollutants in the used water they were discharging to the environment. Despite large supplies of fresh water and the natural ability of water to cleanse itself over time, populations had become so concentrated by 1850 that outbreaks of life-threatening diseases were traced
to bacteria in the polluted water. Many ancient cities had drainage systems, but they were primarily intended to carry rainwater away from roofs and pavements. Since that time, the practice of wastewater collection and treatment has been developed and perfected, using some of the most technically sound biological, physical, chemical, and mechanical techniques available. As a result, public health and water quality are protected better today than ever before. The modern sewer system is an engineering marvel. Homes, businesses, industries, and institutions throughout the modern world are connected to a network of below- ground pipes which transport wastewater to treatment plants before it is released to the environment. Wastewater is the flow of used water from a community. As the name implies, it is mostly water; a very small portion is waste material. At a typical wastewater plant, several million gallons of wastewater flow through each day – 50 to 100 gallons for every person using the system. The amount of wastewater handled by the treatment plant varies with the time of day and with the season of the year. In some areas, particularly communities without separate sewer systems for wastewater and runoff from rainfall, flow during particularly heavy rains or snowmelts can be much higher than normal.