Design of a small scale secondary wastewater treatment plant

Τίτλος

Design of a small scale secondary wastewater treatment plant

Θέμα

Sewage disposal plants

Sewage disposal plants—Design and construction

Δημιουργός

Papafingou, Panayiota

Πηγή

Higher Technical Institute

Το πλήρες κείμενο είναι διαθέσιμο από το Υπουργείο Ενέργειας, Εμπορίου Βιομηχανίας και Τουρισμού

Εκδότης

Library of Cyprus University of Technology

Ημερομηνία

1991

Συνεισφέρων

Kathijotes, Nicos

Δικαιώματα

Απαγορεύεται η δημοσίευση ή αναπαραγωγή, ηλεκτρονική ή άλλη χωρίς τη γραπτή συγκατάθεση του δημιουργού και κάτοχου των πνευματικών δικαιωμάτων.

Μορφή

pdf

Γλώσσα

eng

Τύπος

text

Αναγνωριστικό

CED 0096

Σύνοψη

In modern societies proper management of wastewater is a necessity, not an option. Pollution is obviously a daily thread, and is our prior duty to protect our selves and the environment in general. Wastewater treatment is a relatively resent undertaking, even though remains of sewers have been found in ancient cities, but the extent of their use for wastewater carriage is unknown.
The first treatment processes were tried in the late 1800s' and early 1900s'. Design of wastewater facilities remained empirical until the middle of the century. Great improvements have been achieved in the last 30-40 years and a wastewater treatment plant is now a fact.
The first processes were based on the self purification capacity of the streams or lakes where the wastewater were used to be discharged. But this unpretreated discharge of wastewater resulted to gross pollution and created great health problems. Nowadays, wastewater treatment is considered necessary prior to disposal regardless of the capacity of the receiving waters.
The search for new sources of water is never ending particularly in newly emerging countries. Populations are increasing and nobody wants to carry water from the village pump any more. Therefore, advance wastewater treatment processes are currently being developed that will produce potable water from domestic wastewater.
Wastewater treatment works must not be the ugly ducking in the community, but rather a good neighbour. In the past, odours, dust, noise, erosion, and unsightly conditions created public doubts and uneasiness about the nearby municipal treatment works. It is unacceptable to create new environmental problerns. Therefore future planning and designs of wastewater treatrnent facilities will ernphasize techniques to minimize adverse environrnental impacts and objections by the neighbourhood resident.
Ιn today' s world, companies and governments are working together to keep our environment clean. Each year, great investments are made in equipment and legislation. Α battery of carefully controlled tests, performed under laboratory and natural conditions must be performed to assess potential damage before it occurs. These tests should be expanded in all fieds ie for soils , water, plants, air etc. The effects that a wastewater plant product may have in the received streams or in underground water sources is of critical importance.