WO2019186586A1

WO2019186586A1 - A system for treatment of sewage water

Info

Publication number: WO2019186586A1
Application number: PCT/IN2019/050248
Authority: WO
Inventors: Rajiv KABRE
Original assignee: Kabre Rajiv
Priority date: 2018-03-29
Filing date: 2019-03-27
Publication date: 2019-10-03

Abstract

A system and related method to treat the sewage water is disclosed. The sewage treatment system comprises of combination of techniques which aids to remove solid particles, suspended and dissolved contaminants using different chambers i.e. reaction chamber containing black sand, coarse sand with black culture, retention chamber containing coarse sand and carbon chamber contacting activated carbon, leading to purification of the sewage water. The dimensions of the scoop unit can be varied depending upon capacity and flow rate of the plant. The scoop unit also has a drop area around 1- 2 feet based on the capacity of the plant, in which the culture which has reacted with the contaminants in the sewage water settles down which does not move further. The treated water can be directly used for gardening, or let out into the open drains, and can be treated and used in flushing units, firefighters, and construction purposes.

Description

A SYSTEM FOR TREATMENT OF SEWAGE WATER

Technical field of the Invention

The present invention relates to water treatment systems. More particularly to a sewage water treatment system and method that removes solids, organic contaminants, pathogens and the like from the sewage water which is stored in the storage tank using scoop system which can be used for agricultural purposes, industrial purposes and domestic purposes and so on.

Background of the Invention

The wastewater treatment is a process used to convert wastewater which is not suitable for use into an effluent that can be either returned to the water cycle with minimal environmental issues or reused. Treatment involves removing impurities from the wastewater. The wastewater generally comprises of high amounts of organics, silica, boron, hardness, suspended and dissolved solids etc. which have to be removed to make the water fit for several recreational process.

The process like oil and petroleum recovery, industrial operations, pesticide treatments produce water which includes high concentration of contaminants in it making it unfit for further use. If such contaminant water is to be used in any processes and applications, then it has to be completely purified using a series of processes. Some of such process include steam generation which evaporates the contaminant water which significantly reduce the hardness, removes the dissolved solids and organics and also reduce the silica present in the contaminant water. Other processes which are commonly used in the water treatment process includes phase separation process to transfer the impurities present in the wastewater or sewage water into a non-aqueous phase which can be easily separated, sedimentation to remove the solids and non-polar liquids from the sewage water with the help of gravity and density separation, filtration to remove the colloidal suspensions and the particles present in the sewage water through the sieves and oxidation process to reduce the biological oxygen demand of the wastewater to reduce the toxicity of some impurities which can be done using chemical oxidation or bio-chemical oxidation etc.

The convention method of sewage water treatment comprises of series of steps in treatment of the sewage water including sand filter, carbon filter, transfer pump, blowers and pressure pumps etc. The system involving these components is more expensive and also hard to set up the system. Currently the processes used in wastewater treatment includes reverse osmosis and other related processes which removes the suspended solids and the dissolved toxic elements to make the water free from the toxic substances and purified. But all these processes which are used are not sufficient to treat the water which is produces by the household and the industrial plants. The increasing number of the industries in the urban areas, requires the development of an economical and easy to scale up process which can treat large amount of sewage water.

Therefore, there is a need for an economical process for treating sewage water that reduces the suspended solids, organics, silica, toxic elements and hardness in the sewage water or the wastewater.

Objectives of the Invention The primary objective of the present invention is to provide a process of treatment of sewage water to convert the sewage water into purified water which can be used for different processes.

Another objective of the present invention is to provide a process of treatment of sewage water where the solid particles separation is carried out through the solid trap, to separate the plastic bottles, napkins etc., from sewage water. Another objective of the present invention is to provide a process of treatment of sewage water where the water is treated using the stone, sand and carbon setup chambers along with useful bacteria to remove the contaminants and make the treated waste water odorless and transparent, which is carried without any use of electricity, thus making the system economical.

Summary of the Invention The present invention describes the system and the process to treat the sewage water involving various techniques to obtain purified water that can be used for several recreational purposes. The system and method for the treatment of sewage water comprises of combination of techniques to remove the solid particles from the water, to remove the suspended and dissolved contaminants in the water and to purify it using black sand, coarse sand, stone and activated carbon along with bacterial layer. The present invention describes the process which is used in treatment of sewage water. The sewage water is directly passed through a chamber containing the solid trap which removes the solid particles from the water where the solid particles get trapped in the mesh like structure which is present in the chamber. The water which is free from the solid particles is then passed through the chamber comprising of sand and stone mixture which is coated with the sodium bi carbonate and bacterial culture. The anaerobic bacteria which settles on the black sand removes the organic waste and nutrients from the waste water. The sodium bicarbonate in combination with aqueous calcium carbonate is used to facilitate the growth of culture and also helps in increasing the pH of the waste water to some extent. The water which goes through this chamber loses almost all the contaminants present in it and then purified water along with the black culture enters the next chamber comprising of the coarse sand. Here the black culture is retained in the coarse sand allowing the water to flow ahead. This system also removes any unreacted waste water.

The water then flows into the next chamber comprising of carbon (large sized coal). The carbon removes any coloring matter and adsorbs any smell producing compounds thus making the water pure and fit for secondary use. The purified water is then stored in a separate clean tank which has to be maintained well so that the water does not get impure again due to bacterial and algal growth. The present invention provides a protocol which uses multiple techniques for decontaminating sewage water in a single system, thus optimizing the process of sewage water treatment. Brief description of the drawings

FIG 1 describes the top view of the system which is used in the treatment of sewage water which comprises of naturally designed solid trap and the Scoop system.

FIG 2 describes the plan and flow design of the sewage water through the sewage water treatment plant. Detailed description of the Invention

The system and the process of the present invention comprises of combination of techniques to remove the solid particles from the water, to remove the suspended and dissolved contaminants in the water and to purify it using carbon.

FIG 1 describes the top view of the system which is used in the treatment of sewage water which comprises of naturally designed solid trap and the Scoop system. Referring to FIG 1, in a first embodiment, the sewage water treatment system is preferably formed as a single enclosed unit. As will be described in detail below, the sewage water treatment system provides various techniques for decontaminating sewage water contained within the single system, thus optimizing the decontamination of the sewage water.

The present invention discloses a scoop unit whose dimensions can be varied depending upon the flow rate set at the sewage treatment plant, whose construction is described below. The scoop unit comprises of:

1. Sand and stone scoop: In this first chamber, the flow is bifurcated and at the same time the dissolved contents in the waste water are consumed by the microbiological bacteria (i.e. Black Culture) which are embedded in the sand scoop and the stone facilitates the equal distribution of the waste water by providing enough time for contact of the bacterial culture and the dissolved material in the waste water. The black culture consumes the waste matter from the water and then their growth multiplies. In this first scoop, the waste water is nearly 80 % clean.

2. Coarse sand scoop: The water entering the second chamber from the first chamber mainly consists of 80% purified water and black culture. In this system, the culture is retained in the coarse sand and helps in further purification of the waste water. Hence the water coming from the sand scoop becomes around 90% clean.

3. Carbon scoop: In this section, the water comes in contact with large sized carbon and during their interaction, the color and the awful odor is adsorbed and almost eliminated.

4. Storage tank: The water then enters and is stored in this tank which has a depth of 6 foot and with little addition of urea the water is supplied to garden and vegetation or with adding sodium hypochlorite the water can be directed to the flushing unit and also it can be let outside into the open municipal drains.

The scoop unit is followed by a drop area which is can be 1 foot to 2 foot based on the capacity of the plant. The culture which is picked up by the sewage water from the scoop unit, settles at the bottom. The culture which has reacted with the impurities in the sewage water increases in size, and the drop area is constructed at a lower height which enables easy settling of the culture at the bottom of the drop unit. A kadappa stone is layered on top of the unit, which can withstand any harsh outer conditions.

FIG 2 describes the plan and flow design of the sewage water through the sewage water treatment plant. Referring to FIG 2, the sewage water treatment is carried out in three chambers i.e. Reaction chamber, Retention chamber and the Carbon chamber. The sewage water which has to be treated is input into the solid trap unit, where the solids present in the sewage water such as plastic bottles, napkins etc., present in the sewage water are removed.

The sewage water free from the solids enters the reaction chamber which consists of various sand and cultures combinations such as black sand which are used to treat the sewage water. The reaction chamber comprises of three chambers in order to increase the retention time of the water in the reaction chamber so that the culture which present along with the sand, can remove most of the impurities from the sewage water. The partially treated water from the reaction chamber enters the retention chamber having the coarse sand filling, which removes the culture which culture which is present in the partially treated water and prevents the bacterial culture from moving further to the next unit. The sewage water free from the culture then enters the carbon chamber where the sewage water only passes through the chamber, removing the color and the awful odor from the sewage water. The treated water exits the carbon chamber and is stored in the storage tank, which can be used for various domestic purposes.

The sewage water treatment method of the present invention is used to treat domestic wastewater is applicable for all range of capacities from cum to mlds. The length and breadth of the newly invented STP Design with scoop system will vary with the capacity but the depth of the system will remain constant. The configuration of the sewage water treatment system can be explained in further more detail using the three dimensional images.

Claims

I Claim:

1. A system for treatment of sewage water comprising:

a. a solid trap designed to remove solid such as plastic bottles, napkins and wooden materials, from the waste water;

b. a reaction chamber containing the black sand with culture which reacts with the sewage water to remove the suspended and dissolved impurities;

c. a retention chamber containing a coarse sand filling for further purification of sewage water;

d. carbon chamber with the carbon filling, for removal of the color and odor from the sewage water; and

e. storage unit to store the completely treated sewage water free from solid particles, contaminants and dissolved particles and the color and odor of the untreated sewage water. wherein, the solid trap unit is used to remove the solid particles from the water, the scoop unit i.e. reaction chamber, retention chamber and the carbon chamber are used to treat the sewage water by the combination of techniques for removal of the suspended and dissolved contaminants in the water and purifying it using carbon to convert the sewage water into reusable water and, the storage unit to store the treated water for future use.

2. A system as claimed in claim 1 wherein, the sewage water treatment system is preferably formed as a single enclosed unit.

3. A system as claimed in claim 1 wherein, the process of treatment of sewage water is carried without any use of electricity, making the system economical.

4. A system as claimed in claim 1 wherein, the reaction chamber contains units of sand with black culture and coarse sand unit, where the black culture i.e. the microbiological bacteria consumes the dissolved contents in the waste water which makes the waste water nearly 80 % clean.

5. A system as claimed in claim 1 wherein, the outlet from the reaction chamber enters into the retention chamber containing coarse sand filling which purifies the 80% purified water and black culture for achieving 90% purification.

6. A system as claimed in claim 1 wherein, the outlet from the retention chamber enters the carbon chamber containing large sized carbon which interacts with the 90% purified water which absorbs the color and the awful odor.

7. A system as claimed in claim 1 wherein, the purified water is stored in the storage tank which can be directly used for gardening, or let out into the open drains, and can be further processed by addition of a small amount of sodium hypochloride is added to the sewage water for preventing it from getting decayed, which can be used in the flushing units, and the additional water can be used in the firefighters, and also for construction purposes.

8. The process involved in the sewage water treatment comprising:

a. channeling of sewage water into the solid trap unit to remove all the solids such as plastic bottles, napkins, any wooden materials etc.;

b. channeling the solid free water from the solid trap unit into the reaction chamber containing sand with black culture, in order to eliminate the dissolved contents in the waste water; c. channeling the partially purified waste water from the reaction chamber to the retention chamber containing coarse sand filling in order to retain the black culture as well as to purify the partially treated waste water;

d. channeling the partially purified water from the retention chamber into the carbon chamber containing a large sized carbon in order to eliminate the color and the awful odor from the waste water; and

e. storing the purified waste water in the storage tank, which can be directly used for gardening, or let out into the open drains, and if it is stored in the storage tank, then a small amount of sodium hypochloride is added to the sewage water for preventing it from getting decayed.