Products and services in both Institutional and industrial applications have been installed by Sri Sharada Associates. The SSA offers superior engineering, design, manufacturing and life-time customer support. Our knowledge and experience is an unmatched resource for our customers.

We cater to the needs of —
  • HOUSING LAYOUTS
  • APARTMENTS
  • INDUSTRIES
  • INSTITUTIONS
  • HOTELS
  • RESORTS
  • BULK DRUG
  • SUGAR
  • PETROLEUM REFINERY
  • SOLVENT EXTRACTION UNITS
WATER TREATMENT
Water treatment means the processes employed to make water more acceptable for a desired end-use. Uses may include as drinking water, for use in industrial processes or to allow discharge into the environment without adverse ecological impact. These processes may be Physical like settlement, Chemical like disinfection or coagulation or Biological like lagooning, slow sand filtration or activated sludge.
 
Clarification
Filtration
Ion Exchangers
RO
Plants
 Clariflocc-
 ulators		  Dual Media  Softeners  Reverse
 Osmosis
 Clarifiers  Active
 D-Carbon		  De
 Alkalisers		  Micro
 Filtration
 Tube Settlers  Iron Removal  DM Plants  Ultra
 Filtration
 Inclined Plate
 Settlers 		 Pressure
 Sand		  Mixed Beds  Nano
 Filtration
 High Rate
 Clarifiers 		 Valveless
 Gravity		  Cat
 Polishers		  Chemical
 Dozing
 Systems
 Lime Soda
 Softening
 Plants		  Horizontal  Condensate
 Polishing
 Units		  Ozonisers
 
Click on the below shown chart for an enlarged view..
 
SEWAGE TREATMENT
Sewage treatment is the process of removing majority of the contaminants from wastewater or sewage and producing both a liquid effluent suitable for disposal to the natural environment and sludge. To be effective, sewage must be conveyed to a treatment plant by suitable pipes and infrastructure and the process itself subjected to regulation and controls. Some wastewaters require different and sometimes specialised treatment methods.

At the simplest level, treatment of sewage and most wastewaters is through separation of solids from liquids, usually by settlement. By progressively converting dissolved material into solids, usually a biological floc which is then settled out, an effluent stream of better purity is produced.
 
EXTENDED AERATION DECANTED INTERMITTENTLY– (EADI)?
Overview
EADI is a fill-and draw activated sludge wastewater treatment system for removing dissolved and suspended organic materials and nutrients. In EADI all the unit operations such as aeration, settling and decanting are achieved in a single reactor, all operations being controlled by means of Controllers.

EADI actually represents a very elementary form of treatment process known as "Continuous Fill and Intermittent Draw". Wastewater added to a reactor is treated to remove undesirable components before being discharged.

The EADI reactor is a self-contained system incorporating aeration and clarification within the confines of a single basin. In EADI, the conditioned biomass is developed and used for further treatment. This enables the EADI system to attain nutrient control without the addition of chemicals.
 
EADI Treatment
SCREENING
The sewage will be taken into a bar screen chamber for removal of floating materials. A manual type coarse and fine bar screen will be provided for separation of floating materials.

EADI REACTOR
The EADI reactor is fixed with level controllers. These level controllers indicate the different cycles like Aeration, Settling and Decanting. The level controllers are fixed at Lower Level, which indicates the Aeration phase, the middle level indicates the Settling phase and the higher level indicates the Decanting phase.

AERATION CYCLE
The sewage, after screening enters the EADI reactor. This is the filling phase, which is a continuous operation. The sewage level rises in the reactor tank and when the level reaches the set lower level of the reactor tank the Blower is switched on automatically and the Aeration starts. During the aeration phase the organic matters are subjected to reaction and they are oxidised into CO2 and Water. Oxygen is provided by blower + diffuser arrangement in the reactor tank. The aeration cycle is on till sewage reaches the pre set middle level.

SETTLING CYCLE
The Aeration cycle is completed when the sewage reaches the set middle level. When the settling cycle starts the blower is switched off and the solids settle.

DECANT CYCLE
The settling cycle is completed when the sewage reaches the pre set next higher level. At this level the Motorized valve provided in the reactor opens automatically and the clear water flows into the Filter Feed tank. The level goes down and reaches the lower level. The Blower switches on automatically starts and the Aeration cycle starts. The EADI Cycle continues.

DISINFECTION
Disinfection of treated sewage is carried out using Hypochlorite solution either in the Filter Feed Tank or after Filtration. For this Hypochlorite tank and dosing pump is provided.

FILTRATION
The treated sewage is then sent for filtration by means of filter feed pumps to the Dual Media Filter and the Activated Carbon Filter for polishing and odor control respectively. The filtered water is reused, after disinfection, for toilet flushing and gardening.
 
EADI BENEFITS
  • Reduced capital cost:
    Single integrated bioreactor concept reduces auxiliary equipment and built-up land requirement.
  • Reduced operating and maintenance costs:
    The high level of automation results in reduced supervision requirements, contributing to lower operating and maintenance costs.
  • Nutrient reduction:
    High treatment efficiency includes biological reduction of nitrogen and phosphorus and reductions of BOD5 and TSS too less than 10 mg/l.
  • Less excess sludge and stabilized:
    Low microbiological loading results in longer sludge age, significantly less excess sludge production, and its stabilization. After heat treatment for pathogens (in some cases directly) the sludge may be used as fertilizer.
  • No odor:
    Aerobic conditions throughout the bioreactor and extended sludge age dramatically reduce the prevalence of odor. Plants can be located in the vicinity of populated areas without any side effect.
  • Modular and flexible design:
    Ensures that plants meeting current needs can be quickly expanded if and when growth demands and even retrofitted into existing tanks.
  • Improved sludge dewatering:
    Extended sludge age improves its structure and mechanical dewatering characteristics.
  • Proven:
    Thousands of plants in operation worldwide.
EFFICIENCY OF EADI
  • Exploitation of metabolic capabilities of various strains is achieved.
  • Bacteria maintain high metabolic rate even in low substrate concentration.
  • Frequent alteration of factors allows enrichment of a variety of microbial strains.
FOCCULATION
 
  • Flocculation is the agglomeration of of coagulated colloids by the introduction of a velocity gradient thereby increasing the chances of inter-particle contact and agglomeration.
  • This is achieved by making the effluent flow in serpentine manner through a pipe with internal baffles.
  • Colloids remain in suspension in the flocculate but they grow in size due to agglomeration.
  • Bigger particles settle faster than smaller ones as setting velocity as setting velocity is proportional to the square of the diameter of particle (Stroke's Law).
  • The agglomeration of particles enables them to settle faster in the next unit, which is the tube settler.
  • Advantages of the coiled pipe flocculate are similar to of a static mixer.
TUBE SETTLER
SHORT SETTING
TRAJECTORY IN
TUBE ARRANGEMENT
LONG SETTING
TRAJECTORY IN
CONVENTIONAL FACILITES
  • In tube settler clarifier, waste water flows upwards through a pack of parallel tubes.
  • Owing to drastic shortening of settling depth by the division of the settling volume into a large number of parallel pipes, settling time is reduced by factors of 8-10 times.
Advantages of SSA Tube Settler
  • Tube settlers clarifier are significantly more compact than their conventional counterparts and hence amenable to a pre-fab Package Design.
  • As step hoppers are provided, sludge removal is possible without the aid of mechanical scrappers.
  • As no mechanical equipment is needed, these systems are maintenance-free.
  • As sludge slides down the Tubes into the underlying hopper, part of the bound water in the sludge is released thereby reducing the water content of the sludge.
  • Eddy currents and solids are eliminated as Tubes arrest wind penetration.
HYBRID ANAEROBIC REACTOR
  • The Hybrid Anaerobic Reactor is a robust unit which removes and stabilizes suspended as well as dissolved organic matter thereby reducing the organic and solids loading downstream units.
  • Effectively absorbs organic surges and thereby acts as an organic load equalizer.
  • In the Reactor, the influent flows upwards through dense granulated anaerobic sludge blanket. The wastewater trickles through a well-granulated mass of highly active biomass in which organic molecules are trapped and metabolized anaerobically. Anaerobic blankets are normally transplanted from similar installations to expedite stabilization of the reactor.
  • Colloidal solids are physically trapped and subsequently solubilized through the secretion of eco-cellular enzymes thus facilitating their entry into the microbial cells.
  • Organic matter is converted into organic acids and thereafter methane gas.
  • Wastewater then flows upwards through a cross-fluted media attached biofilm zone for further polishing of effluent organics, storage of gas and its release at the desired pressure.
Safety devices and accessories include scrubbers (optional), flame traps, condense traps, vacuum breaker and pressure relief valves, proximity switches and audio / visual alarms, gas pressure and flow measurement devices.
SUSPENDED GROWTH AEROBIC PROCESSES (SGAP)
Entire range of SGAP options including Sequencing Batch Reactors (SBR), Plug Flow Activated Sludge, Completer Mix, Step Aeration and Step Recycle Sludge Feed, Constant Stabilization, Deep Shaft Aeration , High Rate System, etc.

Stationery media attached growth systems and hybrid systems such as biofilters and activated biodisks.
GRANULAR FILTRATION SYSTEMS
Waste water is passed trough a bed of multiple layers of anthracite and graded quartz sand. Backwash carried out by flow reversal which creates bed expansion and purging of entrapped solids.
 
ADSORPTION
  • Adsorption is carried out on a variety of adsorbants such as activated carbon, marcoporous adsorbent resin, diatomaceous earth etc.
  • Regeneration of carbon is by steam while resin is regenerated by osmotic shock.
MEMBRANE PROCESS
  • Wide range of membrane processes to cater for product water recovery. From household to large-scale industrial applications for resource recovery.
  • Membrane Bio Reactor (MBR) for sewage treatment.
 
SLUDGE DEWATERING SYSTEM
The sludge, totally composted, removed from the reactor tank every two - three months and can be directly used as manure after drying in sludge drying beds. The same also can be cleared using trucks fitted with Vacuum suction pumps.

Mechanical Dewatering: Basket centrifuges, filter presses and vacuum filters.

Solar Dewatering: Intensified solar drying or plain wedge wire trolleys for small application.
 
Click here to enlarge
Click on the above image to enlarge..
 
DESALTING PROCESSES
SSA desalting systems are based on cation-anion exchange / Reverse Osmosis systems for complete demineralization of water / wastewater. These are skid-mounted systems with an optional automation interface.

The Ultimate, heavy duty Reverse Osmosis System equipped with made to order capacity

The Dew model Reverse Osmosis System from SSA is custom built for heavy duty water processing with an awesome processing capacity of catering to varying needs of the industrial & commercial sectors. World class components, state of the art assembling and SSA expertise blend perfectly to give shape to this path-breaking, revolutionary Reverse Osmosis System. It's designed to perfection & designed to be a benchmark of top quality.
Advantage Dew
  • Compact Size
  • Low Maintenance Costs
  • Easy to Operate
  • Available in various Sizes
  • Standard and Modular variants
EFFLUENT TREATMENT
1.   Screening / Grit Removal
2.   Oil & Fat Removal
3.   Flow Equalisation
4.   Primary Sedimentation
5.   Chemical Precipitation
6.   Solar Evaporation
7.   Dissolved Air Flotation
8.   Metal Recovery / Acid Recovery Systems
9.   Effluent Recycle Plants