Business Areas / Environmental Solutions

Overview

Water Treatment

This is a service provided by  Good Earth Chemicals Pvt Ltd.

Sewage Treatment

1. Poly Sulpha Sponge (PSS)

PSS is a product created, patented and marketed by M/s Good Earth Chemicals Private Limited. This product added in the extended aeration tank will not only reduce the ODOUR 100% but also reduce the BOD and COD 75%-85% with-in 6-8 hours. If the product is administered with reduced aeration time, it will not just reduce the space requirement, but will also significantly reduce the capital investment for STP/ETP. This reduced aeration time will also save the power consumption of the STP/ETP significantly. The product also eliminates foaming.
water-treatment
Sewage and Wastewater Treatment by PSS technology

  1. Poly Sulpha Sponge (PSS) Technology for effective sewage and Wastewater treatment:

“Poly Sulpha Sponge” is a macro molecular complex impregnated to suit the aquatic environment.  End product is a fullerene, having different elements in addition to Fe2++ to Fe3+++.  Poly sulpha sponge confers high energy in the molecular complex, it is free. (-ve) Ion for instant reaction with gases like H2S, SO2 & NO2 as well as virus, algae and fungus media. It detains strong all above both gram (+ve) and gram (-ve) also reduces the   e-coils counts, which are anti-resistant to drugs like Gentamycin and Tetracycline substantially.

Specific gravity 4.2
% of Moisture < 0.2%
Size Specifications(% passes through – 300#) > 98.0
Colour Brownish red colour
Absorption capacity program of product 2500 ppm of H2S
Foreign Materials < 0.2%

The Poly sulpha sponge media is manufactured with a physical size of – 300 # to facilitate more surface adsorption capability for H2S,SOX and the NOX in Wastewater.

        1)  Primary Treatment:

  • Bar Screen:

Raw Sewage from the source is usually received into the bar screen chamber by gravity. Screen shall be provided to remove all floating and big size matter such as plastic bottles, polythene bags, glasses, stones, Fish Skin etc., which may otherwise choke the pipeline and pumps.

  • Oil & Grease Trap:

      The treated water from Bar screen Chamber is collected into the Oil & Grease Trap where

Oil & Grease present in the wastewater is removed by the Belt Type Oil Skimmer

mechanism. The treated water from Oil & Grease trap is collected into the Equalisation tank

by Gravity.

  • Equalisation Tank (Civil Construction):

Any biological system needs constant feed for bacteria to work efficiently. Hence, it is important to put an equalisation tank to collect the excess flow during peak hours and feed Sewage in lean hours. A typical equalisation tank has a capacity of 6-8 hours of average flow rate. For mixing, and to avoid solids from settling, air shall be bubbled in the equalisation tank through a grid placed at the base of the tank. The equalised wastewater is pumped at a uniform and constant rate for further treatment.

2) Secondary treatment:

  1. PSS reactor fitted with the diffused aeration and PSS dosing.
  2. Secondary Treatment:

The Sewage water from Equalisation tank is pumped to aeration tank, where poly sulpha sponge is 20mg/litre added. This Poly Sulpha Sponge generates hydroxyl radicals in wastewater in Presence of Oxygen. These hydroxyl radicals have higher oxidation potential so it will oxidise the organic matter present in the Sewage water. When organic matter will decrease BOD, COD levels automatically decreases. The treated water from aeration tank is taken to secondary Settling tank for the separation of solids & liquid. The clear water overflow from the Settling tank is taken to the Filter Feed tank. The water from filter feed tank is pumped through a pressure sand filter (PSF) for removal of particulate matter. The treated water from Pressure Sand filter is fed into the Activated Carbon filter where color & Odor is removed. The treated water from Activated Carbon filter can be used for gardening & toilet flushing.

3) Tertiary Treatment:

The treated water from Secondary Settling tank is taken to filter feed tank where chlorine is dosed for microorganism’s disinfection. From filter feed tank the water is pumped to the pressure sand filter.

 

  • Pressure Sand Filter:

A typical pressure sand filter consists of a pressure vessel – this could be either vertical or horizontal-fitted with a set of frontal pipe work and valves, graded sand supported by layers of graded under bed consisting of pebbles and silex, a top distributor to distribute the incoming water uniformly throughout the cross section of the filter, and an under drain system to collect filtered water. In pressure sand filter raw water flows down wards through the filter bed and as the suspended matter is removed. There is steady rise in the loss of head as the filtration process continuous and the flow reduces once the pressure drop across the filter is excessive.

  • Activated carbon Filter:

The treated water from Pressure sand Filter is taken to Activated Carbon Filter. Carbon is a substance that has a long history of being used to adsorb impurities and is perhaps the most powerful adsorbent known to man. One pound of carbon contains a surface area of roughly 125 acres and can adsorb literally thousands of different chemicals. Activated carbon is carbon which has a slight electro-positive charge added to it, making it even more attractive to chemicals and impurities. As the water passes over the positively charged carbon surface, the negative ions of the contaminants are drawn to the surface of the carbon granules.

  • Sludge Treatment

Sludge from the PSS tank & Secondary Settling tank shall be transferred to the Sludge holding tank. The sludge is pumped under high pressure to a filter press for de-watering of the sludge. The filtrate from the filter press is taken back to equalisation tank. The de-watered sludge shall be disposed off as per the regulatory norms.

Filter Press Operation

Plate and frame filter presses are de-watering machines which utilise pressure (60-80 psi, typically) to remove the liquid from a liquid-solid slurry. They are particularly suited for low solids (<2% solids), or solids composed of fines (-200 mesh), however they will essentially dewater many combinations of particle size distribution and percent solid slurries. The diagram at left, shows the basic operation of a plate and frame filter press. The feed enters the press at the bottom of the plate, using a pump suitable for pumping up to 80-90 psi. Then, the feed travels the path of least resistance (up bewteen the filter plates), which has filter media inserted between the plates, and the void between the plates is filled with the slurry, as the liquid passes through the filter media, and travels up to the outlet port at the top of the plate. This liquid is referred to as the “filtrate”, and is discharged from the press. The solids remain in the void between the plates, until the plates discharge the filtered solids.

5) Treated water reservoir: for secondary applications like gardening, toilet flush, floor cleaning etc.

6) UF and RO: for treating the water for Recycling for cooling tower and other industrial application

How PSS technology is unique:

  • Will reduce the ODOUR
  • Will generate Hydroxyl radicals
  • Will act as flocculent
  • Will reduce BOD,COD substantially
  • Will reduce the E-coli and pathogen growth
  • Will reduce the sludge generation
  • Will augment the oxidation process

In 8 hours time  only one PSS reactor itself.

Poly sulpha sponge technology is basically a chemical reaction to activate the surface adsorption mechanism to remove poisonous gases from water to eliminate the Odour nuisance and at the same time augmenting biological process.

How can hydrogen sulphide will cause ODOUR nuisance and will affect human health also will reduce the equipment life span?

Exposure to low concentrations of hydrogen sulphide may cause irritation to the eyes, nose, or throat. It may also cause difficulty in breathing for some asthmatics. Brief exposures to high concentrations of hydrogen sulphide (greater than 500 ppm) can cause a loss of consciousness and possibly death. In most cases, the person appears to regain consciousness without any other effects. However, in many individuals, there may be permanent or long-term effects such as headaches, poor attention span, poor memory, and poor motor function. No health effects have been found in humans exposed to typical environmental concentrations of hydrogen sulphide (0.00011–0.00033 ppm).

In your body, high H2S can damage multiple systems, including the central nervous system, the heart, and the liver. Much of the available information on H2S poisoning relates to inhalation in industrial settings, which can also damage the lungs.

According to the U.S. government’s Agency for Toxic Substances and Disease Registry, chronic exposure can cause: Low blood pressure Headache ,Nausea ,Loss of appetite ,Weight loss ,Ataxia (poor coordination, staggering gait) ,Eye-membrane inflammation ,Chronic cough ,Neurological symptoms ,Psychological disorders .

A) Odour nuisance is eliminated:

The poly sulpha sponge under aeration conditions will absorb the volatile H2S from the sewage water and hence the ODOUR nuisance is eliminated.The dissolved sulphide in the waste water is in equilibrium with the hydrogen sulphide in gaseous form. The hydrogen sulphide  is  emitted  from  the  waste water surface of  ETP/CETP    and the environment  becomes  odorous due to  hydrogen sulphide  causing objections  from the public .   Poly sulpha sponge has the tendency to adsorb sulphide in the aqueous phase and lowers the hydrogen sulphide in the atmosphere well within the limit

B) The poly sulpha sponge also generates Hydroxyl radicals which is Nutrient to the bacteria:

Iron moieties in poly sulpha sponge generate hydroxyl radicals from molecular oxygen. The hydroxyl radicals have high oxidation potential ( +2.33 V) compared to molecular oxygen. Thus hydroxyl radicals have tendency to oxidise many of the organic compounds in waste water. Thus, treatment of waste water takes place at low hydraulic retention time compared to biological treatment.

C) E-COLIs reduced by PSS:

Poly sulpha sponge also limits the E-coli growth by lysing them on the surface of the chemical.

Microbial performance of Poly sulpha sponge Reactor

Organism Reactor
Influent Effluent
Total coliform 3.1 ×108 1 ×105
Fecal coliform 2.4 ×107 2.9 ×104
Heterotrophic plate count 9.9 ×108 2.4 ×105
Nitrifying bacteria 2.3 ×105 6 ×102
Escherichia coli 1.2 ×107 2.1 ×104
Denitrifying bacteria 2.2 ×104 8.2 ×102
Shigella 12 3
Pseudomonas 2.4 ×105 2.0 ×103
Bacillus 3.1 ×104 2.7 ×103
Streptococcus 2.4 ×105 2.0 ×103
Staphylococcus 2.8 ×105 2.8 ×103
Proteaus 1.9 ×104 4.8 ×102

D) Pathogenic Organisms are controlled by PSS:

The pathogenic organisms in waste water are inactivated due to non availability of nutrients.  The inactivated pathogens are immobilised by the network structure of the   Poly sulpha sponge Thus, the pathogenic bacteria count in waste water is lowered.

E) The iron content in the treated water is also within the permissible limits:

The iron in the poly sulpha sponge is coordinately bonded to acrylate ligands. The firm bonding of the ferric ion with acrylate groups prevent the leaching of iron into waste water

F) Poly sulpha sponge speed up the oxidation process in the aeration tank:

Poly sulpha sponge has tendency to convert the molecular oxygen into hydroxyl radical which has high tendency to oxidise the organics in waste water.  Thus the oxidation process in the aeration tank is well facilitated compared to conventional biological systems.

G) Poly sulpha also reduces the sludge generation.

Poly sulpha sponge containing waste water treatment depends only on the  oxidation of organics in waste water by generated hydroxyl radical and thus sludge generation is very less compared to  conventional biological treatment  techniques  where  molecular oxygen is used  as a source of oxidant for  bacterial  metabolism resulting  in  huge sludge generation.

The analysis results of sewerage water treatment studies under taken by VTU, Davangere on PSS technology are as follows.

Trial 1: Location of the sample collected: Hospet municipal sewerage

Date: 27/02/2014 : Hospet municipal sewerage, Karnataka Aeration time: 8 hours
Parameters Raw PSS treated
Odour objectionable odourless
colour greenish Clear water
Ph 6.2-6.5 6-6.8
TDS, mg/l 1971 1300*
Chlorides ,mg/l 121.16 81.02
Sulphides,mg/l 17.6 0.8
COD,mg/l 512 56
BOD,mg/l 154 26

COD reduction =89.07 %, BOD reduction =83.11 %, Sulphide reduction =93.18%
 

 

*indicates only the removal of organic solids, in mg/l
 

Trial 2: Location of the Sewerage sample collected: Hospet municipal sewerage, Karnataka

Date: 28/02/2014 Aeration time: 8 hours
Parameters Raw PSS treated
Odour objectionable odourless
colour greenish Clear water
Ph 6.6 6.8
TDS, mg/l 1770 1488
Chlorides ,mg/l 202 186
Sulphides,mg/l 11.2 BDL*
COD,mg/l 606 76
BOD,mg/l 184 33

COD reduction= 87%, BOD reduction=82%, Sulphide reduction=88%
 

*indicates the Below Detectable Level
Trial 3: Location of the Sewerage sample collected: koppal municipal sewerage, Karnataka

Date: 03 /03/2014 Aeration time: 8 hours
Parameters Raw PSS treated
Odour objectionable odourless
colour greenish Clear water
Ph 6.4 6.7
TDS, mg/l 2600 1400
Chlorides ,mg/l 120.16 111.4
Sulphides,mg/l 12.8 0.8
COD,mg/l 432 67.2
BOD,mg/l 136 22

COD reduction= 87%, BOD reduction=82%, Sulphide reduction=88%
Trial 4: Location of the Sewerage sample collected: India bulls, Mumbai

Date: 10 /03/2014 Aeration time: 8 hours
Parameters Raw PSS treated
Odour objectionable odourless
colour Dark green Slight turbidr
Ph 6.6 7
TDS, mg/l 3200 2766
Chlorides ,mg/l 678 604
Sulphides,mg/l 20 BDL*
COD,mg/l 704 104
BOD,mg/l 480 4.5

COD reduction=86%, BOD reduction =99%, Sulphide reduction=80 %
Trial 5: Location of the Sewerage sample collected: Raheja matrix, Mumbai

Date: 12 /03/2014 Aeration time: 8 hours
Parameters Raw PSS treated
Odour objectionable odourless
colour Gray Turbid
Ph 6.5 6.6
TDS, mg/l 1850 1760
Chlorides ,mg/l 396 304
Sulphides,mg/l 1.2 <0.05
COD,mg/l 222.6 51.5
BOD,mg/l 87 9.6


COD reduction=76%, BOD reduction=88%, Sulphide reduction=95.83%
 

2. Sulpha Sponge

SS is a product manufactured, patented and marketed by M/s Good Earth Chemicals Private Limited. This SS sprayed on the solid waste followed by water sprinkling for three applications with 2 hours interval each eliminates the odour 100%. The products proved successful in solid waste generated in textile waste, food industry, poultry waste etc.

Sulpha Sponge is basically invented keeping the H2S emitted continuously from the solid waste piled up in metropolitan cities, in 2 & 3 tier cities and also the industrial campuses.  Sulpha Sponge is able to remove the odour from solid waste within 3 hrs from any solid waste. 1% – 3% Sulpha Sponge to be sprayed on the surface of the solid waste and mix the solid waste mechanically by spraying water to facilitate the chemical to react with the solid waste.  After one & half hour time again repeat only water spraying and in 3 hrs time the odour is eliminated from the solid waste.

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The Sulpha Sponge treatment for removal of H2S from the Tannery waste at Ambur is in progress

 

imagenew12Bad Odour in animal bone waste in Malegaon in Maharashtra
imagenew11The bone waste is odour free after treatment with Sulpha sponge

Specification of sulpha sponge

Specfic gravity 4.2
% of Moisture < 0.2%
Size Specification (% passes through -300#) Brownish red colour
Absorption Capacity Per gram of product 2500 ppm of H2S
Foreign Materials < 0.2%
Effluents Treatment

Assessments of the quality of waste water are made by considering many criteria, such as temperature, dissolved oxygen levels and concentration of organic as well as inorganic compounds. We use Oxidation catalyst to remove BOD, COD, TOC, Sulfide, ammonia and dissolved protein in the waste water.

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