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LAKE RESTORATION USING MICRO ALGAL TECHNOLOGY

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Mainath Lake – Uttar Pradesh
CSR Project involving Chemical Free bio-remediation of contaminated lake in remote village near Aligarh in U.P, India.
Mainath is a small village situated in the vicinity of Aligarh in the Indian state of Uttar Pradesh. With a population of less than 2000 people, Mainath does not have any proper sewage treatment facility. What’s worse, most of the households do not even have toilets. Untreated sewage and run-offs from the fields accumulate in a lake of between 1 to 2 acres in size. When Phycolinc tested the lake for contaminants, we found that the contamination levels in the lake was 50% more than the contamination levels of raw sewage. Not only that, but because of seepage, the lake was also contaminating the ground water in the vicinity of the lake.

We have employed an algae based product made of selected local micro algae and customozed micro nutrients and treated the polluted lake. This eliminated the algal bloom forming nuisance algae and established a food chain restoring the lake within a short period. The major parameters like COD, BOD and coliform bacteria were reduced by more than 90% resulting in transparent water.

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Mausam River – Malegaon
India’s first successful river bio-remediation exercise with 90% reduction in contamination levels and results visible over 10 km stretch.

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Malegaon is a small city near Nasik in Maharashtra with a population of a little over 500,000. There is no Sewage Treatment Plant in the city, owing to which, the entire untreated sewage of 75 MLD is drained directly into the River Mausam. There is one large industrial unit there in Malegaon which is engaged in bleaching and mercerizing of gray fabric. Semi-treated, industrial effluent of 1.5 MLD capacity is drained directly into the River Mausam.
River Mausam is a seasonal river flowing through the heart of the city of Malegaon. Owing to a barrage just before the River enters the city, the river almost has no fresh water except during the rainy season.
After flowing for almost 10 – 12 kms through the entire city of Malegaon, the river Mausam merges into the River Girna, which eventually merges into the River Tapi.
Phycolinc commissioned a reputed 3rd party lab from Nashik which is both NABL and FASSI accredited to independently collect samples of the river from 3 different locations:

  1. Dyane Bridge (with just industrial effluent and no sewage)
  2. Mausam Bridge (after sewage entry)
  3. Chandanpuri Bridge (10 kms downstream of inoculation point, after meeting River Girna)

Before any treatment, The Report of waste water parameters of Mausam River are as below

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INTERVENTION IN MALEGAON :

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The industry in Malegaon was producing effluent with following characteristics:

  1. pH :               13
  2. COD :               3000 ppm

The industry was spending close to Rs.2 Cr per annum in neutralizing their effluent from pH – 13 to pH-8. Owing to the presence of Poly Vinyl Alcohol (PVA) in the industry’s effluent, the Activated sludge process based ETP was not working smoothly and continuously getting disturbed and due to this effluent with High COD and BOD was being directly discharged in into the River on frequent basis which was causing environment damage.
Phycolinc was commissioned by the textile industry to do the following:

  1. Correct the industry’s effluent’s pH from 13 to 8 automatically without chemicals
  2. Reduce the effluent’s COD to less than 300 ppm
  3. Bio-remediate the portion of the river flowing in front of the industry so that aesthetics improve, the smell reduces and locals stop complaining.

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PERC setup a phycoremediation plant for treating the industry’s effluent. The pH was corrected without chemicals to 8, saving Rs. 1.25 cr per year for the industry. The COD was reduced to less than 300 ppm.
The phycoremediation plant doubled up as an algal inoculum manufacturing setup.  The micro-algae harvested was stabilized and added to beneficial, organism specific, organic micro-nutrients and then let out into the river.
The following changes were observed in the river after 3 weeks of treatment.
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Apart from the above quantitative parameters which improved significantly, there was a significant drop in smell in the entire city.
Following is the map of river and location of samples collected.
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The way forward
The initiative which was jointly undertaken by PERC and the industry in Malegaon was a huge success. Its impact is visible in an entire city of 500,000. The initiative directly impacts the Bottom of the Pyramid population, several of whom are dependent on the river for their bathing/washing needs. The initiative also provides a template for the National Mission for Clean Ganga and other such river bio-remediation activities.

WORLD'S FIRST PHYCOREMEDIATION PLANT

World's First Phycoremediation plant: Dr V Sivasubramanian, has set up the First Phycoremediation plant at SNAP Industry. Algal remediation technology helps in pH correction of the acidic effluent and complete reduction of sludge formation. SNAP is now a zero disposal company. The phycoremediation plant has been in operation from September 2006. The effluent generated by the industry is highly acidic and of very high TDS (40000 mg/L). The entire effluent is evaporated using slope tank with zero sludge formation. The algal biomass produced is used in Biofertilizer preparation and sold by the Company. .......(.more )

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Click here for a news item in Deccan Chronicle

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Contact Us

For consultancy on algae based remediation, bio-fuels and CO2 mitigation and algal biomass production

Dr V Sivasubramanian, Director

Phyco Spectrum, 52 A, A K Block, 7th Main road, (click here for location map), Anna Nagar, Chennai 600040, India. Email to: vsivasubramanian@gmail.com. Phone: 91 044 26208896. Mobile: 91 9677144453 ;

MAP: https://goo.gl/maps/N9TZJY1XNSv