Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Restoration of Urban Blue Acres_Nualgi Pyco-remediation of sewage and lakes

83 views

Published on

Restoration of Urban Blue Acres

Published in: Government & Nonprofit
  • Be the first to comment

  • Be the first to like this

Restoration of Urban Blue Acres_Nualgi Pyco-remediation of sewage and lakes

  1. 1. Nano Silica based Micro nutrient For Phyco-remediation of Sewage, Lakes, etc., Using Diatom Algae
  2. 2. Phyco-remediation • Bio-remediation : use of bacteria. • Phyto-remediation : use of plants. • Phyco-remediation : use of Algae.
  3. 3. Types of Micro-Algae • Cyano-bacteria / Blue Green Algae. • Green Algae • Diatom Algae • Dinoflagellates • Coccolithophores, etc.
  4. 4. Diatoms vs Other Phytoplankton – based on our observation and various studies. Diatoms • Require less light, due to their silica cell wall (10% to 25 % of dry weight) . • Are consumed by zooplankton and fish, hence do not accumulate in tanks and lakes. • Less dead algae so less decomposition by bacteria • Consume less CO2 at night. • Perhaps use C4 photosynthesis Other Phytoplankton • have cellulose cell wall and hence less efficient, since light does not pass thru cellulose. • Cyanobacteria are not consumed by zooplankton and fish and accumulate in tanks and lakes. • Dead algae is decomposed by bacteria • Consume more CO2 at night. • Use C3 photosynthesis
  5. 5. Photosynthesis Photosynthesis requires 16 inputs : • Sunlight, Carbon dioxide, water, • Nitrogen, Phosphorus, Potassium (N P K) • 10 micro nutrients – Iron, Zinc, etc. In addition to these, all terrestrial plants use Silica and Diatom Algae require silica for their shell.
  6. 6. • Nualgi is a product to deliver ALL 10 micro nutrients required by plants and Diatom Algae. • The micro nutrients are adsorbed onto nano silica and sold as liquid in 500 ml and 1 liter bottles.
  7. 7. Water pollution and agriculture productivity • Excess input of nutrients, Nitrogen and Phosphate, into lakes is polluting them, the nutrients come from fertilizer run off from fields, sewage, animal dung, detergents, etc. • Farmers use excess amounts of N P K fertilizer but not enough of micro nutrients. In many countries N P K fertilizers are subsidised but micro nutrients are not. • This has resulted in an nutrient imbalance in waterbodies and agriculture.
  8. 8. Uses • Nualgi can be used in all waters - polluted lakes, - sewage treatment plants, - intensive aquaculture ponds - Oceans, etc. • In agriculture, Nualgi Foliar Spray provides plants with all 10 micro nutrients required and also silica.
  9. 9. Schematic diagram of the process triggered by Diatoms provide oxygen to Aerobic Bacteria which breakdown the organic matter and these are consumed by the Diatoms and these by zooplankton and these by fish.
  10. 10. Raj Path, Delhi Pond before and after treatment • Before - about 125 meter of the pond is covered with Algae. • The pond is now clear of algae after 3 weeks
  11. 11. Dabki Lake, Uttarakhand
  12. 12. Bahadurpur Lake, Uttarakhand
  13. 13. 1 MLD Sewage Treatment Plant, Bangalore, Raw Sewage Bar screen Oil skimmer Eq tank Anoxi c Aeration MBR Permeate Treated water pump LED Lights Nualgi dosage (mL/d) 175 25 25 25 Tank volume (L) 300,000 37,800 506,000 54,000 376,000
  14. 14. 1 MLD Sewage Treatment Plant, Bangalore, India - Results Parameter Before Nualgi After Nualgi Ammonia <0.5 mg/L <0.5 mg/L Nitrate 104 mg/L 23.4 mg/L Alkalinity 154 mg/L 238 mg/L pH 7.1 7.0 BOD <3 mg/L 4 mg/L COD <10 mg/L 10 mg/L Electricity 16,200 kwh / month 2,025 kwh / month
  15. 15. Laksar Drain, Uttarakhand • 16 km long drain from Laksar town to River Ganga, in Haridwar Dist of Uttarakhand • Flow is about 200 MLD. • Mainly sewage, some industrial effluent, irrigation water runoff, etc. • Demonstration project under InSitu Bioremedation initiative of National Mission for Clean Ganga was given in November 2018. • All targets were achieved. • Cost was Rs 1,842 per MLD.
  16. 16. Laksar Drain, Uttarakhand, India Under Namami Gange project Parameter Outflow before treatment Outflow Target Outflow after Treatment Target % reduction Actual % Reduction BOD 61.3 mg/L ≤ 30 mg/L 8.3 mg/L 40% 86.4% COD 380 mg/L ≤ 150 mg/L 33.1 mg/L 40% 91.2% TSS 242 mg/L ≤ 100 mg/L 20 mg/L 40% 91.7% DO 1.2 mg/L ≥ 5 mg/L 6 mg/L - - pH 7.7 6.5 to 9.0 7.72 - - Fecal coliforms 2,730 MPN/100 mL 118 MPN/100 mL Diatom density 23.5 cm2 x 104 cells 58.6 cm2 x 104 cells
  17. 17. BGA and Diatoms in a beaker before and after use of Nualgi • With Blue Green algae • BGA floats and Diatoms sink
  18. 18. Thank you M V Bhaskar Kadambari Consultants Pvt Ltd www.nualgilakes.com nualgi@gmail.com 92465 08213

×