CEE Oct-Dec 2012

I • Blackening of the treated water over storage forflushing. In the case of commercial and residential complexes, the designers, planners architects, PHE consultants, builders and promoters, water consultants and plant suppliers are individually and jointly responsible for the failure of many STPs. In the name of more vehicle parking and living space, STPs and its operators are pushed underground along with the need of successfully running the plant. In most of these cases, the end users, the residential associations and finally the nature are the victims. The first and foremost challenge is to cultivate right aerobic bacteria in the Aeration Tank, as they are the work force. The main constrains are non availability of fresh air and free movement of air and absence of sun light in all underground STPs. This increases the problem multifold. One knows problems faced by wastewater treatment managers is to develop a suitable Bio-culture for a specific industry like pharmaceutical , agro chemicals, textile dyeing units, oil bearing vehicle washing service centers and leather tanneries and lately for the residential and commercial complexes. Each of these industries has specific problems related to the presence of toxic elements and compounds harmful to the life of bacteria and nutrient deficiency. The two possibilities are, one to remove the toxicity and another to help bacterial to be resistant to toxicity. The removal of toxicity involves identification, quantification and evolvement of processes that de-compose, oxidize, reduce or precipitate these toxic components from wastewater. This is typically carried out as Primary Chemical Precipitation or Advanced Oxidation Techniques using chlorine based compound or hydrogen peroxide. Similarly, chemical adsorbents like powdered activated carbon can be used to absorb the toxic elements. These techniques have limitation in terms of its effectiveness, generation of chemicals sludge, cost effectiveness and the damage that causes to the structure of organic matter that would become food for bacteria in the subsequent biological stages etc. The second option is to use GRG Probiotic Solution, which are four separate formulations, namely GRG Microzyme, Biooxidator, Nutracomplex and Detox. GRG Microzyme has consortia of large number of non-pathogenic, beneficial and native microorganisms in a bio-fixed form and spores form. Cocolith is a natural calcareous matrix rich in oligonutrients, which supports the active growth of biofixed microorganisms. Olignutrients present in the cocolith are CaO, Si0 2 , P 2 0 5 , Fe, Cu, Mn, V, Co, B etc. It also has a blend of enzymes for digestion of carbohydrates, oil and fat and cellulose and lactobacillus to degrade milk , lactose etc. Biooxidator is a Bio-stimulant, Nutracomplex a complex mixture of macro and micro nutrient and detox, the detoxicant. Detoxicant will detoxify effluent to the extent of making the toxic elements and compounds an organic complex. The bacteria do not recognize these complexes as toxic elements and continue to perform its action of bio– degradation of waste. The philosophy of cultivating a culture specific to an effluent involves seeding the bacteria from the following sources; a. Existing Activated Sludge from any similar plant treating similar effluent b. GRG Microzyme c. Cyno and photosynthesis bacteria from the atmosphere d. Some strains of bacteria already present in the raw effluent like discharge from the ferment in the pharmaceutical industry, brewery or milk dairy. After stimulation , a specially prepared microbial propagation culture namely, Biooxidator is used to stimulate the aerobic bacterial strains present in the tank. A whole range of aerobic bacteria present in the tank will multiply, which is reflected in the increase in MLVSS (Mixed Liquor Volatile Suspended Solids). The growth will be slow and steady giving rise into light brown to dark brown colour of the Aeration tank. High MLVSS will reduce BOD of influent. The large chunk of Biofloc formation take place and the settling properties of the Biomass improve as well. As the cyno and Photosynthesis bacteria generate nascent oxygen in water, which are powerful oxidizing agent responsible for COD reduction. .)1)00 • BOD Inlet . \ • BOO Outliel I 1000 ~- . \ /\ _...... \.. " \./""\ I \ :coo COOtnlet coo Out\el 150C v \ .. 4