Feasibility of bioengineered two-stages sequential batch reactor and filtration-adsorption process for complex agrochemical effluent.
In the present study, the feasibility of a bioengineered two-stages sequential batch reactor (BTSSBR) followed by filtration-adsorption process was investigated to treat the agrochemical effluent by overcoming factor affecting process stability such as microbial imbalance and substrate sensitivity. An air stripper stripped 90% of toxic ammonia, and combined with other streams for bio-oxidation and filtration-adsorption. The BTSSBR system achieved bio-oxidation at 6 days hydraulic retention time by fending off microbial imbalance and substrate sensitivity. The maximum reduction in COD and BOD by heterotrophic bacteria in the first reactor was 87% and 90%, respectively. Removal of toxic ammoniacal-nitrogen by autotrophic bacteria in a post-second stage bio-oxidation was 97%. The optimum filtration and adsorption of pollutants were achieved at a filtration rate of 10 and 9 m(3)m(-2)h(-1), respectively. The treatment scheme comprising air stripper, BTSSBR and filtration-adsorption process showed a great promise for treating the agrochemical effluent.
CSIR-National Environmental Engineering Research Institute, Nagpur 440 020, India. Electronic address: p_manekar@neeri.res.in.
Pravin
P
Manekar
Rima
R
Biswas
Chaitali
C
Urewar
Sukdeb
S
Pal
Tapas
T
Nandy
D000327:Adsorption; D000383:Agriculture; D000388:Air; D000641:Ammonia / Q000302:isolation & purification; D061249:Batch Cell Culture Techniques / Q000295:instrumentation*; D001673:Biodegradation, Environmental; D057005:Bioengineering / Q000295:instrumentation*; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D055598:Chemical Phenomena; D005240:Feasibility Studies; D005374:Filtration; D010084:Oxidation-Reduction; D012015:Reference Standards; D013997:Time Factors; D014865:Waste Disposal, Fluid; D018508:Water Purification
D000641:Ammonia
Agrochemical industry; Air stripper; BTSSBR; Filtration–adsorption process; Multistream effluents