- 24 May, 2025
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| Designation: |
Principal Scientist
|
| Email Id: | p_manekar[at]neeri[dot]res[dot]in |
| Qualification: |
B.E.(Civil Eng.), M.E.(Env Engg) |
| Specialization: |
-
|
| Address: |
Sub-Vertical 3B: Waste Water Management, NEERI, Nagpur
|
| Biodata: |
| Sr. No. | Project Name |
|---|---|
| 1 |
Study on Pollution Status of River Daman Ganga and Development of Pollution Abatement Strategies for Rejuvenation of the River System
|
| 2 |
Pollution Status Assessment of Yenamadurru Drain and Feasibility Study for Establishment of Common Effluent Treatment Plant(s) for Industrial Clusters to meet Statutory Norms for Marine Discharge
|
| 3 |
Development of Process package for re-engineering the existing effluent treatment facility to meet capacity expansion and environmental compliance at Security Paper Mill, Hosangabad
|
| 4 |
Technical Appraisal of Newely Established Effluent Treatment Plant based on Zero Liquid Effluent Discharge for Textile Wastewater of M/s Innovative Textile Ltd at Butibori, Nagpur
|
| 5 |
Design of basic engineering package for sewage treatment plant at security paper mill at Hishangabad, MP
|
| Sr. No. | Publication Name |
|---|---|
| 1 |
Feasibility of bioengineered two-stages sequential batch reactor and filtration
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 m3 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. |
| 2 |
Water conservation through implementation of ultrafiltration and reverse osmosis system with recourse to recycling of effluent in textile industry
In compliance with the protection of the drinking water source in one of the state capital of India, a cluster of small scale textile industries implemented membrane processes based on treatability studies for recovery of boiler feed water quality with recourse to effluent recycling/reuse. The paper addresses to a case study in one of the textile units on upgradation of a full scale effluent treatment plant comprising chemical, biological, tertiary and advanced treatment processes. Based on the adequacy assessment of chemical and biological processes, improvement in the performance of the unit processes were achieved through optimization of coagulant dosage for chemical coagulation and build-up of active biomass in the activated sludge system. In addition, application of membrane separation processes comprising ultrafiltration and reverse osmosis units are also highlighted including disposal of reverse osmosis (RO) rejects through evaporator leading to zero liquid effluent discharge. The treatment scheme implemented resulted in conservation of around 55% of fresh water demand for industry. |
| 3 |
FAHP ranking and selection of pretreatment module for membrane separation processes in textile cluster
Recent development in membrane manufacturing and extensive application of membranes in effluent treatment has opened up a new water resource. The effluent pretreatment module plays a critical role in membrane performance. Appropriate selection of conventional and advanced pretreatment modules in membrane separation processes (MSP) is significant to the success of zero effluent discharge (ZED). This study addresses performance assessment of eight conventional and advanced pretreatment modules implemented for wastewater management in a textile cluster in South India. The comparative pollutant reduction, capital, operation and maintenance (OM) cost of pretreatment modules are discussed. The ranking and interdependence of the pretreatment modules were analyzed through fuzzy analytical hierarchy process (FAHP) with MATLAB software. The pretreatment module IV ranked third with a composite weight of 15.46%. The integrated study of performance assessment and FAHP resulted in an optimum pretreatment module IV comprising the sequence of chemical precipitation, bio-oxidation processes (activated sludge processes) followed by chemical precipitation, to achieve the ZED. This study provides a techno-economically feasible solution for selection of an effective pretreatment module for MSP in the textile cluster. |
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