MLD at Noida) was investigated twice in year 2010 and for remaining three STPs (48, one hundred and 152 MLD at Ludhiana), the performance was monitored 3 occasions consecutively for the duration of the year 2010.Analytical procedureMaterials and methodsDescription of STPs and monitoring planAll STPs monitored in this study adopted the sequence of units as screensgrit chambersUASB reactors followed by on the list of 4 post remedy: Final Polishing Unit (FPU) or polishing ponds (PP), and/ or other aerobic post therapy systems (Figure 1). The sludge drying beds, gas holder and dual fuel generators have been prevalent at all STPs beside one gas engine at a STP. The influent flow prices varied from 38 to 152 MLD (million litres per day). The unique STPs configuration and operational circumstances were summarized in Table 1. The performanceGrab samples have been collected from inlet chamber for sewage, UASB effluent at outlet pit, and final effluent from post remedy systems like polishing ponds (PP) or ASP etc. Samples were collected in a single litre plastic bottles and kept in an air tight ice box and transported for the Environmental Engineering Laboratory, Department of Civil Engineering, IIT Roorkee, India. Evaluation of all physicochemical parameters and heavy metals had been produced following the typical strategies [11]. The samples for heavy metals evaluation had been collected into the 500 mL plastic bottles, which were acidified with two mL HNO3, as a way to prevent the adsorption of heavy metals onto the wall of sample container.Final results and discussionSewage characteristicsThe traits of sewage investigated at distinct STPs are presented in More file 1: Figure S1S4. The dataGAS HOLDER SCREENING GRIT CHAMBER CHAMBER FLOW MEASUREMENT DEVICE (PROPORTIONAL WEIR) FEEDER GLSS c BOXEFFLUENT GUTTERSGRITd DFG ROOMUASB EFFLUENTSLUDGE OUTLETSFINAL DISCHARGE TO SUTLAJ RIVERP SEWAGE a MPS SumpPUMPS AT MPSb UASB REACTORAERATION TANKFPUSLUDGE DRYING BEDS a b c d MPS Principal Pumping Station UASB Upflow Anaerobic Sludge Blanket GLSS Gas Liquid Separator Method DFG Duel Fuel GeneratorFigure 1 Schematic of STP method flow diagram (111 MLD Ludhiana).Khan et al. Journal of Environmental Well being Science Engineering 2014, 12:43 http://www.ijehse.com/content/12/1/Page three ofTable 1 Design and style parameters of STPs (UASBPost treatment technique)STPs Saharanpur Agra Capacity (MLD) 38 78 L B D/H (m) 24286.ten 2440 five.25 UASB No. of reactors 4 6 HRT (h) 9.four 9.three Vol. (m3) 15000 30200 L B D/H (m) 12700 m2 1.five m (PP) 214 93 1.six (PP) 130 160 1.six (PP) 123 163 1.60 (PP) Karnal Vadodara Surat Noida Noida Ludhiana 40 43 one hundred 27 34 111 32 24 4.eight 24224.80 20 20 7.44 24 28 6.ten 24 24 six.Buy2,2-Difluoro-3-hydroxypropylamine 25 32 30 5.(R)-2-Methylazetidine hydrochloride site 1 four 6 20 3 four 9 8.PMID:33723791 5 7.2 8.five 9.9 9.6 9.0 14100 14680 39200 11200 13600 44064 241 135 1.25 (PP) 52 26 four.0 (ASP) 60 16 five.5 (ASP) 110 120 1.six (PP) 237.4 55.1 1.three (PP) 24 12 three.five (Aeration) 602 270 1.five (PP) Ludhiana Ludhiana 152 48 32 38 5.10 32 30 five.ten 12 4 11 9.five 73836 9.517002 602 270 1.5 (PP) 602 270 1.5 (PP) Post treatment technique No. of reactors two 1 1 1 1 2 4 two 20 1 1 1 two HRT 1.0 d 1.two d 1.two d 1.two d 1.0 d 6h 3h 1.six d 1.0 d 10 min 1.89 d 1.60 d two.5 d 40700 10816 21120 42000 38000 1008 43810 43810 43810 Vol. (m3) 38000PP Polishing Ponds, ASP Activated Sludge Method.shows a considerable variation in sewage strength. Higher BOD and COD concentrations have been determined at five STPs (100 MLDSurat, 27 34 MLDNoida and 111 152 MLDLudhiana) nevertheless; only the COD concentration at 43 and 48 MLD STPs at Vadodara and Ludhiana was higher (Added fi.