Turbidity measurements (NTU) were taken, and percent reductions calculated for pre-filtered influent and post-filtered effluent using a Hach 2100 N Turbidity Meter. The Potential of Hydrogen (pH) was measured using a Denver Instruments Model 215 pH meter with combination electrode. The average flow of filters was measured for control and experimental filters by dividing the filtered volume by the filtration time and reported in mL/h.
2100n turbidity meter
Manufactured by HACH
Sourced in United States
The 2100N turbidity meter is a laboratory instrument designed to measure the turbidity of water samples. It utilizes a nephelometric measurement technique to determine the clarity of the sample by detecting the amount of light scattered by suspended particles. The 2100N provides accurate and reliable turbidity readings in Nephelometric Turbidity Units (NTU).
Automatically generated - may contain errors
Lab products found in correlation
Sodium chloride (nacl), by Thermo Fisher Scientific (1 mentions)
Brilliance e coli coliform agar, by Thermo Fisher Scientific (1 mentions)
Uv 1800 spectrophotometer, by Shimadzu (1 mentions)
Toc vcpn analyzer, by Shimadzu (1 mentions)
8453 uv visible spectrophotometer, by Hewlett-Packard (1 mentions)
Gas chromatograph, by Shimadzu (1 mentions)
Spss statistics 20, by IBM (1 mentions)
Lc 10ad, by Shimadzu (1 mentions)
6 protocols using 2100n turbidity meter
1
Turbidity, pH, and Flow Rate Measurements
2
Detecting and Quantifying E. coli in Water
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The detection and quantification of E. coli in the processing water was performed using the serial dilution pour plate agar technique. Serial dilutions of the reaction solution were performed in sterile 0.8% (w/v%) NaCl (Fisher Scientific, UK) aqueous solution and 200 μL of each dilution (including neat sample) were pipetted and spread onto Brilliance E. coli/Coliform Agar (Oxoid) plates, a selective culture medium. The plates were incubated at 37 •C for 20-24 h before viable counts were determined. E. coli colonies appeared with purple colour, while coliforms colonies had a pinkish colour. For the undiluted samples, 1 mL of sample was spread over five 90 mm Petri dishes (i.e. 200 μL of sample per Petri dish).
This was done to reduce the detection limit to 1 CFU mL -1 for the undiluted samples (Paleologou et al., 2007; Rincón and Pulgarin, 2004) .
The turbidity was measured on a HACH 2100N turbidity meter, while conductivity and pH were measured by a portable conductivity and pH meter (± 0.1 pH accuracy), respectively, by Hanna Instruments.
This was done to reduce the detection limit to 1 CFU mL -1 for the undiluted samples (Paleologou et al., 2007; Rincón and Pulgarin, 2004) .
The turbidity was measured on a HACH 2100N turbidity meter, while conductivity and pH were measured by a portable conductivity and pH meter (± 0.1 pH accuracy), respectively, by Hanna Instruments.
3
Analytical Techniques for Environmental Assessment
4
Water Quality Analysis via Instrumental Methods
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Water turbidity was determined using an HACH 2100N Turbidity Meter (detection limit = 0.001 NTU). TOC was measured with a Shimadzu TOC-VCPN analyzer (detection limit = 50 μg·L−1). The effect of the coagulants on TOC analysis was found to be negligible. Water alkalinity was obtained per the acid titration technique, and water hardness was measured via the EDTA Titrimetric Method. UV-vis absorption spectra were obtained to determine the characteristics of the DOM using a Hewlett Packard 8453 UV-Visible Spectrophotometer (Hewlett Packard, Waldbronn, Germany) at a wavelength of 254 nm.
5
Analytical Methods for Wastewater Treatment
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Common indexes, such as the chemical oxygen demand (COD), total phosphorus (TP), PO 4 3-, TN, ammonia (NH 3 -N), sulfate, sludge concentration, total iron and ferrous ion (Fe 2+ ) were measured frequently (Chinese NEPA, 2002) . Turbidity was measured with a 2100N turbidity meter (Hach, USA), while the ORP was detected by a portable meter (Hatch, USA). The biogas composition (such as CH 4 , CO 2 , N 2 , and H 2 )
was measured by a gas chromatograph (Tianmei, China) (Hu et al., 2018b) , while the volatile fatty acids (VFAs) were analyzed with a liquid chromatograph (LC-10AD, Shimadzu, Japan) (Tang et al., 2017) .
The main components of the EPS, namely proteins and polysaccharides, were detected using chemical analytical methods. Proteins and polysaccharides were analyzed according to the modified Lowry method (Hartree, 1972) and the Anthrone-sulfuric acid method (Loewus, 2002) .
The statistical analyses were accomplished by using IBM SPSS Statistics 20.0 software (International Business Machines Co., USA) based on reported method Journal Pre-proof J o u r n a l P r e -p r o o f 9 (Yang et al., 2020) . In detail, the differences in COD removal and specific methanogenic activities in the two AnDMBRs were determined using one-way analysis of variance (ANOVA), and the significant difference level was assessed based on the P value obtained (P< 0.05 indicating a significant difference).
was measured by a gas chromatograph (Tianmei, China) (Hu et al., 2018b) , while the volatile fatty acids (VFAs) were analyzed with a liquid chromatograph (LC-10AD, Shimadzu, Japan) (Tang et al., 2017) .
The main components of the EPS, namely proteins and polysaccharides, were detected using chemical analytical methods. Proteins and polysaccharides were analyzed according to the modified Lowry method (Hartree, 1972) and the Anthrone-sulfuric acid method (Loewus, 2002) .
The statistical analyses were accomplished by using IBM SPSS Statistics 20.0 software (International Business Machines Co., USA) based on reported method Journal Pre-proof J o u r n a l P r e -p r o o f 9 (Yang et al., 2020) . In detail, the differences in COD removal and specific methanogenic activities in the two AnDMBRs were determined using one-way analysis of variance (ANOVA), and the significant difference level was assessed based on the P value obtained (P< 0.05 indicating a significant difference).
6
Turbidimetric Analysis of Reagents
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Reagents and microsand were weighed using a BT423S electronic balance produced by Sartorius Scienti c Instruments (Beijing) Co. Ltd. The turbidities were analyzed by a 2100N turbidity meter manufactured by Hach Company, USA.
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