International Journal of Basic Sciences and Applied Computing (IJBSAC) ISSN: 2394-367X (Online), Volume-10 Issue-3, November 2023 1 Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP) © Copyright: All rights reserved. Retrieval Number: 100.1/ijbsac.B05071010223 DOI:10.35940/ijbsac.B0507.1110323 Journal Website: www.ijbsac.org Study and Verify the Performance Evaluation and Percentage Removal Efficiency of the Plant Duvvuru Susendra, S. Sharada, N. Raveendhar Abstract: Domestic, commercial, and industrial wastewater all belong to the category of urban wastewater. There are various treatment technologies available to treat the waste water from simple oxidation ponds to advanced MBBR systems. The present study is to verify the performance evaluation and percentage removal efficiency of the plant. The various water quality parameters like COD, BOD, TSS, TDS, Oil & Grease , Nitrates, pH, EC, DO, Turbidity and Phosphates of the waste water were being analyzed for the which were collected. Water samples were collected at different stages of treatment plant such as (raw water inlet, Aeration tank, Clarisettler and Treated water outlet) in the weekly basis for a period of 6 weeks before disposal into water body streams. After treatment, the average percentage removal efficiency for the parameters COD, BOD, TSS, TDS, Oil & Grease, and Phosphates was found to be 89%, 88%, 85%, 68%, 69% and 75%. After the analysis the result were finalized by comparing data with CPCB and IS standard values and ultimately, the performance and removal efficiency of the waste water treatment facility was found to be under good condition and the treated water are being used for flush-outs and gardening. Keywords: Percentage Removal Efficiency, Performance Evaluation, MBBR, BOD, COD. I. INTRODUCTION Every living thing on the planet has a fundamental need for water. Despite there being only 3% of drinkable water on the planet, water covers over 71% of its surface. Water resources are becoming scarce as a result of the industrialization and increasing population growth, which necessitates the treatment and reuse of waste water. Sewage is defined as water that has been released into the environment after being used extensively by society, homes, and other industrial sources [1][10]. Domestic sewage is composed primarily of water (99.9%), suspended particles (0.02–0.03%), and other organic and inorganic components [2]. STPs are crucial in the process of purifying sewage to generate liquid and solid (sludge) that are appropriate for reuse or release to the environment. Manuscript received on 20 September 2023 | Revised Manuscript received on 05 November 2023 | Manuscript Accepted on 15 November 2023 | Manuscript published on 30 November 2023. *Correspondence Author(s) Dr. Duvvuru Susendra*, Department of Chemical Engineering, JNTUA College of Engineering Anantapuramu, affiliated to JNTU Anantapur, Ananthapuramu (Andhra Pradesh), India. E-mail: susendraduvvuvu76@gmail.com, ORCID ID: 0000-0002-7729-9632 Dr. S. Sharada, Department of Chemical Engineering, JNTUA College of Engineering Anantapuramu, affiliated to JNTU Anantapur, Ananthapuramu (Andhra Pradesh), India. E-mail: sharadas.chemengg@jntua.ac.in N. Raveendhar, Department of Environment Protection Training and Research Institute, Gachibowli, Hyderabad (Telangana), India. E-mail: chiefscientist.eptri@gmail.com © The Authors. Published by Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC- BY-NC-ND license http://creativecommons.org/licenses/by-nc-nd/4.0/ Limited freshwater resources may be found in many nations across the world. The degree of BOD and suspended solids reduction, which together make up organic pollutants, serves as the standard by which the STP's performance is measured. STP performance efficiency is based on appropriate operation and maintenance in addition to adequate design and construction. The STP performance evaluation is very beneficial as it shows how the system is operating and makes it easier to spot problems that may be fixed. The Moving Bed Biofilm Bioreactor (MBBR), which is the center piece of all activities, will be used in this study to find whether the plant is operating effectively [3]. A. About STP The STP flow diagram is shown in Fig. 1 and is located at Gachibowli, Hyderabad, Telangana, India. Wastewater from the campus may be treated by the STP at a rate of 400 m3/day. It is a modern small-scale treatment facility where sewage is cleaned up and produces wastewater that may be used for flushing toilets, irrigation, and garden supplies. The wastewater was screened via a bar screen chamber to remove big material such as sticks, leaves, garbage, and other large particles that might clog further purification procedures. In the treatment process Urea and DAP were introduced as nutrients for the growth of microorganisms as the effluent was being pumped into the aeration tank. Air was continuously supplied into the aeration tank, effectively aerating the sewage. During its descent, sewage is extensively mixed with the activated sludge. Once the sludge has settled in the settler tank, the water is then sent to the raw water tank [2]. The treatment process was carried out in three stages Primary, secondary and tertiary treatment. Primary treatment is used to remove heavy or big items from wastewater such as plastics, scum such as oil and grease. Secondary treatment is the most significant procedure in wastewater treatment since it involves the removal of total solids, which include both organic and inorganic matter. Tertiary treatment's objective is to provide a last treatment stage to further improve effluent water quality before disposal, here activated carbon filters and slow sand filters are used to filter out pollutants in the water [4][7][8][9]. Existing treatment plant performance evaluation is required to assess existing effluent quality in order to fulfill higher treatment requirements, as well as to learn about the treatment plant [5][6]. B. Dimensions of the treatment units: a Coarse screen chamber: It has 1.2 x 0.5 x 0.3m dimensions and is built of 10mm thick SS plates with 20mm center to center spacing.