Activated sludge

Activated sludge (AS) has become one of the most widely used biological wastewater treatment processes. The AS involves the transformation through metabolic processes of dissolved and suspended wastewater substrate, consisting of organic, nitrogen and phosphorus compounds, to settlable biological flocs and gases. (Sanin et al., 2006; Semblante et al., 2014). These flocs containing biomass and inorganic matter are settled in secondary sedimentation chambers to produce effluent that has low suspended

Three main experimental activities have been conducted during this research. Operation of the High Rate Activated Sludge (HRAS) Process, analysis of relevant parameters and Biochemical Methane Potential tests for different Solids Retention Times (SRT’s). The research methodology implemented in these activities is described and summarized in this chapter. 4.1 Influent Wastewater In this investigation, the influent is domestic wastewater collected and treated at the Luggage Point (LP) Wastewater

1.2 BACKGROUND OF WASTEWATER TREATMENT Prior to 1947, most of the wastewater used to be generated from domestic sources. After 1947, industrial development in India started growing which lead to the generation of increasing amounts of industrial wastewater and continued discharges into surface and sub surface water bodies. The amounts of organic and inorganic matter generated by industrial activities have increased, and some new organic compounds are being added each year. Wastewater collected

evaluation of the entire treatment process along with biological treatment process particularly suspended growth process Activated Sludge Process (ASP), attached growth process Trickling Filter (TF) and a combination of the both suspended and attached growth process Hybrid Reactor (HR) is presented in the following sections of this chapter. 2.2 REVIEWED OF LITERATURE ON ACTIVATED SLUDGE PROCESS In suspended growth processes, the microorganisms responsible for the treatment of wastewater are maintained

their sewer system and an anticipated future increase in wastewater generation, the plant is currently undergoing a major expansion to increase its capacity from 2 MGD to 6 MGD, with a peak design of 15 MGD. The new treatment plant will used an activated sludge process called the Modified Ludzack-Ettinger (MLE) Process, which consists of a continuous-flow suspended-growth process with an initial anoxic stage, followed by an aerobic stage; used to remove total nitrogen. During the study, the treatment

at a rate of QF = 80m3 d-1 to the SNdN activated sludge system. The SNdN system actually functions as an autonomous treatment plant where oxidation of organic pollutants, nitrification/denitrification and suspended solids sedimentation are taking place. Furthermore a sludge recycling from the secondary clarifier to the aeration tank is performed so as to ensure the required microbiological load (5000 ± 450 mg L-1). The aeration tank of the SNdN activated sludge system operates under low D.O. concentration

evaluation of the entire treatment process along with biological treatment process particularly suspended growth process Activated Sludge Process (ASP), attached growth process Trickling Filter (TF) and a combination of the both suspended and attached growth process Hybrid Reactor (HR) is presented in the following sections of this chapter. 2.2 REVIEWED OF LITERATURE ON ACTIVATED SLUDGE PROCESS In suspended growth processes, the microorganisms responsible for the treatment of wastewater are maintained

Sludge could be produce in many ways, it can be from waste settlement to the dry process. Brick is one of the flexible product that gain attention from researcher to be incorporated with different type of sludge material such as waste water sludge, water treatment sludge, marble sludge, effluent treatment plants (textile industry) sludge and arsenic contaminated sludge. 2.1 Textile sludge Jahagirdar et al (2013) discussed the reuse of textile mill sludge in burnt clay bricks. Textile mill sludge

(Product, cornell). The solid material that remains after the treatment of wastewater is known as sludge (charac, cornell). Sludge can be employed in many different ways, it can be used as a soil additive or growing medium, sent to a composting facility, incinerated or landfilled (Char, cornell). Biosolids are derived primarily from a combination of primary, secondary, and tertiary sewage sludges. Biosolids do not contain the coarse grit and screenings removed from raw wastewater during preliminary

microorganisms, chemical oxidation, coagulation and flocculation, and reverse osmosis. Some of these techniques have been shown to be effective however they have some limitations such as excess amount of chemical usage, accumulation of concentrated sludge that has serious disposal problems and lack of effective color reduction. The adsorption technique, which is based on the transfer of pollutants from the solution to the solid phase, is known as one of the efficient and general wastewater treatment