Trickling filter

About: Trickling filter is a research topic. Over the lifetime, 1098 publications have been published within this topic receiving 20219 citations.

Models and Design of Aerobic Biological Treatment Processes

Abstract: Various models, applied to the design of aeration tanks, trickling filters and rotating discs, are compared. The adequacy of the models is established from the minimal mean square deviation of the measured and calculated values of the effluent concentration of a pollutant. It is shown that at the oxidation of simple substrates of the glucose type Moser's model is an adequate model and Monod's model is a particular case of this model. If a single substrate has a large concentration, activated sludge or biofilm become “saturated” and the oxidation kinetics follows the zero order. As the processing of the results of some experiments showed, the classical Monod model and its extreme case—the first-order equation of a reaction—are not adequate to the processes of the oxidation of multicomponent municipal sewage water. Equations for reactions of higher orders are true for them. The rate constant of the first-order reaction correlates well with the effluent concentration-influent concentration ratio, i.e., it is variable and depends on the treatment conditions and, above all, it is inversely proportional to the level of treatment.

Integrated Anaerobic-Aerobic and Wetland System for Wastewater Treatment and Recycling in Fish Canning Industry

Abstract: Fish canning industry is one of the top priority industries in Indonesia that is competitive in international market and essential to food security It is also an industry with high water consumption due to its water-intensive processes such as thawing and washing that produces large amount of wastewater containing very high load of organic pollutants which must be treated properly before disposal into the environment This study was conducted using wastewater characteristics from one of the fish canning plants in Bali, Indonesia, that already implemented wastewater treatment using a combination of aerobic treatments with trickling filter and activated sludge The treatment system has difficulty to achieve a good and stable effluent quality, especially during high load production season It is necessary to find a better system that can treat the high load of organic content in wastewater and produce a cleaner effluent that can be recycled back into the production process This study is aimed to develop a model of integrated system comprised of sedimentation, coagulation-flocculation, Upflow Anaerobic Sludge Blanket (UASB) and Modified Ludzack-Ettinger (MLE) that can be used as a base design for further implementation in pilot-scale facility The integrated system was designed to remove 99 % of BOD, 99 % of oil and grease, 98 % of TSS and 878 % of total nitrogen achieving effluent quality of 599 mg/L BOD, 06 mg/L oil and grease, 274 mg/L TSS, and 300 mg/L total nitrogen in nitrates form Compared to the existing treatment system with effluent quality of 3514 mg/L BOD, 337 mg/L TSS and 1111 mg/L ammonia, this system could improve the effluent quality significantly by maintaining a hydraulic retention time (HRT) of 553 h Combining constructed wetland with HRT of 288 h as water reclamation system to refine the water quality, the nitrogen content could be reduced to less than 10 mg/L to meet the requirement as raw water for clean water production process The design in this study could be used to replace the existing aerobic treatment system and enable the industry to solve the environmental problems of wastewater disposal and water conservation and expand further the production capacity simultaneously

Biological wastewater treatment technology: Advancement and drawbacks

Abstract: Biological wastewater treatment is a modern technique in which wastewater is treated with microorganisms instead of chemicals In this way, we try to prevent the adverse effects caused by chemical treatment of wastewater such as chemical accumulation in water bodies or algal blooming In biological wastewater treatment, many aerobic as well as anaerobic microorganisms can be used in various methods to reduce different types of pollutants present in water and to reduce biochemical oxygen demand of water Activated sludge is also a very important part of the biological treatment of wastewater as it is used as inoculum to start the microbial reactions in wastewater treatment plants Various techniques of biological wastewater treatment can be used to remove a variety of pollutants from wastewater such as conventional activated sludge process, membrane bioreactors, or trickling filter process Biological wastewater treatment is a slow process and requires a large area to treat and store water, which leads to high capital and operating cost Biological wastewater treatment produces some unwanted microorganisms that produce gases and bad odor This treated effluents containing water cannot be released into water bodies as it can cause a change in physicochemical properties of water, which ultimately leads to a decrease in the aquatic animal population Biological treatment of wastewater eliminates organic pollutants but not all types of pollutants such as detergents, cosmetic wastes, etc This chapter provides an overview of advanced biological methods used for treating wastewater and also highlights the various drawbacks associated with these methods