Wastewater treatment and nitrogen removal using submerged filter systems

2001 ◽  
Vol 43 (1) ◽  
pp. 225-232 ◽  
Author(s):  
P. C. Chui ◽  
Y. Terashima ◽  
J. H. Tay ◽  
H. Ozaki
Keyword(s):  
Wastewater Treatment ◽  
Nitrogen Removal ◽  
Nitrogen Concentration ◽  
Series System ◽  
Filter System ◽  
Loading Rates ◽  
Nitrogen Concentrations ◽  
In Series ◽  
Effluent Recycling

The performance of two submerged filter systems: a two filters-in-series system and a single combined filter system, in treating a strong nitrogenous wastewater with nitrogen concentration of 480 mg/L was evaluated. Both systems were equally effective in removing up to 90% of nitrogen and 98% of COD from the wastewater for loading rates up to 5 kg COD/m3.d and 0.5 kg N/m3.d. The second system in which anaerobic, anoxic, and aerobic zones were incorporated in a single filter offers a greater flexibility in treatment in that by repositioning the locations of the aeration point and effluent recycling inlet, the zonal volumes can be altered easily to treat wastewaters with different COD and nitrogen concentrations.

Potato Processing Wastewater Treatment at Relatively High Loading Rates Using a Unified Anaerobic Fermenter-Filter

1982 ◽  
Vol 17 (1) ◽  
pp. 63-74 ◽  
Author(s):  
R.C. Landine ◽  
G.J. Brown ◽  
A.A. Cocci ◽  
T. Viraraghavan
Keyword(s):  
Wastewater Treatment ◽  
Room Temperature ◽  
Anaerobic Treatment ◽  
Basic Design ◽  
Potato Processing ◽  
Two Stage ◽  
Filter System ◽  
Loading Rates ◽  
Laboratory Bench ◽  
Scale Design

Abstract A laboratory bench-scale study using a unified anaerobic fermenter-filter system (referred to as a BVF-HAF system) was conducted at room temperature over an 8 month period on potato processing wastewater for the purpose of verifying a proposed full-scale design concept. In addition to two-stage anaerobic treatment, the first stage anaerobic effluent (BVF effluent) was subjected to aerobic polishing in a simulated facultative aerated lagoon with a retention of 4 days. The basic design conditions entailed treatment of a clarified potato wastewater with a COD of 7600 mg/L and a retention of 4 d in the BVF (loading 1.71 kg/m3.d). After over-coming an upset condition believed due to toxicity of the vacuum filtrate feed, the model performed well achieving 78.9% COD removal in the BVF plus 5 3.4% in the HAF for a combined total of 90.2%. When the BVF effluent was aerated the combined BVF - aerated lagoon removal reached 94.8%.

Simultaneous organic stabilization and nitrogen removal in multi-stage biodrum system

2004 ◽  
Vol 50 (6) ◽  
pp. 95-101
Author(s):  
C. Chiemchaisri ◽  
C. Liamsangoun
Keyword(s):  
Wastewater Treatment ◽  
Nitrogen Removal ◽  
Rotational Speed ◽  
Removal Rate ◽  
Nitrogen Concentration ◽  
Domestic Wastewater ◽  
Organic Removal ◽  
Multi Stage ◽  
Domestic Wastewater Treatment ◽  
Removal Efficiencies

This paper presents the performance of a multi-stage biodrum system applied to domestic wastewater treatment. The organic stabilization and nitrogen removal efficiency in the system was investigated at different hydraulic retention times (HRT) of 12, 6 and 3 hours. The rotational speed of the biodrum was examined at 2,4 and 8 rpm. Average organic removal efficiencies in the system at different HRTs of 12, 6 and 3 hours were 96.3, 94.4 and 90.9%. Simultaneously, average nitrogen removal efficiencies were 91.5, 90.6 and 81.0%. The effect of rotational speed on nitrogen removal efficiencies in the system was clearly observed at a low HRT of 3 hours. The experimental results suggested that optimum HRT in the system was 6 hours. Moreover, they revealed that nitrogen removal efficiencies in the reactors operated at different rotational speed were in the same degree when considering the effluent nitrogen concentration. However, the reactors operated at lower rotational speed needed to employ higher numbers of biodrums (4 stages) than the others with higher rotational speed (3 and 2 stages at 4 and 8 rpm.) in order to achieve similar effluent qualities. At a rotational speed of 2 rpm, maximum nitrogen removal rate was found to be 0.2 kg/m3/d.

Nitrification and denitrification in partially aerated biological aerated filter (BAF) with dual size sand media

2007 ◽  
Vol 55 (1-2) ◽  
pp. 9-17 ◽  
Author(s):  
J.H. Ha ◽  
S.K. Ong
Keyword(s):  
Total Nitrogen ◽  
Nitrogen Removal ◽  
Pilot Scale ◽  
Biological Aerated Filter ◽  
Loading Rates ◽  
Oxic Zone ◽  
Nitrogen Concentrations ◽  
Total Nitrogen Removal ◽  
Aerated Filter ◽  
Anoxic Zones

A 104-mm (4-inch) diameter pilot-scale biological aerated filter (BAF) with a media depth of 2.5 m (8.3 feet) was operated with an anaerobic, anoxic and oxic zone at a temperature of 23°C. The medium for the anaerobic and anoxic zones was 10 mm diameter sand while the medium for the oxic zone was 5 mm diameter sand. The influent sCOD and total nitrogen concentrations in the feedwater were approximately 250 mg/L and 35 mg N/L, respectively. sCOD removal at optimum hydraulic retention time (HRT) of 3 h with recirculation rates of 100, 200 and 300% in the column was above 96%. Nitrification was found to be more than 96% for 3 h HRT at 200 and 300% recirculation. Total nitrogen removal was consistent at more than 80% for 4 and 6 h HRT at 300% recirculation. For 3 h HRT and 300% recirculation, total nitrogen removal was approximately 79%. The ammonia loading rates for maximum ammonia removed were 0.15 and 0.19 kg NH3-N/m3-day for 100 and 200% recirculation, respectively. The experimental results demonstrated that the BAF can be operated at an HRT of 3 h with 200–300% recirculation rates with more than 96% removal of sCOD and ammonia and at least 75% removal of total nitrogen.

Sustainable nitrogen removal by denitrifying anammox applied for anaerobic pre-treated potato wastewater

2012 ◽  
Vol 66 (12) ◽  
pp. 2630-2637 ◽  
Author(s):  
A. Mulder ◽  
A. I. Versprille ◽  
D. van Braak
Keyword(s):  
Nitrogen Removal ◽  
Oxygen Demand ◽  
Nitrogen Loading ◽  
Biofilm Reactor ◽  
Ammonium Oxidation ◽  
Loading Rates ◽  
Removal Capacity ◽  
Nitrite Production ◽  
Conversion Rates ◽  
In Series

The feasibility of sustainable nitrogen removal was investigated in a two stage biofilm configuration consisting of a MBBR (Moving Bed Biofilm Reactor) and a Deamox reactor (Biobed-EGSB). The MBBR is used for nitrification and the denitrifying ammonium oxidation (Deamox) is aimed at a nitrogen removal process in which part of the required nitrite for the typical anammox reaction originated from nitrate. Anaerobic pre-treated potato wastewater was supplied to a MBBR and Deamox reactor operated in series with a bypass flow of 30%. The MBBR showed stable nitrite production at ammonium-loading rates of 0.9–1.0 kg NH4-N/m3 d with ammonium conversion rates of 0.80–0.85 kg NH4-N/m3 d. The nitrogen-loading rate and conversion rate of the Deamox reactor were 1.6–1.8 and 1.6 kg N/m3 d. The maximum ammonium removal capacity in the Deamox reactor was 0.6 kg NH4-N/m3 d. The removal efficiency of soluble total nitrogen reached 90%. The Deamox process performance was found to be negatively affected during decline of the operating temperature from 33 to 22 °C and by organic loading rates with a chemical oxygen demand (COD)/NO2-N ratio >1.

The effect of aeration and effluent recycling on domestic wastewater treatment in a pilot-plant system of duckweed ponds

2013 ◽  
Vol 69 (2) ◽  
pp. 350-357 ◽  
Author(s):  
Miriam Ben-shalom ◽  
Semion Shandalov ◽  
Asher Brenner ◽  
Gideon Oron
Keyword(s):  
Wastewater Treatment ◽  
Positive Impact ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Pilot Scale ◽  
Pollutant Removal ◽  
Domestic Wastewater Treatment ◽  
In Series ◽  
Removal Efficiencies ◽  
Effluent Recycling

Three pilot-scale duckweed pond (DP) wastewater treatment systems were designed and operated to examine the effect of aeration and effluent recycling on treatment efficiency. Each system consisted of two DPs in series fed by pre-settled domestic sewage. The first system (duckweed+ conventional treatment) was ‘natural’ and included only duckweed plants. The second system (duckweed aeration) included aeration in the second pond. The third system (duckweed+ aeration+ circulation) included aeration in the second pond and effluent recycling from the second to the first pond. All three systems demonstrated similarly efficient removal of organic matter and nutrients. Supplemental aeration had no effect on either dissolved oxygen levels or on pollutant removal efficiencies. Although recycling had almost no influence on nutrient removal efficiencies, it had a positive impact on chemical oxygen demand and total suspended solids removals due to equalization of load and pH, which suppressed algae growth. Recycling also improved the appearance and growth rate of the duckweed plants, especially during heavy wastewater loads.

Anammox moving bed biofilm reactor pilot at the 26th Ward wastewater treatment plants in Brooklyn, New York: start-up, biofilm population diversity and performance optimization

2014 ◽  
Vol 70 (9) ◽  
pp. 1448-1455 ◽  
Author(s):  
M. Mehrdad ◽  
H. Park ◽  
K. Ramalingam ◽  
J. Fillos ◽  
K. Beckmann ◽  
...  
Keyword(s):  
New York ◽  
Wastewater Treatment ◽  
Nitrogen Removal ◽  
Performance Optimization ◽  
Nitrogen Loading ◽  
Biofilm Reactor ◽  
Moving Bed Biofilm Reactor ◽  
Moving Bed ◽  
Loading Rates ◽  
Reject Water

New York City Environmental Protection in conjunction with City College of New York assessed the application of the anammox process in the reject water treatment using a moving bed biofilm reactor (MBBR) located at the 26th Ward wastewater treatment plant, in Brooklyn, NY. The single-stage nitritation/anammox MBBR was seeded with activated sludge and consequently was enriched with its own ‘homegrown’ anammox bacteria (AMX). Objectives of this study included collection of additional process kinetic and operating data and assessment of the effect of nitrogen loading rates on process performance. The initial target total inorganic nitrogen removal of 70% was limited by the low alkalinity concentration available in the influent reject water. Higher removals were achieved after supplementing the alkalinity by adding sodium hydroxide. Throughout startup and process optimization, quantitative real-time polymerase chain reaction (qPCR) analyses were used for monitoring the relevant species enriched in the biofilm and in the suspension. Maximum nitrogen removal rate was achieved by stimulating the growth of a thick biofilm on the carriers, and controlling the concentration of dissolved oxygen in the bulk flow and the nitrogen loading rates per surface area; all three appear to have contributed in suppressing nitrite-oxidizing bacteria activity while enriching AMX density within the biofilm.

Tannery wastewater treatment: comparison between SBR and MSBR

2003 ◽  
Vol 3 (5-6) ◽  
pp. 275-282 ◽  
Author(s):  
J.M. Martinez ◽  
A. Goltara ◽  
R. Mendez
Keyword(s):  
Wastewater Treatment ◽  
Nitrogen Removal ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Stable Operation ◽  
Filamentous Bacteria ◽  
Removal Rates ◽  
Loading Rates ◽  
Treatment Comparison ◽  
Removal Efficiencies

The beamhouse sections of tanneries produce around 45% of the total wastewater of factories. A beamhouse wastewater, collected after the oxidation of sulphide compounds and diluted to average COD and ammonium concentrations around 550 and 90 mg/L respectively, was treated separately in two reactors: a sequencing batch reactor (SBR) and a membrane sequencing batch reactor (MSBR). Both systems were operated for 150 days with similar conditions without sludge purge, operating at low feed to microorganisms (F/M) ratios and applying organic and ammonium loading rates up to 0.75 gCOD/L·d and 0.12 gNH4+/L·d respectively. The SBR achieved low ammonium and nitrogen removal rates and COD removal values close to 90%, which decreased dramatically during the last 30 days of operation. An important washout of microorganisms in the SBR was noticed due to the proliferation of filamentous bacteria. However, removal efficiencies close to 100% in ammonium and 90% in COD were achieved in the MSBR, and very stable operation was maintained.

scholarly journals Effect of influent ammonia nitrogen concentration on microbial community in MBBR reactor

2020 ◽  
Author(s):  
Huizhou Yuan ◽  
Yong Li ◽  
Kun Wang
Keyword(s):  
Microbial Community ◽  
Nitrogen Removal ◽  
Short Range ◽  
Nitrogen Concentration ◽  
Ammonia Nitrogen ◽  
Biofilm Reactor ◽  
Moving Bed Biofilm Reactor ◽  
Average Efficiency ◽  
Nitrogen Concentrations ◽  
Microbial Samples

Abstract The purpose of this study is to explore the nitrogen removal efficiency of the moving bed biofilm reactor (MBBR) under different ammonia nitrogen concentrations (states P1–P5), especially the composition of various forms of nitrogen, related genes and microbial community structure and succession law in the effluent of the reactor. The results show that the average efficiency of MBBR effluent denitrification is 63.63%. The concentration dynamics of NO3−-N and NO2−-N in the effluent indicated a relatively short-range nitrification and denitrification reaction in the MBBR. The results of 16SrDNA sequencing of P1–P5 microbial samples found that changes in the concentration of ammonia nitrogen in the influent produced significant changes in the composition of the microbial community in the MBBR. The genera Ottowia and Flavobacterium played an important role in the nitrogen removal of the MBBR system.

Development of an On-Site Moderate Land Limited Small Farm Wastewater Treatment Plant

1993 ◽  
Vol 27 (1) ◽  
pp. 115-121 ◽  
Author(s):  
P. Y. Yang ◽  
H. Chen ◽  
N. Kongricharoern ◽  
C. Polprasert
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Aquatic Plant ◽  
Treatment Plant ◽  
Pilot Scale ◽  
Small Farm ◽  
Loading Rates ◽  
Inorganic Pollutant ◽  
In Series ◽  
The Tropics

Two types of pilot scale systems, namely, reactors in series and single reactor, were tested for developing an on-site small wastewater treatment plant. Combined bio-fixed film and aquatic plant for a moderate land limited and tropical application were tested for the proposed system. Anaerobically digested wastewater with TCOD concentration of about 500 and 1000 mg/L was used as the substrate and various hydraulic retentiontimes(HRT) and loading rates were tested for optimal removal of organic and inorganic pollutant contained in the anaerobically digested wastewater. It was found that the removal efficiencies of TCOD and NH4-N of more than 90% and 95%, respectively, could be achieved under the loading rate of 120 g TCOD/m3/day and 13 g NH4-N/m3/day and HRT of more than 14 days. The system has demonstrated that it is simple in construction and operation. It is highly possible to be integrated as one of the components of the swine waste management system in the tropics and moderate land limited conditions.

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