A strategy for coupling municipal wastewater treatment using the sequencing batch reactor with effluent nutrient recovery through aquaculture

1997 ◽  
Vol 35 (1) ◽  
pp. 177-184 ◽  
Author(s):  
A. K. Umble ◽  
L. H. Ketchum
Keyword(s):  
Biological Treatment ◽  
Suspended Solids ◽  
Sequencing Batch Reactor ◽  
Municipal Wastewater ◽  
Batch Reactor ◽  
Inorganic Nutrients ◽  
Food Sources ◽  
Municipal Wastewater Treatment ◽  
N:P Ratios ◽  
Algal Groups

Recovering inorganic nutrients from treated municipal wastewaters prior to discharge, can not only minimize deterioration of receiving water quality, but can also be used to culture fish. Recovery can be achieved by integrating an ecological component, aquaculture, into the treatment scheme. Because of its operating flexibility, a Sequencing Batch Reactor was used to provide biological treatment of a municipal wastewater for oxidation of organic matter, removal of suspended solids, and nitrification. Performance of the reactor's 12-hour cycle for CBOD5, TSS, and NH3-N removals was 98%, 90%, and 89%, respectively. To recover inorganic nutrients, effluents were used to fertilize growth of desirable algal groups in an aquaculture component. Desirable algal groups are those which are preferred food sources for those zooplankton considered preferred prey for fish. Desirable algal response is influenced by the ratio of inorganic nutrients put into the system. An SBR's operational strategy was developed to produce effluents with acceptable N:P ratios ranging from 16 to 23. Though wide variation of this ratio resulted from this fertilization in the aquaculture tanks, the resulting algal response throughout the culture period was dominance of edible algal greens.

Sludge reduction by direct addition of chlorine dioxide into a sequencing batch reactor under operational mode of repeatedly alternating aeration/non-aeration

2015 ◽  
Vol 72 (9) ◽  
pp. 1534-1542 ◽  
Author(s):  
Hong Peng ◽  
Weiyi Liu ◽  
Yuanmei Li ◽  
Hong Xiao
Keyword(s):  
Chlorine Dioxide ◽  
Suspended Solids ◽  
Sequencing Batch Reactor ◽  
Municipal Wastewater ◽  
Batch Reactor ◽  
Volume Index ◽  
Sludge Reduction ◽  
Operational Mode ◽  
Municipal Wastewater Treatment ◽  
Direct Addition

The effect of direct addition of chlorine dioxide (ClO2) into a repeatedly alternating aeration/non-aeration sequencing batch reactor (SBR) on its sludge reduction and process performance was investigated. The experimental results showed that the sludge reduction efficiency was 32.9% and the observed growth yield (Yobs) of SBR was 0.11 kg VSS (volatile suspended solids) /kg COD (chemical oxygen demand) for 80 days’ operation at the optimum ClO2 dosage of 2.0 mg/g TSS (total suspended solids). It was speculated that cell lysis and cryptic growth, uncoupled metabolism and endogenous metabolism were jointly responsible for the sludge reduction in this study. COD, NH3-N, total nitrogen (TN) and total phosphorus (TP) in the effluent increased on average 29.47, 4.44, 1.97 and 0.05 mg/L, respectively. However, the effluent quality still satisfied the first-class B discharge standards for municipal wastewater treatment plants in China. In that case, the sludge maintained fine viability with the specific oxygen uptake rate (SOUR) being 14.47 mg O2/(g VSS·h) and demonstrated good settleability with the sludge volume index (SVI) being 116 mL/g. The extra cost of sludge reduction at the optimum ClO2 dosage was estimated to be 2.24 CNY (or 0.36 dollar)/kg dry sludge.

scholarly journals Methods of reconstruction and modification of the sequencing batch reactor at municipal wastewater treatment plants in Vietnam

Vestnik MGSU ◽  
2019 ◽  
pp. 589-602 ◽  
Author(s):  
Tran Ha Quan ◽  
Elena S. Gogina
Keyword(s):  
Wastewater Treatment ◽  
Sequencing Batch Reactor ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Batch Reactor ◽  
Municipal Wastewater Treatment ◽  
Wastewater Purification ◽  
Municipal Wastewater Treatment Plants ◽  
Operation Cycle

Introduction. Vietnamese urban municipal wastewater treatment plants are mainly of aeration-type facilities. Nowadays, an aeration-type plant, the Sequencing Batch Reactor (SBR), is widely applied and possesses a number of advantages over traditional systems with suspended activated sludge. Advantages of the SBR are mainly concluded in simplicity of operation, occupied area and cost. There is a number of problems at the wastewater treatment plants; they are connected with supplying only a half of wastewater design amount for the treatment as well as with quality of the purified water that must satisfy requirements of the Vietnamese discharge standard, the Standard A. Therefore, reconstruction and modification of the SBR is the major challenger to ensure the sustained development of large Vietnamese cities and maintenance of ecological balance. Materials and methods. To enhance the efficiency of wastewater purification in the SBR, the experiments were set on reactor reconstruction and modification by two directions: (1) Technological method, i.e. applying the Biochip 25 biocarrier, and (2) Operation method, i.e. adding the anoxic phase in reactor operation cycle. Laboratory tests were conducted for each of the directions, including comparison of a typical reactor with the modified one. Results. The study resulted in obtaining an optimal amount of the BioChip biocarrier material (10 to 20 %) that increased efficiency of wastewater purification by 10 to 20 %. In addition to this, when creating an anoxic phase of the operation cycle, efficiency of nitrogen removal increased by 20 %. When the denitrification occurs under the anoxic conditions, it contributes to stabilization of ammonium nitrogen removal for daily nitrogen loading in reactor of 0.3 to 0.8 TKN kg/sludge kg. Conclusions. The suggested technology provides the quality of treated water corresponding with the Vietnamese Standard A requirements. At the present, it is planned to proceed with the experiment on the base of Vietnamese semi-industrial plant for research and appraisal of the SBR reconstruction and modification method. Acknowledgements. The authors are grateful to AKVA Control company in Samara for granted biocarrier Mutag BioChip 25 and to Associate Professor Tran Van Quang and his students, Nguyen Ngoc Phuong and Truong Quoc Dai, of Environment Protect Research Center, Danang University for support of the experiment.

scholarly journals Municipal wastewater treatment by the bioaugmentation of Bacillus sp. K5 within a sequencing batch reactor

PLoS ONE ◽  
2017 ◽  
Vol 12 (6) ◽  
pp. e0178837 ◽  
Author(s):  
Yunlong Yang ◽  
Linxiang Xie ◽  
Xin Tao ◽  
Kaihui Hu ◽  
Shaobin Huang
Keyword(s):  
Wastewater Treatment ◽  
Sequencing Batch Reactor ◽  
Municipal Wastewater ◽  
Batch Reactor ◽  
Bacillus Sp ◽  
Municipal Wastewater Treatment

scholarly journals Co-treatment of old landfill leachate and municipal wastewater in sequencing batch reactor (SBR): effect of landfill leachate concentration

2016 ◽  
Vol 51 (4) ◽  
pp. 377-387 ◽  
Author(s):  
Kshitij Ranjan ◽  
Shubhrasekhar Chakraborty ◽  
Mohini Verma ◽  
Jawed Iqbal ◽  
R. Naresh Kumar
Keyword(s):  
Removal Efficiency ◽  
Landfill Leachate ◽  
Suspended Solids ◽  
Sequencing Batch Reactor ◽  
Municipal Wastewater ◽  
Batch Reactor ◽  
Operating Conditions ◽  
Volume Index ◽  
Turbidity Removal ◽  
Mixed Liquor

Sequencing batch reactor (SBR) was assessed for direct co-treatment of old landfill leachate and municipal wastewater for chemical oxygen demand (COD), nutrients and turbidity removal. Nitrogen removal was achieved by sequential nitrification and denitrification under post-anoxic conditions. Initially, SBR operating conditions were optimized by varying hydraulic retention time (HRT) at 20% (v/v) landfill leachate concentration, and results showed that 6 d HRT was suitable for co-treatment. SBR performance was assessed in terms of COD, ammonia, nitrate, phosphate, and turbidity removal efficiency. pH, mixed liquor suspended solids, mixed liquor volatile suspended solids (MLVSS), and sludge volume index were monitored to evaluate stability of SBR. MLVSS indicated that biomass was able to grow even at higher concentrations of old landfill leachate. Ammonia and nitrate removal efficiency was more than 93% and 83%, respectively, whereas COD reduction was in the range of 60–70%. Phosphate and turbidity removal efficiency was 80% and 83%, respectively. Microbial growth kinetic parameters indicated that there was no inhibition of biomass growth up to 20% landfill leachate. The results highlighted that SBR can be used as an initial step for direct co-treatment of landfill leachate and municipal wastewater.

Long term experiences of sequencing batch reactor-system and wetland treatment from a municipal wastewater treatment plant in Sweden, operated with low temperature wastewater

2014 ◽  
Vol 9 (2) ◽  
pp. 235-242 ◽  
Author(s):  
S. Morling ◽  
A. Franquiz ◽  
J. Måhlgren ◽  
Å. Westlund
Keyword(s):  
Wastewater Treatment ◽  
Low Temperature ◽  
Wastewater Treatment Plant ◽  
Sequencing Batch Reactor ◽  
Municipal Wastewater ◽  
Batch Reactor ◽  
Combined Treatment ◽  
Treatment Plant ◽  
Municipal Wastewater Treatment ◽  
Total N

A biological wastewater treatment plant, Nynäshamn treating municipal wastewater and septic sludge operated with a combination of sequencing batch reactor (SBR) units and constructed wetland is presented in this paper. The plant has to treat low temperature wastewater in winter time, still with demands for a biological nitrogen removal. Treatment results from a 13 year operation period are presented. Special attention was given to the nutrient removal during low temperature conditions. The combination of a SBR system along with classical chemical precipitation and a polishing step based on ‘natural’ extensive treatment has been a sustainable way to keep the discharge levels low. The combined treatment with SBR and the wetland at the Nynäshamn plant has resulted in improved discharge levels typically as follows (annual mean values); BOD7 3 mg/l, to be compared with the formal consent value of <15 mg/l, total P < 0.1 mg/l, to be compared with the formal consent value of <0.5 mg/l and total N 7 mg/l, to be compared with the formal consent value of <15 mg/l. It is also important to underline that the change of process train has resulted in a substantial saving of the precipitant agent for phosphorus removal. The needed dosage is now 50% of the previous dose, before the implementation of the SBR-units.

Перспективная технология очистки коммунальных сточных вод гранулированными илами

2019 ◽  
pp. 34-44
Author(s):  
M. Kevbrina ◽  
A. Akmentina ◽  
A. Dorofeev ◽  
A. Agarev ◽  
V. Aseeva ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Biological Treatment ◽  
Municipal Wastewater ◽  
Batch Reactor ◽  
Granular Sludge ◽  
Aeration Tank ◽  
Municipal Wastewater Treatment ◽  
Treatment Technology ◽  
Maximum Permissible Concentrations

Увеличение удельной биохимической мощности сооружений с применением так называемых гранулированных активных илов является одним из перспективных направлений развития технологий биологической очистки сточных вод. Гранулированные илы это микробные биоценозы, специализирующиеся на разложении и минерализации веществ, содержащихся в сточных водах. Отличие от обычных илов обусловлено двумя важными факторами: строением основной структурной единицы гранулированного ила гранулы, и высокой скоростью осаждения (до 20 м/ч). Это позволяет создавать в биореакторах очистки сточных вод дозы ила до 10 г/л. Представлены результаты разработки первой в РФ биотехнологии очистки городских сточных вод с применением гранулированного активного ила. Технология реализована на объектах АО Мосводоканал . Технология аэробной биологической очистки в реакторе последовательнопериодического действия с последовательной нитриденитрификацией и восходящим потоком сточной воды позволяет обеспечить качество очищенной воды, соответствующее нормативам предельно допустимых концентраций для сброса в водоемы рыбохозяйственного назначения. Техникоэкономическое сравнение разработанной технологии с технологией удаления биогенных элементов в аэротенке проточного типа показало, что затраты жизненного цикла сооружений с частично гранулированным активным илом в 1,4 раза меньше затрат традиционной технологии биологической очистки (для производительности 1000 м3/сут).Increasing the specific biochemical capacity of the facilities using the socalled granular activated sludge is one of the promising areas for the development of biological wastewater treatment technologies. Granular sludge is microbial biocenosis specializing in the decomposition and mineralization of substances present in wastewater. The main distinction from regular sludge is due to two important factors: the composition of the basic structural unit of granular sludge granules, and a high sedimentation rate (up to 20 m/h). This provides for developing sludge doses of up to 10 g/l in bioreactors of wastewater treatment. The results of the development of the first biotechnology in Russia for municipal wastewater treatment of using granular activated sludge are presented. The technology has been implemented at the facilities of Mosvodokanal JSC. The technology of aerobic biological treatment in a sequencing batch reactor with sequential nitridenitrification and an upward flow of wastewater provides for the quality of effluent that meets the standards for maximum permissible concentrations for discharge into fishery bodies. Technical and economic comparison of the developed technology with the technology of removing nutrients in flowthrough aeration tank showed that the life cycle costs of the facilities with partially granulated activated sludge are 1.4 times less than the costs of traditional biological treatment technology (for a capacity of 1000 m3/day).

Biological Treatment of Poultry Slaughterhouse Wastewater by Using Different Fibers

2015 ◽  
Vol 802 ◽  
pp. 401-405 ◽  
Author(s):  
Nur Nasuha Ahmad Puat ◽  
Hamidi Abdul Aziz
Keyword(s):  
Biological Treatment ◽  
Room Temperature ◽  
Suspended Solids ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Slaughterhouse Wastewater ◽  
Average Percentage ◽  
Pollutant Concentrations ◽  
Overall Performance

This study evaluated the performance of sequencing batch reactor (SBR) with and without the fibers of poultry slaughterhouse wastewater (PSWW). The fibers act as attachment materials to the suspended solids, which are considered as pollutant in PSWW. PSWW contains high-pollutant concentrations. Experiments were conducted using two 60 L laboratory SBR reactors at room temperature (25 °C) and pH 7±0.5. The removal percentage of SBR with and without the fibers was compared in terms of chemical oxygen demand and biological oxygen demand. The removal percentage of SBR with fibers showed higher overall performance, which was approximately 90%. Meanwhile, the removal of SBR without fibers achieved an average percentage of about 70%, which was slightly lower compared with SBR reactor with fibers.

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