Research type multifunctional activated sludge breathing apparatus

Research type multifunctional activated sludge breathing apparatusBM series

The unique design of the research oriented BM series multifunctional activated sludge aerator plays a very important role in scientific research and sewage treatment, creating a new platform for analysis, testing, problem diagnosis, and optimization. The system automatically measures and calculates the following parameters by measuring and analyzing the oxygen consumption of different combinations of activated sludge, activated sludge+sewage samples, activated sludge+standard samples, and activated sludge+sewage samples+standard samples:

Oxygen consumption rate OUR (mg O)₂/l.h）；

Relative to the oxygen consumption rate SOUR of MLVSS (mg O)₂/l.h）

● Dynamic Respiration Rate Rs (Dynamic Respiration Rate mg O)₂/l.h）

Specific respiratory rate Rsp (mg O)₂/g. H) Relative respiratory rate to MLVSS

● Maximum/maximum respiratory rate Rspmax

Oxygen consumption OC or BODst (mg O2/l)

COD can biodegrade a portion of bCOD (Biodegradable Fractions of COD), including fast biodegradation COD (i.e. rbCOD) and slow biodegradation COD (i.e. sbCOD).

U (mgDQO/l.h) Chemical Oxygen Demand Absorption Rate

Q (mgDQO/mgSSV. D) specific chemical oxygen demand absorption rate=U/volatile suspended solids (VSS)

Scientific research, application direction of paper publication

● Activated sludge kinetic parameters and COD classification

Endogenous respiration rates of heterotrophic and autotrophic organisms

Classification of Chemical Oxygen Demand and Specific Biodegradability of Activated Sludge

Toxicity of activated sludge: overall toxicity and nitrification specific toxicity

Nitrification: Nitrification rate, minimum dissolved oxygen, and nitrification sludge activity index

Denitrification: denitrification rate, chemical oxygen demand required for denitrification

The influence of process conditions on biological activity and processing capacity

● Stoichiometric and kinetic parameters

Mobile bed biofilm reactor (MBBR) process and respiration measurement of granular sludge

● Cycle control of sequencing batch reactor (SBR) process

● Assessment of aeration system

model

There are multiple models of BM series respirators: BM Advanced/BM Advance2, BM Advanced Pro, BM-T+, BM-EVO/BM-EVO2

●BM-Advance 型：Standard equipment includes SBR reaction tank (1L), temperature controller, peristaltic pump, electronic control panel, maintenance free oxygen sensor, pH sensor, double-layer agitator, air diffuser, computer and software, etc.

●BM-Advance2 型：Two reaction tanks, with the same parameters as BM Advance.

●BM-Advance Pro 型On the basis of BM Advanced, an oxidation-reduction potential ORP sensor has been added.

●BM-T+：Not equipped with pH measurement function and temperature controller, other parameters are the same as BM Advance. Instrument size: 33 * 34 * 36 cm, weight: 15 KG

●BM-EVO type:Not equipped with pH measurement function, other parameters are the same as BM Advance.

●BM-EVO2 type:Two reaction tanks, with the same parameters as BM-EVO. Weight: 35 KG

Three operating modes: OUR mode, cyclic OUR mode, and R mode

■ OUR mode (1)

Based on the traditional batch respiration measurement method, the operating mode is optimized through a single sensing membrane device, which can isolate the measurement chamber from the atmosphere, avoiding external air interference and bubble generation.

Initial dissolved oxygen (DO) is fixed (Cb), and during the automatic aeration shutdown test, dissolved oxygen is measured (Cs). Oxygen consumption rate (OUR) and specific oxygen consumption rate (SOUR) are automatically calculated

DO, OUR, SOUR real-time map

■ OUR mode (2)

Taking the mixed solution from the bioreactor and measuring the OUR and SOUR parameters within a specific experimental time, the results are usually valid when the parameters reach a stable maximum/maximum value.

Loop OUR mode (1)

The cyclic OUR mode is an automatic continuous measurement chain for OUR and SOUR.

In this mode, two dissolved oxygen limits (low dissolved oxygen value and high dissolved oxygen value) need to be set for the cyclic test. During the measurement process, the dissolved oxygen will fluctuate between the set high and low values. When each cycle reaches the low dissolved oxygen set value, an automatic measurement of OUR and SOUR will be performed.

Dissolved oxygen threshold setting (DO low point, high point) starts automatic OUR cycle mode, and the oxygen consumption rate (OUR) and specific oxygen consumption rate (SOUR) in each round of OUR cycle are automatically calculated

Loop OUR mode (2)

OUR&DO respiratory chart

■ R mode

After storing the baseline (initial oxygen level), add a sample with a set volume (Vm) and start the experiment. During the experiment, automatically measure the relevant parameters, output the results, and draw one or more synchronized parameter graphs (respiratory chart). At the same time, automatically calculate parameters such as Rs, Co, bCOD, U, q, etc.

Baseline of endogenous respiration sludge (Cb): Dissolved oxygen measurement (Cs) during sample addition to sludge. Exogenous oxygen consumption rate (Rs), oxygen consumption (CO), biodegradable chemical oxygen demand (bCOD), chemical oxygen demand absorption rate (U), and specific chemical oxygen demand absorption rate (q) are automatically calculated

Respiratory spectra of Rs, CO, and rbCOD

The main chemical oxygen demand components can be obtained through only two R-mode breath measurement tests

(*) rbCOD (Ss): usually refers to the biodegradable chemical oxygen demand of pure soluble samples

Why is it necessary to divide the chemical oxygen demand (COD) components in the activated sludge process?

Determine the chemical oxygen demand that can be biodegraded: Biodegradability (%)=100 × bCOD/COD;

Determine the chemical oxygen demand that cannot be biodegraded: nbCOD=COD - bCOD, non biodegradable ratio (Pnb)=100 × nbCOD/COD;

Explain the poor treatment effect caused by slow biodegradation: sbCOD=bCOD - rbCOD, slow biodegradation ratio (Psb)=100 × sbCOD/COD;

Related parameters: heterotrophic biomass yield coefficient (Y ₕ), oxygen consumption, chemical oxygen demand removal rate (q, U);

Application scenarios: Support simulation programs, chemical oxygen demand load rate analysis, organic oxygen demand assessment, nutrient ratio optimization, symptom suppression judgment, determination of chemical oxygen demand required for denitrification, etc.