diff --git a/reactor.html b/reactor.html
index cdca7c7..6825342 100644
--- a/reactor.html
+++ b/reactor.html
@@ -2,7 +2,7 @@
 
 <script type="text/javascript">
     RED.nodes.registerType("reactor", {
-        category: "WWTP",
+        category: "EVOLV",
         color: "#c4cce0",
         defaults: {
             name: { value: "" },
@@ -10,7 +10,6 @@
             volume: { value: 0., required: true },
             length: { value: 0.},
             resolution_L: { value: 0.},
-            alpha: {value: 0},
             kla: { value: null },
             
             S_O_init: { value: 0., required: true },
@@ -92,10 +91,6 @@
                     $(".PFR").show();
                 }
             });
-            $("#node-input-alpha").typedInput({
-                type:"num",
-                types:["num"]
-            })
             $("#node-input-timeStep").typedInput({
                 type:"num",
                 types:["num"]
@@ -149,13 +144,6 @@
         <label for="node-input-resolution_L"><i class="fa fa-tag"></i> Resolution</label>
         <input type="text" id="node-input-resolution_L" placeholder="#">
     </div>
-    <div class="PFR">
-        <p> Inlet boundary condition parameter &alpha; (&alpha; = 0: Danckwerts BC / &alpha; = 1: Dirichlet BC) </p>
-        <div class="form-row">
-            <label for="node-input-alpha"><i class="fa fa-tag"></i>Adjustable parameter BC</label>
-            <input type="text" id="node-input-alpha">
-        </div>
-    </div>
     <h3> Internal mass transfer calculation (optional) </h3>
     <div class="form-row">
         <label for="node-input-kla"><i class="fa fa-tag"></i> kLa [d-1]</label>
@@ -227,7 +215,6 @@
     <!-- Position fields will be injected here -->
     <div id="position-fields-placeholder"></div>
 
-
 </script>
 
 <script type="text/html" data-help-name="reactor">
diff --git a/src/nodeClass.js b/src/nodeClass.js
index 3abe037..cc42911 100644
--- a/src/nodeClass.js
+++ b/src/nodeClass.js
@@ -87,7 +87,6 @@ class nodeClass {
             volume: parseFloat(uiConfig.volume),
             length: parseFloat(uiConfig.length),
             resolution_L: parseInt(uiConfig.resolution_L),
-            alpha: parseFloat(uiConfig.alpha),
             kla: parseFloat(uiConfig.kla),
             initialState: [
                 parseFloat(uiConfig.S_O_init),
diff --git a/src/specificClass.js b/src/specificClass.js
index 3f368e1..793f741 100644
--- a/src/specificClass.js
+++ b/src/specificClass.js
@@ -25,7 +25,6 @@ class Reactor {
     this.logger = new logger(this.config.general.logging.enabled, this.config.general.logging.logLevel, config.general.name);
     this.emitter = new EventEmitter();
     this.measurements = new MeasurementContainer();
-    this.upstreamReactor = null;
     this.childRegistrationUtils = new childRegistrationUtils(this); // Child registration utility
 
     this.upstreamReactor = null;
@@ -74,9 +73,9 @@ class Reactor {
 
   /**
    * Getter for effluent data.
-   * @returns {object} Effluent data object (msg), defaults to inlet 0.
+   * @returns {object} Effluent data object (msg).
    */
-  get getEffluent() { // getter for Effluent, defaults to inlet 0
+  get getEffluent() {
     const Cs = isArray(this.state.at(-1)) ? this.state.at(-1) : this.state;
     const effluent = [{ topic: "Fluent", payload: { inlet: 0, F: math.sum(this.Fs), C: Cs }, timestamp: this.currentTime }];
     if (this.returnPump) {
@@ -268,8 +267,6 @@ class Reactor_PFR extends Reactor {
     this.d_x = this.length / this.n_x;
     this.A = this.volume / this.length; // crosssectional area [m2]
 
-    this.alpha = config.alpha;
-
     this.state = Array.from(Array(this.n_x), () => config.initialState.slice());
     this.extendedState = Array.from(Array(this.n_x + 2*BC_PADDING), () => new Array(ASM_CONSTANTS.NUM_SPECIES).fill(0));
 
@@ -375,7 +372,7 @@ class Reactor_PFR extends Reactor {
     } else {
       if (math.sum(this.Fs) > 0) { // Danckwerts BC
         const BC_C_in = math.multiply(1 / math.sum(this.Fs), [this.Fs], this.Cs_in)[0];
-        const BC_dispersion_term = (1-this.alpha)*this.D*this.A/(math.sum(this.Fs)*this.d_x);
+        const BC_dispersion_term = this.D*this.A/(math.sum(this.Fs)*this.d_x);
         this.extendedState[BC_PADDING] = math.multiply(1/(1+BC_dispersion_term), math.add(BC_C_in, math.multiply(BC_dispersion_term, this.extendedState[BC_PADDING+1])));
         this.extendedState[BC_PADDING-1] = math.add(math.multiply(2, this.extendedState[BC_PADDING]), math.multiply(-2, this.extendedState[BC_PADDING+2]), this.extendedState[BC_PADDING+3]);
       } else {
@@ -438,17 +435,4 @@ class Reactor_PFR extends Reactor {
   }
 }
 
-module.exports = { Reactor_CSTR, Reactor_PFR };
-
-// DEBUG
-// state: S_O, S_I, S_S, S_NH, S_N2, S_NO, S_HCO, X_I, X_S, X_H, X_STO, X_A, X_TS
-// let initial_state = [0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1];
-// const Reactor = new Reactor_PFR(200, 10, 10, 1, 100, initial_state);
-// Reactor.Cs_in[0] = [0.0, 30., 100., 16., 0., 0., 5., 25., 75., 30., 0., 0., 125.];
-// Reactor.Fs[0] = 10;
-// Reactor.D = 0.01;
-// let N = 0;
-// while (N < 5000) {
-//     console.log(Reactor.tick(0.001));
-//     N += 1;
-// }
\ No newline at end of file
+module.exports = { Reactor_CSTR, Reactor_PFR };
\ No newline at end of file