diff --git a/backend/data_import/celery_tasks.py b/backend/data_import/celery_tasks.py
index e7f8fb25..2ae90b6c 100644
--- a/backend/data_import/celery_tasks.py
+++ b/backend/data_import/celery_tasks.py
@@ -8,16 +8,10 @@ from django.shortcuts import get_object_or_404
 from django_drf_filepond.api import store_upload
 from django_drf_filepond.models import TemporaryUpload
 
+from .datasets import load_dataset
 from .pipeline.catalog import AudioFile, ImageFile
 from .pipeline.exceptions import FileTypeException, MaximumFileSizeException
-from .pipeline.factories import (
-    create_builder,
-    create_cleaner,
-    create_parser,
-    select_examples,
-)
-from .pipeline.readers import FileName, Reader
-from .pipeline.writers import Writer
+from .pipeline.readers import FileName
 from projects.models import Project
 
 
@@ -41,13 +35,15 @@ def check_uploaded_files(upload_ids: List[str], file_format: str):
     temporary_uploads = TemporaryUpload.objects.filter(upload_id__in=upload_ids)
     for tu in temporary_uploads:
         if tu.file.size > settings.MAX_UPLOAD_SIZE:
-            errors.append(MaximumFileSizeException(tu.upload_name, settings.MAX_UPLOAD_SIZE).dict())
+            errors.append(MaximumFileSizeException(tu.upload_name, settings.MAX_UPLOAD_SIZE))
             tu.delete()
             continue
         try:
             check_file_type(tu.upload_name, file_format, tu.get_file_path())
         except FileTypeException as e:
-            errors.append(e.dict())
+            errors.append(e)
+            tu.delete()
+            continue
         cleaned_ids.append(tu.upload_id)
     return cleaned_ids, errors
 
@@ -64,15 +60,11 @@ def import_dataset(user_id, project_id, file_format: str, upload_ids: List[str],
         for tu in temporary_uploads
     ]
 
-    parser = create_parser(file_format, **kwargs)
-    builder = create_builder(project, **kwargs)
-    cleaner = create_cleaner(project)
-    reader = Reader(filenames=filenames, parser=parser, builder=builder, cleaner=cleaner)
-    writer = Writer(batch_size=settings.IMPORT_BATCH_SIZE)
-    examples = select_examples(project)
-    writer.save(reader, project, user, examples)
+    dataset = load_dataset(file_format, filenames, project, **kwargs)
+    dataset.save(user, batch_size=settings.IMPORT_BATCH_SIZE)
     upload_to_store(temporary_uploads)
-    return {"error": reader.errors + errors}
+    errors.extend(dataset.errors)
+    return {"error": [e.dict() for e in errors]}
 
 
 def upload_to_store(temporary_uploads):